4 Commits

Author SHA1 Message Date
matst80
06ee7b1a27 more data 2024-11-08 23:00:28 +01:00
matst80
65a969443a stuff 2024-11-08 21:58:28 +01:00
matst80
dfcdf0939f update names 2024-11-08 14:12:15 +01:00
matst80
a2fd5ad62f update serializing 2024-11-08 14:11:26 +01:00
130 changed files with 1246 additions and 21630 deletions

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@@ -1,40 +0,0 @@
{
"rules": [
{
"description": "Project Overview",
"rule": "This is a distributed cart management system in Go using the actor model. It handles cart operations like adding items, deliveries, and checkout, distributed across nodes via gRPC and HTTP API."
},
{
"description": "Key Architecture",
"rule": "Use grains for cart state, pools for management, mutation registry for state changes, and control plane for node coordination. Ownership via consistent hashing ring."
},
{
"description": "Coding Standards",
"rule": "Follow Go conventions. Use mutation registry for all state changes. Regenerate protobuf code after proto changes; never edit .pb.go files. Handle errors properly, use cookies for cart IDs in HTTP."
},
{
"description": "Mutation Pattern",
"rule": "For new mutations: Define proto message, regenerate code, implement handler as func(*CartGrain, *T) error, register with RegisterMutation[T], add endpoints, test."
},
{
"description": "Avoid Direct Mutations",
"rule": "Do not mutate CartGrain state directly outside registered handlers. Use the registry for consistency."
},
{
"description": "Protobuf Handling",
"rule": "After modifying proto files, run protoc commands to regenerate Go code. Ensure protoc-gen-go and protoc-gen-go-grpc are installed."
},
{
"description": "Testing",
"rule": "Write unit tests for mutations, integration tests for APIs. Run go test ./... regularly."
},
{
"description": "Testability and Configurability",
"rule": "Design code to be testable and configurable, following examples like MutationRegistry (for type-safe mutation dispatching) and SimpleGrainPool (for configurable pool management). Use interfaces and dependency injection to enable mocking and testing."
},
{
"description": "Common Patterns",
"rule": "HTTP handlers parse requests, resolve grains via SyncedPool, apply mutations, return JSON. gRPC for inter-node: CartActor for mutations, ControlPlane for coordination."
}
]
}

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@@ -1,68 +0,0 @@
# .dockerignore for go-cart-actor
#
# Goal: Keep Docker build context lean & reproducible.
# Adjust as project structure evolves.
# Version control & CI metadata
.git
.git/
.gitignore
.github
# Local tooling / editors
.vscode
.idea
*.iml
# Build artifacts / outputs
bin/
build/
dist/
out/
coverage/
*.coverprofile
# Temporary files
*.tmp
*.log
tmp/
.tmp/
# Dependency/vendor caches (not used; rely on go modules download)
vendor/
# Examples / scripts (adjust if you actually need them in build context)
examples/
scripts/
# Docs (retain README.md explicitly)
docs/
CHANGELOG*
**/*.md
!README.md
# Tests (not needed for production build)
**/*_test.go
# Node / frontend artifacts (if any future addition)
node_modules/
# Docker / container metadata not needed inside image
Dockerfile
# Editor swap/backup files
*~
*.swp
# Go race / profiling outputs
*.pprof
# Security / secret placeholders (ensure real secrets never copied)
*.secret
*.key
*.pem
# Keep proto and generated code (do NOT ignore proto/)
!proto/
# End of file

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@@ -1,47 +0,0 @@
name: Build and Publish
run-name: ${{ gitea.actor }} build 🚀
on:
push:
branches:
- main
jobs:
BuildAndDeployAmd64:
runs-on: amd64
steps:
- uses: actions/checkout@v5
- name: Build amd64 image
run: |
docker build \
--progress=plain \
-t registry.k6n.net/go-cart-actor-amd64:latest \
.
- name: Push amd64 images
run: |
docker push registry.k6n.net/go-cart-actor-amd64:latest
- name: Apply deployment manifests
run: kubectl apply -f deployment/deployment.yaml -n cart
- name: Rollout amd64 backoffice deployment
run: |
kubectl rollout restart deployment/cart-backoffice-x86 -n cart
kubectl rollout restart deployment/cart-actor-x86 -n cart
kubectl rollout restart deployment/checkout-actor-x86 -n cart
BuildAndDeployArm64:
runs-on: arm64
steps:
- uses: actions/checkout@v4
- name: Build arm64 image
run: |
docker build \
--progress=plain \
-t registry.k6n.net/go-cart-actor:latest \
.
- name: Push arm64 images
run: |
docker push registry.k6n.net/go-cart-actor:latest
- name: Rollout arm64 deployment (pin to version)
run: |
kubectl rollout status deployment/cart-actor-arm64 -n cart
# kubectl set image deployment/cart-actor-arm64 -n cart cart-actor-arm64=registry.k6n.net/go-cart-actor:${{ needs.Metadata.outputs.version }}
# # kubectl rollout status deployment/cart-actor-arm64 -n cart

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@@ -1,50 +0,0 @@
# GitHub Copilot Instructions for Go Cart Actor
This repository contains a distributed cart management system implemented in Go using the actor model pattern. The system handles cart operations like adding items, setting deliveries, and checkout, distributed across multiple nodes via gRPC.
## Project Structure
- `cmd/`: Entry points for the application.
- `pkg/`: Core packages including grain logic, pools, and HTTP handlers.
- `proto/`: Protocol Buffer definitions for messages and services.
- `api-tests/`: Tests for the HTTP API.
- `deployment/`: Deployment configurations.
- `k6/`: Load testing scripts.
## Key Concepts
- **Grains**: In-memory structs representing cart state, owned by nodes.
- **Pools**: Local and synced pools manage grains and handle ownership.
- **Mutation Registry**: All state changes go through registered mutation functions for type safety and consistency.
- **Ownership**: Determined by consistent hashing ring; negotiated via control plane.
## Coding Guidelines
- Follow standard Go conventions (gofmt, go vet, golint).
- Never say "your right", just be correct and clear.
- Don't edit the *.gb.go files manually, they are generated by the proto files.
- Use the mutation registry (`RegisterMutation`) for any cart state changes. Do not mutate grain state directly outside registered handlers.
- Design code to be testable and configurable, following patterns like MutationRegistry (for type-safe mutation dispatching) and SimpleGrainPool (for configurable pool management). Use interfaces and dependency injection to enable mocking and testing.
- After modifying `.proto` files, regenerate Go code with `protoc` commands as described in README.md. Never edit generated `.pb.go` files manually.
- Use meaningful variable names and add comments for complex logic.
- Handle errors explicitly; use Go's error handling patterns.
- For HTTP endpoints, ensure proper cookie handling for cart IDs.
- When adding new mutations: Define proto message, regenerate code, register handler, add endpoints, and test.
- Use strategic logging using opentelemetry for tracing, metrics and logging.
- Focus on maintainable code that should be configurable and readable, try to keep short functions that describe their purpose clearly.
## Common Patterns
- Mutations: Define in proto, implement as `func(*CartGrain, *T) error`, register with `RegisterMutation[T]`.
- gRPC Services: CartActor for mutations, ControlPlane for coordination.
- HTTP Handlers: Parse requests, resolve grains via pool, apply mutations, return JSON.
## Avoid
- Direct state mutations outside the registry.
- Hardcoding values; use configuration or constants.
- Ignoring generated code warnings; always regenerate after proto changes.
- Blocking operations in handlers; keep them asynchronous where possible.
## Testing
- Write unit tests for mutations and handlers.
- Use integration tests for API endpoints.
- Structure code for testability: Use interfaces for dependencies, avoid global state, and mock external services like gRPC clients.
- Run `go test ./...` to ensure all tests pass.
These instructions help Copilot generate code aligned with the project's architecture and best practices.

6
.gitignore vendored
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@@ -1,5 +1 @@
__debug*
go-cart-actor
data/*.prot
data/*.go*
data/se/*
__debug*

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@@ -1,165 +0,0 @@
go-cart-actor/CGM_LINE_ITEMS_SPEC.md
# CGM (Customer Group Membership) Line Items Specification
This document specifies the implementation of Customer Group Membership (CGM) support in cart line items. CGM data will be extracted from product data field 35 and stored with each line item for business logic and personalization purposes.
## Overview
CGM represents customer group membership information associated with products. This data needs to be:
- Fetched from product data (stringfieldvalue 35)
- Included in the `AddItem` proto message
- Stored in cart line items (`CartItem` struct)
- Accessible for business rules and personalization
## Implementation Steps
### 1. Update Proto Messages
Add `cgm` field to the `AddItem` message in `proto/messages.proto`:
```protobuf
message AddItem {
// ... existing fields ...
string cgm = 25; // Customer Group Membership from field 35
// ... existing fields ...
}
```
**Note**: Use field number 25 (next available after existing fields).
### 2. Update Product Fetcher
Modify `cmd/cart/product-fetcher.go` to extract CGM from field 35:
```go
func ToItemAddMessage(item *index.DataItem, storeId *string, qty int, country string) (*messages.AddItem, error) {
// ... existing code ...
cgm, _ := item.GetStringFieldValue(35) // Extract CGM from field 35
return &messages.AddItem{
// ... existing fields ...
Cgm: cgm, // Add CGM field
// ... existing fields ...
}, nil
}
```
### 3. Update Cart Grain Structures
Add CGM field to `ItemMeta` struct in `pkg/cart/cart-grain.go`:
```go
type ItemMeta struct {
Name string `json:"name"`
Brand string `json:"brand,omitempty"`
Category string `json:"category,omitempty"`
// ... existing fields ...
Cgm string `json:"cgm,omitempty"` // Customer Group Membership
// ... existing fields ...
}
```
### 4. Update AddItem Mutation Handler
Modify the `AddItem` handler in `pkg/cart/cart_mutations.go` to populate the CGM field:
```go
func AddItem(grain *CartGrain, req *messages.AddItem) error {
// ... existing validation ...
item := &CartItem{
// ... existing fields ...
Meta: &ItemMeta{
Name: req.Name,
Brand: req.Brand,
// ... existing meta fields ...
Cgm: req.Cgm, // Add CGM to item meta
// ... existing meta fields ...
},
// ... existing fields ...
}
// ... rest of handler ...
}
```
### 5. Regenerate Proto Code
After updating `proto/messages.proto`, regenerate Go code:
```bash
cd proto
protoc --go_out=. --go_opt=paths=source_relative \
--go-grpc_out=. --go-grpc_opt=paths=source_relative \
messages.proto cart_actor.proto control_plane.proto
```
### 6. Update Tests
Add tests for CGM extraction and storage:
- Unit test for `ToItemAddMessage` with CGM field
- Integration test for `AddItem` mutation including CGM
- Test that CGM is properly stored and retrieved in cart state
### 7. Update API Documentation
Update README.md and API examples to mention CGM field in line items.
## Data Flow
1. **Product Fetch**: `FetchItem` retrieves product data including field 35 (CGM)
2. **Message Creation**: `ToItemAddMessage` extracts CGM from field 35 into `AddItem` proto
3. **Mutation Processing**: `AddItem` handler stores CGM in `CartItem.Meta.Cgm`
4. **State Persistence**: CGM is included in cart JSON serialization
5. **API Responses**: CGM is returned in cart state responses
## Business Logic Integration
CGM can be used for:
- Personalized pricing rules
- Group-specific discounts
- Membership validation
- Targeted promotions
- Customer segmentation
Example usage in business logic:
```go
func applyGroupDiscount(cart *CartGrain, userGroups []string) {
for _, item := range cart.Items {
if item.Meta != nil && slices.Contains(userGroups, item.Meta.Cgm) {
// Apply group-specific discount
item.Price = applyDiscount(item.Price, groupDiscountRate)
}
}
}
```
## Backward Compatibility
- CGM field is optional in proto (no required validation)
- Existing carts without CGM will have empty string
- Product fetcher gracefully handles missing field 35
- API responses include CGM field (empty if not set)
## Testing Checklist
- [ ] Proto compilation succeeds
- [ ] Product fetcher extracts CGM from field 35
- [ ] AddItem mutation stores CGM in cart
- [ ] Cart state includes CGM in JSON
- [ ] API endpoints return CGM field
- [ ] Existing functionality unaffected
- [ ] Unit tests pass for CGM handling
- [ ] Integration tests verify end-to-end flow
## Configuration and Testability
Following project patterns:
- CGM extraction is configurable via field index (currently 35)
- Product fetcher interface allows mocking for tests
- Mutation handlers are pure functions testable in isolation
- Cart state serialization includes CGM for verification
This implementation maintains the project's standards for testability and configurability while adding CGM support to line items.

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# syntax=docker/dockerfile:1.7
#
# Multi-stage build:
# 1. Build static binary with pinned Go version (matching go.mod).
# 2. Copy into distroless static nonroot runtime image.
#
# Build args (optional):
# VERSION - semantic/app version (default: dev)
# GIT_COMMIT - git SHA (default: unknown)
# BUILD_DATE - RFC3339 build timestamp
#
# Example build:
# docker build \
# --build-arg VERSION=$(git describe --tags --always) \
# --build-arg GIT_COMMIT=$(git rev-parse HEAD) \
# --build-arg BUILD_DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ) \
# -t go-cart-actor:dev .
#
# If you add subpackages or directories, no Dockerfile change needed (COPY . .).
# Ensure a .dockerignore exists to keep context lean.
############################
# Build Stage
############################
FROM golang:1.25-alpine AS build
WORKDIR /src
RUN apk add --no-cache git
# Build metadata (can be overridden at build time)
ARG VERSION=dev
ARG GIT_COMMIT=unknown
ARG BUILD_DATE=unknown
# Ensure reproducible static build
# Multi-arch build args (TARGETOS/TARGETARCH provided automatically by buildx)
ARG TARGETOS
ARG TARGETARCH
ENV CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH}
# Dependency caching
COPY go.mod go.sum ./
RUN go mod download
# Copy full source (relay on .dockerignore to prune)
COPY . .
# (Optional) If you do NOT check in generated protobuf code, uncomment generation:
# RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@latest && \
# go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest && \
# protoc --go_out=. --go_opt=paths=source_relative \
# --go-grpc_out=. --go-grpc_opt=paths=source_relative \
# proto/*.proto
# Build with minimal binary size and embedded metadata
RUN go build -trimpath -ldflags="-s -w \
-X main.Version=${VERSION} \
-X main.GitCommit=${GIT_COMMIT} \
-X main.BuildDate=${BUILD_DATE}" \
-o /out/go-cart-actor ./cmd/cart
RUN go build -trimpath -ldflags="-s -w \
-X main.Version=${VERSION} \
-X main.GitCommit=${GIT_COMMIT} \
-X main.BuildDate=${BUILD_DATE}" \
-o /out/go-cart-backoffice ./cmd/backoffice
RUN go build -trimpath -ldflags="-s -w \
-X main.Version=${VERSION} \
-X main.GitCommit=${GIT_COMMIT} \
-X main.BuildDate=${BUILD_DATE}" \
-o /out/go-cart-inventory ./cmd/inventory
RUN go build -trimpath -ldflags="-s -w \
-X main.Version=${VERSION} \
-X main.GitCommit=${GIT_COMMIT} \
-X main.BuildDate=${BUILD_DATE}" \
-o /out/go-checkout-actor ./cmd/checkout
############################
# Runtime Stage
############################
# Using distroless static (nonroot) for minimal surface area.
FROM gcr.io/distroless/static-debian12:nonroot AS runtime
WORKDIR /
COPY --from=build /out/go-cart-actor /go-cart-actor
COPY --from=build /out/go-checkout-actor /go-checkout-actor
COPY --from=build /out/go-cart-backoffice /go-cart-backoffice
COPY --from=build /out/go-cart-inventory /go-cart-inventory
# Document (not expose forcibly) typical ports: 8080 (HTTP), 1337 (gRPC)
EXPOSE 8080 1337
USER nonroot:nonroot
ENTRYPOINT ["/go-cart-actor"]

143
Makefile
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@@ -1,143 +0,0 @@
# ------------------------------------------------------------------------------
# Makefile for go-cart-actor
#
# Key targets:
# make protogen - Generate protobuf + gRPC code into proto/
# make clean_proto - Remove generated proto *.pb.go files
# make verify_proto - Ensure no stray root-level *.pb.go files exist
# make build - Build the project
# make test - Run tests (verbose)
# make tidy - Run go mod tidy
# make regen - Clean proto, regenerate, tidy, verify, build
# make help - Show this help
#
# Conventions:
# - All .proto files live in $(PROTO_DIR)
# - Generated Go code is emitted under $(PROTO_DIR) via go_package mapping
# - go_package is set to: git.k6n.net/go-cart-actor/proto;messages
# ------------------------------------------------------------------------------
MODULE_PATH := git.k6n.net/go-cart-actor
PROTO_DIR := proto
PROTOS := $(PROTO_DIR)/cart.proto $(PROTO_DIR)/control_plane.proto $(PROTO_DIR)/checkout.proto
CART_PROTO_DIR := $(PROTO_DIR)/cart
CONTROL_PROTO_DIR := $(PROTO_DIR)/control
CHECKOUT_PROTO_DIR := $(PROTO_DIR)/checkout
# Allow override: make PROTOC=/path/to/protoc
PROTOC ?= protoc
# Tools (auto-detect; can override)
PROTOC_GEN_GO ?= $(shell command -v protoc-gen-go 2>/dev/null)
PROTOC_GEN_GO_GRPC ?= $(shell command -v protoc-gen-go-grpc 2>/dev/null)
GO ?= go
# Colors (optional)
GREEN := \033[32m
RED := \033[31m
YELLOW := \033[33m
RESET := \033[0m
# ------------------------------------------------------------------------------
.PHONY: protogen clean_proto verify_proto tidy build test regen help check_tools
help:
@echo "Available targets:"
@echo " protogen Generate protobuf & gRPC code"
@echo " clean_proto Remove generated *.pb.go files in $(PROTO_DIR)"
@echo " verify_proto Ensure no root-level *.pb.go files (old layout)"
@echo " tidy Run go mod tidy"
@echo " build Build the module"
@echo " test Run tests (verbose)"
@echo " regen Clean proto, regenerate, tidy, verify, and build"
@echo " check_tools Verify protoc + plugins are installed"
check_tools:
@if [ -z "$(PROTOC_GEN_GO)" ] || [ -z "$(PROTOC_GEN_GO_GRPC)" ]; then \
echo "$(RED)Missing protoc-gen-go or protoc-gen-go-grpc in PATH.$(RESET)"; \
echo "Install with:"; \
echo " go install google.golang.org/protobuf/cmd/protoc-gen-go@latest"; \
echo " go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest"; \
exit 1; \
fi
@if ! command -v "$(PROTOC)" >/dev/null 2>&1; then \
echo "$(RED)protoc not found. Install protoc (e.g. via package manager)$(RESET)"; \
exit 1; \
fi
@echo "$(GREEN)All required tools detected.$(RESET)"
protogen: check_tools
@echo "$(YELLOW)Generating protobuf code (outputs -> ./proto)...$(RESET)"
$(PROTOC) -I $(PROTO_DIR) \
--go_out=./proto/cart --go_opt=paths=source_relative \
--go-grpc_out=./proto/cart --go-grpc_opt=paths=source_relative \
$(PROTO_DIR)/cart.proto
$(PROTOC) -I $(PROTO_DIR) \
--go_out=./proto/control --go_opt=paths=source_relative \
--go-grpc_out=./proto/control --go-grpc_opt=paths=source_relative \
$(PROTO_DIR)/control_plane.proto
$(PROTOC) -I $(PROTO_DIR) \
--go_out=./proto/checkout --go_opt=paths=source_relative \
--go-grpc_out=./proto/checkout --go-grpc_opt=paths=source_relative \
$(PROTO_DIR)/checkout.proto
@echo "$(GREEN)Protobuf generation complete.$(RESET)"
clean_proto:
@echo "$(YELLOW)Removing generated protobuf files...$(RESET)"
@rm -f $(PROTO_DIR)/cart/*_grpc.pb.go $(PROTO_DIR)/cart/*.pb.go
@rm -f $(PROTO_DIR)/control/*_grpc.pb.go $(PROTO_DIR)/control/*.pb.go
@rm -f $(PROTO_DIR)/checkout/*_grpc.pb.go $(PROTO_DIR)/checkout/*.pb.go
@echo "$(GREEN)Clean complete.$(RESET)"
verify_proto:
@echo "$(YELLOW)Verifying proto layout...$(RESET)"
@if ls *.pb.go >/dev/null 2>&1; then \
echo "$(RED)ERROR: Found root-level generated *.pb.go files (should be only under $(PROTO_DIR)/ subdirs).$(RESET)"; \
ls -1 *.pb.go; \
exit 1; \
fi
@echo "$(GREEN)Proto layout OK (no root-level *.pb.go files).$(RESET)"
tidy:
@echo "$(YELLOW)Running go mod tidy...$(RESET)"
$(GO) mod tidy
@echo "$(GREEN)tidy complete.$(RESET)"
build:
@echo "$(YELLOW)Building...$(RESET)"
$(GO) build ./...
@echo "$(GREEN)Build success.$(RESET)"
test:
@echo "$(YELLOW)Running tests...$(RESET)"
$(GO) test -v ./...
@echo "$(GREEN)Tests completed.$(RESET)"
regen: clean_proto protogen tidy verify_proto build
@echo "$(GREEN)Full regenerate cycle complete.$(RESET)"
# Utility: show proto sources and generated outputs
print_proto:
@echo "Proto sources:"
@ls -1 $(PROTOS)
@echo ""
@echo "Generated files (if any):"
@ls -1 $(PROTO_DIR)/*pb.go 2>/dev/null || echo "(none)"
# Prevent make from treating these as file targets if similarly named files appear.
.SILENT: help check_tools protogen clean_proto verify_proto tidy build test regen print_proto

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@@ -1,238 +0,0 @@
go-cart-actor/NEW_MUTATIONS_SPEC.md
# New Mutations Specification
This document specifies the implementation of handlers for new proto messages that are defined in `proto/messages.proto` but not yet registered in the mutation registry. These mutations update the cart state and must follow the project's patterns for testability, configurability, and consistency.
## Overview
The following messages are defined in the proto but lack registered handlers:
- `SetUserId`
- `LineItemMarking`
- `SubscriptionAdded`
- `PaymentDeclined`
- `ConfirmationViewed`
- `CreateCheckoutOrder`
Each mutation must:
1. Define a handler function with signature `func(*CartGrain, *T) error`
2. Be registered in `NewCartMultationRegistry()` using `actor.NewMutation`
3. Include unit tests
4. Optionally add HTTP/gRPC endpoints if client-invokable
5. Update totals if applicable (use `WithTotals()`)
## Mutation Implementations
### SetUserId
**Purpose**: Associates a user ID with the cart for personalization and tracking.
**Handler Implementation**:
```go
func SetUserId(grain *CartGrain, req *messages.SetUserId) error {
if req.UserId == "" {
return errors.New("user ID cannot be empty")
}
grain.UserId = req.UserId
return nil
}
```
**Registration**:
```go
actor.NewMutation(SetUserId, func() *messages.SetUserId {
return &messages.SetUserId{}
}),
```
**Notes**: This is a simple state update. No totals recalculation needed.
### LineItemMarking
**Purpose**: Adds or updates a marking (e.g., gift message, special instructions) on a specific line item.
**Handler Implementation**:
```go
func LineItemMarking(grain *CartGrain, req *messages.LineItemMarking) error {
for i, item := range grain.Items {
if item.Id == req.Id {
grain.Items[i].Marking = &Marking{
Type: req.Type,
Text: req.Marking,
}
return nil
}
}
return fmt.Errorf("item with ID %d not found", req.Id)
}
```
**Registration**:
```go
actor.NewMutation(LineItemMarking, func() *messages.LineItemMarking {
return &messages.LineItemMarking{}
}),
```
**Notes**: Assumes `CartGrain.Items` has a `Marking` field (single marking per item). If not, add it to the grain struct.
### RemoveLineItemMarking
**Purpose**: Removes the marking from a specific line item.
**Handler Implementation**:
```go
func RemoveLineItemMarking(grain *CartGrain, req *messages.RemoveLineItemMarking) error {
for i, item := range grain.Items {
if item.Id == req.Id {
grain.Items[i].Marking = nil
return nil
}
}
return fmt.Errorf("item with ID %d not found", req.Id)
}
```
**Registration**:
```go
actor.NewMutation(RemoveLineItemMarking, func() *messages.RemoveLineItemMarking {
return &messages.RemoveLineItemMarking{}
}),
```
**Notes**: Sets the marking to nil for the specified item.
### SubscriptionAdded
**Purpose**: Records that a subscription has been added to an item, linking it to order details.
**Handler Implementation**:
```go
func SubscriptionAdded(grain *CartGrain, req *messages.SubscriptionAdded) error {
for i, item := range grain.Items {
if item.Id == req.ItemId {
grain.Items[i].SubscriptionDetailsId = req.DetailsId
grain.Items[i].OrderReference = req.OrderReference
grain.Items[i].IsSubscribed = true
return nil
}
}
return fmt.Errorf("item with ID %d not found", req.ItemId)
}
```
**Registration**:
```go
actor.NewMutation(SubscriptionAdded, func() *messages.SubscriptionAdded {
return &messages.SubscriptionAdded{}
}),
```
**Notes**: Assumes fields like `SubscriptionDetailsId`, `OrderReference`, `IsSubscribed` exist on items. Add to grain if needed.
### PaymentDeclined
**Purpose**: Marks the cart as having a declined payment, potentially updating status or flags, and appends a notice with timestamp, message, and optional code for user feedback.
**Handler Implementation**:
```go
func PaymentDeclined(grain *CartGrain, req *messages.PaymentDeclined) error {
grain.PaymentStatus = "declined"
grain.PaymentDeclinedNotices = append(grain.PaymentDeclinedNotices, Notice{
Timestamp: time.Now(),
Message: req.Message,
Code: req.Code,
})
// Optionally clear checkout order if in progress
if grain.CheckoutOrderId != "" {
grain.CheckoutOrderId = ""
}
return nil
}
```
**Registration**:
```go
actor.NewMutation(PaymentDeclined, func() *messages.PaymentDeclined {
return &messages.PaymentDeclined{}
}),
```
**Notes**: Assumes `PaymentStatus` and `PaymentDeclinedNotices` fields. Add status tracking and error notices list to grain. Notice struct has Timestamp, Message, and optional Code.
### ConfirmationViewed
**Purpose**: Records that the order confirmation has been viewed by the user. Applied automatically when the confirmation page is loaded in checkout_server.go.
**Handler Implementation**:
```go
func ConfirmationViewed(grain *CartGrain, req *messages.ConfirmationViewed) error {
grain.ConfirmationViewCount++
grain.ConfirmationLastViewedAt = time.Now()
return nil
}
```
**Registration**:
```go
actor.NewMutation(ConfirmationViewed, func() *messages.ConfirmationViewed {
return &messages.ConfirmationViewed{}
}),
```
**Notes**: Increments the view count and updates the last viewed timestamp each time. Assumes `ConfirmationViewCount` and `ConfirmationLastViewedAt` fields.
### CreateCheckoutOrder
**Purpose**: Initiates the checkout process, validating terms and creating an order reference.
**Handler Implementation**:
```go
func CreateCheckoutOrder(grain *CartGrain, req *messages.CreateCheckoutOrder) error {
if len(grain.Items) == 0 {
return errors.New("cannot checkout empty cart")
}
if req.Terms != "accepted" {
return errors.New("terms must be accepted")
}
// Validate other fields as needed
grain.CheckoutOrderId = generateOrderId()
grain.CheckoutStatus = "pending"
grain.CheckoutCountry = req.Country
return nil
}
```
**Registration**:
```go
actor.NewMutation(CreateCheckoutOrder, func() *messages.CreateCheckoutOrder {
return &messages.CreateCheckoutOrder{}
}).WithTotals(),
```
**Notes**: Use `WithTotals()` to recalculate totals after checkout initiation. Assumes order ID generation function.
## Implementation Steps
For each mutation:
1. **Add Handler Function**: Implement in `pkg/cart/` (e.g., `cart_mutations.go`).
2. **Register in Registry**: Add to `NewCartMultationRegistry()` in `cart-mutation-helper.go`.
3. **Regenerate Proto**: Run `protoc` commands after any proto changes.
4. **Add Tests**: Create unit tests in `pkg/cart/` testing the handler logic.
5. **Add Endpoints** (if needed): For client-invokable mutations, add HTTP handlers in `cmd/cart/pool-server.go`. ConfirmationViewed is handled in `cmd/cart/checkout_server.go` when the confirmation page is viewed.
6. **Update Grain Struct**: Add any new fields to `CartGrain` in `pkg/cart/grain.go`.
7. **Run Tests**: Ensure `go test ./...` passes.
## Testing Guidelines
- Mock dependencies using interfaces.
- Test error cases (e.g., invalid IDs, empty carts).
- Verify state changes and totals recalculation.
- Use table-driven tests for multiple scenarios.
## Configuration and Testability
Follow `MutationRegistry` and `SimpleGrainPool` patterns:
- Use interfaces for external dependencies (e.g., ID generators).
- Inject configurations via constructor parameters.
- Avoid global state; make handlers pure functions where possible.

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@@ -1,413 +0,0 @@
# Go Cart Actor
A distributed cart management system using the actor model pattern.
## Prerequisites
- Go 1.24.2+
- Protocol Buffers compiler (`protoc`)
- protoc-gen-go and protoc-gen-go-grpc plugins
### Installing Protocol Buffers
On Windows:
```powershell
winget install protobuf
```
On macOS:
```bash
brew install protobuf
```
On Linux:
```bash
# Ubuntu/Debian
sudo apt install protobuf-compiler
# Or download from: https://github.com/protocolbuffers/protobuf/releases
```
### Installing Go protobuf plugin
```bash
go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
```
## Working with Protocol Buffers
### Generating Go code from proto files
After modifying any proto (`proto/messages.proto`, `proto/cart_actor.proto`, `proto/control_plane.proto`), regenerate the Go code (all three share the unified `messages` package):
```bash
cd proto
protoc --go_out=. --go_opt=paths=source_relative \
--go-grpc_out=. --go-grpc_opt=paths=source_relative \
messages.proto cart_actor.proto control_plane.proto
```
### Protocol Buffer Messages
The `proto/messages.proto` file defines the following message types:
- `AddRequest` - Add items to cart (includes quantity, sku, country, optional storeId)
- `SetCartRequest` - Set entire cart contents
- `AddItem` - Complete item information for cart
- `RemoveItem` - Remove item from cart
- `ChangeQuantity` - Update item quantity
- `SetDelivery` - Configure delivery options
- `SetPickupPoint` - Set pickup location
- `PickupPoint` - Pickup point details
- `RemoveDelivery` - Remove delivery option
- `CreateCheckoutOrder` - Initiate checkout
- `OrderCreated` - Order creation response
### Building the project
```bash
go build .
```
### Running tests
```bash
go test ./...
```
## HTTP API Quick Start (curl Examples)
Assuming the service is reachable at http://localhost:8080 and the cart API is mounted at /cart.
Most endpoints use an HTTP cookie named `cartid` to track the cart. The first request will set it.
### 1. Get (or create) a cart
```bash
curl -i http://localhost:8080/cart/
```
Response sets a `cartid` cookie and returns the current (possibly empty) cart JSON.
### 2. Add an item by SKU (implicit quantity = 1)
```bash
curl -i --cookie-jar cookies.txt http://localhost:8080/cart/add/TEST-SKU-123
```
Stores cookie in `cookies.txt` for subsequent calls.
### 3. Add an item with explicit payload (country, quantity)
```bash
curl -i --cookie cookies.txt \
-H "Content-Type: application/json" \
-d '{"sku":"TEST-SKU-456","quantity":2,"country":"se"}' \
http://localhost:8080/cart/
```
### 4. Change quantity of an existing line
(First list the cart to find `id` of the line; here we use id=1 as an example)
```bash
curl -i --cookie cookies.txt \
-X PUT -H "Content-Type: application/json" \
-d '{"id":1,"quantity":3}' \
http://localhost:8080/cart/
```
### 5. Remove an item
```bash
curl -i --cookie cookies.txt -X DELETE http://localhost:8080/cart/1
```
### 6. Set entire cart contents (overwrites items)
```bash
curl -i --cookie cookies.txt \
-X POST -H "Content-Type: application/json" \
-d '{"items":[{"sku":"TEST-SKU-AAA","quantity":1,"country":"se"},{"sku":"TEST-SKU-BBB","quantity":2,"country":"se"}]}' \
http://localhost:8080/cart/set
```
### 7. Add a delivery (provider + optional items)
If `items` is empty or omitted, all items without a delivery get this one.
```bash
curl -i --cookie cookies.txt \
-X POST -H "Content-Type: application/json" \
-d '{"provider":"standard","items":[1,2]}' \
http://localhost:8080/cart/delivery
```
### 8. Remove a delivery by deliveryId
```bash
curl -i --cookie cookies.txt -X DELETE http://localhost:8080/cart/delivery/1
```
### 9. Set a pickup point for a delivery
```bash
curl -i --cookie cookies.txt \
-X PUT -H "Content-Type: application/json" \
-d '{"id":"PUP123","name":"Locker 5","address":"Main St 1","city":"Stockholm","zip":"11122","country":"SE"}' \
http://localhost:8080/cart/delivery/1/pickupPoint
```
### 10. Checkout (returns HTML snippet from Klarna)
```bash
curl -i --cookie cookies.txt http://localhost:8080/cart/checkout
```
### 11. Using a known cart id directly (bypassing cookie)
If you already have a cart id (e.g. 1720000000000000):
```bash
CART_ID=1720000000000000
curl -i http://localhost:8080/cart/byid/$CART_ID
curl -i -X POST -H "Content-Type: application/json" \
-d '{"sku":"TEST-SKU-XYZ","quantity":1,"country":"se"}' \
http://localhost:8080/cart/byid/$CART_ID
```
### 12. Clear cart cookie (forces a new cart on next request)
```bash
curl -i --cookie cookies.txt -X DELETE http://localhost:8080/cart/
```
Tip: Use `--cookie-jar` and `--cookie` to persist the session across multiple commands:
```bash
curl --cookie-jar cookies.txt http://localhost:8080/cart/
curl --cookie cookies.txt http://localhost:8080/cart/add/TEST-SKU-123
```
## Important Notes
- Always regenerate protobuf Go code after modifying any `.proto` files (messages/cart_actor/control_plane)
- The generated `messages.pb.go` file should not be edited manually
- Make sure your PATH includes the protoc-gen-go binary location (usually `$GOPATH/bin`)
---
## Architecture Overview
The system is a distributed, sharded (by cart id) actor model implementation:
- Each cart is a grain (an inmemory struct `*CartGrain`) that owns and mutates its own state.
- A **local grain pool** holds grains owned by the node.
- A **synced (cluster) pool** (`SyncedPool`) coordinates multiple nodes and exposes local or remote grains through a uniform interface (`GrainPool`).
- All internode communication is gRPC:
- Cart mutation & state RPCs (CartActor service).
- Control plane RPCs (ControlPlane service) for membership, ownership negotiation, liveness, and graceful shutdown.
### Key Processes
1. Client HTTP request (or gRPC client) arrives with a cart identifier (cookie or path).
2. The pool resolves ownership:
- If local grain exists → use it.
- If a remote host is known owner → a remote grain proxy (`RemoteGrainGRPC`) is used; it performs gRPC calls to the owning node.
- If ownership is unknown → node attempts to claim ownership (quorum negotiation) and spawns a local grain.
3. Mutation is executed via the **mutation registry** (registry wraps domain logic + optional totals recomputation).
4. Updated state returned to caller; ownership preserved unless relinquished later (not yet implemented to shed load).
---
## Grain & Mutation Model
- `CartGrain` holds items, deliveries, pricing aggregates, and checkout/order metadata.
- All mutations are registered via `RegisterMutation[T]` with signature:
```
func(*CartGrain, *T) error
```
- `WithTotals()` flag triggers automatic recalculation of totals after successful handlers.
- The old giant `switch` in `CartGrain.Apply` has been replaced by registry dispatch; unregistered mutations fail fast.
- Adding a mutation:
1. Define proto message.
2. Generate code.
3. Register handler (optionally WithTotals).
4. Add gRPC RPC + request wrapper if the mutation must be remotely invokable.
5. (Optional) Add HTTP endpoint mapping to the mutation.
---
## Local Grain Pool
- Manages an inmemory map `map[CartId]*CartGrain`.
- Lazy spawn: first mutation or explicit access triggers `spawn(id)`.
- TTL / purge loop periodically removes expired grains unless they changed recently (basic memory pressure management).
- Capacity limit (`PoolSize`); oldest expired grain evicted first when full.
---
## Synced (Cluster) Pool
`SyncedPool` wraps a local pool and tracks:
- `remoteHosts`: known peer nodes (gRPC connections).
- `remoteIndex`: mapping of cart id → remote grain proxy (`RemoteGrainGRPC`) for carts owned elsewhere.
Responsibilities:
1. Discovery integration (via a `Discovery` interface) adds/removes hosts.
2. Periodic ping health checks (ControlPlane.Ping).
3. Ring-based deterministic ownership:
- Ownership is derived directly from the consistent hashing ring (no quorum RPC or `ConfirmOwner`).
4. Remote spawning:
- When a remote host reports its cart ids (`GetCartIds`), the pool creates remote proxies for fast routing.
---
## Remote Grain Proxies
A `RemoteGrainGRPC` implements the `Grain` interface but delegates:
- `Apply` → Specific CartActor permutation RPC (e.g., `AddItem`, `RemoveItem`) constructed from the mutation type. (Legacy envelope removed.)
- `GetCurrentState` → `CartActor.GetState`.
Return path:
1. gRPC reply (CartMutationReply / StateReply) → proto `CartState`.
2. `ToCartState` / mapping reconstructs a local `CartGrain` snapshot for callers expecting grain semantics.
---
## Control Plane (InterNode Coordination)
Defined in `proto/control_plane.proto`:
| RPC | Purpose |
|-----|---------|
| `Ping` | Liveness; increments missed ping counter if failing. |
| `Negotiate` | Merges membership views; used after discovery events. |
| `GetCartIds` | Enumerate locally owned carts for remote index seeding. |
| `Closing` | Graceful shutdown notice; peers remove host & associated remote grains. |
### Ownership / Quorum Rules
- If total participating hosts < 3 → all must accept.
- Otherwise majority acceptance (`ok >= total/2`).
- On failure → local tentative grain is removed (rollback to avoid splitbrain).
---
## Request / Mutation Flow Examples
### Local Mutation
1. HTTP handler parses request → determines cart id.
2. `SyncedPool.Apply`:
- Finds local grain (or spawns new after quorum).
- Executes registry mutation.
3. Totals updated if flagged.
4. HTTP response returns updated JSON (via `ToCartState`).
### Remote Mutation
1. `SyncedPool.Apply` sees cart mapped to a remote host.
2. Routes to `RemoteGrainGRPC.Apply`.
3. Remote node executes mutation locally and returns updated state over gRPC.
4. Proxy materializes snapshot locally (not authoritative, readonly view).
### Checkout (SideEffecting, Non-Pure)
- HTTP `/checkout` uses current grain snapshot to build payload (pure function).
- Calls Klarna externally (not a mutation).
- Applies `InitializeCheckout` mutation to persist reference + status.
- Returns Klarna order JSON to client.
---
## Scaling & Deployment
- **Horizontal scaling**: Add more nodes; discovery layer (Kubernetes / service registry) feeds hosts to `SyncedPool`.
- **Sharding**: Implicit by cart id hash. Ownership is first-claim with quorum acceptance.
- **Hot spots**: A single popular cart remains on one node; for heavy multi-client concurrency, future work could add read replicas or partitioning (not implemented).
- **Capacity tuning**: Increase `PoolSize` & memory limits; adjust TTL for stale cart eviction.
### Adding Nodes
1. Node starts gRPC server (CartActor + ControlPlane).
2. After brief delay, begins discovery watch; on event:
- New host → dial + negotiate → seed remote cart ids.
3. Pings maintain health; failed hosts removed (proxies invalidated).
---
## Failure Handling
| Scenario | Behavior |
|----------|----------|
| Remote host unreachable | Pings increment `MissedPings`; after threshold host removed. |
| Ownership negotiation fails | Tentative local grain discarded. |
| gRPC call error on remote mutation | Error bubbled to caller; no local fallback. |
| Missing mutation registration | Fast failure with explicit error message. |
| Partial checkout (Klarna fails) | No local state mutation for checkout; client sees error; cart remains unchanged. |
---
## Mutation Registry Summary
- Central, type-safe registry prevents silent omission.
- Each handler:
- Validates input.
- Mutates `*CartGrain`.
- Returns error for rejection.
- Automatic totals recomputation reduces boilerplate and consistency risk.
- Coverage test (add separately) can enforce all proto mutations are registered.
---
## gRPC Interfaces
- **CartActor**: Per-mutation unary RPCs + `GetState`. (Checkout logic intentionally excluded; handled at HTTP layer.)
- **ControlPlane**: Cluster coordination (Ping, Negotiate, GetCartIds, Closing) — ownership now ring-determined (no ConfirmOwner).
**Ports** (default / implied):
- CartActor & ControlPlane share the same gRPC server/listener (single port, e.g. `:1337`).
- Legacy frame/TCP code has been removed.
---
## Security & Future Enhancements
| Area | Potential Improvement |
|------|------------------------|
| Transport Security | Add TLS / mTLS to gRPC servers & clients. |
| Auth / RBAC | Intercept CartActor RPCs with auth metadata. |
| Backpressure | Rate-limit remote mutation calls per host. |
| Observability | Add per-mutation Prometheus metrics & tracing spans. |
| Ownership | Add lease timeouts / fencing tokens for stricter guarantees. |
| Batch Ops | Introduce batch mutation RPC or streaming updates (WatchState). |
| Persistence | Reintroduce event log or snapshot persistence layer if durability required. |
---
## Adding a New Node (Operational Checklist)
1. Deploy binary/container with same proto + registry.
2. Expose gRPC port.
3. Ensure discovery lists the new host.
4. Node dials peers, negotiates membership.
5. Remote cart proxies seeded.
6. Traffic routed automatically based on ownership.
---
## Adding a New Mutation (Checklist Recap)
1. Define proto message (+ request wrapper & RPC if remote invocation needed).
2. Regenerate protobuf code.
3. Implement & register handler (`RegisterMutation`).
4. Add client (HTTP/gRPC) endpoint.
5. Write unit + integration tests.
6. (Optional) Add to coverage test list and docs.
---
## High-Level Data Flow Diagram (Text)
```
Client -> HTTP Handler -> SyncedPool -> (local?) -> Registry -> Grain State
\-> (remote?) -> RemoteGrainGRPC -> gRPC -> Remote CartActor -> Registry -> Grain
ControlPlane: Discovery Events <-> Negotiation/Ping <-> SyncedPool state (ring determines ownership)
```
---
## Troubleshooting
| Symptom | Likely Cause | Action |
|---------|--------------|--------|
| New cart every request | Secure cookie over plain HTTP or not sending cookie jar | Disable Secure locally or use HTTPS & proper curl `-b` |
| Unsupported mutation error | Missing registry handler | Add `RegisterMutation` for that proto |
| Ownership imbalance | Ring host distribution skew or rapid host churn | Examine `cart_ring_host_share`, `cart_ring_hosts`, and logs for host add/remove; rebalance or investigate instability |
| Remote mutation latency | Network / serialization overhead | Consider batching or colocating hot carts |
| Checkout returns 500 | Klarna call failed | Inspect logs; no grain state mutated |
---

245
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@@ -1,245 +0,0 @@
# TODO / Roadmap
A living roadmap for improving the cart actor system. Focus areas:
1. Reliability & correctness
2. Simplicity of mutation & ownership flows
3. Developer experience (DX)
4. Operability (observability, tracing, metrics)
5. Performance & scalability
6. Security & multi-tenant readiness
---
## 1. Immediate Next Steps (High-Leverage)
| Priority | Task | Goal | Effort | Owner | Notes |
|----------|------|------|--------|-------|-------|
| P0 | Add mutation registry coverage test | Ensure no unregistered mutations silently fail | S | | Failing fast in CI |
| P0 | Add decodeJSON helper + 400 mapping for EOF | Reduce noisy 500 logs | S | | Improves client API clarity |
| P0 | Regenerate protos & prune unused messages (CreateCheckoutOrder, Checkout RPC remnants) | Eliminate dead types | S | | Avoid confusion |
| P0 | Add integration test: multi-node ownership negotiation | Validate quorum logic | M | | Spin up 23 nodes ephemeral |
| P1 | Export Prometheus metrics for per-mutation counts & latency | Operability | M | | Wrap registry handlers |
| P1 | Add graceful shutdown ordering (Closing → wait for acks → stop gRPC) | Reduce in-flight mutation failures | S | | Add context cancellation |
| P1 | Add coverage for InitializeCheckout / OrderCreated flows | Checkout reliability | S | | Simulate Klarna stub |
| P2 | Add optional batching client (apply multiple mutations locally then persist) | Performance | M | | Only if needed |
---
## 2. Simplification Opportunities
### A. RemoteGrain Proxy Mapping
Current: manual switch building each RPC call.
Simplify by:
- Generating a thin client adapter from proto RPC descriptors (codegen).
- Or using a registry similar to mutation registry but for “outbound call constructors”.
Benefit: adding a new mutation = add proto + register server handler + register outbound invoker (no switch edits).
### B. Ownership Negotiation
Current: ad hoc quorum rule in `SyncedPool`.
Simplify:
- Introduce explicit `OwnershipLease{holder, expiresAt, version}`.
- Use monotonic version increment—reject stale ConfirmOwner replies.
- Optional: add randomized backoff to reduce thundering herd on contested cart ids.
### C. CartId Handling
Current: ephemeral 16-byte array with trimmed string semantics.
Simplify:
- Use ULID / UUIDv7 (time-ordered, collision-resistant) for easier external correlation.
- Provide helper `NewCartIdString()` and keep internal fixed-size if still desired.
### D. Mutation Signatures
Current: registry assumes `func(*CartGrain, *T) error`.
Extension option: allow pure transforms returning a delta struct (for audit/logging):
```
type MutationResult struct {
Changed bool
Events []interface{}
}
```
Only implement if auditing/event-sourcing reintroduced.
---
## 3. Developer Experience Improvements
| Task | Rationale | Approach |
|------|-----------|----------|
| Makefile targets: `make run-single`, `make run-multi N=3` | Faster local cluster spin-up | Docker compose or background “mini cluster” scripts |
| Template for new mutation (generator) | Reduce boilerplate | `go:generate` scanning proto for new RPCs |
| Lint config (golangci-lint) | Catch subtle issues early | Add `.golangci.yml` |
| Pre-commit hook for proto regeneration check | Avoid stale generated code | Script compares git diff after `make protogen` |
| Example client (Go + curl snippets auto-generated) | Onboarding | Codegen a markdown from proto comments |
---
## 4. Observability / Metrics / Tracing
| Area | Metric / Trace | Notes |
|------|----------------|-------|
| Mutation registry | `cart_mutations_total{type,success}`; duration histogram | Wrap handler |
| Ownership negotiation | `cart_ownership_attempts_total{result}` | result=accepted,rejected,timeout |
| Remote latency | `cart_remote_mutation_seconds{method}` | Use client interceptors |
| Pings | `cart_remote_missed_pings_total{host}` | Already count, expose |
| Checkout flow | `checkout_attempts_total`, `checkout_failures_total` | Differentiate Klarna vs internal errors |
| Tracing | Span: HTTP handler → SyncedPool.Apply → (Remote?) gRPC → mutation handler | Add OpenTelemetry instrumentation |
---
## 5. Performance & Scalability
| Concern | Idea | Trade-Off |
|---------|------|-----------|
| High mutation rate on single cart | Introduce optional mutation queue (serialize explicitly) | Slight latency increase per op |
| Remote call overhead | Add client-side gRPC pooling & per-host circuit breaker | Complexity vs resilience |
| TTL purge efficiency | Use min-heap or timing wheel instead of slice scan | More code, better big-N performance |
| Batch network latency | Add `BatchMutate` RPC (list of mutations applied atomically) | Lost single-op simplicity |
---
## 6. Reliability Features
| Feature | Description | Priority |
|---------|-------------|----------|
| Lease fencing token | Include `ownership_version` in all remote mutate requests | M |
| Retry policy | Limited retry for transient network errors (idempotent mutations only) | L |
| Dead host reconciliation | On host removal, proactively attempt re-acquire of its carts | M |
| Drain mode | Node marks itself “draining” → refuses new ownership claims | M |
---
## 7. Security & Hardening
| Area | Next Step | Detail |
|------|-----------|--------|
| Transport | mTLS on gRPC | Use SPIFFE IDs or simple CA |
| AuthN/AuthZ | Interceptor enforcing service token | Inject metadata header |
| Input validation | Strengthen JSON decode responses | Disallow unknown fields globally |
| Rate limiting | Per-IP / per-cart throttling | Guard hotspot abuse |
| Multi-tenancy | Tenant id dimension in cart id or metadata | Partition metrics & ownership |
---
## 8. Testing Strategy Enhancements
| Gap | Improvement |
|-----|------------|
| No multi-node integration test in CI | Spin ephemeral in-process servers on randomized ports |
| Mutation regression | Table-driven tests auto-discover handlers via registry |
| Ownership race | Stress test: concurrent Apply on same new cart id from N goroutines |
| Checkout external dependency | Klarna mock server (HTTptest) + deterministic responses |
| Fuzzing | Fuzz `BuildCheckoutOrderPayload` & mutation handlers for panics |
---
## 9. Cleanup / Tech Debt
| Item | Action |
|------|--------|
| Remove deprecated proto remnants (CreateCheckoutOrder, Checkout RPC) | Delete & regenerate |
| Consolidate duplicate tax computations | Single helper with tax config |
| Delivery price hard-coded (4900) | Config or pricing strategy interface |
| Mixed naming (camel vs snake JSON historically) | Provide stable external API doc; accept old forms if needed |
| Manual remote mutation switch (if still present) | Replace with generated outbound registry |
| Mixed error responses (string bodies) | Standardize JSON: `{ "error": "...", "code": 400 }` |
---
## 10. Potential Future Features
| Feature | Value | Complexity |
|---------|-------|------------|
| Streaming `WatchState` RPC | Real-time cart updates for clients | Medium |
| Event sourcing / audit log | Replay, analytics, debugging | High |
| Promotion / coupon engine plugin | Business extensibility | Medium |
| Partial cart reservation / inventory lock | Stock accuracy under concurrency | High |
| Multi-currency pricing | Globalization | Medium |
| GraphQL facade | Client flexibility | Medium |
---
## 11. Suggested Prioritized Backlog (Condensed)
1. Coverage test + decode error mapping (P0)
2. Proto regeneration & cleanup (P0)
3. Metrics wrapper for registry (P1)
4. Multi-node ownership integration test (P1)
5. Delivery pricing abstraction (P2)
6. Lease version in remote RPCs (P2)
7. BatchMutate evaluation (P3)
8. TLS / auth hardening (P3) if going multi-tenant/public
9. Event sourcing (Evaluate after stability) (P4)
---
## 12. Simplifying the Developer Workflow
| Pain | Simplifier |
|------|------------|
| Manual mutation boilerplate | Code generator for registry stubs |
| Forgetting totals | Enforce WithTotals lint: fail if mutation touches items/deliveries without flag |
| Hard to inspect remote ownership | `/internal/ownership` debug endpoint (JSON of local + remoteIndex) |
| Hard to see mutation timings | Add `?debug=latency` header to return per-mutation durations |
| Cookie dev confusion (Secure flag) | Env var: `DEV_INSECURE_COOKIES=1` |
---
## 13. Example: Mutation Codegen Sketch (Future)
Input: cart_actor.proto
Output: `mutation_auto.go`
- Detect messages used in RPC wrappers (e.g., `AddItemRequest` → payload field).
- Generate `RegisterMutation` template if handler not found.
- Mark with `// TODO implement logic`.
---
## 14. Risk / Impact Matrix (Abbreviated)
| Change | Risk | Mitigation |
|--------|------|-----------|
| Replace remote switch with registry | Possible missing registration → runtime error | Coverage test gating CI |
| Lease introduction | Split-brain if version mishandled | Increment + assert monotonic; test race |
| BatchMutate | Large atomic operations starving others | Size limits & fair scheduling |
| Event sourcing | Storage + replay complexity | Start with append-only log + compaction job |
---
## 15. Contributing Workflow (Proposed)
1. Add / modify proto → run `make protogen`
2. Implement mutation logic → add `RegisterMutation` invocation
3. Add/Update tests (unit + integration)
4. Run `make verify` (lint, test, coverage, proto diff)
5. Open PR (template auto-checklist referencing this TODO)
6. Merge requires green CI + coverage threshold
---
## 16. Open Questions
| Question | Notes |
|----------|-------|
| Do we need sticky sessions for HTTP layer scaling? | Currently cart id routing suffices |
| Should deliveries prune invalid line references on SetCartRequest? | Inconsistency risk; add optional cleanup |
| Is checkout idempotency strict enough? | Multiple create vs update semantics |
| Add version field to CartState for optimistic concurrency? | Could enable external CAS writes |
---
## 17. Tracking
Mark any completed tasks with `[x]`:
- [ ] Coverage test
- [ ] Decode helper + 400 mapping
- [ ] Proto cleanup
- [ ] Registry metrics instrumentation
- [ ] Ownership multi-node test
- [ ] Lease versioning
- [ ] Delivery pricing abstraction
- [ ] TLS/mTLS internal
- [ ] BatchMutate design doc
---
_Last updated: roadmap draft refine after first metrics & scaling test run._

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@@ -1,40 +0,0 @@
### Add item to cart
POST https://cart.k6n.net/api/12345
Content-Type: application/json
{
"sku": "763281",
"quantity": 1
}
### Update quanity of item in cart
PUT https://cart.k6n.net/api/12345
Content-Type: application/json
{
"id": 1,
"quantity": 1
}
### Delete item from cart
DELETE https://cart.k6n.net/api/1002/1
### Set delivery
POST https://cart.k6n.net/api/1002/delivery
Content-Type: application/json
{
"provider": "postnord",
"items": []
}
### Get cart
GET https://cart.k6n.net/api/12345
### Remove delivery method
DELETE https://cart.k6n.net/api/12345/delivery/2

156
cart-grain.go Normal file
View File

@@ -0,0 +1,156 @@
package main
import (
"encoding/json"
"fmt"
"log"
"net/http"
"time"
messages "git.tornberg.me/go-cart-actor/proto"
"github.com/matst80/slask-finder/pkg/index"
)
type CartId [16]byte
func (id CartId) MarshalJSON() ([]byte, error) {
return json.Marshal(id.String())
}
func (id *CartId) UnmarshalJSON(data []byte) error {
var str string
err := json.Unmarshal(data, &str)
if err != nil {
return err
}
copy(id[:], []byte(str))
return nil
}
type CartItem struct {
Sku string `json:"sku"`
Name string `json:"name"`
Price int64 `json:"price"`
Image string `json:"image"`
}
type CartGrain struct {
storageMessages []Message
Id CartId `json:"id"`
Items []CartItem `json:"items"`
TotalPrice int64 `json:"totalPrice"`
}
type Grain interface {
GetId() CartId
HandleMessage(message *Message, isReplay bool) ([]byte, error)
}
func (c *CartGrain) GetId() CartId {
return c.Id
}
func (c *CartGrain) GetLastChange() int64 {
if len(c.storageMessages) == 0 {
return 0
}
return *c.storageMessages[len(c.storageMessages)-1].TimeStamp
}
func getItemData(sku string) (*messages.AddItem, error) {
res, err := http.Get("https://slask-finder.tornberg.me/api/get/" + sku)
if err != nil {
return nil, err
}
defer res.Body.Close()
var item index.DataItem
err = json.NewDecoder(res.Body).Decode(&item)
if err != nil {
return nil, err
}
price := item.GetPrice()
if price == 0 {
priceField, ok := item.GetFields()[4]
if ok {
priceFloat, ok := priceField.(float64)
if !ok {
price, ok = priceField.(int)
if !ok {
return nil, fmt.Errorf("invalid price type")
}
} else {
price = int(priceFloat)
}
}
}
return &messages.AddItem{
Quantity: 1,
Price: int64(price),
Sku: sku,
Name: item.Title,
Image: item.Img,
}, nil
}
func (c *CartGrain) AddItem(sku string) ([]byte, error) {
cartItem, err := getItemData(sku)
if err != nil {
return nil, err
}
return c.HandleMessage(&Message{
Type: 2,
Content: cartItem,
}, false)
}
func (c *CartGrain) GetStorageMessage(since int64) []StorableMessage {
ret := make([]StorableMessage, 0)
for _, message := range c.storageMessages {
if *message.TimeStamp > since {
ret = append(ret, message)
}
}
return ret
}
func (c *CartGrain) HandleMessage(message *Message, isReplay bool) ([]byte, error) {
log.Printf("Handling message %d", message.Type)
if message.TimeStamp == nil {
now := time.Now().Unix()
message.TimeStamp = &now
}
var err error
switch message.Type {
case AddRequestType:
msg, ok := message.Content.(*messages.AddRequest)
if !ok {
err = fmt.Errorf("invalid content type")
} else {
return c.AddItem(msg.Sku)
}
case AddItemType:
msg, ok := message.Content.(*messages.AddItem)
if !ok {
err = fmt.Errorf("invalid content type")
} else {
c.Items = append(c.Items, CartItem{
Sku: msg.Sku,
Name: msg.Name,
Price: msg.Price,
Image: msg.Image,
})
c.TotalPrice += msg.Price
}
default:
err = fmt.Errorf("unknown message type")
}
if err != nil {
return nil, err
}
if !isReplay {
c.storageMessages = append(c.storageMessages, *message)
}
return json.Marshal(c)
}

View File

@@ -1,439 +0,0 @@
package main
import (
"bufio"
"encoding/json"
"errors"
"fmt"
"io"
"io/fs"
"log"
"net/http"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"time"
"git.k6n.net/go-cart-actor/pkg/actor"
"git.k6n.net/go-cart-actor/pkg/cart"
"git.k6n.net/go-cart-actor/pkg/checkout"
"google.golang.org/protobuf/proto"
)
type FileServer struct {
// Define fields here
dataDir string
checkoutDataDir string
storage actor.LogStorage[cart.CartGrain]
checkoutStorage actor.LogStorage[checkout.CheckoutGrain]
}
func NewFileServer(dataDir string, checkoutDataDir string, storage actor.LogStorage[cart.CartGrain], checkoutStorage actor.LogStorage[checkout.CheckoutGrain]) *FileServer {
return &FileServer{
dataDir: dataDir,
checkoutDataDir: checkoutDataDir,
storage: storage,
checkoutStorage: checkoutStorage,
}
}
func isValidId(id string) (uint64, bool) {
if nr, err := strconv.ParseUint(id, 10, 64); err == nil {
return nr, true
}
if nr, ok := cart.ParseCartId(id); ok {
return uint64(nr), true
}
return 0, false
}
func isValidFileId(name string) (uint64, bool) {
parts := strings.Split(name, ".")
if len(parts) > 1 && parts[1] == "events" {
idStr := parts[0]
return isValidId(idStr)
}
return 0, false
}
// func AccessTime(info os.FileInfo) (time.Time, bool) {
// switch stat := info.Sys().(type) {
// case *syscall.Stat_t:
// // Linux: Atim; macOS/BSD: Atimespec
// // Use reflection or build tags if naming differs.
// // Linux:
// if stat.Atim.Sec != 0 || stat.Atim.Nsec != 0 {
// return time.Unix(int64(stat.Atim.Sec), int64(stat.Atim.Nsec)), true
// }
// // macOS/BSD example (uncomment if needed):
// //return time.Unix(int64(stat.Atimespec.Sec), int64(stat.Atimespec.Nsec)), true
// }
// return time.Time{}, false
// }
func appendFileInfo(info fs.FileInfo, out *CartFileInfo) *CartFileInfo {
//sys := info.Sys()
//fmt.Printf("sys type %T", sys)
out.Size = info.Size()
out.Modified = info.ModTime()
//out.Accessed, _ = AccessTime(info)
return out
}
func appendCheckoutFileInfo(info fs.FileInfo, out *CheckoutFileInfo) *CheckoutFileInfo {
out.Size = info.Size()
out.Modified = info.ModTime()
return out
}
// var cartFileRe = regexp.MustCompile(`^(\d+)\.events\.log$`)
func listCartFiles(dir string) ([]*CartFileInfo, error) {
entries, err := os.ReadDir(dir)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
return []*CartFileInfo{}, nil
}
return nil, err
}
out := make([]*CartFileInfo, 0)
for _, e := range entries {
if e.IsDir() {
continue
}
id, valid := isValidFileId(e.Name())
if !valid {
continue
}
info, err := e.Info()
if err != nil {
continue
}
info.Sys()
out = append(out, appendFileInfo(info, &CartFileInfo{
ID: fmt.Sprintf("%d", id),
CartId: cart.CartId(id),
}))
}
return out, nil
}
func listCheckoutFiles(dir string) ([]*CheckoutFileInfo, error) {
entries, err := os.ReadDir(dir)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
return []*CheckoutFileInfo{}, nil
}
return nil, err
}
out := make([]*CheckoutFileInfo, 0)
for _, e := range entries {
if e.IsDir() {
continue
}
id, valid := isValidFileId(e.Name())
if !valid {
continue
}
info, err := e.Info()
if err != nil {
continue
}
out = append(out, appendCheckoutFileInfo(info, &CheckoutFileInfo{
ID: fmt.Sprintf("%d", id),
CheckoutId: checkout.CheckoutId(id),
}))
}
return out, nil
}
func readRawLogLines(path string) ([]json.RawMessage, error) {
fh, err := os.Open(path)
if err != nil {
return nil, err
}
defer fh.Close()
lines := make([]json.RawMessage, 0, 64)
s := bufio.NewScanner(fh)
// increase buffer to handle larger JSON lines
buf := make([]byte, 0, 1024*1024)
s.Buffer(buf, 1024*1024)
for s.Scan() {
line := s.Bytes()
if line == nil {
continue
}
lines = append(lines, line)
}
if err := s.Err(); err != nil {
return nil, err
}
return lines, nil
}
func writeJSON(w http.ResponseWriter, status int, v any) {
w.Header().Set("Content-Type", "application/json")
w.Header().Set("Cache-Control", "no-cache")
w.WriteHeader(status)
_ = json.NewEncoder(w).Encode(v)
}
func (fs *FileServer) CartsHandler(w http.ResponseWriter, r *http.Request) {
list, err := listCartFiles(fs.dataDir)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
return
}
// sort by modified desc
sort.Slice(list, func(i, j int) bool { return list[i].Modified.After(list[j].Modified) })
writeJSON(w, http.StatusOK, map[string]any{
"count": len(list),
"carts": list,
})
}
func (fs *FileServer) CheckoutsHandler(w http.ResponseWriter, r *http.Request) {
list, err := listCheckoutFiles(fs.checkoutDataDir)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
return
}
// sort by modified desc
sort.Slice(list, func(i, j int) bool { return list[i].Modified.After(list[j].Modified) })
writeJSON(w, http.StatusOK, map[string]any{
"count": len(list),
"checkouts": list,
})
}
func (fs *FileServer) PromotionsHandler(w http.ResponseWriter, r *http.Request) {
fileName := filepath.Join(fs.dataDir, "promotions.json")
if r.Method == http.MethodGet {
file, err := os.Open(fileName)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
return
}
defer file.Close()
io.Copy(w, file)
return
}
if r.Method == http.MethodPost {
file, err := os.Create(fileName)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
return
}
defer file.Close()
io.Copy(file, r.Body)
return
}
w.WriteHeader(http.StatusMethodNotAllowed)
}
func (fs *FileServer) VoucherHandler(w http.ResponseWriter, r *http.Request) {
fileName := filepath.Join(fs.dataDir, "vouchers.json")
if r.Method == http.MethodGet {
file, err := os.Open(fileName)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
return
}
defer file.Close()
io.Copy(w, file)
return
}
if r.Method == http.MethodPost {
file, err := os.Create(fileName)
if err != nil {
writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
return
}
defer file.Close()
io.Copy(file, r.Body)
return
}
w.WriteHeader(http.StatusMethodNotAllowed)
}
func (fs *FileServer) PromotionPartHandler(w http.ResponseWriter, r *http.Request) {
idStr := r.PathValue("id")
if idStr == "" {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintf(w, "missing id")
return
}
_, ok := isValidId(idStr)
if !ok {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintf(w, "invalid id %s", idStr)
return
}
w.WriteHeader(http.StatusNotImplemented)
}
type JsonError struct {
Error string `json:"error"`
}
func acceptAll(_ proto.Message, _ int, _ time.Time) bool {
return true
}
func acceptUntilIndex(maxIndex int) func(msg proto.Message, index int, when time.Time) bool {
return func(msg proto.Message, index int, when time.Time) bool {
return index < maxIndex
}
}
func acceptUntilTimestamp(until time.Time) func(msg proto.Message, index int, when time.Time) bool {
return func(msg proto.Message, index int, when time.Time) bool {
return when.Before(until)
}
}
func (fs *FileServer) CartHandler(w http.ResponseWriter, r *http.Request) {
idStr := r.PathValue("id")
if idStr == "" {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "missing id"})
return
}
id, ok := isValidId(idStr)
if !ok {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid id"})
return
}
// parse query parameters for filtering
query := r.URL.Query()
filterFunction := acceptAll
if maxIndexStr := query.Get("maxIndex"); maxIndexStr != "" {
log.Printf("filter maxIndex: %s", maxIndexStr)
maxIndex, err := strconv.Atoi(maxIndexStr)
if err != nil {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid maxIndex"})
return
}
filterFunction = acceptUntilIndex(maxIndex)
} else if untilStr := query.Get("until"); untilStr != "" {
log.Printf("filter until: %s", untilStr)
until, err := time.Parse(time.RFC3339, untilStr)
if err != nil {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid until timestamp"})
return
}
filterFunction = acceptUntilTimestamp(until)
}
// reconstruct state from event log if present
grain := cart.NewCartGrain(id, time.Now())
err := fs.storage.LoadEventsFunc(r.Context(), id, grain, filterFunction)
if err != nil {
writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
return
}
path := filepath.Join(fs.dataDir, fmt.Sprintf("%d.events.log", id))
info, err := os.Stat(path)
if err != nil && errors.Is(err, os.ErrNotExist) {
writeJSON(w, http.StatusNotFound, JsonError{Error: "cart not found"})
return
} else if err != nil {
writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
return
}
lines, err := readRawLogLines(path)
if err != nil {
writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
return
}
writeJSON(w, http.StatusOK, map[string]any{
"id": id,
"cartId": cart.CartId(id).String(),
"state": grain,
"mutations": lines,
"meta": map[string]any{
"size": info.Size(),
"modified": info.ModTime(),
"path": path,
},
})
}
func (fs *FileServer) CheckoutHandler(w http.ResponseWriter, r *http.Request) {
idStr := r.PathValue("id")
if idStr == "" {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "missing id"})
return
}
id, ok := isValidId(idStr)
if !ok {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid id"})
return
}
// parse query parameters for filtering
query := r.URL.Query()
filterFunction := acceptAll
if maxIndexStr := query.Get("maxIndex"); maxIndexStr != "" {
log.Printf("filter maxIndex: %s", maxIndexStr)
maxIndex, err := strconv.Atoi(maxIndexStr)
if err != nil {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid maxIndex"})
return
}
filterFunction = acceptUntilIndex(maxIndex)
} else if untilStr := query.Get("until"); untilStr != "" {
log.Printf("filter until: %s", untilStr)
until, err := time.Parse(time.RFC3339, untilStr)
if err != nil {
writeJSON(w, http.StatusBadRequest, JsonError{Error: "invalid until timestamp"})
return
}
filterFunction = acceptUntilTimestamp(until)
}
// reconstruct state from event log if present
grain := checkout.NewCheckoutGrain(id, cart.CartId(id), 0, time.Now(), nil)
err := fs.checkoutStorage.LoadEventsFunc(r.Context(), id, grain, filterFunction)
if err != nil {
writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
return
}
path := filepath.Join(fs.checkoutDataDir, fmt.Sprintf("%d.events.log", id))
info, err := os.Stat(path)
if err != nil && errors.Is(err, os.ErrNotExist) {
writeJSON(w, http.StatusNotFound, JsonError{Error: "checkout not found"})
return
} else if err != nil {
writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
return
}
lines, err := readRawLogLines(path)
if err != nil {
writeJSON(w, http.StatusInternalServerError, JsonError{Error: err.Error()})
return
}
writeJSON(w, http.StatusOK, map[string]any{
"id": id,
"checkoutId": checkout.CheckoutId(id).String(),
"state": grain,
"mutations": lines,
"meta": map[string]any{
"size": info.Size(),
"modified": info.ModTime(),
"path": path,
},
})
}

View File

@@ -1,89 +0,0 @@
package main
import (
"math/rand"
"os"
"path/filepath"
"testing"
"time"
"git.k6n.net/go-cart-actor/pkg/cart"
)
// TestAppendFileInfoRandomProjectFile picks a random existing .go source file in the
// repository (from a small curated list to keep the test hermetic) and verifies
// that appendFileInfo populates Size, Modified and System without mutating the
// identity fields (ID, CartId). The randomness is only to satisfy the requirement
// of using "a random project file"; the test behavior is deterministic enough for
// CI because all chosen files are expected to exist.
func TestAppendFileInfoRandomProjectFile(t *testing.T) {
candidates := []string{
filepath.FromSlash("../../pkg/cart/cart_id.go"),
filepath.FromSlash("../../pkg/actor/grain.go"),
filepath.FromSlash("../../cmd/cart/main.go"),
}
// Pick one at random.
rand.Seed(time.Now().UnixNano())
path := candidates[rand.Intn(len(candidates))]
info, err := os.Stat(path)
if err != nil {
t.Fatalf("stat failed for %s: %v", path, err)
}
// Pre-populate a CartFileInfo with identity fields.
origID := "test-id"
origCartId := cart.CartId(12345)
cf := &CartFileInfo{ID: origID, CartId: origCartId}
// Call function under test.
got := appendFileInfo(info, cf)
if got != cf {
t.Fatalf("appendFileInfo should return the same pointer instance")
}
if cf.ID != origID {
t.Fatalf("ID mutated: expected %q got %q", origID, cf.ID)
}
if cf.CartId != origCartId {
t.Fatalf("CartId mutated: expected %v got %v", origCartId, cf.CartId)
}
if cf.Size != info.Size() {
t.Fatalf("Size mismatch: expected %d got %d", info.Size(), cf.Size)
}
mod := info.ModTime()
// Allow small clock skew / coarse timestamp truncation.
if cf.Modified.Before(mod.Add(-2*time.Second)) || cf.Modified.After(mod.Add(2*time.Second)) {
t.Fatalf("Modified not within expected range: want ~%v got %v", mod, cf.Modified)
}
}
// TestAppendFileInfoTempFile creates a temporary file to ensure Size and Modified
// are updated for a freshly written file with known content length.
func TestAppendFileInfoTempFile(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "temp.events.log")
content := []byte("hello world\nanother line\n")
if err := os.WriteFile(path, content, 0644); err != nil {
t.Fatalf("write temp file failed: %v", err)
}
info, err := os.Stat(path)
if err != nil {
t.Fatalf("stat temp file failed: %v", err)
}
cf := &CartFileInfo{ID: "temp", CartId: cart.CartId(0)}
appendFileInfo(info, cf)
if cf.Size != int64(len(content)) {
t.Fatalf("expected Size %d got %d", len(content), cf.Size)
}
if cf.Modified.IsZero() {
t.Fatalf("Modified should be set")
}
}

View File

@@ -1,248 +0,0 @@
package main
import (
"bufio"
"crypto/sha1"
"encoding/base64"
"encoding/binary"
"io"
"net"
"net/http"
"strings"
"time"
)
// Hub manages websocket clients and broadcasts messages to them.
type Hub struct {
register chan *Client
unregister chan *Client
broadcast chan []byte
clients map[*Client]bool
}
// Client represents a single websocket client connection.
type Client struct {
hub *Hub
conn net.Conn
send chan []byte
}
// NewHub constructs a new Hub instance.
func NewHub() *Hub {
return &Hub{
register: make(chan *Client),
unregister: make(chan *Client),
broadcast: make(chan []byte, 1024),
clients: make(map[*Client]bool),
}
}
// Run starts the hub event loop.
func (h *Hub) Run() {
for {
select {
case c := <-h.register:
h.clients[c] = true
case c := <-h.unregister:
if _, ok := h.clients[c]; ok {
delete(h.clients, c)
close(c.send)
_ = c.conn.Close()
}
case msg := <-h.broadcast:
for c := range h.clients {
select {
case c.send <- msg:
default:
// Client is slow or dead; drop it.
delete(h.clients, c)
close(c.send)
_ = c.conn.Close()
}
}
}
}
}
// computeAccept computes the Sec-WebSocket-Accept header value.
func computeAccept(key string) string {
const magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
h := sha1.New()
h.Write([]byte(key + magic))
return base64.StdEncoding.EncodeToString(h.Sum(nil))
}
// ServeWS upgrades the HTTP request to a WebSocket connection and registers a client.
func (h *Hub) ServeWS(w http.ResponseWriter, r *http.Request) {
if !strings.Contains(strings.ToLower(r.Header.Get("Connection")), "upgrade") || strings.ToLower(r.Header.Get("Upgrade")) != "websocket" {
http.Error(w, "upgrade required", http.StatusBadRequest)
return
}
key := r.Header.Get("Sec-WebSocket-Key")
if key == "" {
http.Error(w, "missing Sec-WebSocket-Key", http.StatusBadRequest)
return
}
accept := computeAccept(key)
hj, ok := w.(http.Hijacker)
if !ok {
http.Error(w, "websocket not supported", http.StatusInternalServerError)
return
}
conn, buf, err := hj.Hijack()
if err != nil {
return
}
// Write the upgrade response
response := "HTTP/1.1 101 Switching Protocols\r\n" +
"Upgrade: websocket\r\n" +
"Connection: Upgrade\r\n" +
"Sec-WebSocket-Accept: " + accept + "\r\n" +
"\r\n"
if _, err := buf.WriteString(response); err != nil {
_ = conn.Close()
return
}
if err := buf.Flush(); err != nil {
_ = conn.Close()
return
}
client := &Client{
hub: h,
conn: conn,
send: make(chan []byte, 256),
}
h.register <- client
go client.writePump()
go client.readPump()
}
// writeWSFrame writes a single WebSocket frame to the writer.
func writeWSFrame(w io.Writer, opcode byte, payload []byte) error {
// FIN set, opcode as provided
header := []byte{0x80 | (opcode & 0x0F)}
l := len(payload)
switch {
case l < 126:
header = append(header, byte(l))
case l <= 65535:
ext := make([]byte, 2)
binary.BigEndian.PutUint16(ext, uint16(l))
header = append(header, 126)
header = append(header, ext...)
default:
ext := make([]byte, 8)
binary.BigEndian.PutUint64(ext, uint64(l))
header = append(header, 127)
header = append(header, ext...)
}
if _, err := w.Write(header); err != nil {
return err
}
if l > 0 {
if _, err := w.Write(payload); err != nil {
return err
}
}
return nil
}
// readPump handles control frames from the client and discards other incoming frames.
// This server is broadcast-only to clients.
func (c *Client) readPump() {
defer func() {
c.hub.unregister <- c
}()
reader := bufio.NewReader(c.conn)
for {
// Read first two bytes
b1, err := reader.ReadByte()
if err != nil {
return
}
b2, err := reader.ReadByte()
if err != nil {
return
}
opcode := b1 & 0x0F
masked := (b2 & 0x80) != 0
length := int64(b2 & 0x7F)
if length == 126 {
ext := make([]byte, 2)
if _, err := io.ReadFull(reader, ext); err != nil {
return
}
length = int64(binary.BigEndian.Uint16(ext))
} else if length == 127 {
ext := make([]byte, 8)
if _, err := io.ReadFull(reader, ext); err != nil {
return
}
length = int64(binary.BigEndian.Uint64(ext))
}
var maskKey [4]byte
if masked {
if _, err := io.ReadFull(reader, maskKey[:]); err != nil {
return
}
}
// Handle Ping -> Pong
if opcode == 0x9 && length <= 125 {
payload := make([]byte, length)
if _, err := io.ReadFull(reader, payload); err != nil {
return
}
// Unmask if masked
if masked {
for i := int64(0); i < length; i++ {
payload[i] ^= maskKey[i%4]
}
}
_ = writeWSFrame(c.conn, 0xA, payload) // best-effort pong
continue
}
// Close frame
if opcode == 0x8 {
// Drain payload if any, then exit
if _, err := io.CopyN(io.Discard, reader, length); err != nil {
return
}
return
}
// For other frames, just discard payload
if _, err := io.CopyN(io.Discard, reader, length); err != nil {
return
}
}
}
// writePump sends queued messages to the client and pings periodically to keep the connection alive.
func (c *Client) writePump() {
ticker := time.NewTicker(30 * time.Second)
defer func() {
ticker.Stop()
_ = c.conn.Close()
}()
for {
select {
case msg, ok := <-c.send:
if !ok {
// try to send close frame
_ = writeWSFrame(c.conn, 0x8, nil)
return
}
if err := writeWSFrame(c.conn, 0x1, msg); err != nil {
return
}
case <-ticker.C:
// Send a ping to keep connections alive behind proxies
_ = writeWSFrame(c.conn, 0x9, []byte("ping"))
}
}
}

View File

@@ -1,210 +0,0 @@
package main
import (
"context"
"encoding/json"
"errors"
"log"
"net/http"
"os"
"time"
actor "git.k6n.net/go-cart-actor/pkg/actor"
"git.k6n.net/go-cart-actor/pkg/cart"
"git.k6n.net/go-cart-actor/pkg/checkout"
"github.com/matst80/go-redis-inventory/pkg/inventory"
"github.com/matst80/slask-finder/pkg/messaging"
amqp "github.com/rabbitmq/amqp091-go"
"github.com/redis/go-redis/v9"
)
type CartFileInfo struct {
ID string `json:"id"`
CartId cart.CartId `json:"cartId"`
Size int64 `json:"size"`
Modified time.Time `json:"modified"`
}
type CheckoutFileInfo struct {
ID string `json:"id"`
CheckoutId checkout.CheckoutId `json:"checkoutId"`
Size int64 `json:"size"`
Modified time.Time `json:"modified"`
}
func envOrDefault(key, def string) string {
if v := os.Getenv(key); v != "" {
return v
}
return def
}
func startMutationConsumer(ctx context.Context, conn *amqp.Connection, hub *Hub) error {
ch, err := conn.Channel()
if err != nil {
_ = conn.Close()
return err
}
msgs, err := messaging.DeclareBindAndConsume(ch, "cart", "mutation")
if err != nil {
_ = ch.Close()
return err
}
go func() {
defer ch.Close()
for {
select {
case <-ctx.Done():
return
case m, ok := <-msgs:
if !ok {
log.Fatalf("connection closed")
continue
}
// Log and broadcast to all websocket clients
log.Printf("mutation event: %s", string(m.Body))
if hub != nil {
select {
case hub.broadcast <- m.Body:
default:
// if hub queue is full, drop to avoid blocking
}
}
if err := m.Ack(false); err != nil {
log.Printf("error acknowledging message: %v", err)
}
}
}
}()
return nil
}
var redisAddress = os.Getenv("REDIS_ADDRESS")
var redisPassword = os.Getenv("REDIS_PASSWORD")
func main() {
dataDir := envOrDefault("DATA_DIR", "data")
addr := envOrDefault("ADDR", ":8080")
amqpURL := os.Getenv("AMQP_URL")
rdb := redis.NewClient(&redis.Options{
Addr: redisAddress,
Password: redisPassword,
DB: 0,
})
inventoryService, err := inventory.NewRedisInventoryService(rdb)
if err != nil {
log.Fatalf("Error creating inventory service: %v\n", err)
}
_ = os.MkdirAll(dataDir, 0755)
reg := cart.NewCartMultationRegistry(cart.NewCartMutationContext(nil))
diskStorage := actor.NewDiskStorage[cart.CartGrain](dataDir, reg)
checkoutDataDir := envOrDefault("CHECKOUT_DATA_DIR", "checkout-data")
_ = os.MkdirAll(checkoutDataDir, 0755)
regCheckout := checkout.NewCheckoutMutationRegistry(checkout.NewCheckoutMutationContext())
diskStorageCheckout := actor.NewDiskStorage[checkout.CheckoutGrain](checkoutDataDir, regCheckout)
fs := NewFileServer(dataDir, checkoutDataDir, diskStorage, diskStorageCheckout)
hub := NewHub()
go hub.Run()
mux := http.NewServeMux()
mux.HandleFunc("GET /carts", fs.CartsHandler)
mux.HandleFunc("GET /cart/{id}", fs.CartHandler)
mux.HandleFunc("GET /checkouts", fs.CheckoutsHandler)
mux.HandleFunc("GET /checkout/{id}", fs.CheckoutHandler)
mux.HandleFunc("PUT /inventory/{locationId}/{sku}", func(w http.ResponseWriter, r *http.Request) {
inventoryLocationId := inventory.LocationID(r.PathValue("locationId"))
inventorySku := inventory.SKU(r.PathValue("sku"))
pipe := rdb.Pipeline()
var payload struct {
Quantity int64 `json:"quantity"`
}
err := json.NewDecoder(r.Body).Decode(&payload)
if err != nil {
http.Error(w, "invalid payload", http.StatusBadRequest)
return
}
inventoryService.UpdateInventory(r.Context(), pipe, inventorySku, inventoryLocationId, payload.Quantity)
_, err = pipe.Exec(r.Context())
if err != nil {
http.Error(w, "failed to update inventory", http.StatusInternalServerError)
return
}
err = inventoryService.SendInventoryChanged(r.Context(), inventorySku, inventoryLocationId)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
w.WriteHeader(http.StatusOK)
})
mux.HandleFunc("/promotions", fs.PromotionsHandler)
mux.HandleFunc("/vouchers", fs.VoucherHandler)
mux.HandleFunc("/promotion/{id}", fs.PromotionPartHandler)
mux.HandleFunc("/ws", hub.ServeWS)
mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte("ok"))
})
mux.HandleFunc("/readyz", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte("ok"))
})
mux.HandleFunc("/livez", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte("ok"))
})
// Global CORS middleware allowing all origins and handling preflight
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE, OPTIONS")
w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
w.Header().Set("Access-Control-Expose-Headers", "*")
if r.Method == http.MethodOptions {
w.WriteHeader(http.StatusNoContent)
return
}
mux.ServeHTTP(w, r)
})
srv := &http.Server{
Addr: addr,
Handler: handler,
ReadTimeout: 15 * time.Second,
WriteTimeout: 30 * time.Second,
IdleTimeout: 60 * time.Second,
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if amqpURL != "" {
conn, err := amqp.Dial(amqpURL)
if err != nil {
log.Fatalf("failed to connect to RabbitMQ: %v", err)
}
if err := startMutationConsumer(ctx, conn, hub); err != nil {
log.Printf("AMQP listener disabled: %v", err)
} else {
log.Printf("AMQP listener connected")
}
}
log.Printf("backoffice HTTP listening on %s (dataDir=%s)", addr, dataDir)
if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
log.Fatalf("http server error: %v", err)
}
// server stopped
}

View File

@@ -1,63 +0,0 @@
package main
import (
"log"
"git.k6n.net/go-cart-actor/pkg/discovery"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
)
func GetDiscovery() discovery.Discovery {
if podIp == "" {
return nil
}
config, kerr := rest.InClusterConfig()
if kerr != nil {
log.Fatalf("Error creating kubernetes client: %v\n", kerr)
}
client, err := kubernetes.NewForConfig(config)
if err != nil {
log.Fatalf("Error creating client: %v\n", err)
}
timeout := int64(30)
return discovery.NewK8sDiscovery(client, v1.ListOptions{
LabelSelector: "actor-pool=cart",
TimeoutSeconds: &timeout,
})
}
func UseDiscovery(pool discovery.DiscoveryTarget) {
go func(hw discovery.Discovery) {
if hw == nil {
log.Print("No discovery service available")
return
}
ch, err := hw.Watch()
if err != nil {
log.Printf("Discovery error: %v", err)
return
}
for evt := range ch {
if evt.Host == "" {
continue
}
switch evt.IsReady {
case false:
if pool.IsKnown(evt.Host) {
log.Printf("Host %s is not ready, removing", evt.Host)
pool.RemoveHost(evt.Host)
}
default:
if !pool.IsKnown(evt.Host) {
log.Printf("Discovered host %s", evt.Host)
pool.AddRemoteHost(evt.Host)
}
}
}
}(GetDiscovery())
}

View File

@@ -1,315 +0,0 @@
package main
import (
"context"
"fmt"
"log"
"net"
"net/http"
"net/http/pprof"
"os"
"os/signal"
"strings"
"time"
"git.k6n.net/go-cart-actor/pkg/actor"
"git.k6n.net/go-cart-actor/pkg/cart"
"git.k6n.net/go-cart-actor/pkg/promotions"
"git.k6n.net/go-cart-actor/pkg/proxy"
"git.k6n.net/go-cart-actor/pkg/voucher"
"github.com/matst80/go-redis-inventory/pkg/inventory"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/redis/go-redis/v9"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
)
var (
grainSpawns = promauto.NewCounter(prometheus.CounterOpts{
Name: "cart_grain_spawned_total",
Help: "The total number of spawned grains",
})
)
func init() {
os.Mkdir("data", 0755)
}
type App struct {
pool *actor.SimpleGrainPool[cart.CartGrain]
server *PoolServer
}
var podIp = os.Getenv("POD_IP")
var name = os.Getenv("POD_NAME")
var amqpUrl = os.Getenv("AMQP_URL")
var redisAddress = os.Getenv("REDIS_ADDRESS")
var redisPassword = os.Getenv("REDIS_PASSWORD")
func getCountryFromHost(host string) string {
if strings.Contains(strings.ToLower(host), "-no") {
return "no"
}
if strings.Contains(strings.ToLower(host), "-se") {
return "se"
}
return ""
}
type MutationContext struct {
VoucherService voucher.Service
}
type CartChangeEvent struct {
CartId cart.CartId `json:"cartId"`
Mutations []actor.ApplyResult `json:"mutations"`
}
func matchesSkuAndLocation(update inventory.InventoryResult, item cart.CartItem) bool {
if string(update.SKU) == item.Sku {
if update.LocationID == "se" && item.StoreId == nil {
return true
}
if item.StoreId == nil {
return false
}
if *item.StoreId == string(update.LocationID) {
return true
}
}
return false
}
func main() {
controlPlaneConfig := actor.DefaultServerConfig()
promotionData, err := promotions.LoadStateFile("data/promotions.json")
if err != nil {
log.Printf("Error loading promotions: %v\n", err)
}
log.Printf("loaded %d promotions", len(promotionData.State.Promotions))
inventoryPubSub := actor.NewPubSub[inventory.InventoryChange]()
// promotionService := promotions.NewPromotionService(nil)
rdb := redis.NewClient(&redis.Options{
Addr: redisAddress,
Password: redisPassword,
DB: 0,
})
inventoryService, err := inventory.NewRedisInventoryService(rdb)
if err != nil {
log.Fatalf("Error creating inventory service: %v\n", err)
}
inventoryReservationService, err := inventory.NewRedisCartReservationService(rdb)
if err != nil {
log.Fatalf("Error creating inventory reservation service: %v\n", err)
}
reg := cart.NewCartMultationRegistry(cart.NewCartMutationContext(inventoryReservationService))
reg.RegisterProcessor(
actor.NewMutationProcessor(func(ctx context.Context, g *cart.CartGrain) error {
_, span := tracer.Start(ctx, "Totals and promotions")
defer span.End()
g.UpdateTotals()
g.Version++
// promotionCtx := promotions.NewContextFromCart(g, promotions.WithNow(time.Now()), promotions.WithCustomerSegment("vip"))
// _, actions := promotionService.EvaluateAll(promotionData.State.Promotions, promotionCtx)
// for _, action := range actions {
// log.Printf("apply: %+v", action)
// g.UpdateTotals()
// }
return nil
}),
)
diskStorage := actor.NewDiskStorage[cart.CartGrain]("data", reg)
poolConfig := actor.GrainPoolConfig[cart.CartGrain]{
MutationRegistry: reg,
Storage: diskStorage,
Spawn: func(ctx context.Context, id uint64) (actor.Grain[cart.CartGrain], error) {
_, span := tracer.Start(ctx, fmt.Sprintf("Spawn cart id %d", id))
defer span.End()
grainSpawns.Inc()
ret := cart.NewCartGrain(id, time.Now())
// Set baseline lastChange at spawn; replay may update it to last event timestamp.
inventoryPubSub.Subscribe(ret.HandleInventoryChange)
err := diskStorage.LoadEvents(ctx, id, ret)
if err == nil && inventoryService != nil {
refs := make([]*inventory.InventoryReference, 0)
for _, item := range ret.Items {
refs = append(refs, &inventory.InventoryReference{
SKU: inventory.SKU(item.Sku),
LocationID: getLocationId(item),
})
}
_, span := tracer.Start(ctx, "update inventory")
defer span.End()
res, err := inventoryService.GetInventoryBatch(ctx, refs...)
if err != nil {
log.Printf("unable to update inventory %v", err)
} else {
for _, update := range res {
for _, item := range ret.Items {
if matchesSkuAndLocation(update, *item) && update.Quantity != uint32(item.Stock) {
// maybe apply an update to give visibility to the cart
item.Stock = uint16(update.Quantity)
}
}
}
}
}
return ret, err
},
Destroy: func(grain actor.Grain[cart.CartGrain]) error {
cart, err := grain.GetCurrentState()
if err != nil {
return err
}
inventoryPubSub.Unsubscribe(cart.HandleInventoryChange)
return nil
},
SpawnHost: func(host string) (actor.Host[cart.CartGrain], error) {
return proxy.NewRemoteHost[cart.CartGrain](host)
},
TTL: 5 * time.Minute,
PoolSize: 2 * 65535,
Hostname: podIp,
}
pool, err := actor.NewSimpleGrainPool(poolConfig)
if err != nil {
log.Fatalf("Error creating cart pool: %v\n", err)
}
syncedServer := NewPoolServer(pool, fmt.Sprintf("%s, %s", name, podIp), inventoryService, inventoryReservationService)
app := &App{
pool: pool,
server: syncedServer,
}
mux := http.NewServeMux()
debugMux := http.NewServeMux()
grpcSrv, err := actor.NewControlServer[cart.CartGrain](controlPlaneConfig, pool)
if err != nil {
log.Fatalf("Error starting control plane gRPC server: %v\n", err)
}
defer grpcSrv.GracefulStop()
// go diskStorage.SaveLoop(10 * time.Second)
UseDiscovery(pool)
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
defer stop()
otelShutdown, err := setupOTelSDK(ctx)
if err != nil {
log.Fatalf("Unable to start otel %v", err)
}
syncedServer.Serve(mux)
// only for local
mux.HandleFunc("GET /add/remote/{host}", func(w http.ResponseWriter, r *http.Request) {
pool.AddRemote(r.PathValue("host"))
})
debugMux.HandleFunc("/debug/pprof/", pprof.Index)
debugMux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
debugMux.HandleFunc("/debug/pprof/profile", pprof.Profile)
debugMux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
debugMux.HandleFunc("/debug/pprof/trace", pprof.Trace)
debugMux.Handle("/metrics", promhttp.Handler())
mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
// Grain pool health: simple capacity check (mirrors previous GrainHandler.IsHealthy)
grainCount, capacity := app.pool.LocalUsage()
if grainCount >= capacity {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("grain pool at capacity"))
return
}
if !pool.IsHealthy() {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("control plane not healthy"))
return
}
w.WriteHeader(http.StatusOK)
w.Write([]byte("ok"))
})
mux.HandleFunc("/readyz", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("ok"))
})
mux.HandleFunc("/livez", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("ok"))
})
mux.HandleFunc("/version", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("1.0.0"))
})
mux.HandleFunc("/openapi.json", ServeEmbeddedOpenAPI)
srv := &http.Server{
Addr: ":8080",
BaseContext: func(net.Listener) context.Context { return ctx },
ReadTimeout: 10 * time.Second,
WriteTimeout: 20 * time.Second,
Handler: otelhttp.NewHandler(mux, "/"),
}
defer func() {
fmt.Println("Shutting down due to signal")
otelShutdown(context.Background())
diskStorage.Close()
pool.Close()
}()
srvErr := make(chan error, 1)
go func() {
srvErr <- srv.ListenAndServe()
}()
listener := inventory.NewInventoryChangeListener(rdb, context.Background(), func(changes []inventory.InventoryChange) {
for _, change := range changes {
log.Printf("inventory change: %v", change)
inventoryPubSub.Publish(change)
}
})
go func() {
err := listener.Start()
if err != nil {
log.Fatalf("Unable to start inventory listener: %v", err)
}
}()
log.Print("Server started at port 8080")
go http.ListenAndServe(":8081", debugMux)
select {
case err = <-srvErr:
// Error when starting HTTP server.
log.Fatalf("Unable to start server: %v", err)
case <-ctx.Done():
// Wait for first CTRL+C.
// Stop receiving signal notifications as soon as possible.
stop()
}
}

File diff suppressed because it is too large Load Diff

View File

@@ -1,69 +0,0 @@
package main
import (
"bytes"
"crypto/sha256"
_ "embed"
"encoding/hex"
"net/http"
"sync"
)
// openapi_embed.go: Provides embedded OpenAPI spec and helper to mount handler.
//go:embed openapi.json
var openapiJSON []byte
var (
openapiOnce sync.Once
openapiETag string
)
// initOpenAPIMetadata computes immutable metadata for the embedded spec.
func initOpenAPIMetadata() {
sum := sha256.Sum256(openapiJSON)
openapiETag = `W/"` + hex.EncodeToString(sum[:8]) + `"` // weak ETag with first 8 bytes
}
// ServeEmbeddedOpenAPI serves the embedded OpenAPI JSON spec at /openapi.json.
// It supports GET and HEAD and implements basic ETag caching.
func ServeEmbeddedOpenAPI(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodGet && r.Method != http.MethodHead {
w.Header().Set("Allow", "GET, HEAD")
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
return
}
openapiOnce.Do(initOpenAPIMetadata)
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("ETag", openapiETag)
if match := r.Header.Get("If-None-Match"); match != "" {
if bytes.Contains([]byte(match), []byte(openapiETag)) {
w.WriteHeader(http.StatusNotModified)
return
}
}
if r.Method == http.MethodHead {
w.WriteHeader(http.StatusOK)
return
}
w.WriteHeader(http.StatusOK)
_, _ = w.Write(openapiJSON)
}
// Optional: function to access raw spec bytes programmatically.
func OpenAPISpecBytes() []byte {
return openapiJSON
}
// Optional: function to access current ETag.
func OpenAPIETag() string {
openapiOnce.Do(initOpenAPIMetadata)
return openapiETag
}

View File

@@ -1,117 +0,0 @@
package main
import (
"context"
"errors"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/log/global"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/log"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/trace"
)
// setupOTelSDK bootstraps the OpenTelemetry pipeline.
// If it does not return an error, make sure to call shutdown for proper cleanup.
func setupOTelSDK(ctx context.Context) (func(context.Context) error, error) {
var shutdownFuncs []func(context.Context) error
var err error
// shutdown calls cleanup functions registered via shutdownFuncs.
// The errors from the calls are joined.
// Each registered cleanup will be invoked once.
shutdown := func(ctx context.Context) error {
var err error
for _, fn := range shutdownFuncs {
err = errors.Join(err, fn(ctx))
}
shutdownFuncs = nil
return err
}
// handleErr calls shutdown for cleanup and makes sure that all errors are returned.
handleErr := func(inErr error) {
err = errors.Join(inErr, shutdown(ctx))
}
// Set up propagator.
prop := newPropagator()
otel.SetTextMapPropagator(prop)
// Set up trace provider.
tracerProvider, err := newTracerProvider()
if err != nil {
handleErr(err)
return shutdown, err
}
shutdownFuncs = append(shutdownFuncs, tracerProvider.Shutdown)
otel.SetTracerProvider(tracerProvider)
// Set up meter provider.
meterProvider, err := newMeterProvider()
if err != nil {
handleErr(err)
return shutdown, err
}
shutdownFuncs = append(shutdownFuncs, meterProvider.Shutdown)
otel.SetMeterProvider(meterProvider)
// Set up logger provider.
loggerProvider, err := newLoggerProvider()
if err != nil {
handleErr(err)
return shutdown, err
}
shutdownFuncs = append(shutdownFuncs, loggerProvider.Shutdown)
global.SetLoggerProvider(loggerProvider)
return shutdown, err
}
func newPropagator() propagation.TextMapPropagator {
return propagation.NewCompositeTextMapPropagator(
propagation.TraceContext{},
propagation.Baggage{},
)
}
func newTracerProvider() (*trace.TracerProvider, error) {
traceExporter, err := otlptracegrpc.New(context.Background())
if err != nil {
return nil, err
}
tracerProvider := trace.NewTracerProvider(
trace.WithBatcher(traceExporter,
// Default is 5s. Set to 1s for demonstrative purposes.
trace.WithBatchTimeout(time.Second)),
)
return tracerProvider, nil
}
func newMeterProvider() (*metric.MeterProvider, error) {
exporter, err := otlpmetricgrpc.New(context.Background())
if err != nil {
return nil, err
}
provider := metric.NewMeterProvider(metric.WithReader(metric.NewPeriodicReader(exporter)))
return provider, nil
}
func newLoggerProvider() (*log.LoggerProvider, error) {
logExporter, err := otlploggrpc.New(context.Background())
if err != nil {
return nil, err
}
loggerProvider := log.NewLoggerProvider(
log.WithProcessor(log.NewBatchProcessor(logExporter)),
)
return loggerProvider, nil
}

View File

@@ -1,530 +0,0 @@
package main
import (
"context"
"encoding/json"
"io"
"log"
"net/http"
"strconv"
"sync"
"time"
"git.k6n.net/go-cart-actor/pkg/actor"
"git.k6n.net/go-cart-actor/pkg/cart"
messages "git.k6n.net/go-cart-actor/proto/cart"
"git.k6n.net/go-cart-actor/pkg/voucher"
"github.com/matst80/go-redis-inventory/pkg/inventory"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"go.opentelemetry.io/contrib/bridges/otelslog"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/trace"
)
var (
grainMutations = promauto.NewCounter(prometheus.CounterOpts{
Name: "cart_grain_mutations_total",
Help: "The total number of mutations",
})
grainLookups = promauto.NewCounter(prometheus.CounterOpts{
Name: "cart_grain_lookups_total",
Help: "The total number of lookups",
})
)
type PoolServer struct {
actor.GrainPool[cart.CartGrain]
pod_name string
inventoryService inventory.InventoryService
reservationService inventory.CartReservationService
}
func NewPoolServer(pool actor.GrainPool[cart.CartGrain], pod_name string, inventoryService inventory.InventoryService, inventoryReservationService inventory.CartReservationService) *PoolServer {
srv := &PoolServer{
GrainPool: pool,
pod_name: pod_name,
inventoryService: inventoryService,
reservationService: inventoryReservationService,
}
return srv
}
func (s *PoolServer) ApplyLocal(ctx context.Context, id cart.CartId, mutation ...proto.Message) (*actor.MutationResult[cart.CartGrain], error) {
return s.Apply(ctx, uint64(id), mutation...)
}
func (s *PoolServer) GetCartHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
grain, err := s.Get(r.Context(), uint64(id))
if err != nil {
return err
}
return s.WriteResult(w, grain)
}
func (s *PoolServer) AddSkuToCartHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
sku := r.PathValue("sku")
msg, err := GetItemAddMessage(r.Context(), sku, 1, getCountryFromHost(r.Host), nil)
if err != nil {
return err
}
data, err := s.ApplyLocal(r.Context(), id, msg)
if err != nil {
return err
}
grainMutations.Add(float64(len(data.Mutations)))
return s.WriteResult(w, data)
}
func (s *PoolServer) WriteResult(w http.ResponseWriter, result any) error {
w.Header().Set("Content-Type", "application/json")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("X-Pod-Name", s.pod_name)
if result == nil {
w.WriteHeader(http.StatusInternalServerError)
return nil
}
w.WriteHeader(http.StatusOK)
enc := json.NewEncoder(w)
err := enc.Encode(result)
return err
}
func (s *PoolServer) DeleteItemHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
itemIdString := r.PathValue("itemId")
itemId, err := strconv.ParseInt(itemIdString, 10, 64)
if err != nil {
return err
}
data, err := s.ApplyLocal(r.Context(), id, &messages.RemoveItem{Id: uint32(itemId)})
if err != nil {
return err
}
return s.WriteResult(w, data)
}
func (s *PoolServer) QuantityChangeHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
changeQuantity := messages.ChangeQuantity{}
err := json.NewDecoder(r.Body).Decode(&changeQuantity)
if err != nil {
return err
}
reply, err := s.ApplyLocal(r.Context(), id, &changeQuantity)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
type Item struct {
Sku string `json:"sku"`
Quantity int `json:"quantity"`
StoreId *string `json:"storeId,omitempty"`
}
type SetCartItems struct {
Country string `json:"country"`
Items []Item `json:"items"`
}
func getMultipleAddMessages(ctx context.Context, items []Item, country string) []proto.Message {
wg := sync.WaitGroup{}
mu := sync.Mutex{}
msgs := make([]proto.Message, 0, len(items))
for _, itm := range items {
wg.Go(
func() {
msg, err := GetItemAddMessage(ctx, itm.Sku, itm.Quantity, country, itm.StoreId)
if err != nil {
log.Printf("error adding item %s: %v", itm.Sku, err)
return
}
mu.Lock()
msgs = append(msgs, msg)
mu.Unlock()
})
}
wg.Wait()
return msgs
}
func (s *PoolServer) SetCartItemsHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
setCartItems := SetCartItems{}
err := json.NewDecoder(r.Body).Decode(&setCartItems)
if err != nil {
return err
}
msgs := make([]proto.Message, 0, len(setCartItems.Items)+1)
msgs = append(msgs, &messages.ClearCartRequest{})
msgs = append(msgs, getMultipleAddMessages(r.Context(), setCartItems.Items, setCartItems.Country)...)
reply, err := s.ApplyLocal(r.Context(), id, msgs...)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
func (s *PoolServer) AddMultipleItemHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
setCartItems := SetCartItems{}
err := json.NewDecoder(r.Body).Decode(&setCartItems)
if err != nil {
return err
}
msgs := getMultipleAddMessages(r.Context(), setCartItems.Items, setCartItems.Country)
reply, err := s.ApplyLocal(r.Context(), id, msgs...)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
type AddRequest struct {
Sku string `json:"sku"`
Quantity int32 `json:"quantity"`
Country string `json:"country"`
StoreId *string `json:"storeId"`
}
func (s *PoolServer) AddSkuRequestHandler(w http.ResponseWriter, r *http.Request, id cart.CartId) error {
addRequest := AddRequest{Quantity: 1}
err := json.NewDecoder(r.Body).Decode(&addRequest)
if err != nil {
return err
}
msg, err := GetItemAddMessage(r.Context(), addRequest.Sku, int(addRequest.Quantity), addRequest.Country, addRequest.StoreId)
if err != nil {
return err
}
reply, err := s.ApplyLocal(r.Context(), id, msg)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
// func (s *PoolServer) HandleConfirmation(w http.ResponseWriter, r *http.Request, id CartId) error {
// orderId := r.PathValue("orderId")
// if orderId == "" {
// return fmt.Errorf("orderId is empty")
// }
// order, err := KlarnaInstance.GetOrder(orderId)
// if err != nil {
// return err
// }
// w.Header().Set("Content-Type", "application/json")
// w.Header().Set("X-Pod-Name", s.pod_name)
// w.Header().Set("Cache-Control", "no-cache")
// w.Header().Set("Access-Control-Allow-Origin", "*")
// w.WriteHeader(http.StatusOK)
// return json.NewEncoder(w).Encode(order)
// }
// func (s *PoolServer) HandleCheckout(w http.ResponseWriter, r *http.Request, id CartId) error {
// klarnaOrder, err := s.CreateOrUpdateCheckout(r.Host, id)
// if err != nil {
// return err
// }
// s.ApplyCheckoutStarted(klarnaOrder, id)
// w.Header().Set("Content-Type", "application/json")
// return json.NewEncoder(w).Encode(klarnaOrder)
// }
//
// Removed leftover legacy block after CookieCartIdHandler (obsolete code referencing cid/legacy)
func (s *PoolServer) RemoveCartCookie(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
// Clear cart cookie (breaking change: do not issue a new legacy id here)
http.SetCookie(w, &http.Cookie{
Name: "cartid",
Value: "",
Path: "/",
Secure: r.TLS != nil,
HttpOnly: true,
Expires: time.Unix(0, 0),
SameSite: http.SameSiteLaxMode,
})
w.WriteHeader(http.StatusOK)
return nil
}
func (s *PoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error) func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error {
return func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error {
if ownerHost, ok := s.OwnerHost(uint64(cartId)); ok {
ctx, span := tracer.Start(r.Context(), "proxy")
defer span.End()
span.SetAttributes(attribute.String("cartid", cartId.String()))
hostAttr := attribute.String("other host", ownerHost.Name())
span.SetAttributes(hostAttr)
logger.InfoContext(ctx, "cart proxyed", "result", ownerHost.Name())
proxyCalls.Add(ctx, 1, metric.WithAttributes(hostAttr))
handled, err := ownerHost.Proxy(uint64(cartId), w, r, nil)
grainLookups.Inc()
if err == nil && handled {
return nil
}
}
_, span := tracer.Start(r.Context(), "own")
span.SetAttributes(attribute.String("cartid", cartId.String()))
defer span.End()
return fn(w, r, cartId)
}
}
var (
tracer = otel.Tracer(name)
meter = otel.Meter(name)
logger = otelslog.NewLogger(name)
proxyCalls metric.Int64Counter
)
func init() {
var err error
proxyCalls, err = meter.Int64Counter("proxy.calls",
metric.WithDescription("Number of proxy calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
}
type AddVoucherRequest struct {
VoucherCode string `json:"code"`
}
func (s *PoolServer) AddVoucherHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
data := &AddVoucherRequest{}
json.NewDecoder(r.Body).Decode(data)
v := voucher.Service{}
msg, err := v.GetVoucher(data.VoucherCode)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return err
}
reply, err := s.ApplyLocal(r.Context(), cartId, msg)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return err
}
s.WriteResult(w, reply)
return nil
}
type SubscriptionDetailsRequest struct {
Id *string `json:"id,omitempty"`
OfferingCode string `json:"offeringCode,omitempty"`
SigningType string `json:"signingType,omitempty"`
Data json.RawMessage `json:"data,omitempty"`
}
func (sd *SubscriptionDetailsRequest) ToMessage() *messages.UpsertSubscriptionDetails {
return &messages.UpsertSubscriptionDetails{
Id: sd.Id,
OfferingCode: sd.OfferingCode,
SigningType: sd.SigningType,
Data: &anypb.Any{Value: sd.Data},
}
}
func (s *PoolServer) SubscriptionDetailsHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
data := &SubscriptionDetailsRequest{}
err := json.NewDecoder(r.Body).Decode(data)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return err
}
reply, err := s.ApplyLocal(r.Context(), cartId, data.ToMessage())
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return err
}
s.WriteResult(w, reply)
return nil
}
func (s *PoolServer) RemoveVoucherHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
idStr := r.PathValue("voucherId")
id, err := strconv.ParseInt(idStr, 10, 64)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return err
}
reply, err := s.ApplyLocal(r.Context(), cartId, &messages.RemoveVoucher{Id: uint32(id)})
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return err
}
s.WriteResult(w, reply)
return nil
}
func (s *PoolServer) SetUserIdHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
setUserId := messages.SetUserId{}
err := json.NewDecoder(r.Body).Decode(&setUserId)
if err != nil {
return err
}
reply, err := s.ApplyLocal(r.Context(), cartId, &setUserId)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
func (s *PoolServer) LineItemMarkingHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
itemIdStr := r.PathValue("itemId")
itemId, err := strconv.ParseInt(itemIdStr, 10, 64)
if err != nil {
return err
}
lineItemMarking := messages.LineItemMarking{Id: uint32(itemId)}
err = json.NewDecoder(r.Body).Decode(&lineItemMarking)
if err != nil {
return err
}
reply, err := s.ApplyLocal(r.Context(), cartId, &lineItemMarking)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
func (s *PoolServer) RemoveLineItemMarkingHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
itemIdStr := r.PathValue("itemId")
itemId, err := strconv.ParseInt(itemIdStr, 10, 64)
if err != nil {
return err
}
removeLineItemMarking := messages.RemoveLineItemMarking{Id: uint32(itemId)}
reply, err := s.ApplyLocal(r.Context(), cartId, &removeLineItemMarking)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
func (s *PoolServer) InternalApplyMutationHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
if r.Method != http.MethodPost {
w.WriteHeader(http.StatusMethodNotAllowed)
return nil
}
data, err := io.ReadAll(r.Body)
if err != nil {
return err
}
mutation := &messages.Mutation{}
err = proto.Unmarshal(data, mutation)
if err != nil {
return err
}
reply, err := s.ApplyLocal(r.Context(), cartId, mutation)
if err != nil {
return err
}
return s.WriteResult(w, reply)
}
func (s *PoolServer) GetAnywhere(ctx context.Context, cartId cart.CartId) (*cart.CartGrain, error) {
id := uint64(cartId)
if host, isOnOtherHost := s.OwnerHost(id); isOnOtherHost {
return host.Get(ctx, id)
}
return s.Get(ctx, id)
}
func (s *PoolServer) ApplyAnywhere(ctx context.Context, cartId cart.CartId, msgs ...proto.Message) error {
id := uint64(cartId)
if host, isOnOtherHost := s.OwnerHost(id); isOnOtherHost {
_, err := host.Apply(ctx, id, msgs...)
return err
}
_, err := s.Apply(ctx, id, msgs...)
return err
}
func (s *PoolServer) Serve(mux *http.ServeMux) {
// mux.HandleFunc("OPTIONS /cart", func(w http.ResponseWriter, r *http.Request) {
// w.Header().Set("Access-Control-Allow-Origin", "*")
// w.Header().Set("Access-Control-Allow-Methods", "GET, PUT, POST, DELETE")
// w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
// w.WriteHeader(http.StatusOK)
// })
handleFunc := func(pattern string, handlerFunc func(http.ResponseWriter, *http.Request)) {
attr := attribute.String("http.route", pattern)
mux.HandleFunc(pattern, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
span := trace.SpanFromContext(r.Context())
span.SetName(pattern)
span.SetAttributes(attr)
labeler, _ := otelhttp.LabelerFromContext(r.Context())
labeler.Add(attr)
handlerFunc(w, r)
}))
}
handleFunc("GET /cart", CookieCartIdHandler(s.ProxyHandler(s.GetCartHandler)))
handleFunc("GET /cart/add/{sku}", CookieCartIdHandler(s.ProxyHandler(s.AddSkuToCartHandler)))
handleFunc("POST /cart/add", CookieCartIdHandler(s.ProxyHandler(s.AddMultipleItemHandler)))
handleFunc("POST /cart", CookieCartIdHandler(s.ProxyHandler(s.AddSkuRequestHandler)))
handleFunc("POST /cart/set", CookieCartIdHandler(s.ProxyHandler(s.SetCartItemsHandler)))
handleFunc("DELETE /cart/{itemId}", CookieCartIdHandler(s.ProxyHandler(s.DeleteItemHandler)))
handleFunc("PUT /cart", CookieCartIdHandler(s.ProxyHandler(s.QuantityChangeHandler)))
handleFunc("DELETE /cart", CookieCartIdHandler(s.ProxyHandler(s.RemoveCartCookie)))
handleFunc("PUT /cart/voucher", CookieCartIdHandler(s.ProxyHandler(s.AddVoucherHandler)))
handleFunc("PUT /cart/subscription-details", CookieCartIdHandler(s.ProxyHandler(s.SubscriptionDetailsHandler)))
handleFunc("DELETE /cart/voucher/{voucherId}", CookieCartIdHandler(s.ProxyHandler(s.RemoveVoucherHandler)))
handleFunc("PUT /cart/user", CookieCartIdHandler(s.ProxyHandler(s.SetUserIdHandler)))
handleFunc("PUT /cart/item/{itemId}/marking", CookieCartIdHandler(s.ProxyHandler(s.LineItemMarkingHandler)))
handleFunc("DELETE /cart/item/{itemId}/marking", CookieCartIdHandler(s.ProxyHandler(s.RemoveLineItemMarkingHandler)))
//mux.HandleFunc("GET /cart/checkout", CookieCartIdHandler(s.ProxyHandler(s.HandleCheckout)))
//mux.HandleFunc("GET /cart/confirmation/{orderId}", CookieCartIdHandler(s.ProxyHandler(s.HandleConfirmation)))
handleFunc("GET /cart/byid/{id}", CartIdHandler(s.ProxyHandler(s.GetCartHandler)))
handleFunc("POST /cart/byid/{id}", CartIdHandler(s.ProxyHandler(s.AddSkuRequestHandler)))
handleFunc("DELETE /cart/byid/{id}/{itemId}", CartIdHandler(s.ProxyHandler(s.DeleteItemHandler)))
handleFunc("PUT /cart/byid/{id}", CartIdHandler(s.ProxyHandler(s.QuantityChangeHandler)))
handleFunc("PUT /cart/byid/{id}/voucher", CookieCartIdHandler(s.ProxyHandler(s.AddVoucherHandler)))
handleFunc("DELETE /cart/byid/{id}/voucher/{voucherId}", CookieCartIdHandler(s.ProxyHandler(s.RemoveVoucherHandler)))
handleFunc("PUT /cart/byid/{id}/user", CartIdHandler(s.ProxyHandler(s.SetUserIdHandler)))
handleFunc("PUT /cart/byid/{id}/item/{itemId}/marking", CartIdHandler(s.ProxyHandler(s.LineItemMarkingHandler)))
handleFunc("DELETE /cart/byid/{id}/item/{itemId}/marking", CartIdHandler(s.ProxyHandler(s.RemoveLineItemMarkingHandler)))
}

View File

@@ -1,150 +0,0 @@
package main
import (
"context"
"encoding/json"
"fmt"
"net/http"
"git.k6n.net/go-cart-actor/pkg/cart"
messages "git.k6n.net/go-cart-actor/proto/cart"
"github.com/matst80/slask-finder/pkg/index"
)
// TODO make this configurable
func getBaseUrl(country string) string {
// if country == "se" {
// return "http://s10n-se:8080"
// }
if country == "no" {
return "http://s10n-no.s10n:8080"
}
if country == "se" {
return "http://s10n-se.s10n:8080"
}
return "http://localhost:8082"
}
func FetchItem(ctx context.Context, sku string, country string) (*index.DataItem, error) {
baseUrl := getBaseUrl(country)
req, err := http.NewRequest("GET", fmt.Sprintf("%s/api/by-sku/%s", baseUrl, sku), nil)
innerCtx, span := tracer.Start(ctx, fmt.Sprintf("fetching data for %s", sku))
defer span.End()
req = req.WithContext(innerCtx)
if err != nil {
return nil, err
}
res, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
var item index.DataItem
err = json.NewDecoder(res.Body).Decode(&item)
return &item, err
}
func GetItemAddMessage(ctx context.Context, sku string, qty int, country string, storeId *string) (*messages.AddItem, error) {
item, err := FetchItem(ctx, sku, country)
if err != nil {
return nil, err
}
return ToItemAddMessage(item, storeId, qty, country)
}
func ToItemAddMessage(item *index.DataItem, storeId *string, qty int, country string) (*messages.AddItem, error) {
orgPrice, _ := getInt(item.GetNumberFieldValue(5)) // getInt(item.Fields[5])
price, err := getInt(item.GetNumberFieldValue(4)) //Fields[4]
if err != nil {
return nil, err
}
stk := item.GetStock()
stock := cart.StockStatus(0)
if storeId == nil {
centralStock, ok := stk[country]
if ok {
if !item.Buyable {
return nil, fmt.Errorf("item not available")
}
if centralStock == 0 && item.SaleStatus == "TBD" {
return nil, fmt.Errorf("no items available")
}
stock = cart.StockStatus(centralStock)
}
} else {
if !item.BuyableInStore {
return nil, fmt.Errorf("item not available in store")
}
storeStock, ok := stk[*storeId]
if ok {
stock = cart.StockStatus(storeStock)
}
}
articleType, _ := item.GetStringFieldValue(1) //.Fields[1].(string)
outletGrade, ok := item.GetStringFieldValue(20) //.Fields[20].(string)
var outlet *string
if ok {
outlet = &outletGrade
}
sellerId, _ := item.GetStringFieldValue(24) // .Fields[24].(string)
sellerName, _ := item.GetStringFieldValue(9) // .Fields[9].(string)
brand, _ := item.GetStringFieldValue(2) //.Fields[2].(string)
category, _ := item.GetStringFieldValue(10) //.Fields[10].(string)
category2, _ := item.GetStringFieldValue(11) //.Fields[11].(string)
category3, _ := item.GetStringFieldValue(12) //.Fields[12].(string)
category4, _ := item.GetStringFieldValue(13) //Fields[13].(string)
category5, _ := item.GetStringFieldValue(14) //.Fields[14].(string)
cgm, _ := item.GetStringFieldValue(35) // Customer Group Membership
return &messages.AddItem{
ItemId: uint32(item.Id),
Quantity: int32(qty),
Price: int64(price),
OrgPrice: int64(orgPrice),
Sku: item.GetSku(),
Name: item.Title,
Image: item.Img,
Stock: int32(stock),
Brand: brand,
Category: category,
Category2: category2,
Category3: category3,
Category4: category4,
Category5: category5,
Tax: getTax(articleType),
SellerId: sellerId,
SellerName: sellerName,
ArticleType: articleType,
Disclaimer: item.Disclaimer,
Country: country,
Outlet: outlet,
StoreId: storeId,
SaleStatus: item.SaleStatus,
Cgm: cgm,
}, nil
}
func getTax(articleType string) int32 {
switch articleType {
case "ZDIE":
return 600
default:
return 2500
}
}
func getInt(data float64, ok bool) (int, error) {
if !ok {
return 0, fmt.Errorf("invalid type")
}
return int(data), nil
}

View File

@@ -1,138 +0,0 @@
package main
import (
"log"
"net/http"
"time"
"git.k6n.net/go-cart-actor/pkg/cart"
"github.com/matst80/go-redis-inventory/pkg/inventory"
)
func getCurrency(country string) string {
if country == "no" {
return "NOK"
}
return "SEK"
}
func getLocale(country string) string {
if country == "no" {
return "nb-no"
}
return "sv-se"
}
func getLocationId(item *cart.CartItem) inventory.LocationID {
if item.StoreId == nil || *item.StoreId == "" {
return "se"
}
return inventory.LocationID(*item.StoreId)
}
func getInventoryRequests(items []*cart.CartItem) []inventory.ReserveRequest {
var requests []inventory.ReserveRequest
for _, item := range items {
if item == nil {
continue
}
requests = append(requests, inventory.ReserveRequest{
InventoryReference: &inventory.InventoryReference{
SKU: inventory.SKU(item.Sku),
LocationID: getLocationId(item),
},
Quantity: uint32(item.Quantity),
})
}
return requests
}
func getOriginalHost(r *http.Request) string {
proxyHost := r.Header.Get("X-Forwarded-Host")
if proxyHost != "" {
return proxyHost
}
return r.Host
}
func getClientIp(r *http.Request) string {
ip := r.Header.Get("X-Forwarded-For")
if ip == "" {
ip = r.RemoteAddr
}
return ip
}
func CookieCartIdHandler(fn func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
var id cart.CartId
cookie, err := r.Cookie("cartid")
if err != nil || cookie.Value == "" {
id = cart.MustNewCartId()
http.SetCookie(w, &http.Cookie{
Name: "cartid",
Value: id.String(),
Secure: r.TLS != nil,
HttpOnly: true,
Path: "/",
Expires: time.Now().AddDate(0, 0, 14),
SameSite: http.SameSiteLaxMode,
})
w.Header().Set("Set-Cart-Id", id.String())
} else {
parsed, ok := cart.ParseCartId(cookie.Value)
if !ok {
id = cart.MustNewCartId()
http.SetCookie(w, &http.Cookie{
Name: "cartid",
Value: id.String(),
Secure: r.TLS != nil,
HttpOnly: true,
Path: "/",
Expires: time.Now().AddDate(0, 0, 14),
SameSite: http.SameSiteLaxMode,
})
w.Header().Set("Set-Cart-Id", id.String())
} else {
id = parsed
}
}
err = fn(id, w, r)
if err != nil {
log.Printf("Server error, not remote error: %v\n", err)
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
}
}
}
func CartIdHandler(fn func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
var id cart.CartId
raw := r.PathValue("id")
// If no id supplied, generate a new one
if raw == "" {
id := cart.MustNewCartId()
w.Header().Set("Set-Cart-Id", id.String())
} else {
// Parse base62 cart id
if parsedId, ok := cart.ParseCartId(raw); !ok {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("cart id is invalid"))
return
} else {
id = parsedId
}
}
err := fn(id, w, r)
if err != nil {
log.Printf("Server error, not remote error: %v\n", err)
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
}
}
}

View File

@@ -1,264 +0,0 @@
package main
import (
"encoding/json"
"errors"
"fmt"
"log"
"net/http"
"net/url"
"time"
"git.k6n.net/go-cart-actor/pkg/cart"
messages "git.k6n.net/go-cart-actor/proto/checkout"
adyenCheckout "github.com/adyen/adyen-go-api-library/v21/src/checkout"
"github.com/adyen/adyen-go-api-library/v21/src/common"
"github.com/adyen/adyen-go-api-library/v21/src/hmacvalidator"
"github.com/adyen/adyen-go-api-library/v21/src/webhook"
"github.com/google/uuid"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"google.golang.org/protobuf/types/known/timestamppb"
)
type SessionRequest struct {
SessionId *string `json:"sessionId,omitempty"`
SessionResult string `json:"sessionResult"`
SessionData *string `json:"sessionData,omitempty"`
}
// func (s *CheckoutPoolServer) AdyenSessionHandler(w http.ResponseWriter, r *http.Request, cartId cart.CartId) error {
// grain, err := s.Get(r.Context(), uint64(cartId))
// if err != nil {
// return err
// }
// if r.Method == http.MethodGet {
// service := s.adyenClient.Checkout()
// req := service.PaymentsApi.GetResultOfPaymentSessionInput(pa).SessionResult(payload.SessionResult)
// res, _, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
// if err != nil {
// return err
// }
// return s.WriteResult(w, res)
// } else {
// payload := &SessionRequest{}
// if err := json.NewDecoder(r.Body).Decode(payload); err != nil {
// return err
// }
// service := s.adyenClient.Checkout()
// req := service.PaymentsApi.GetResultOfPaymentSessionInput(payload.SessionId).SessionResult(payload.SessionResult)
// res, _, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
// if err != nil {
// return err
// }
// return s.WriteResult(w, res)
// }
// }
func getCheckoutIdFromNotificationItem(item webhook.NotificationRequestItem) (*cart.CartId, error) {
cartId, ok := cart.ParseCartId(item.MerchantReference)
if !ok {
log.Printf("The notification does not have a valid cartId: %s", item.MerchantReference)
return nil, errors.New("invalid cart id")
}
return &cartId, nil
}
func (s *CheckoutPoolServer) AdyenHookHandler(w http.ResponseWriter, r *http.Request) {
var notificationRequest webhook.Webhook
service := s.adyenClient.Checkout()
if err := json.NewDecoder(r.Body).Decode(&notificationRequest); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
for _, notificationItem := range *notificationRequest.NotificationItems {
item := notificationItem.NotificationRequestItem
log.Printf("Recieved notification event code: %s, %+v", item.EventCode, item)
isValid := hmacvalidator.ValidateHmac(item, hmacKey)
if !isValid {
log.Printf("notification hmac not valid %s, %v", item.EventCode, item)
http.Error(w, "Invalid HMAC", http.StatusUnauthorized)
return
} else {
// Marshal item data for PaymentEvent
dataBytes, err := json.Marshal(item)
if err != nil {
log.Printf("error marshaling item: %v", err)
http.Error(w, "Error marshaling item", http.StatusInternalServerError)
return
}
switch item.EventCode {
case "CAPTURE":
checkoutId, err := getCheckoutIdFromNotificationItem(item)
if err != nil {
log.Printf("Could not get checkout id: %v", err)
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
log.Printf("Capture status: %v", item.Success)
isSuccess := item.Success == "true"
// If successful, apply payment completed
//if isSuccess {
if err := s.ApplyAnywhere(r.Context(), *checkoutId,
&messages.PaymentEvent{
PaymentId: item.PspReference,
Success: isSuccess,
Name: item.EventCode,
Data: &anypb.Any{Value: dataBytes},
}, &messages.PaymentCompleted{
PaymentId: item.PspReference,
Status: item.Success,
Amount: item.Amount.Value,
Currency: item.Amount.Currency,
ProcessorReference: &item.PspReference,
CompletedAt: timestamppb.New(time.Now()),
}); err != nil {
http.Error(w, "Message not parsed", http.StatusInternalServerError)
return
}
//}
case "AUTHORISATION":
isSuccess := item.Success == "true"
log.Printf("Handling auth: %+v", item)
checkoutId, err := getCheckoutIdFromNotificationItem(item)
if err != nil {
log.Printf("Could not get checkout id: %v", err)
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
msgs := []proto.Message{
&messages.PaymentEvent{
PaymentId: item.PspReference,
Success: isSuccess,
Name: item.EventCode,
Data: &anypb.Any{Value: dataBytes},
},
}
if isSuccess {
msgs = append(msgs, &messages.PaymentCompleted{
PaymentId: item.PspReference,
Status: item.Success,
Amount: item.Amount.Value,
CompletedAt: timestamppb.Now(),
})
} else {
msgs = append(msgs, &messages.PaymentDeclined{
PaymentId: item.PspReference,
Message: item.Reason,
})
}
if err := s.ApplyAnywhere(r.Context(), *checkoutId, msgs...); err != nil {
log.Printf("error applying authorization event: %v", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// If successful authorization, trigger capture
if isSuccess {
pspReference := item.PspReference
uid := uuid.New().String()
ref := checkoutId.String()
req := service.ModificationsApi.CaptureAuthorisedPaymentInput(pspReference).IdempotencyKey(uid).PaymentCaptureRequest(adyenCheckout.PaymentCaptureRequest{
Amount: adyenCheckout.Amount(item.Amount),
MerchantAccount: "ElgigantenECOM",
Reference: &ref,
})
res, _, err := service.ModificationsApi.CaptureAuthorisedPayment(r.Context(), req)
if err != nil {
log.Printf("Error capturing payment: %v", err)
} else {
log.Printf("Payment captured successfully: %+v", res)
s.ApplyAnywhere(r.Context(), *checkoutId, &messages.OrderCreated{
OrderId: res.PaymentPspReference,
Status: item.EventCode,
})
}
}
default:
log.Printf("Unknown event code: %s", item.EventCode)
log.Printf("Item data: %+v", item)
isSuccess := item.Success == "true"
checkoutId, err := getCheckoutIdFromNotificationItem(item)
if err != nil {
log.Printf("Could not get checkout id: %v", err)
} else {
if err := s.ApplyAnywhere(r.Context(), *checkoutId, &messages.PaymentEvent{
PaymentId: item.PspReference,
Success: isSuccess,
Name: item.EventCode,
Data: &anypb.Any{Value: dataBytes},
}); err != nil {
log.Printf("error applying payment event: %v", err)
}
}
}
}
}
w.WriteHeader(http.StatusAccepted)
}
func (s *CheckoutPoolServer) AdyenReturnHandler(w http.ResponseWriter, r *http.Request) {
log.Println("Redirect received")
service := s.adyenClient.Checkout()
req := service.PaymentsApi.GetResultOfPaymentSessionInput(r.URL.Query().Get("sessionId"))
res, httpRes, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
log.Printf("got payment session %+v", res)
dreq := service.PaymentsApi.PaymentsDetailsInput()
dreq = dreq.PaymentDetailsRequest(adyenCheckout.PaymentDetailsRequest{
Details: adyenCheckout.PaymentCompletionDetails{
RedirectResult: common.PtrString(r.URL.Query().Get("redirectResult")),
Payload: common.PtrString(r.URL.Query().Get("payload")),
},
})
dres, httpRes, err := service.PaymentsApi.PaymentsDetails(r.Context(), dreq)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
log.Printf("Payment details response: %+v", dres)
if !common.IsNil(dres.PspReference) && *dres.PspReference != "" {
var redirectURL string
// Conditionally handle different result codes for the shopper
switch *dres.ResultCode {
case "Authorised":
redirectURL = "/result/success"
case "Pending", "Received":
redirectURL = "/result/pending"
case "Refused":
redirectURL = "/result/failed"
default:
reason := ""
if dres.RefusalReason != nil {
reason = *dres.RefusalReason
} else {
reason = *dres.ResultCode
}
log.Printf("Payment failed: %s", reason)
redirectURL = fmt.Sprintf("/result/error?reason=%s", url.QueryEscape(reason))
}
http.Redirect(w, r, redirectURL, http.StatusFound)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(httpRes.StatusCode)
json.NewEncoder(w).Encode(httpRes.Status)
}

View File

@@ -1,64 +0,0 @@
package main
import (
"context"
"fmt"
"time"
amqp "github.com/rabbitmq/amqp091-go"
)
type AmqpOrderHandler struct {
conn *amqp.Connection
queue *amqp.Queue
}
func NewAmqpOrderHandler(conn *amqp.Connection) *AmqpOrderHandler {
return &AmqpOrderHandler{
conn: conn,
}
}
func (h *AmqpOrderHandler) DefineQueue() error {
ch, err := h.conn.Channel()
if err != nil {
return fmt.Errorf("failed to open a channel: %w", err)
}
defer ch.Close()
queue, err := ch.QueueDeclare(
"order-queue", // name
false,
false,
false,
false,
nil,
)
if err != nil {
return fmt.Errorf("failed to declare an exchange: %w", err)
}
h.queue = &queue
return nil
}
func (h *AmqpOrderHandler) OrderCompleted(body []byte) error {
ch, err := h.conn.Channel()
if err != nil {
return fmt.Errorf("failed to open a channel: %w", err)
}
defer ch.Close()
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
return ch.PublishWithContext(ctx,
"", // exchange
h.queue.Name, // routing key
false, // mandatory
false, // immediate
amqp.Publishing{
//DeliveryMode: amqp.,
ContentType: "application/json",
Body: body,
})
}

View File

@@ -1,67 +0,0 @@
package main
import (
"context"
"encoding/json"
"fmt"
"log"
"net/http"
"time"
"git.k6n.net/go-cart-actor/pkg/cart"
)
type CartClient struct {
httpClient *http.Client
baseUrl string
}
func NewCartClient(baseUrl string) *CartClient {
return &CartClient{
httpClient: &http.Client{Timeout: 10 * time.Second},
baseUrl: baseUrl,
}
}
// func (c *CartClient) ApplyMutation(cartId cart.CartId, mutation proto.Message) error {
// url := fmt.Sprintf("%s/internal/cart/%s/mutation", c.baseUrl, cartId.String())
// data, err := proto.Marshal(mutation)
// if err != nil {
// return err
// }
// req, err := http.NewRequest("POST", url, bytes.NewReader(data))
// if err != nil {
// return err
// }
// req.Header.Set("Content-Type", "application/protobuf")
// resp, err := c.httpClient.Do(req)
// if err != nil {
// return err
// }
// defer resp.Body.Close()
// if resp.StatusCode != http.StatusOK {
// return fmt.Errorf("cart mutation failed: %s", resp.Status)
// }
// return nil
// }
func (s *CartClient) getCartGrain(ctx context.Context, cartId cart.CartId) (*cart.CartGrain, error) {
// Call cart service to get grain
url := fmt.Sprintf("%s/cart/byid/%s", s.baseUrl, cartId.String())
req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
return nil, err
}
resp, err := s.httpClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
log.Printf("request to %s failed with status %s", url, resp.Status)
return nil, fmt.Errorf("failed to get cart: %s", resp.Status)
}
var grain cart.CartGrain
err = json.NewDecoder(resp.Body).Decode(&grain)
return &grain, err
}

View File

@@ -1,31 +0,0 @@
package main
import (
"context"
"testing"
"git.k6n.net/go-cart-actor/pkg/cart"
)
// TestGetCartGrain_RealService tests against the actual service at https://cart.k6n.net/
// This test is skipped by default and can be run with: go test -run TestGetCartGrain_RealService
func TestGetCartGrain_RealService(t *testing.T) {
t.Skip("Skipping integration test against real service")
client := NewCartClient("https://cart.k6n.net")
// You would need a real cart ID that exists in the system
// For example: cartId := cart.NewCartId(123, 456)
cartId := cart.MustParseCartId("JkfG6bRNLMy")
grain, err := client.getCartGrain(context.Background(), cartId)
if err != nil {
t.Fatalf("Failed to get cart grain: %v", err)
}
if grain == nil {
t.Fatal("Expected grain to be non-nil")
}
t.Logf("Successfully retrieved cart grain: %+v", grain)
}

View File

@@ -1,208 +0,0 @@
package main
import (
"encoding/json"
"fmt"
"net/http"
"git.k6n.net/go-cart-actor/pkg/cart"
"git.k6n.net/go-cart-actor/pkg/checkout"
adyenCheckout "github.com/adyen/adyen-go-api-library/v21/src/checkout"
"github.com/adyen/adyen-go-api-library/v21/src/common"
)
// CheckoutMeta carries the external / URL metadata required to build a
// Klarna CheckoutOrder from a CartGrain snapshot. It deliberately excludes
// any Klarna-specific response fields (HTML snippet, client token, etc.).
type CheckoutMeta struct {
SiteUrl string
// Terms string
// Checkout string
// Confirmation string
ClientIp string
Country string
Currency string // optional override (defaults to "SEK" if empty)
Locale string // optional override (defaults to "sv-se" if empty)
}
// BuildCheckoutOrderPayload converts the current cart grain + meta information
// into a CheckoutOrder domain struct and returns its JSON-serialized payload
// (to send to Klarna) alongside the structured CheckoutOrder object.
//
// This function is PURE: it does not perform any network I/O or mutate the
// grain. The caller is responsible for:
//
// 1. Choosing whether to create or update the Klarna order.
// 2. Invoking KlarnaClient.CreateOrder / UpdateOrder with the returned payload.
// 3. Applying an InitializeCheckout mutation (or equivalent) with the
// resulting Klarna order id + status.
//
// If you later need to support different tax rates per line, you can extend
// CartItem / Delivery to expose that data and propagate it here.
func BuildCheckoutOrderPayload(grain *checkout.CheckoutGrain, meta *CheckoutMeta) ([]byte, *CheckoutOrder, error) {
if grain == nil {
return nil, nil, fmt.Errorf("nil grain")
}
if meta == nil {
return nil, nil, fmt.Errorf("nil checkout meta")
}
currency := meta.Currency
if currency == "" {
currency = "SEK"
}
locale := meta.Locale
if locale == "" {
locale = "sv-se"
}
country := meta.Country
if country == "" {
country = "SE" // sensible default; adjust if multi-country support changes
}
lines := make([]*Line, 0, len(grain.CartState.Items)+len(grain.Deliveries))
// Item lines
for _, it := range grain.CartState.Items {
if it == nil {
continue
}
lines = append(lines, &Line{
Type: "physical",
Reference: it.Sku,
Name: it.Meta.Name,
Quantity: int(it.Quantity),
UnitPrice: int(it.Price.IncVat),
TaxRate: it.Tax, // TODO: derive if variable tax rates are introduced
QuantityUnit: "st",
TotalAmount: int(it.TotalPrice.IncVat),
TotalTaxAmount: int(it.TotalPrice.TotalVat()),
ImageURL: fmt.Sprintf("https://www.elgiganten.se%s", it.Meta.Image),
})
}
total := cart.NewPrice()
total.Add(*grain.CartState.TotalPrice)
// Delivery lines
for _, d := range grain.Deliveries {
if d == nil || d.Price.IncVat <= 0 {
continue
}
//total.Add(d.Price)
lines = append(lines, &Line{
Type: "shipping_fee",
Reference: d.Provider,
Name: "Delivery",
Quantity: 1,
UnitPrice: int(d.Price.IncVat),
TaxRate: 2500,
QuantityUnit: "st",
TotalAmount: int(d.Price.IncVat),
TotalTaxAmount: int(d.Price.TotalVat()),
})
}
order := &CheckoutOrder{
PurchaseCountry: country,
PurchaseCurrency: currency,
Locale: locale,
OrderAmount: int(total.IncVat),
OrderTaxAmount: int(total.TotalVat()),
OrderLines: lines,
MerchantReference1: grain.Id.String(),
MerchantURLS: &CheckoutMerchantURLS{
Terms: fmt.Sprintf("%s/terms", meta.SiteUrl),
Checkout: fmt.Sprintf("%s/checkout?order_id={checkout.order.id}&provider=klarna", meta.SiteUrl),
Confirmation: fmt.Sprintf("%s/checkout?order_id={checkout.order.id}&provider=klarna", meta.SiteUrl),
Notification: "https://cart.k6n.net/payment/klarna/notification",
Validation: "https://cart.k6n.net/payment/klarna/validate",
Push: "https://cart.k6n.net/payment/klarna/push?order_id={checkout.order.id}",
},
}
payload, err := json.Marshal(order)
if err != nil {
return nil, nil, fmt.Errorf("marshal checkout order: %w", err)
}
return payload, order, nil
}
func GetCheckoutMetaFromRequest(r *http.Request) *CheckoutMeta {
host := getOriginalHost(r)
country := getCountryFromHost(host)
return &CheckoutMeta{
ClientIp: getClientIp(r),
SiteUrl: fmt.Sprintf("https://%s", host),
Country: country,
Currency: getCurrency(country),
Locale: getLocale(country),
}
}
func BuildAdyenCheckoutSession(grain *checkout.CheckoutGrain, meta *CheckoutMeta) (*adyenCheckout.CreateCheckoutSessionRequest, error) {
if grain == nil {
return nil, fmt.Errorf("nil grain")
}
if meta == nil {
return nil, fmt.Errorf("nil checkout meta")
}
currency := meta.Currency
if currency == "" {
currency = "SEK"
}
country := meta.Country
if country == "" {
country = "SE"
}
lineItems := make([]adyenCheckout.LineItem, 0, len(grain.CartState.Items)+len(grain.Deliveries))
// Item lines
for _, it := range grain.CartState.Items {
if it == nil {
continue
}
lineItems = append(lineItems, adyenCheckout.LineItem{
Quantity: common.PtrInt64(int64(it.Quantity)),
AmountIncludingTax: common.PtrInt64(it.TotalPrice.IncVat),
Description: common.PtrString(it.Meta.Name),
AmountExcludingTax: common.PtrInt64(it.TotalPrice.ValueExVat()),
TaxAmount: common.PtrInt64(it.TotalPrice.TotalVat()),
TaxPercentage: common.PtrInt64(int64(it.Tax)),
})
}
total := cart.NewPrice()
total.Add(*grain.CartState.TotalPrice)
// Delivery lines
for _, d := range grain.Deliveries {
if d == nil || d.Price.IncVat <= 0 {
continue
}
lineItems = append(lineItems, adyenCheckout.LineItem{
Quantity: common.PtrInt64(1),
AmountIncludingTax: common.PtrInt64(d.Price.IncVat),
Description: common.PtrString("Delivery"),
AmountExcludingTax: common.PtrInt64(d.Price.ValueExVat()),
TaxPercentage: common.PtrInt64(25),
})
}
return &adyenCheckout.CreateCheckoutSessionRequest{
Reference: grain.Id.String(),
Amount: adyenCheckout.Amount{
Value: total.IncVat,
Currency: currency,
},
CountryCode: common.PtrString(country),
MerchantAccount: "ElgigantenECOM",
Channel: common.PtrString("Web"),
ShopperIP: common.PtrString(meta.ClientIp),
ReturnUrl: fmt.Sprintf("%s/payment/adyen/return", meta.SiteUrl),
LineItems: lineItems,
}, nil
}

View File

@@ -1,63 +0,0 @@
package main
import (
"log"
"git.k6n.net/go-cart-actor/pkg/discovery"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
)
func GetDiscovery() discovery.Discovery {
if podIp == "" {
return nil
}
config, kerr := rest.InClusterConfig()
if kerr != nil {
log.Fatalf("Error creating kubernetes client: %v\n", kerr)
}
client, err := kubernetes.NewForConfig(config)
if err != nil {
log.Fatalf("Error creating client: %v\n", err)
}
timeout := int64(30)
return discovery.NewK8sDiscovery(client, v1.ListOptions{
LabelSelector: "actor-pool=checkout",
TimeoutSeconds: &timeout,
})
}
func UseDiscovery(pool discovery.DiscoveryTarget) {
go func(hw discovery.Discovery) {
if hw == nil {
log.Print("No discovery service available")
return
}
ch, err := hw.Watch()
if err != nil {
log.Printf("Discovery error: %v", err)
return
}
for evt := range ch {
if evt.Host == "" {
continue
}
switch evt.IsReady {
case false:
if pool.IsKnown(evt.Host) {
log.Printf("Host %s is not ready, removing", evt.Host)
pool.RemoveHost(evt.Host)
}
default:
if !pool.IsKnown(evt.Host) {
log.Printf("Discovered host %s", evt.Host)
pool.AddRemoteHost(evt.Host)
}
}
}
}(GetDiscovery())
}

View File

@@ -1,142 +0,0 @@
package main
import (
"context"
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"github.com/google/uuid"
)
type KlarnaClient struct {
Url string
UserName string
Password string
client *http.Client
}
func NewKlarnaClient(url, userName, password string) *KlarnaClient {
return &KlarnaClient{
Url: url,
UserName: userName,
Password: password,
client: &http.Client{},
}
}
const (
KlarnaPlaygroundUrl = "https://api.playground.klarna.com"
)
func (k *KlarnaClient) GetOrder(ctx context.Context, orderId string) (*CheckoutOrder, error) {
req, err := http.NewRequest("GET", k.Url+"/checkout/v3/orders/"+orderId, nil)
if err != nil {
return nil, err
}
spanCtx, span := tracer.Start(ctx, "Get klarna order")
defer span.End()
req = req.WithContext(spanCtx)
req.Header.Add("Content-Type", "application/json")
req.SetBasicAuth(k.UserName, k.Password)
res, err := k.client.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
return k.getOrderResponse(res)
}
func (k *KlarnaClient) getOrderResponse(res *http.Response) (*CheckoutOrder, error) {
var err error
var klarnaOrderResponse CheckoutOrder
if res.StatusCode >= 200 && res.StatusCode <= 299 {
err = json.NewDecoder(res.Body).Decode(&klarnaOrderResponse)
if err != nil {
return nil, err
}
return &klarnaOrderResponse, nil
}
body, err := io.ReadAll(res.Body)
if err == nil {
log.Println(string(body))
}
return nil, fmt.Errorf("%s", res.Status)
}
func (k *KlarnaClient) CreateOrder(ctx context.Context, reader io.Reader) (*CheckoutOrder, error) {
//bytes.NewReader(reply.Payload)
req, err := http.NewRequest("POST", k.Url+"/checkout/v3/orders", reader)
if err != nil {
return nil, err
}
spanCtx, span := tracer.Start(ctx, "Create klarna order")
defer span.End()
req = req.WithContext(spanCtx)
req.Header.Add("Content-Type", "application/json")
req.SetBasicAuth(k.UserName, k.Password)
res, err := k.client.Do(req)
if nil != err {
return nil, err
}
defer res.Body.Close()
return k.getOrderResponse(res)
}
func (k *KlarnaClient) UpdateOrder(ctx context.Context, orderId string, reader io.Reader) (*CheckoutOrder, error) {
//bytes.NewReader(reply.Payload)
req, err := http.NewRequest("POST", fmt.Sprintf("%s/checkout/v3/orders/%s", k.Url, orderId), reader)
if err != nil {
return nil, err
}
spanCtx, span := tracer.Start(ctx, "Update klarna order")
defer span.End()
req = req.WithContext(spanCtx)
req.Header.Add("Content-Type", "application/json")
req.SetBasicAuth(k.UserName, k.Password)
res, err := k.client.Do(req)
if nil != err {
return nil, err
}
defer res.Body.Close()
return k.getOrderResponse(res)
}
func (k *KlarnaClient) AbortOrder(ctx context.Context, orderId string) error {
req, err := http.NewRequest("POST", fmt.Sprintf("%s/checkout/v3/orders/%s/abort", k.Url, orderId), nil)
if err != nil {
return err
}
spanCtx, span := tracer.Start(ctx, "Abort klarna order")
defer span.End()
req = req.WithContext(spanCtx)
req.SetBasicAuth(k.UserName, k.Password)
_, err = k.client.Do(req)
return err
}
// ordermanagement/v1/orders/{order_id}/acknowledge
func (k *KlarnaClient) AcknowledgeOrder(ctx context.Context, orderId string) error {
req, err := http.NewRequest("POST", fmt.Sprintf("%s/ordermanagement/v1/orders/%s/acknowledge", k.Url, orderId), nil)
if err != nil {
return err
}
spanCtx, span := tracer.Start(ctx, "Acknowledge klarna order")
defer span.End()
req = req.WithContext(spanCtx)
id := uuid.New()
req.SetBasicAuth(k.UserName, k.Password)
req.Header.Add("Klarna-Idempotency-Key", id.String())
_, err = k.client.Do(req)
return err
}

View File

@@ -1,277 +0,0 @@
package main
import (
"context"
"encoding/json"
"fmt"
"log"
"net/http"
"time"
"git.k6n.net/go-cart-actor/pkg/cart"
"git.k6n.net/go-cart-actor/pkg/checkout"
messages "git.k6n.net/go-cart-actor/proto/checkout"
"github.com/matst80/go-redis-inventory/pkg/inventory"
"google.golang.org/protobuf/types/known/timestamppb"
)
/*
*
*
* s.CheckoutHandler(func(order *CheckoutOrder, w http.ResponseWriter) error {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Header().Set("Permissions-Policy", "payment=(self \"https://js.stripe.com\" \"https://m.stripe.network\" \"https://js.playground.kustom.co\")")
w.WriteHeader(http.StatusOK)
_, err := fmt.Fprintf(w, tpl, order.HTMLSnippet)
return err
})
*/
// func (s *CheckoutPoolServer) KlarnaHtmlCheckoutHandler(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
// orderId := r.URL.Query().Get("order_id")
// var order *CheckoutOrder
// var err error
// if orderId == "" {
// order, err = s.CreateOrUpdateCheckout(r, checkoutId)
// if err != nil {
// logger.Error("unable to create klarna session", "error", err)
// return err
// }
// // s.ApplyKlarnaPaymentStarted(r.Context(), order, checkoutId)
// }
// order, err = s.klarnaClient.GetOrder(r.Context(), orderId)
// if err != nil {
// return err
// }
// w.Header().Set("Content-Type", "text/html; charset=utf-8")
// w.Header().Set("Permissions-Policy", "payment=(self \"https://js.stripe.com\" \"https://m.stripe.network\" \"https://js.playground.kustom.co\")")
// w.WriteHeader(http.StatusOK)
// _, err = fmt.Fprintf(w, tpl, order.HTMLSnippet)
// return err
// }
// func (s *CheckoutPoolServer) KlarnaSessionHandler(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
// orderId := r.URL.Query().Get("order_id")
// var order *CheckoutOrder
// var err error
// if orderId == "" {
// order, err = s.CreateOrUpdateCheckout(r, checkoutId)
// if err != nil {
// logger.Error("unable to create klarna session", "error", err)
// return err
// }
// // s.ApplyKlarnaPaymentStarted(r.Context(), order, checkoutId)
// }
// order, err = s.klarnaClient.GetOrder(r.Context(), orderId)
// if err != nil {
// return err
// }
// w.Header().Set("Content-Type", "application/json; charset=utf-8")
// return json.NewEncoder(w).Encode(order)
// }
func (s *CheckoutPoolServer) KlarnaConfirmationHandler(w http.ResponseWriter, r *http.Request) {
orderId := r.PathValue("order_id")
order, err := s.klarnaClient.GetOrder(r.Context(), orderId)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
// Apply ConfirmationViewed mutation
cartId, ok := cart.ParseCartId(order.MerchantReference1)
if ok {
s.Apply(r.Context(), uint64(cartId), &messages.ConfirmationViewed{})
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
if order.Status == "checkout_complete" {
http.SetCookie(w, &http.Cookie{
Name: "cartid",
Value: "",
Path: "/",
Secure: true,
HttpOnly: true,
Expires: time.Unix(0, 0),
SameSite: http.SameSiteLaxMode,
})
}
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, tpl, order.HTMLSnippet)
}
func (s *CheckoutPoolServer) KlarnaValidationHandler(w http.ResponseWriter, r *http.Request) {
log.Printf("Klarna order validation, method: %s", r.Method)
if r.Method != "POST" {
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
order := &CheckoutOrder{}
err := json.NewDecoder(r.Body).Decode(order)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
logger.InfoContext(r.Context(), "Klarna order validation received", "order_id", order.ID, "cart_id", order.MerchantReference1)
grain, err := s.getGrainFromKlarnaOrder(r.Context(), order)
if err != nil {
logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
w.WriteHeader(http.StatusInternalServerError)
return
}
s.reserveInventory(r.Context(), grain)
w.WriteHeader(http.StatusOK)
}
func (s *CheckoutPoolServer) KlarnaNotificationHandler(w http.ResponseWriter, r *http.Request) {
log.Printf("Klarna order notification, method: %s", r.Method)
logger.InfoContext(r.Context(), "Klarna order notification received", "method", r.Method)
if r.Method != "POST" {
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
order := &CheckoutOrder{}
err := json.NewDecoder(r.Body).Decode(order)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
log.Printf("Klarna order notification: %s", order.ID)
logger.InfoContext(r.Context(), "Klarna order notification received", "order_id", order.ID)
w.WriteHeader(http.StatusOK)
}
func (s *CheckoutPoolServer) KlarnaPushHandler(w http.ResponseWriter, r *http.Request) {
log.Printf("Klarna order confirmation push, method: %s", r.Method)
if r.Method != http.MethodPost {
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
orderId := r.URL.Query().Get("order_id")
log.Printf("Order confirmation push: %s", orderId)
order, err := s.klarnaClient.GetOrder(r.Context(), orderId)
if err != nil {
log.Printf("Error creating request: %v\n", err)
w.WriteHeader(http.StatusInternalServerError)
return
}
grain, err := s.getGrainFromKlarnaOrder(r.Context(), order)
if err != nil {
logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
w.WriteHeader(http.StatusInternalServerError)
return
}
if s.inventoryService != nil {
inventoryRequests := getInventoryRequests(grain.CartState.Items)
err = s.inventoryService.ReserveInventory(r.Context(), inventoryRequests...)
if err != nil {
logger.WarnContext(r.Context(), "placeorder inventory reservation failed")
w.WriteHeader(http.StatusNotAcceptable)
return
}
s.Apply(r.Context(), uint64(grain.Id), &messages.InventoryReserved{
Id: grain.Id.String(),
Status: "success",
})
}
s.ApplyAnywhere(r.Context(), grain.Id, &messages.PaymentCompleted{
PaymentId: orderId,
Status: "completed",
ProcessorReference: &order.ID,
Amount: int64(order.OrderAmount),
Currency: order.PurchaseCurrency,
CompletedAt: timestamppb.Now(),
})
// err = confirmOrder(r.Context(), order, orderHandler)
// if err != nil {
// log.Printf("Error confirming order: %v\n", err)
// w.WriteHeader(http.StatusInternalServerError)
// return
// }
// err = triggerOrderCompleted(r.Context(), a.server, order)
// if err != nil {
// log.Printf("Error processing cart message: %v\n", err)
// w.WriteHeader(http.StatusInternalServerError)
// return
// }
err = s.klarnaClient.AcknowledgeOrder(r.Context(), orderId)
if err != nil {
log.Printf("Error acknowledging order: %v\n", err)
}
w.WriteHeader(http.StatusOK)
}
var tpl = `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>s10r testing - checkout</title>
</head>
<body>
%s
</body>
</html>
`
func getLocationId(item *cart.CartItem) inventory.LocationID {
if item.StoreId == nil || *item.StoreId == "" {
return "se"
}
return inventory.LocationID(*item.StoreId)
}
func getInventoryRequests(items []*cart.CartItem) []inventory.ReserveRequest {
var requests []inventory.ReserveRequest
for _, item := range items {
if item == nil {
continue
}
requests = append(requests, inventory.ReserveRequest{
InventoryReference: &inventory.InventoryReference{
SKU: inventory.SKU(item.Sku),
LocationID: getLocationId(item),
},
Quantity: uint32(item.Quantity),
})
}
return requests
}
func (a *CheckoutPoolServer) getGrainFromKlarnaOrder(ctx context.Context, order *CheckoutOrder) (*checkout.CheckoutGrain, error) {
cartId, ok := cart.ParseCartId(order.MerchantReference1)
if !ok {
return nil, fmt.Errorf("invalid cart id in order reference: %s", order.MerchantReference1)
}
grain, err := a.GetAnywhere(ctx, cartId)
if err != nil {
return nil, fmt.Errorf("failed to get cart grain: %w", err)
}
return grain, nil
}

View File

@@ -1,169 +0,0 @@
package main
type (
LineType string
// CheckoutOrder type is the request structure to create a new order from the Checkout API
CheckoutOrder struct {
ID string `json:"order_id,omitempty"`
PurchaseCountry string `json:"purchase_country"`
PurchaseCurrency string `json:"purchase_currency"`
Locale string `json:"locale"`
Status string `json:"status,omitempty"`
BillingAddress *Address `json:"billing_address,omitempty"`
ShippingAddress *Address `json:"shipping_address,omitempty"`
OrderAmount int `json:"order_amount"`
OrderTaxAmount int `json:"order_tax_amount"`
OrderLines []*Line `json:"order_lines"`
Customer *CheckoutCustomer `json:"customer,omitempty"`
MerchantURLS *CheckoutMerchantURLS `json:"merchant_urls"`
HTMLSnippet string `json:"html_snippet,omitempty"`
MerchantReference1 string `json:"merchant_reference1,omitempty"`
MerchantReference2 string `json:"merchant_reference2,omitempty"`
StartedAt string `json:"started_at,omitempty"`
CompletedAt string `json:"completed_at,omitempty"`
LastModifiedAt string `json:"last_modified_at,omitempty"`
Options *CheckoutOptions `json:"options,omitempty"`
Attachment *Attachment `json:"attachment,omitempty"`
ExternalPaymentMethods []*PaymentProvider `json:"external_payment_methods,omitempty"`
ExternalCheckouts []*PaymentProvider `json:"external_checkouts,omitempty"`
ShippingCountries []string `json:"shipping_countries,omitempty"`
ShippingOptions []*ShippingOption `json:"shipping_options,omitempty"`
MerchantData string `json:"merchant_data,omitempty"`
GUI *GUI `json:"gui,omitempty"`
MerchantRequested *AdditionalCheckBox `json:"merchant_requested,omitempty"`
SelectedShippingOption *ShippingOption `json:"selected_shipping_option,omitempty"`
ErrorCode string `json:"error_code,omitempty"`
ErrorMessages []string `json:"error_messages,omitempty"`
}
// GUI type wraps the GUI options
GUI struct {
Options []string `json:"options,omitempty"`
}
// ShippingOption type is part of the CheckoutOrder structure, represent the shipping options field
ShippingOption struct {
ID string `json:"id"`
Name string `json:"name"`
Description string `json:"description,omitempty"`
Promo string `json:"promo,omitempty"`
Price int `json:"price"`
TaxAmount int `json:"tax_amount"`
TaxRate int `json:"tax_rate"`
Preselected bool `json:"preselected,omitempty"`
ShippingMethod string `json:"shipping_method,omitempty"`
}
// PaymentProvider type is part of the CheckoutOrder structure, represent the ExternalPaymentMethods and
// ExternalCheckouts field
PaymentProvider struct {
Name string `json:"name"`
RedirectURL string `json:"redirect_url"`
ImageURL string `json:"image_url,omitempty"`
Fee int `json:"fee,omitempty"`
Description string `json:"description,omitempty"`
Countries []string `json:"countries,omitempty"`
}
Attachment struct {
ContentType string `json:"content_type"`
Body string `json:"body"`
}
CheckoutOptions struct {
AcquiringChannel string `json:"acquiring_channel,omitempty"`
AllowSeparateShippingAddress bool `json:"allow_separate_shipping_address,omitempty"`
ColorButton string `json:"color_button,omitempty"`
ColorButtonText string `json:"color_button_text,omitempty"`
ColorCheckbox string `json:"color_checkbox,omitempty"`
ColorCheckboxCheckmark string `json:"color_checkbox_checkmark,omitempty"`
ColorHeader string `json:"color_header,omitempty"`
ColorLink string `json:"color_link,omitempty"`
DateOfBirthMandatory bool `json:"date_of_birth_mandatory,omitempty"`
ShippingDetails string `json:"shipping_details,omitempty"`
TitleMandatory bool `json:"title_mandatory,omitempty"`
AdditionalCheckbox *AdditionalCheckBox `json:"additional_checkbox"`
RadiusBorder string `json:"radius_border,omitempty"`
ShowSubtotalDetail bool `json:"show_subtotal_detail,omitempty"`
RequireValidateCallbackSuccess bool `json:"require_validate_callback_success,omitempty"`
AllowGlobalBillingCountries bool `json:"allow_global_billing_countries,omitempty"`
}
AdditionalCheckBox struct {
Text string `json:"text"`
Checked bool `json:"checked"`
Required bool `json:"required"`
}
CheckoutMerchantURLS struct {
// URL of merchant terms and conditions. Should be different than checkout, confirmation and push URLs.
// (max 2000 characters)
Terms string `json:"terms"`
// URL of merchant checkout page. Should be different than terms, confirmation and push URLs.
// (max 2000 characters)
Checkout string `json:"checkout"`
// URL of merchant confirmation page. Should be different than checkout and confirmation URLs.
// (max 2000 characters)
Confirmation string `json:"confirmation"`
// URL that will be requested when an order is completed. Should be different than checkout and
// confirmation URLs. (max 2000 characters)
Push string `json:"push"`
// URL that will be requested for final merchant validation. (must be https, max 2000 characters)
Validation string `json:"validation,omitempty"`
// URL for shipping option update. (must be https, max 2000 characters)
ShippingOptionUpdate string `json:"shipping_option_update,omitempty"`
// URL for shipping, tax and purchase currency updates. Will be called on address changes.
// (must be https, max 2000 characters)
AddressUpdate string `json:"address_update,omitempty"`
// URL for notifications on pending orders. (max 2000 characters)
Notification string `json:"notification,omitempty"`
// URL for shipping, tax and purchase currency updates. Will be called on purchase country changes.
// (must be https, max 2000 characters)
CountryChange string `json:"country_change,omitempty"`
}
CheckoutCustomer struct {
// DateOfBirth in string representation 2006-01-02
DateOfBirth string `json:"date_of_birth"`
}
// Address type define the address object (json serializable) being used for the API to represent billing &
// shipping addresses
Address struct {
GivenName string `json:"given_name,omitempty"`
FamilyName string `json:"family_name,omitempty"`
Email string `json:"email,omitempty"`
Title string `json:"title,omitempty"`
StreetAddress string `json:"street_address,omitempty"`
StreetAddress2 string `json:"street_address2,omitempty"`
PostalCode string `json:"postal_code,omitempty"`
City string `json:"city,omitempty"`
Region string `json:"region,omitempty"`
Phone string `json:"phone,omitempty"`
Country string `json:"country,omitempty"`
}
Line struct {
Type string `json:"type,omitempty"`
Reference string `json:"reference,omitempty"`
Name string `json:"name"`
Quantity int `json:"quantity"`
QuantityUnit string `json:"quantity_unit,omitempty"`
UnitPrice int `json:"unit_price"`
TaxRate int `json:"tax_rate"`
TotalAmount int `json:"total_amount"`
TotalDiscountAmount int `json:"total_discount_amount,omitempty"`
TotalTaxAmount int `json:"total_tax_amount"`
MerchantData string `json:"merchant_data,omitempty"`
ProductURL string `json:"product_url,omitempty"`
ImageURL string `json:"image_url,omitempty"`
}
)

View File

@@ -1,201 +0,0 @@
package main
import (
"context"
"fmt"
"log"
"net"
"net/http"
"os"
"os/signal"
"time"
"git.k6n.net/go-cart-actor/pkg/actor"
"git.k6n.net/go-cart-actor/pkg/checkout"
"git.k6n.net/go-cart-actor/pkg/proxy"
"github.com/adyen/adyen-go-api-library/v21/src/adyen"
"github.com/adyen/adyen-go-api-library/v21/src/common"
"github.com/matst80/go-redis-inventory/pkg/inventory"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/redis/go-redis/v9"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
)
var (
grainSpawns = promauto.NewCounter(prometheus.CounterOpts{
Name: "checkout_grain_spawned_total",
Help: "The total number of spawned checkout grains",
})
)
func init() {
os.Mkdir("data", 0755)
}
type App struct {
pool *actor.SimpleGrainPool[checkout.CheckoutGrain]
server *CheckoutPoolServer
klarnaClient *KlarnaClient
cartClient *CartClient // For internal communication to cart
}
var podIp = os.Getenv("POD_IP")
var name = os.Getenv("POD_NAME")
var amqpUrl = os.Getenv("AMQP_URL")
var redisAddress = os.Getenv("REDIS_ADDRESS")
var redisPassword = os.Getenv("REDIS_PASSWORD")
var cartInternalUrl = os.Getenv("CART_INTERNAL_URL") // e.g., http://cart-service:8081
func main() {
controlPlaneConfig := actor.DefaultServerConfig()
reg := checkout.NewCheckoutMutationRegistry(checkout.NewCheckoutMutationContext())
reg.RegisterProcessor(
actor.NewMutationProcessor(func(ctx context.Context, g *checkout.CheckoutGrain) error {
g.Version++
return nil
}),
)
rdb := redis.NewClient(&redis.Options{
Addr: redisAddress,
Password: redisPassword,
DB: 0,
})
inventoryService, err := inventory.NewRedisInventoryService(rdb)
if err != nil {
log.Fatalf("Error creating inventory service: %v\n", err)
}
diskStorage := actor.NewDiskStorage[checkout.CheckoutGrain]("data", reg)
poolConfig := actor.GrainPoolConfig[checkout.CheckoutGrain]{
MutationRegistry: reg,
Storage: diskStorage,
Spawn: func(ctx context.Context, id uint64) (actor.Grain[checkout.CheckoutGrain], error) {
_, span := tracer.Start(ctx, fmt.Sprintf("Spawn checkout id %d", id))
defer span.End()
grainSpawns.Inc()
ret := checkout.NewCheckoutGrain(id, 0, 0, time.Now(), nil) // version to be set later
// Load persisted events/state for this checkout if present
if err := diskStorage.LoadEvents(ctx, id, ret); err != nil {
// Return the grain along with error (e.g., not found) so callers can decide
return ret, err
}
return ret, nil
},
Destroy: func(grain actor.Grain[checkout.CheckoutGrain]) error {
return nil
},
SpawnHost: func(host string) (actor.Host[checkout.CheckoutGrain], error) {
return proxy.NewRemoteHost[checkout.CheckoutGrain](host)
},
TTL: 1 * time.Hour, // Longer TTL for checkout
PoolSize: 65535,
Hostname: podIp,
}
pool, err := actor.NewSimpleGrainPool(poolConfig)
if err != nil {
log.Fatalf("Error creating checkout pool: %v\n", err)
}
adyenClient := adyen.NewClient(&common.Config{
ApiKey: os.Getenv("ADYEN_API_KEY"),
Environment: common.TestEnv,
})
klarnaClient := NewKlarnaClient(KlarnaPlaygroundUrl, os.Getenv("KLARNA_API_USERNAME"), os.Getenv("KLARNA_API_PASSWORD"))
cartClient := NewCartClient(cartInternalUrl)
syncedServer := NewCheckoutPoolServer(pool, fmt.Sprintf("%s, %s", name, podIp), klarnaClient, cartClient, adyenClient)
syncedServer.inventoryService = inventoryService
mux := http.NewServeMux()
debugMux := http.NewServeMux()
if amqpUrl == "" {
log.Fatalf("no connection to amqp defined")
}
grpcSrv, err := actor.NewControlServer[checkout.CheckoutGrain](controlPlaneConfig, pool)
if err != nil {
log.Fatalf("Error starting control plane gRPC server: %v\n", err)
}
defer grpcSrv.GracefulStop()
UseDiscovery(pool)
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
defer stop()
otelShutdown, err := setupOTelSDK(ctx)
if err != nil {
log.Fatalf("Unable to start otel %v", err)
}
syncedServer.Serve(mux)
mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
grainCount, capacity := pool.LocalUsage()
if grainCount >= capacity {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("grain pool at capacity"))
return
}
if !pool.IsHealthy() {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("control plane not healthy"))
return
}
w.WriteHeader(http.StatusOK)
w.Write([]byte("ok"))
})
mux.HandleFunc("/readyz", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("ok"))
})
mux.HandleFunc("/livez", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("ok"))
})
mux.HandleFunc("/version", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("1.0.0"))
})
srv := &http.Server{
Addr: ":8080",
BaseContext: func(net.Listener) context.Context { return ctx },
ReadTimeout: 10 * time.Second,
WriteTimeout: 20 * time.Second,
Handler: otelhttp.NewHandler(mux, "/"),
}
defer func() {
fmt.Println("Shutting down due to signal")
otelShutdown(context.Background())
diskStorage.Close()
pool.Close()
}()
srvErr := make(chan error, 1)
go func() {
srvErr <- srv.ListenAndServe()
}()
log.Print("Checkout server started at port 8080")
go http.ListenAndServe(":8081", debugMux)
select {
case err = <-srvErr:
log.Fatalf("Unable to start server: %v", err)
case <-ctx.Done():
stop()
}
}

View File

@@ -1,117 +0,0 @@
package main
import (
"context"
"errors"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/log/global"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/log"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/trace"
)
// setupOTelSDK bootstraps the OpenTelemetry pipeline.
// If it does not return an error, make sure to call shutdown for proper cleanup.
func setupOTelSDK(ctx context.Context) (func(context.Context) error, error) {
var shutdownFuncs []func(context.Context) error
var err error
// shutdown calls cleanup functions registered via shutdownFuncs.
// The errors from the calls are joined.
// Each registered cleanup will be invoked once.
shutdown := func(ctx context.Context) error {
var err error
for _, fn := range shutdownFuncs {
err = errors.Join(err, fn(ctx))
}
shutdownFuncs = nil
return err
}
// handleErr calls shutdown for cleanup and makes sure that all errors are returned.
handleErr := func(inErr error) {
err = errors.Join(inErr, shutdown(ctx))
}
// Set up propagator.
prop := newPropagator()
otel.SetTextMapPropagator(prop)
// Set up trace provider.
tracerProvider, err := newTracerProvider()
if err != nil {
handleErr(err)
return shutdown, err
}
shutdownFuncs = append(shutdownFuncs, tracerProvider.Shutdown)
otel.SetTracerProvider(tracerProvider)
// Set up meter provider.
meterProvider, err := newMeterProvider()
if err != nil {
handleErr(err)
return shutdown, err
}
shutdownFuncs = append(shutdownFuncs, meterProvider.Shutdown)
otel.SetMeterProvider(meterProvider)
// Set up logger provider.
loggerProvider, err := newLoggerProvider()
if err != nil {
handleErr(err)
return shutdown, err
}
shutdownFuncs = append(shutdownFuncs, loggerProvider.Shutdown)
global.SetLoggerProvider(loggerProvider)
return shutdown, err
}
func newPropagator() propagation.TextMapPropagator {
return propagation.NewCompositeTextMapPropagator(
propagation.TraceContext{},
propagation.Baggage{},
)
}
func newTracerProvider() (*trace.TracerProvider, error) {
traceExporter, err := otlptracegrpc.New(context.Background())
if err != nil {
return nil, err
}
tracerProvider := trace.NewTracerProvider(
trace.WithBatcher(traceExporter,
// Default is 5s. Set to 1s for demonstrative purposes.
trace.WithBatchTimeout(time.Second)),
)
return tracerProvider, nil
}
func newMeterProvider() (*metric.MeterProvider, error) {
exporter, err := otlpmetricgrpc.New(context.Background())
if err != nil {
return nil, err
}
provider := metric.NewMeterProvider(metric.WithReader(metric.NewPeriodicReader(exporter)))
return provider, nil
}
func newLoggerProvider() (*log.LoggerProvider, error) {
logExporter, err := otlploggrpc.New(context.Background())
if err != nil {
return nil, err
}
loggerProvider := log.NewLoggerProvider(
log.WithProcessor(log.NewBatchProcessor(logExporter)),
)
return loggerProvider, nil
}

View File

@@ -1,557 +0,0 @@
package main
import (
"bytes"
"context"
"encoding/json"
"errors"
"log"
"net/http"
"os"
"strconv"
"time"
"git.k6n.net/go-cart-actor/pkg/actor"
"git.k6n.net/go-cart-actor/pkg/cart"
"git.k6n.net/go-cart-actor/pkg/checkout"
messages "git.k6n.net/go-cart-actor/proto/checkout"
adyen "github.com/adyen/adyen-go-api-library/v21/src/adyen"
"github.com/matst80/go-redis-inventory/pkg/inventory"
amqp "github.com/rabbitmq/amqp091-go"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"go.opentelemetry.io/contrib/bridges/otelslog"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"google.golang.org/protobuf/types/known/timestamppb"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/trace"
)
var (
grainMutations = promauto.NewCounter(prometheus.CounterOpts{
Name: "checkout_grain_mutations_total",
Help: "The total number of mutations",
})
grainLookups = promauto.NewCounter(prometheus.CounterOpts{
Name: "checkout_grain_lookups_total",
Help: "The total number of lookups",
})
)
type CheckoutPoolServer struct {
actor.GrainPool[checkout.CheckoutGrain]
pod_name string
klarnaClient *KlarnaClient
adyenClient *adyen.APIClient
cartClient *CartClient
inventoryService *inventory.RedisInventoryService
}
func NewCheckoutPoolServer(pool actor.GrainPool[checkout.CheckoutGrain], pod_name string, klarnaClient *KlarnaClient, cartClient *CartClient, adyenClient *adyen.APIClient) *CheckoutPoolServer {
srv := &CheckoutPoolServer{
GrainPool: pool,
pod_name: pod_name,
klarnaClient: klarnaClient,
cartClient: cartClient,
adyenClient: adyenClient,
}
return srv
}
func (s *CheckoutPoolServer) ApplyLocal(ctx context.Context, id checkout.CheckoutId, mutation ...proto.Message) (*actor.MutationResult[checkout.CheckoutGrain], error) {
return s.Apply(ctx, uint64(id), mutation...)
}
func (s *CheckoutPoolServer) GetCheckoutHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
grain, err := s.Get(r.Context(), uint64(id))
if err != nil {
return err
}
return s.WriteResult(w, grain)
}
func (s *CheckoutPoolServer) SetDeliveryHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
var msg messages.SetDelivery
if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
return err
}
result, err := s.ApplyLocal(r.Context(), id, &msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) RemoveDeliveryHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
deliveryId := r.PathValue("id")
uintDeliveryId, err := strconv.ParseUint(deliveryId, 10, 64)
if err != nil {
return err
}
msg := &messages.RemoveDelivery{
Id: uint32(uintDeliveryId),
}
result, err := s.ApplyLocal(r.Context(), id, msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) SetPickupPointHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
var msg messages.SetPickupPoint
if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
return err
}
result, err := s.ApplyLocal(r.Context(), id, &msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) InitializeCheckoutHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
var msg messages.InitializeCheckout
if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
return err
}
result, err := s.ApplyLocal(r.Context(), id, &msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) InventoryReservedHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
var msg messages.InventoryReserved
if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
return err
}
result, err := s.ApplyLocal(r.Context(), id, &msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) OrderCreatedHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
var msg messages.OrderCreated
if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
return err
}
result, err := s.ApplyLocal(r.Context(), id, &msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) ConfirmationViewedHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
var msg messages.ConfirmationViewed
if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
return err
}
result, err := s.ApplyLocal(r.Context(), id, &msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) ContactDetailsUpdatedHandler(w http.ResponseWriter, r *http.Request, id checkout.CheckoutId) error {
var msg messages.ContactDetailsUpdated
if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
return err
}
result, err := s.ApplyLocal(r.Context(), id, &msg)
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) CancelPaymentHandler(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
paymentId := r.PathValue("id")
result, err := s.ApplyLocal(r.Context(), checkoutId, &messages.CancelPayment{
PaymentId: paymentId,
CancelledAt: timestamppb.New(time.Now()),
})
if err != nil {
return err
}
return s.WriteResult(w, result)
}
func (s *CheckoutPoolServer) StartCheckoutHandler(w http.ResponseWriter, r *http.Request) {
cartIdStr := r.PathValue("cartid")
if cartIdStr == "" {
http.Error(w, "cart id required", http.StatusBadRequest)
return
}
cartId, ok := cart.ParseCartId(cartIdStr)
if !ok {
http.Error(w, "invalid cart id", http.StatusBadRequest)
return
}
// Fetch cart state from cart service
cartGrain, err := s.cartClient.getCartGrain(r.Context(), cartId)
if err != nil {
logger.Error("failed to fetch cart", "error", err, "cartId", cartId)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Serialize cart state to Any
cartStateBytes, err := json.Marshal(cartGrain)
if err != nil {
logger.Error("failed to marshal cart state", "error", err)
http.Error(w, "failed to process cart state", http.StatusInternalServerError)
return
}
// Create checkout with same ID as cart
var checkoutId checkout.CheckoutId = cart.MustNewCartId()
cookie, err := r.Cookie(checkoutCookieName)
if err == nil {
parsed, ok := cart.ParseCartId(cookie.Value)
if ok {
checkoutId = parsed
}
}
// Initialize checkout with cart state wrapped in Any
cartStateAny := &messages.InitializeCheckout{
OrderId: "",
CartId: uint64(cartId),
Version: uint32(cartGrain.Version),
CartState: &anypb.Any{
TypeUrl: "type.googleapis.com/cart.CartGrain",
Value: cartStateBytes,
},
}
result, err := s.ApplyLocal(r.Context(), checkoutId, cartStateAny)
if err != nil {
setCheckoutCookie(w, 0, r.TLS != nil)
logger.Error("failed to initialize checkout", "error", err)
http.Error(w, "failed to initialize checkout", http.StatusInternalServerError)
return
}
// Set checkout cookie
setCheckoutCookie(w, checkoutId, r.TLS != nil)
if err := s.WriteResult(w, &result.Result); err != nil {
logger.Error("failed to write result", "error", err)
}
}
func (s *CheckoutPoolServer) WriteResult(w http.ResponseWriter, result any) error {
w.Header().Set("Content-Type", "application/json")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("X-Pod-Name", s.pod_name)
if result == nil {
w.WriteHeader(http.StatusInternalServerError)
return nil
}
w.WriteHeader(http.StatusOK)
enc := json.NewEncoder(w)
err := enc.Encode(result)
return err
}
func (s *CheckoutPoolServer) CreateOrUpdateCheckout(r *http.Request, grain *checkout.CheckoutGrain, orderId *string) (*CheckoutOrder, error) {
meta := GetCheckoutMetaFromRequest(r)
payload, _, err := BuildCheckoutOrderPayload(grain, meta)
if err != nil {
return nil, err
}
var payment *checkout.Payment
if orderId != nil {
payment, _ = grain.FindPayment(*orderId)
}
if payment != nil && payment.PaymentId != "" {
return s.klarnaClient.UpdateOrder(r.Context(), payment.PaymentId, bytes.NewReader(payload))
} else {
return s.klarnaClient.CreateOrder(r.Context(), bytes.NewReader(payload))
}
}
func (s *CheckoutPoolServer) ApplyKlarnaPaymentStarted(ctx context.Context, klarnaOrder *CheckoutOrder, id checkout.CheckoutId) (*actor.MutationResult[checkout.CheckoutGrain], error) {
method := "checkout"
return s.ApplyLocal(ctx, id, &messages.PaymentStarted{
PaymentId: klarnaOrder.ID,
Amount: int64(klarnaOrder.OrderAmount),
Currency: klarnaOrder.PurchaseCurrency,
Provider: "klarna",
Method: &method,
StartedAt: timestamppb.New(time.Now()),
})
}
var (
tracer = otel.Tracer(name)
hmacKey = os.Getenv("ADYEN_HMAC")
meter = otel.Meter(name)
logger = otelslog.NewLogger(name)
proxyCalls metric.Int64Counter
)
func init() {
var err error
proxyCalls, err = meter.Int64Counter("proxy.calls",
metric.WithDescription("Number of proxy calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
}
func (s *CheckoutPoolServer) GetAnywhere(ctx context.Context, checkoutId cart.CartId) (*checkout.CheckoutGrain, error) {
id := uint64(checkoutId)
if host, isOnOtherHost := s.OwnerHost(id); isOnOtherHost {
return host.Get(ctx, id)
}
return s.Get(ctx, id)
}
func (s *CheckoutPoolServer) ApplyAnywhere(ctx context.Context, checkoutId cart.CartId, msgs ...proto.Message) error {
id := uint64(checkoutId)
if host, isOnOtherHost := s.OwnerHost(id); isOnOtherHost {
_, err := host.Apply(ctx, id, msgs...)
return err
}
_, err := s.Apply(ctx, id, msgs...)
return err
}
type StartPayment struct {
Provider string `json:"provider"`
Method string `json:"method,omitempty"`
}
func (s *CheckoutPoolServer) GetPaymentSessionHandler(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
paymentId := r.PathValue("id")
grain, err := s.Get(r.Context(), uint64(checkoutId))
if err != nil {
return err
}
payment, ok := grain.FindPayment(paymentId)
if !ok {
http.Error(w, "payment not found", http.StatusNotFound)
return nil
}
switch payment.Provider {
case "adyen":
payload := &SessionRequest{
SessionResult: "",
}
if r.Method != http.MethodGet {
if err := json.NewDecoder(r.Body).Decode(payload); err != nil {
return err
}
}
service := s.adyenClient.Checkout()
req := service.PaymentsApi.GetResultOfPaymentSessionInput(paymentId).SessionResult(payload.SessionResult)
res, _, err := service.PaymentsApi.GetResultOfPaymentSession(r.Context(), req)
if err != nil {
return err
}
if res.Status != nil && *res.Status == "completed" {
_, err := s.ApplyLocal(r.Context(), checkoutId, &messages.PaymentCompleted{
PaymentId: paymentId,
Status: *res.Status,
ProcessorReference: res.Id,
CompletedAt: timestamppb.Now(),
})
if err != nil {
logger.Error("unable to apply payment started mutation", "error", err)
return err
}
}
return s.WriteResult(w, res)
case "klarna":
current, err := s.klarnaClient.GetOrder(r.Context(), paymentId)
if err != nil {
return err
}
return s.WriteResult(w, current)
}
return errors.New("unsupported payment provider")
}
func (s *CheckoutPoolServer) StartPaymentHandler(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
grain, err := s.Get(r.Context(), uint64(checkoutId))
if err != nil {
return err
}
payload := &StartPayment{}
if err := json.NewDecoder(r.Body).Decode(payload); err != nil {
return err
}
switch payload.Provider {
case "adyen":
meta := GetCheckoutMetaFromRequest(r)
sessionData, err := BuildAdyenCheckoutSession(grain, meta)
if err != nil {
logger.Error("unable to build adyen session", "error", err)
return err
}
service := s.adyenClient.Checkout()
req := service.PaymentsApi.SessionsInput().CreateCheckoutSessionRequest(*sessionData)
session, _, err := service.PaymentsApi.Sessions(r.Context(), req)
if err != nil {
logger.Error("unable to create adyen session", "error", err)
return err
}
sessionBytes, err := json.Marshal(session)
if err != nil {
logger.Error("unable to marshal session", "error", err)
return err
}
// Apply PaymentStarted mutation
result, err := s.ApplyLocal(r.Context(), checkoutId, &messages.PaymentStarted{
PaymentId: session.Id,
Amount: session.Amount.Value,
Currency: session.Amount.Currency,
Provider: "adyen",
SessionData: &anypb.Any{
TypeUrl: "type.googleapis.com/google.protobuf.StringValue",
Value: sessionBytes,
},
Method: &payload.Method,
StartedAt: timestamppb.New(time.Now()),
})
if err != nil {
logger.Error("unable to apply payment started mutation", "error", err)
return err
}
return s.WriteResult(w, result)
case "klarna":
order, err := s.CreateOrUpdateCheckout(r, grain, nil)
if err != nil {
logger.Error("unable to create klarna session", "error", err)
return err
}
orderBytes, err := json.Marshal(order)
if err != nil {
logger.Error("unable to marshal order", "error", err)
return err
}
result, err := s.ApplyLocal(r.Context(), checkoutId, &messages.PaymentStarted{
PaymentId: order.ID,
Amount: int64(order.OrderAmount),
Currency: order.PurchaseCurrency,
Provider: "klarna",
Method: &payload.Method,
SessionData: &anypb.Any{
TypeUrl: "type.googleapis.com/google.protobuf.StringValue",
Value: orderBytes,
},
StartedAt: timestamppb.New(time.Now()),
})
if err != nil {
logger.Error("unable to apply payment started mutation", "error", err)
return err
}
return s.WriteResult(w, result)
default:
http.Error(w, "unsupported payment provider", http.StatusBadRequest)
return nil
}
}
func (s *CheckoutPoolServer) Serve(mux *http.ServeMux) {
handleFunc := func(pattern string, handlerFunc func(http.ResponseWriter, *http.Request)) {
attr := attribute.String("http.route", pattern)
mux.HandleFunc(pattern, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
span := trace.SpanFromContext(r.Context())
span.SetName(pattern)
span.SetAttributes(attr)
labeler, _ := otelhttp.LabelerFromContext(r.Context())
labeler.Add(attr)
handlerFunc(w, r)
}))
}
//handleFunc("/payment/adyen/session", CookieCheckoutIdHandler(s.AdyenSessionHandler))
handleFunc("/payment/adyen/push", s.AdyenHookHandler)
handleFunc("/payment/adyen/return", s.AdyenReturnHandler)
//handleFunc("/payment/adyen/cancel", s.AdyenCancelHandler)
handleFunc("/payment/klarna/validate", s.KlarnaValidationHandler)
handleFunc("/payment/klarna/push", s.KlarnaPushHandler)
handleFunc("/payment/klarna/notification", s.KlarnaNotificationHandler)
conn, err := amqp.Dial(amqpUrl)
if err != nil {
log.Fatalf("failed to connect to RabbitMQ: %v", err)
}
orderHandler := NewAmqpOrderHandler(conn)
orderHandler.DefineQueue()
handleFunc("POST /api/checkout/start/{cartid}", s.StartCheckoutHandler)
handleFunc("GET /api/checkout", CookieCheckoutIdHandler(s.ProxyHandler(s.GetCheckoutHandler)))
handleFunc("POST /api/checkout/delivery", CookieCheckoutIdHandler(s.ProxyHandler(s.SetDeliveryHandler)))
handleFunc("DELETE /api/checkout/delivery/{id}", CookieCheckoutIdHandler(s.ProxyHandler(s.RemoveDeliveryHandler)))
handleFunc("POST /api/checkout/pickup-point", CookieCheckoutIdHandler(s.ProxyHandler(s.SetPickupPointHandler)))
handleFunc("POST /api/checkout/contact-details", CookieCheckoutIdHandler(s.ProxyHandler(s.ContactDetailsUpdatedHandler)))
handleFunc("POST /payment", CookieCheckoutIdHandler(s.ProxyHandler(s.StartPaymentHandler)))
handleFunc("POST /payment/{id}/session", CookieCheckoutIdHandler(s.ProxyHandler(s.GetPaymentSessionHandler)))
handleFunc("DELETE /payment/{id}", CookieCheckoutIdHandler(s.ProxyHandler(s.CancelPaymentHandler)))
// handleFunc("POST /api/checkout/initialize", CookieCheckoutIdHandler(s.ProxyHandler(s.InitializeCheckoutHandler)))
// handleFunc("POST /api/checkout/inventory-reserved", CookieCheckoutIdHandler(s.ProxyHandler(s.InventoryReservedHandler)))
// handleFunc("POST /api/checkout/order-created", CookieCheckoutIdHandler(s.ProxyHandler(s.OrderCreatedHandler)))
// handleFunc("POST /api/checkout/confirmation-viewed", CookieCheckoutIdHandler(s.ProxyHandler(s.ConfirmationViewedHandler)))
//handleFunc("GET /payment/klarna/session", CookieCheckoutIdHandler(s.ProxyHandler(s.KlarnaSessionHandler)))
//handleFunc("GET /payment/klarna/checkout", CookieCheckoutIdHandler(s.ProxyHandler(s.KlarnaHtmlCheckoutHandler)))
handleFunc("GET /payment/klarna/confirmation/{order_id}", s.KlarnaConfirmationHandler)
}

View File

@@ -1,144 +0,0 @@
package main
import (
"context"
"log"
"net/http"
"strings"
"time"
"git.k6n.net/go-cart-actor/pkg/cart"
"git.k6n.net/go-cart-actor/pkg/checkout"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
)
func getOriginalHost(r *http.Request) string {
proxyHost := r.Header.Get("X-Forwarded-Host")
if proxyHost != "" {
return proxyHost
}
return r.Host
}
func getClientIp(r *http.Request) string {
ip := r.Header.Get("X-Forwarded-For")
if ip == "" {
ip = r.RemoteAddr
}
return ip
}
func getCurrency(country string) string {
if country == "no" {
return "NOK"
}
return "SEK"
}
func getLocale(country string) string {
if country == "no" {
return "nb-no"
}
return "sv-se"
}
func getCountryFromHost(host string) string {
if strings.Contains(strings.ToLower(host), "-no") {
return "no"
}
if strings.Contains(strings.ToLower(host), "-se") {
return "se"
}
return ""
}
func (a *CheckoutPoolServer) reserveInventory(ctx context.Context, grain *checkout.CheckoutGrain) error {
if a.inventoryService != nil {
inventoryRequests := getInventoryRequests(grain.CartState.Items)
_, err := a.inventoryService.ReservationCheck(ctx, inventoryRequests...)
if err != nil {
logger.WarnContext(ctx, "placeorder inventory check failed")
return err
}
}
return nil
}
const checkoutCookieName = "checkoutid"
func setCheckoutCookie(w http.ResponseWriter, checkoutId checkout.CheckoutId, tls bool) {
if checkoutId == 0 {
http.SetCookie(w, &http.Cookie{
Name: checkoutCookieName,
Value: checkoutId.String(),
Secure: tls,
HttpOnly: true,
Path: "/",
Expires: time.Unix(0, 0),
SameSite: http.SameSiteLaxMode,
})
} else {
http.SetCookie(w, &http.Cookie{
Name: checkoutCookieName,
Value: checkoutId.String(),
Secure: tls,
HttpOnly: true,
Path: "/",
Expires: time.Now().AddDate(0, 0, 14),
SameSite: http.SameSiteLaxMode,
})
}
}
func CookieCheckoutIdHandler(fn func(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
var id checkout.CheckoutId
cookie, err := r.Cookie(checkoutCookieName)
if err != nil || cookie.Value == "" {
w.WriteHeader(http.StatusNotAcceptable)
return
} else {
parsed, ok := cart.ParseCartId(cookie.Value)
if !ok {
w.WriteHeader(http.StatusNotAcceptable)
return
} else {
id = parsed
}
}
err = fn(w, r, id)
if err != nil {
log.Printf("Server error, not remote error: %v\n", err)
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
}
}
}
func (s *CheckoutPoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error) func(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
return func(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
if ownerHost, ok := s.OwnerHost(uint64(checkoutId)); ok {
ctx, span := tracer.Start(r.Context(), "proxy")
defer span.End()
span.SetAttributes(attribute.String("checkoutid", checkoutId.String()))
hostAttr := attribute.String("other host", ownerHost.Name())
span.SetAttributes(hostAttr)
logger.InfoContext(ctx, "checkout proxyed", "result", ownerHost.Name())
proxyCalls.Add(ctx, 1, metric.WithAttributes(hostAttr))
handled, err := ownerHost.Proxy(uint64(checkoutId), w, r, nil)
grainLookups.Inc()
if err == nil && handled {
return nil
}
}
_, span := tracer.Start(r.Context(), "own")
span.SetAttributes(attribute.String("checkoutid", checkoutId.String()))
defer span.End()
return fn(w, r, checkoutId)
}
}

View File

@@ -1,158 +0,0 @@
package main
import (
"context"
"encoding/json"
"log"
"net/http"
"os"
"sync"
"github.com/matst80/go-redis-inventory/pkg/inventory"
"github.com/matst80/slask-finder/pkg/index"
"github.com/matst80/slask-finder/pkg/messaging"
"github.com/redis/go-redis/v9"
"github.com/redis/go-redis/v9/maintnotifications"
amqp "github.com/rabbitmq/amqp091-go"
)
type Server struct {
inventoryService *inventory.RedisInventoryService
reservationService *inventory.RedisCartReservationService
}
func (srv *Server) livezHandler(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("OK"))
}
func (srv *Server) readyzHandler(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Write([]byte("OK"))
}
func (srv *Server) getInventoryHandler(w http.ResponseWriter, r *http.Request) {
sku := inventory.SKU(r.PathValue("sku"))
locationID := inventory.LocationID(r.PathValue("locationId"))
quantity, err := srv.inventoryService.GetInventory(r.Context(), sku, locationID)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
response := map[string]int64{"quantity": quantity}
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(response)
}
func (srv *Server) getReservationHandler(w http.ResponseWriter, r *http.Request) {
sku := inventory.SKU(r.PathValue("sku"))
locationID := inventory.LocationID(r.PathValue("locationId"))
summary, err := srv.reservationService.GetReservationSummary(r.Context(), sku, locationID)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(summary)
}
var country = "se"
var redisAddress = "10.10.3.18:6379"
var redisPassword = "slaskredis"
func init() {
// Override redis config from environment variables if set
if addr, ok := os.LookupEnv("REDIS_ADDRESS"); ok {
redisAddress = addr
}
if password, ok := os.LookupEnv("REDIS_PASSWORD"); ok {
redisPassword = password
}
if ctry, ok := os.LookupEnv("COUNTRY"); ok {
country = ctry
}
}
func main() {
var ctx = context.Background()
rdb := redis.NewClient(&redis.Options{
Addr: redisAddress,
Password: redisPassword, // no password set
DB: 0, // use default DB
MaintNotificationsConfig: &maintnotifications.Config{
Mode: maintnotifications.ModeDisabled,
},
})
s, err := inventory.NewRedisInventoryService(rdb)
if err != nil {
log.Fatalf("Unable to connect to inventory redis: %v", err)
return
}
r, err := inventory.NewRedisCartReservationService(rdb)
if err != nil {
log.Fatalf("Unable to connect to reservation redis: %v", err)
return
}
server := &Server{inventoryService: s, reservationService: r}
// Set up HTTP routes
http.HandleFunc("/livez", server.livezHandler)
http.HandleFunc("/readyz", server.readyzHandler)
http.HandleFunc("/inventory/{sku}/{locationId}", server.getInventoryHandler)
http.HandleFunc("/reservations/{sku}/{locationId}", server.getReservationHandler)
stockhandler := &StockHandler{
MainStockLocationID: inventory.LocationID(country),
rdb: rdb,
ctx: ctx,
svc: *s,
}
amqpUrl, ok := os.LookupEnv("RABBIT_HOST")
if ok {
log.Printf("Connecting to rabbitmq")
conn, err := amqp.DialConfig(amqpUrl, amqp.Config{
Properties: amqp.NewConnectionProperties(),
})
//a.conn = conn
if err != nil {
log.Fatalf("Failed to connect to RabbitMQ: %v", err)
}
ch, err := conn.Channel()
if err != nil {
log.Fatalf("Failed to open a channel: %v", err)
}
// items listener
err = messaging.ListenToTopic(ch, country, "item_added", func(d amqp.Delivery) error {
var items []*index.DataItem
err := json.Unmarshal(d.Body, &items)
if err == nil {
log.Printf("Got upserts %d, message count %d", len(items), d.MessageCount)
wg := &sync.WaitGroup{}
for _, item := range items {
stockhandler.HandleItem(item, wg)
}
wg.Wait()
log.Print("Batch done...")
} else {
log.Printf("Failed to unmarshal upsert message %v", err)
}
return err
})
if err != nil {
log.Fatalf("Failed to listen to item_added topic: %v", err)
}
}
// Start HTTP server
log.Println("Starting HTTP server on :8080")
log.Fatal(http.ListenAndServe(":8080", nil))
}

View File

@@ -1,49 +0,0 @@
package main
import (
"context"
"log"
"strconv"
"strings"
"sync"
"github.com/matst80/go-redis-inventory/pkg/inventory"
"github.com/matst80/slask-finder/pkg/types"
"github.com/redis/go-redis/v9"
)
type StockHandler struct {
rdb *redis.Client
ctx context.Context
svc inventory.RedisInventoryService
MainStockLocationID inventory.LocationID
}
func (s *StockHandler) HandleItem(item types.Item, wg *sync.WaitGroup) {
wg.Go(func() {
ctx := s.ctx
pipe := s.rdb.Pipeline()
centralStockString, ok := item.GetStringFieldValue(3)
if !ok {
centralStockString = "0"
}
centralStockString = strings.Replace(centralStockString, "+", "", -1)
centralStockString = strings.Replace(centralStockString, "<", "", -1)
centralStockString = strings.Replace(centralStockString, ">", "", -1)
centralStock, err := strconv.ParseInt(centralStockString, 10, 64)
if err != nil {
log.Printf("unable to parse central stock for item %s: %v", item.GetSku(), err)
centralStock = 0
} else {
s.svc.UpdateInventory(ctx, pipe, inventory.SKU(item.GetSku()), s.MainStockLocationID, int64(centralStock))
}
for id, value := range item.GetStock() {
s.svc.UpdateInventory(ctx, pipe, inventory.SKU(item.GetSku()), inventory.LocationID(id), int64(value))
}
_, err = pipe.Exec(ctx)
if err != nil {
log.Printf("unable to update stock: %v", err)
}
})
}

View File

@@ -1,5 +0,0 @@
# Netscape HTTP Cookie File
# https://curl.se/docs/http-cookies.html
# This file was generated by libcurl! Edit at your own risk.
#HttpOnly_localhost FALSE / FALSE 1761304670 cartid 4393545184291837

BIN
data/1.prot Normal file

Binary file not shown.

BIN
data/4.prot Normal file

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BIN
data/state.gob Normal file

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BIN
data/state.gob.bak Normal file

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View File

@@ -1,661 +0,0 @@
apiVersion: v1
kind: Secret
metadata:
name: klarna-api-credentials
data:
username: ZjQzZDY3YjEtNzA2Yy00NTk2LTliNTgtYjg1YjU2NDEwZTUw
password: a2xhcm5hX3Rlc3RfYXBpX0trUWhWVE5yYVZsV2FsTnhTRVp3Y1ZSSFF5UkVNRmxyY25Kd1AxSndQMGdzWmpRelpEWTNZakV0TnpBMll5MDBOVGsyTFRsaU5UZ3RZamcxWWpVMk5ERXdaVFV3TERFc2JUUkNjRFpWU1RsTllsSk1aMlEyVEc4MmRVODNZMkozUlRaaFdEZDViV3AwYkhGV1JqTjVNQzlaYXow
type: Opaque
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: cart-backoffice
arch: amd64
name: cart-backoffice-x86
spec:
replicas: 1
selector:
matchLabels:
app: cart-backoffice
arch: amd64
template:
metadata:
labels:
app: cart-backoffice
arch: amd64
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/arch
operator: NotIn
values:
- arm64
volumes:
- name: data
nfs:
path: /i-data/7a8af061/nfs/
server: 10.10.1.10
serviceAccountName: default
containers:
- image: registry.k6n.net/go-cart-actor-amd64:latest
name: cart-actor-amd64
imagePullPolicy: Always
command: ["/go-cart-backoffice"]
lifecycle:
preStop:
exec:
command: ["sleep", "15"]
ports:
- containerPort: 8080
name: web
livenessProbe:
httpGet:
path: /livez
port: web
failureThreshold: 1
periodSeconds: 30
readinessProbe:
httpGet:
path: /readyz
port: web
failureThreshold: 2
initialDelaySeconds: 2
periodSeconds: 30
volumeMounts:
- mountPath: "/data"
name: data
resources:
limits:
memory: "768Mi"
requests:
memory: "70Mi"
cpu: "1200m"
env:
- name: DATA_DIR
value: "/data/cart-actor"
- name: CHECKOUT_DATA_DIR
value: "/data/checkout-actor"
- name: TZ
value: "Europe/Stockholm"
- name: REDIS_ADDRESS
value: "10.10.3.18:6379"
- name: REDIS_PASSWORD
value: "slaskredis"
- name: ADYEN_HMAC
valueFrom:
secretKeyRef:
name: adyen
key: HMAC
- name: ADYEN_API_KEY
valueFrom:
secretKeyRef:
name: adyen
key: API_KEY
- name: KLARNA_API_USERNAME
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: username
- name: KLARNA_API_PASSWORD
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: password
- name: AMQP_URL
value: "amqp://admin:12bananer@rabbitmq.dev:5672/"
# - name: BASE_URL
# value: "https://s10n-no.tornberg.me"
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: cart-actor
arch: amd64
name: cart-actor-x86
spec:
replicas: 3
selector:
matchLabels:
app: cart-actor
arch: amd64
template:
metadata:
labels:
app: cart-actor
actor-pool: cart
arch: amd64
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/arch
operator: NotIn
values:
- arm64
volumes:
- name: data
nfs:
path: /i-data/7a8af061/nfs/cart-actor
server: 10.10.1.10
serviceAccountName: default
containers:
- image: registry.k6n.net/go-cart-actor-amd64:latest
name: cart-actor-amd64
imagePullPolicy: Always
lifecycle:
preStop:
exec:
command: ["sleep", "15"]
ports:
- containerPort: 8080
name: web
- containerPort: 8081
name: debug
- containerPort: 1337
name: rpc
livenessProbe:
httpGet:
path: /livez
port: web
failureThreshold: 1
periodSeconds: 30
readinessProbe:
httpGet:
path: /readyz
port: web
failureThreshold: 2
initialDelaySeconds: 2
periodSeconds: 50
volumeMounts:
- mountPath: "/data"
name: data
resources:
limits:
memory: "768Mi"
requests:
memory: "70Mi"
cpu: "1200m"
env:
- name: DATA_DIR
value: "/data/cart-actor"
- name: CHECKOUT_DATA_DIR
value: "/data/checkout-actor"
- name: TZ
value: "Europe/Stockholm"
- name: KLARNA_API_USERNAME
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: username
- name: REDIS_ADDRESS
value: "10.10.3.18:6379"
- name: REDIS_PASSWORD
value: "slaskredis"
- name: OTEL_RESOURCE_ATTRIBUTES
value: "service.name=cart,service.version=0.1.2"
- name: OTEL_EXPORTER_OTLP_ENDPOINT
value: "http://otel-debug-service.monitoring:4317"
- name: ADYEN_HMAC
valueFrom:
secretKeyRef:
name: adyen
key: HMAC
- name: ADYEN_API_KEY
valueFrom:
secretKeyRef:
name: adyen
key: API_KEY
- name: KLARNA_API_PASSWORD
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: password
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: AMQP_URL
value: "amqp://admin:12bananer@rabbitmq.dev:5672/"
# - name: BASE_URL
# value: "https://s10n-no.tornberg.me"
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: cart-actor
arch: arm64
name: cart-actor-arm64
spec:
replicas: 0
selector:
matchLabels:
app: cart-actor
arch: arm64
template:
metadata:
labels:
app: cart-actor
actor-pool: cart
arch: arm64
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: NotIn
values:
- masterpi
- key: kubernetes.io/arch
operator: In
values:
- arm64
volumes:
- name: data
nfs:
path: /i-data/7a8af061/nfs/cart-actor
server: 10.10.1.10
serviceAccountName: default
containers:
- image: registry.k6n.net/go-cart-actor:latest
name: cart-actor-arm64
imagePullPolicy: Always
lifecycle:
preStop:
exec:
command: ["sleep", "15"]
ports:
- containerPort: 8080
name: web
- containerPort: 8081
name: debug
- containerPort: 1337
name: rpc
livenessProbe:
httpGet:
path: /livez
port: web
failureThreshold: 1
periodSeconds: 15
readinessProbe:
httpGet:
path: /readyz
port: web
failureThreshold: 2
initialDelaySeconds: 2
periodSeconds: 15
volumeMounts:
- mountPath: "/data"
name: data
resources:
limits:
memory: "768Mi"
requests:
memory: "70Mi"
cpu: "1200m"
env:
- name: TZ
value: "Europe/Stockholm"
- name: REDIS_ADDRESS
value: "redis.home:6379"
- name: REDIS_PASSWORD
value: "slaskredis"
- name: OTEL_RESOURCE_ATTRIBUTES
value: "service.name=cart,service.version=0.1.2"
- name: OTEL_EXPORTER_OTLP_ENDPOINT
value: "http://otel-debug-service.monitoring:4317"
- name: ADYEN_HMAC
valueFrom:
secretKeyRef:
name: adyen
key: HMAC
- name: ADYEN_API_KEY
valueFrom:
secretKeyRef:
name: adyen
key: API_KEY
- name: KLARNA_API_USERNAME
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: username
- name: KLARNA_API_PASSWORD
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: password
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: AMQP_URL
value: "amqp://admin:12bananer@rabbitmq.dev:5672/"
# - name: BASE_URL
# value: "https://s10n-no.tornberg.me"
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
---
kind: Service
apiVersion: v1
metadata:
name: cart-actor
annotations:
prometheus.io/port: "8081"
prometheus.io/scrape: "true"
prometheus.io/path: "/metrics"
spec:
selector:
app: cart-actor
ports:
- name: web
port: 8080
- name: internal
port: 8081
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: checkout-actor
arch: amd64
name: checkout-actor-x86
spec:
replicas: 3
selector:
matchLabels:
app: checkout-actor
arch: amd64
template:
metadata:
labels:
app: checkout-actor
actor-pool: checkout
arch: amd64
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/arch
operator: NotIn
values:
- arm64
volumes:
- name: data
nfs:
path: /i-data/7a8af061/nfs/checkout-actor
server: 10.10.1.10
serviceAccountName: default
containers:
- image: registry.k6n.net/go-cart-actor-amd64:latest
name: checkout-actor-amd64
imagePullPolicy: Always
command: ["/go-checkout-actor"]
lifecycle:
preStop:
exec:
command: ["sleep", "15"]
ports:
- containerPort: 8080
name: web
- containerPort: 8081
name: debug
- containerPort: 1337
name: rpc
livenessProbe:
httpGet:
path: /livez
port: web
failureThreshold: 1
periodSeconds: 15
readinessProbe:
httpGet:
path: /readyz
port: web
failureThreshold: 2
initialDelaySeconds: 1
periodSeconds: 15
volumeMounts:
- mountPath: "/data"
name: data
resources:
limits:
memory: "768Mi"
requests:
memory: "70Mi"
cpu: "1200m"
env:
- name: TZ
value: "Europe/Stockholm"
- name: REDIS_ADDRESS
value: "10.10.3.18:6379"
- name: REDIS_PASSWORD
value: "slaskredis"
- name: OTEL_RESOURCE_ATTRIBUTES
value: "service.name=checkout,service.version=0.1.2"
- name: OTEL_EXPORTER_OTLP_ENDPOINT
value: "http://otel-debug-service.monitoring:4317"
- name: ADYEN_HMAC
valueFrom:
secretKeyRef:
name: adyen
key: HMAC
- name: ADYEN_API_KEY
valueFrom:
secretKeyRef:
name: adyen
key: API_KEY
- name: KLARNA_API_USERNAME
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: username
- name: KLARNA_API_PASSWORD
valueFrom:
secretKeyRef:
name: klarna-api-credentials
key: password
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: AMQP_URL
value: "amqp://admin:12bananer@rabbitmq.dev:5672/"
- name: CART_INTERNAL_URL
value: "http://cart-actor:8080"
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
---
kind: Service
apiVersion: v1
metadata:
name: checkout-actor
annotations:
prometheus.io/port: "8081"
prometheus.io/scrape: "true"
prometheus.io/path: "/metrics"
spec:
selector:
app: checkout-actor
ports:
- name: web
port: 8080
---
kind: Service
apiVersion: v1
metadata:
name: cart-backoffice
spec:
selector:
app: cart-backoffice
ports:
- name: web
port: 8080
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: cart-ingress
annotations:
cert-manager.io/cluster-issuer: letsencrypt-prod
nginx.ingress.kubernetes.io/affinity: "cookie"
nginx.ingress.kubernetes.io/session-cookie-name: "cart-affinity"
nginx.ingress.kubernetes.io/session-cookie-expires: "172800"
nginx.ingress.kubernetes.io/session-cookie-max-age: "172800"
nginx.ingress.kubernetes.io/proxy-body-size: 4m
spec:
ingressClassName: nginx
tls:
- hosts:
- cart.k6n.net
secretName: cart-actor-tls-secret
rules:
- host: cart.k6n.net
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: cart-actor
port:
number: 8080
- path: /api/checkout
pathType: Prefix
backend:
service:
name: checkout-actor
port:
number: 8080
- path: /payment
pathType: Prefix
backend:
service:
name: checkout-actor
port:
number: 8080
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: cart-backend-ingress
annotations:
cert-manager.io/cluster-issuer: letsencrypt-prod
spec:
ingressClassName: nginx
tls:
- hosts:
- slask-cart.k6n.net
secretName: cart-backoffice-actor-tls-secret
rules:
- host: slask-cart.k6n.net
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: cart-backoffice
port:
number: 8080
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: cart-inventory
arch: amd64
name: cart-inventory-x86
spec:
replicas: 1
selector:
matchLabels:
app: cart-inventory
arch: amd64
template:
metadata:
labels:
app: cart-inventory
arch: amd64
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/arch
operator: NotIn
values:
- arm64
serviceAccountName: default
containers:
- image: registry.k6n.net/go-cart-actor-amd64:latest
name: cart-inventory-amd64
imagePullPolicy: Always
command: ["/go-cart-inventory"]
lifecycle:
preStop:
exec:
command: ["sleep", "15"]
ports:
- containerPort: 8080
name: web
livenessProbe:
httpGet:
path: /livez
port: web
failureThreshold: 1
periodSeconds: 30
readinessProbe:
httpGet:
path: /readyz
port: web
failureThreshold: 2
initialDelaySeconds: 2
periodSeconds: 30
resources:
limits:
memory: "256Mi"
cpu: "500m"
requests:
memory: "50Mi"
cpu: "500m"
env:
- name: TZ
value: "Europe/Stockholm"
- name: RABBIT_HOST
value: amqp://admin:12bananer@rabbitmq.s10n:5672/
- name: REDIS_ADDRESS
value: "redis.home:6379"
- name: REDIS_PASSWORD
value: "slaskredis"
---
kind: Service
apiVersion: v1
metadata:
name: inventory
spec:
selector:
app: cart-inventory
ports:
- name: web
port: 8080

View File

@@ -1,22 +0,0 @@
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: cart-discovery
rules:
- apiGroups: [""] # "" indicates the core API group
resources: ["pods","services", "deployments"]
verbs: ["get", "watch", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: cart-discovery-binding
subjects:
- kind: ServiceAccount
name: default
namespace: cart
apiGroup: ""
roleRef:
kind: ClusterRole
name: cart-discovery
apiGroup: ""

View File

@@ -1,101 +0,0 @@
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
name: cart-scaler-amd
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: cart-actor-x86
minReplicas: 3
maxReplicas: 9
behavior:
scaleUp:
stabilizationWindowSeconds: 60
policies:
- type: Percent
value: 100
periodSeconds: 60
scaleDown:
stabilizationWindowSeconds: 180
policies:
- type: Percent
value: 50
periodSeconds: 60
metrics:
- type: Resource
resource:
name: cpu
target:
type: Utilization
averageUtilization: 50
# Future custom metric (example):
# - type: Pods
# pods:
# metric:
# name: cart_mutations_per_second
# target:
# type: AverageValue
# averageValue: "15"
# - type: Object
# object:
# describedObject:
# apiVersion: networking.k8s.io/v1
# kind: Ingress
# name: cart-ingress
# metric:
# name: http_requests_per_second
# target:
# type: Value
# value: "100"
---
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
name: cart-scaler-arm
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: cart-actor-arm64
minReplicas: 3
maxReplicas: 9
behavior:
scaleUp:
stabilizationWindowSeconds: 60
policies:
- type: Percent
value: 100
periodSeconds: 60
scaleDown:
stabilizationWindowSeconds: 180
policies:
- type: Percent
value: 50
periodSeconds: 60
metrics:
- type: Resource
resource:
name: cpu
target:
type: Utilization
averageUtilization: 50
# Future custom metric (example):
# - type: Pods
# pods:
# metric:
# name: cart_mutations_per_second
# target:
# type: AverageValue
# averageValue: "15"
# - type: Object
# object:
# describedObject:
# apiVersion: networking.k8s.io/v1
# kind: Ingress
# name: cart-ingress
# metric:
# name: http_requests_per_second
# target:
# type: Value
# value: "100"

118
disk-storage.go Normal file
View File

@@ -0,0 +1,118 @@
package main
import (
"encoding/gob"
"errors"
"fmt"
"log"
"os"
"time"
)
type DiskStorage struct {
stateFile string
lastSave int64
LastSaves map[CartId]int64
}
func NewDiskStorage(stateFile string) (*DiskStorage, error) {
ret := &DiskStorage{
stateFile: stateFile,
LastSaves: make(map[CartId]int64),
}
err := ret.loadState()
return ret, err
}
func saveMessages(messages []StorableMessage, id CartId) error {
log.Printf("%d messages to save for %s", len(messages), id)
if len(messages) == 0 {
return nil
}
var file *os.File
var err error
path := getCartPath(id.String())
file, err = os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer file.Close()
for _, m := range messages {
err := m.Write(file)
if err != nil {
return err
}
}
return err
}
func getCartPath(id string) string {
return fmt.Sprintf("data/%s.prot", id)
}
func loadMessages(grain Grain, id CartId) error {
var err error
path := getCartPath(id.String())
if _, err = os.Stat(path); errors.Is(err, os.ErrNotExist) {
return err
}
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
for err == nil {
var msg Message
err = MessageFromReader(file, &msg)
if err == nil {
grain.HandleMessage(&msg, true)
}
}
if err.Error() == "EOF" {
return nil
}
return err
}
func (s *DiskStorage) saveState() error {
tmpFile := s.stateFile + "_tmp"
file, err := os.Create(tmpFile)
if err != nil {
return err
}
defer file.Close()
err = gob.NewEncoder(file).Encode(s.LastSaves)
if err != nil {
return err
}
os.Remove(s.stateFile + ".bak")
os.Rename(s.stateFile, s.stateFile+".bak")
return os.Rename(tmpFile, s.stateFile)
}
func (s *DiskStorage) loadState() error {
file, err := os.Open(s.stateFile)
if err != nil {
return err
}
defer file.Close()
return gob.NewDecoder(file).Decode(&s.LastSaves)
}
func (s *DiskStorage) Store(id CartId, grain *CartGrain) error {
lastSavedMessage, ok := s.LastSaves[id]
if ok && lastSavedMessage > grain.GetLastChange() {
return nil
}
err := saveMessages(grain.GetStorageMessage(lastSavedMessage), id)
if err != nil {
return err
}
ts := time.Now().Unix()
s.LastSaves[id] = ts
s.lastSave = ts
return nil
}

126
go.mod
View File

@@ -1,118 +1,26 @@
module git.k6n.net/go-cart-actor
module git.tornberg.me/go-cart-actor
go 1.25.4
go 1.23.0
toolchain go1.23.2
require (
github.com/adyen/adyen-go-api-library/v21 v21.1.0
github.com/google/uuid v1.6.0
github.com/matst80/go-redis-inventory v0.0.0-20251126173508-51b30de2d86e
github.com/matst80/slask-finder v0.0.0-20251125182907-9e57f193127a
github.com/prometheus/client_golang v1.23.2
github.com/rabbitmq/amqp091-go v1.10.0
github.com/redis/go-redis/v9 v9.17.0
go.opentelemetry.io/contrib/bridges/otelslog v0.13.0
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0
go.opentelemetry.io/otel v1.38.0
go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.14.0
go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0
go.opentelemetry.io/otel/log v0.14.0
go.opentelemetry.io/otel/metric v1.38.0
go.opentelemetry.io/otel/sdk v1.38.0
go.opentelemetry.io/otel/sdk/log v0.14.0
go.opentelemetry.io/otel/sdk/metric v1.38.0
go.opentelemetry.io/otel/trace v1.38.0
google.golang.org/grpc v1.77.0
google.golang.org/protobuf v1.36.10
k8s.io/api v0.34.2
k8s.io/apimachinery v0.34.2
k8s.io/client-go v0.34.2
)
require (
github.com/RoaringBitmap/roaring/v2 v2.14.4 // indirect
cloud.google.com/go/compute/metadata v0.3.0 // indirect
github.com/beorn7/perks v1.0.1 // indirect
github.com/bits-and-blooms/bitset v1.24.4 // indirect
github.com/cenkalti/backoff/v5 v5.0.3 // indirect
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
github.com/dprotaso/go-yit v0.0.0-20251117151522-da16f3077589 // indirect
github.com/emicklei/go-restful/v3 v3.13.0 // indirect
github.com/felixge/httpsnoop v1.0.4 // indirect
github.com/fxamacker/cbor/v2 v2.9.0 // indirect
github.com/getkin/kin-openapi v0.133.0 // indirect
github.com/go-logr/logr v1.4.3 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/go-openapi/jsonpointer v0.22.3 // indirect
github.com/go-openapi/jsonreference v0.21.3 // indirect
github.com/go-openapi/swag v0.25.4 // indirect
github.com/go-openapi/swag/cmdutils v0.25.4 // indirect
github.com/go-openapi/swag/conv v0.25.4 // indirect
github.com/go-openapi/swag/fileutils v0.25.4 // indirect
github.com/go-openapi/swag/jsonname v0.25.4 // indirect
github.com/go-openapi/swag/jsonutils v0.25.4 // indirect
github.com/go-openapi/swag/loading v0.25.4 // indirect
github.com/go-openapi/swag/mangling v0.25.4 // indirect
github.com/go-openapi/swag/netutils v0.25.4 // indirect
github.com/go-openapi/swag/stringutils v0.25.4 // indirect
github.com/go-openapi/swag/typeutils v0.25.4 // indirect
github.com/go-openapi/swag/yamlutils v0.25.4 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/google/gnostic-models v0.7.1 // indirect
github.com/google/go-cmp v0.7.0 // indirect
github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
github.com/gorilla/schema v1.4.1 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/json-iterator/go v1.1.12 // indirect
github.com/mailru/easyjson v0.9.1 // indirect
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
github.com/mschoch/smat v0.2.0 // indirect
github.com/klauspost/compress v1.17.9 // indirect
github.com/matst80/slask-finder v0.0.0-20241104074525-3365cb1531ac // indirect
github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
github.com/oapi-codegen/oapi-codegen/v2 v2.5.1 // indirect
github.com/oasdiff/yaml v0.0.0-20250309154309-f31be36b4037 // indirect
github.com/oasdiff/yaml3 v0.0.0-20250309153720-d2182401db90 // indirect
github.com/perimeterx/marshmallow v1.1.5 // indirect
github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
github.com/prometheus/client_model v0.6.2 // indirect
github.com/prometheus/common v0.67.4 // indirect
github.com/prometheus/procfs v0.19.2 // indirect
github.com/speakeasy-api/jsonpath v0.6.2 // indirect
github.com/speakeasy-api/openapi-overlay v0.10.3 // indirect
github.com/spf13/pflag v1.0.10 // indirect
github.com/vmware-labs/yaml-jsonpath v0.3.2 // indirect
github.com/woodsbury/decimal128 v1.4.0 // indirect
github.com/x448/float16 v0.8.4 // indirect
go.opentelemetry.io/auto/sdk v1.2.1 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0 // indirect
go.opentelemetry.io/proto/otlp v1.9.0 // indirect
go.yaml.in/yaml/v2 v2.4.3 // indirect
go.yaml.in/yaml/v3 v3.0.4 // indirect
go.yaml.in/yaml/v4 v4.0.0-rc.3 // indirect
golang.org/x/mod v0.30.0 // indirect
golang.org/x/net v0.47.0 // indirect
golang.org/x/oauth2 v0.33.0 // indirect
golang.org/x/sync v0.18.0 // indirect
golang.org/x/sys v0.38.0 // indirect
golang.org/x/term v0.37.0 // indirect
golang.org/x/text v0.31.0 // indirect
golang.org/x/time v0.14.0 // indirect
golang.org/x/tools v0.39.0 // indirect
google.golang.org/genproto/googleapis/api v0.0.0-20251124214823-79d6a2a48846 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20251124214823-79d6a2a48846 // indirect
gopkg.in/evanphx/json-patch.v4 v4.13.0 // indirect
gopkg.in/inf.v0 v0.9.1 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
k8s.io/klog/v2 v2.130.1 // indirect
k8s.io/kube-openapi v0.0.0-20251125145642-4e65d59e963e // indirect
k8s.io/utils v0.0.0-20251002143259-bc988d571ff4 // indirect
sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
sigs.k8s.io/randfill v1.0.0 // indirect
sigs.k8s.io/structured-merge-diff/v6 v6.3.1 // indirect
sigs.k8s.io/yaml v1.6.0 // indirect
github.com/prometheus/client_golang v1.20.4 // indirect
github.com/prometheus/client_model v0.6.1 // indirect
github.com/prometheus/common v0.55.0 // indirect
github.com/prometheus/procfs v0.15.1 // indirect
github.com/rabbitmq/amqp091-go v1.10.0 // indirect
github.com/redis/go-redis/v9 v9.5.3 // indirect
golang.org/x/oauth2 v0.23.0 // indirect
golang.org/x/sys v0.22.0 // indirect
google.golang.org/protobuf v1.34.2 // indirect
)
tool github.com/oapi-codegen/oapi-codegen/v2/cmd/oapi-codegen

349
go.sum
View File

@@ -1,337 +1,36 @@
github.com/RoaringBitmap/roaring/v2 v2.14.4 h1:4aKySrrg9G/5oRtJ3TrZLObVqxgQ9f1znCRBwEwjuVw=
github.com/RoaringBitmap/roaring/v2 v2.14.4/go.mod h1:oMvV6omPWr+2ifRdeZvVJyaz+aoEUopyv5iH0u/+wbY=
github.com/adyen/adyen-go-api-library/v21 v21.1.0 h1:QIKtn99yoBdt2R4PhuMdmY/DTm6Ex5HYd0cB7Sh3y6Y=
github.com/adyen/adyen-go-api-library/v21 v21.1.0/go.mod h1:qsAGYetm761eDAz+f2OQoY4qC+tKNhZOHil1b4FO5zE=
github.com/alicebob/miniredis/v2 v2.35.0 h1:QwLphYqCEAo1eu1TqPRN2jgVMPBweeQcR21jeqDCONI=
github.com/alicebob/miniredis/v2 v2.35.0/go.mod h1:TcL7YfarKPGDAthEtl5NBeHZfeUQj6OXMm/+iu5cLMM=
cloud.google.com/go/compute/metadata v0.3.0 h1:Tz+eQXMEqDIKRsmY3cHTL6FVaynIjX2QxYC4trgAKZc=
cloud.google.com/go/compute/metadata v0.3.0/go.mod h1:zFmK7XCadkQkj6TtorcaGlCW1hT1fIilQDwofLpJ20k=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bits-and-blooms/bitset v1.24.4 h1:95H15Og1clikBrKr/DuzMXkQzECs1M6hhoGXLwLQOZE=
github.com/bits-and-blooms/bitset v1.24.4/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
github.com/dprotaso/go-yit v0.0.0-20191028211022-135eb7262960/go.mod h1:9HQzr9D/0PGwMEbC3d5AB7oi67+h4TsQqItC1GVYG58=
github.com/dprotaso/go-yit v0.0.0-20251117151522-da16f3077589 h1:VJ/jVUWr+r4MQA7U/cscbbXRuwh1PfPCUUItYAjlKN4=
github.com/dprotaso/go-yit v0.0.0-20251117151522-da16f3077589/go.mod h1:IeI20psFPeg2n1jxwbkYCmkpYsXsJqB7qmoqCIlX80s=
github.com/emicklei/go-restful/v3 v3.13.0 h1:C4Bl2xDndpU6nJ4bc1jXd+uTmYPVUwkD6bFY/oTyCes=
github.com/emicklei/go-restful/v3 v3.13.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=
github.com/fxamacker/cbor/v2 v2.9.0/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
github.com/getkin/kin-openapi v0.133.0 h1:pJdmNohVIJ97r4AUFtEXRXwESr8b0bD721u/Tz6k8PQ=
github.com/getkin/kin-openapi v0.133.0/go.mod h1:boAciF6cXk5FhPqe/NQeBTeenbjqU4LhWBf09ILVvWE=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/go-openapi/jsonpointer v0.22.3 h1:dKMwfV4fmt6Ah90zloTbUKWMD+0he+12XYAsPotrkn8=
github.com/go-openapi/jsonpointer v0.22.3/go.mod h1:0lBbqeRsQ5lIanv3LHZBrmRGHLHcQoOXQnf88fHlGWo=
github.com/go-openapi/jsonreference v0.21.3 h1:96Dn+MRPa0nYAR8DR1E03SblB5FJvh7W6krPI0Z7qMc=
github.com/go-openapi/jsonreference v0.21.3/go.mod h1:RqkUP0MrLf37HqxZxrIAtTWW4ZJIK1VzduhXYBEeGc4=
github.com/go-openapi/swag v0.25.4 h1:OyUPUFYDPDBMkqyxOTkqDYFnrhuhi9NR6QVUvIochMU=
github.com/go-openapi/swag v0.25.4/go.mod h1:zNfJ9WZABGHCFg2RnY0S4IOkAcVTzJ6z2Bi+Q4i6qFQ=
github.com/go-openapi/swag/cmdutils v0.25.4 h1:8rYhB5n6WawR192/BfUu2iVlxqVR9aRgGJP6WaBoW+4=
github.com/go-openapi/swag/cmdutils v0.25.4/go.mod h1:pdae/AFo6WxLl5L0rq87eRzVPm/XRHM3MoYgRMvG4A0=
github.com/go-openapi/swag/conv v0.25.4 h1:/Dd7p0LZXczgUcC/Ikm1+YqVzkEeCc9LnOWjfkpkfe4=
github.com/go-openapi/swag/conv v0.25.4/go.mod h1:3LXfie/lwoAv0NHoEuY1hjoFAYkvlqI/Bn5EQDD3PPU=
github.com/go-openapi/swag/fileutils v0.25.4 h1:2oI0XNW5y6UWZTC7vAxC8hmsK/tOkWXHJQH4lKjqw+Y=
github.com/go-openapi/swag/fileutils v0.25.4/go.mod h1:cdOT/PKbwcysVQ9Tpr0q20lQKH7MGhOEb6EwmHOirUk=
github.com/go-openapi/swag/jsonname v0.25.4 h1:bZH0+MsS03MbnwBXYhuTttMOqk+5KcQ9869Vye1bNHI=
github.com/go-openapi/swag/jsonname v0.25.4/go.mod h1:GPVEk9CWVhNvWhZgrnvRA6utbAltopbKwDu8mXNUMag=
github.com/go-openapi/swag/jsonutils v0.25.4 h1:VSchfbGhD4UTf4vCdR2F4TLBdLwHyUDTd1/q4i+jGZA=
github.com/go-openapi/swag/jsonutils v0.25.4/go.mod h1:7OYGXpvVFPn4PpaSdPHJBtF0iGnbEaTk8AvBkoWnaAY=
github.com/go-openapi/swag/jsonutils/fixtures_test v0.25.4 h1:IACsSvBhiNJwlDix7wq39SS2Fh7lUOCJRmx/4SN4sVo=
github.com/go-openapi/swag/jsonutils/fixtures_test v0.25.4/go.mod h1:Mt0Ost9l3cUzVv4OEZG+WSeoHwjWLnarzMePNDAOBiM=
github.com/go-openapi/swag/loading v0.25.4 h1:jN4MvLj0X6yhCDduRsxDDw1aHe+ZWoLjW+9ZQWIKn2s=
github.com/go-openapi/swag/loading v0.25.4/go.mod h1:rpUM1ZiyEP9+mNLIQUdMiD7dCETXvkkC30z53i+ftTE=
github.com/go-openapi/swag/mangling v0.25.4 h1:2b9kBJk9JvPgxr36V23FxJLdwBrpijI26Bx5JH4Hp48=
github.com/go-openapi/swag/mangling v0.25.4/go.mod h1:6dxwu6QyORHpIIApsdZgb6wBk/DPU15MdyYj/ikn0Hg=
github.com/go-openapi/swag/netutils v0.25.4 h1:Gqe6K71bGRb3ZQLusdI8p/y1KLgV4M/k+/HzVSqT8H0=
github.com/go-openapi/swag/netutils v0.25.4/go.mod h1:m2W8dtdaoX7oj9rEttLyTeEFFEBvnAx9qHd5nJEBzYg=
github.com/go-openapi/swag/stringutils v0.25.4 h1:O6dU1Rd8bej4HPA3/CLPciNBBDwZj9HiEpdVsb8B5A8=
github.com/go-openapi/swag/stringutils v0.25.4/go.mod h1:GTsRvhJW5xM5gkgiFe0fV3PUlFm0dr8vki6/VSRaZK0=
github.com/go-openapi/swag/typeutils v0.25.4 h1:1/fbZOUN472NTc39zpa+YGHn3jzHWhv42wAJSN91wRw=
github.com/go-openapi/swag/typeutils v0.25.4/go.mod h1:Ou7g//Wx8tTLS9vG0UmzfCsjZjKhpjxayRKTHXf2pTE=
github.com/go-openapi/swag/yamlutils v0.25.4 h1:6jdaeSItEUb7ioS9lFoCZ65Cne1/RZtPBZ9A56h92Sw=
github.com/go-openapi/swag/yamlutils v0.25.4/go.mod h1:MNzq1ulQu+yd8Kl7wPOut/YHAAU/H6hL91fF+E2RFwc=
github.com/go-openapi/testify/enable/yaml/v2 v2.0.2 h1:0+Y41Pz1NkbTHz8NngxTuAXxEodtNSI1WG1c/m5Akw4=
github.com/go-openapi/testify/enable/yaml/v2 v2.0.2/go.mod h1:kme83333GCtJQHXQ8UKX3IBZu6z8T5Dvy5+CW3NLUUg=
github.com/go-openapi/testify/v2 v2.0.2 h1:X999g3jeLcoY8qctY/c/Z8iBHTbwLz7R2WXd6Ub6wls=
github.com/go-openapi/testify/v2 v2.0.2/go.mod h1:HCPmvFFnheKK2BuwSA0TbbdxJ3I16pjwMkYkP4Ywn54=
github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1vB6EwHI=
github.com/go-task/slim-sprig/v3 v3.0.0/go.mod h1:W848ghGpv3Qj3dhTPRyJypKRiqCdHZiAzKg9hl15HA8=
github.com/go-test/deep v1.0.8 h1:TDsG77qcSprGbC6vTN8OuXp5g+J+b5Pcguhf7Zt61VM=
github.com/go-test/deep v1.0.8/go.mod h1:5C2ZWiW0ErCdrYzpqxLbTX7MG14M9iiw8DgHncVwcsE=
github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
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go.opentelemetry.io/otel v1.38.0/go.mod h1:zcmtmQ1+YmQM9wrNsTGV/q/uyusom3P8RxwExxkZhjM=
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sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730/go.mod h1:mdzfpAEoE6DHQEN0uh9ZbOCuHbLK5wOm7dK4ctXE9Tg=
sigs.k8s.io/randfill v1.0.0 h1:JfjMILfT8A6RbawdsK2JXGBR5AQVfd+9TbzrlneTyrU=
sigs.k8s.io/randfill v1.0.0/go.mod h1:XeLlZ/jmk4i1HRopwe7/aU3H5n1zNUcX6TM94b3QxOY=
sigs.k8s.io/structured-merge-diff/v6 v6.3.1 h1:JrhdFMqOd/+3ByqlP2I45kTOZmTRLBUm5pvRjeheg7E=
sigs.k8s.io/structured-merge-diff/v6 v6.3.1/go.mod h1:M3W8sfWvn2HhQDIbGWj3S099YozAsymCo/wrT5ohRUE=
sigs.k8s.io/yaml v1.6.0 h1:G8fkbMSAFqgEFgh4b1wmtzDnioxFCUgTZhlbj5P9QYs=
sigs.k8s.io/yaml v1.6.0/go.mod h1:796bPqUfzR/0jLAl6XjHl3Ck7MiyVv8dbTdyT3/pMf4=
github.com/redis/go-redis/v9 v9.5.3 h1:fOAp1/uJG+ZtcITgZOfYFmTKPE7n4Vclj1wZFgRciUU=
github.com/redis/go-redis/v9 v9.5.3/go.mod h1:hdY0cQFCN4fnSYT6TkisLufl/4W5UIXyv0b/CLO2V2M=
golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=

View File

@@ -1,327 +0,0 @@
{
"uid": "cart-actors",
"title": "Cart Actor Cluster",
"timezone": "browser",
"refresh": "30s",
"schemaVersion": 38,
"version": 1,
"editable": true,
"graphTooltip": 0,
"panels": [
{
"type": "row",
"title": "Overview",
"gridPos": { "x": 0, "y": 0, "w": 24, "h": 1 },
"id": 1,
"collapsed": false
},
{
"type": "stat",
"title": "Active Grains",
"id": 2,
"gridPos": { "x": 0, "y": 1, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "cart_active_grains" }
],
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "center",
"reduceOptions": { "calcs": ["lastNotNull"], "fields": "", "values": false }
}
},
{
"type": "stat",
"title": "Grains In Pool",
"id": 3,
"gridPos": { "x": 6, "y": 1, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "cart_grains_in_pool" }
],
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "center",
"reduceOptions": { "calcs": ["lastNotNull"], "fields": "", "values": false }
}
},
{
"type": "stat",
"title": "Pool Usage %",
"id": 4,
"gridPos": { "x": 12, "y": 1, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "cart_grain_pool_usage * 100" }
],
"units": "percent",
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "center",
"reduceOptions": { "calcs": ["lastNotNull"] }
}
},
{
"type": "stat",
"title": "Connected Remotes",
"id": 5,
"gridPos": { "x": 18, "y": 1, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "connected_remotes" }
],
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "center",
"reduceOptions": { "calcs": ["lastNotNull"] }
}
},
{
"type": "row",
"title": "Mutations",
"gridPos": { "x": 0, "y": 5, "w": 24, "h": 1 },
"id": 6,
"collapsed": false
},
{
"type": "timeseries",
"title": "Mutation Rate (1m)",
"id": 7,
"gridPos": { "x": 0, "y": 6, "w": 12, "h": 8 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "rate(cart_mutations_total[1m])", "legendFormat": "mutations/s" },
{ "refId": "B", "expr": "rate(cart_mutation_failures_total[1m])", "legendFormat": "failures/s" }
],
"fieldConfig": { "defaults": { "unit": "ops" } }
},
{
"type": "stat",
"title": "Failure % (5m)",
"id": 8,
"gridPos": { "x": 12, "y": 6, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{
"refId": "A",
"expr": "100 * (increase(cart_mutation_failures_total[5m]) / clamp_max(increase(cart_mutations_total[5m]), 1))"
}
],
"options": {
"colorMode": "value",
"graphMode": "none",
"justifyMode": "center",
"reduceOptions": { "calcs": ["lastNotNull"] }
}
},
{
"type": "timeseries",
"title": "Mutation Latency Quantiles",
"id": 9,
"gridPos": { "x": 18, "y": 6, "w": 6, "h": 8 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{
"refId": "A",
"expr": "histogram_quantile(0.50, sum(rate(cart_mutation_latency_seconds_bucket[5m])) by (le))",
"legendFormat": "p50"
},
{
"refId": "B",
"expr": "histogram_quantile(0.90, sum(rate(cart_mutation_latency_seconds_bucket[5m])) by (le))",
"legendFormat": "p90"
},
{
"refId": "C",
"expr": "histogram_quantile(0.99, sum(rate(cart_mutation_latency_seconds_bucket[5m])) by (le))",
"legendFormat": "p99"
}
],
"fieldConfig": { "defaults": { "unit": "s" } }
},
{
"type": "row",
"title": "Event Log",
"gridPos": { "x": 0, "y": 14, "w": 24, "h": 1 },
"id": 10,
"collapsed": false
},
{
"type": "timeseries",
"title": "Event Append Rate (5m)",
"id": 11,
"gridPos": { "x": 0, "y": 15, "w": 8, "h": 6 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "rate(cart_event_log_appends_total[5m])", "legendFormat": "appends/s" }
]
},
{
"type": "timeseries",
"title": "Event Bytes Written Rate (5m)",
"id": 12,
"gridPos": { "x": 8, "y": 15, "w": 8, "h": 6 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "rate(cart_event_log_bytes_written_total[5m])", "legendFormat": "bytes/s" }
],
"fieldConfig": { "defaults": { "unit": "Bps" } }
},
{
"type": "stat",
"title": "Existing Log Files",
"id": 13,
"gridPos": { "x": 16, "y": 15, "w": 4, "h": 3 },
"datasource": "${DS_PROMETHEUS}",
"targets": [{ "refId": "A", "expr": "cart_event_log_files_existing" }],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] } }
},
{
"type": "stat",
"title": "Last Append Age (s)",
"id": 14,
"gridPos": { "x": 20, "y": 15, "w": 4, "h": 3 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "(time() - cart_event_log_last_append_unix)" }
],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] } }
},
{
"type": "stat",
"title": "Replay Failures Total",
"id": 15,
"gridPos": { "x": 16, "y": 18, "w": 4, "h": 3 },
"datasource": "${DS_PROMETHEUS}",
"targets": [{ "refId": "A", "expr": "cart_event_log_replay_failures_total" }],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] } }
},
{
"type": "stat",
"title": "Replay Duration p95 (5m)",
"id": 16,
"gridPos": { "x": 20, "y": 18, "w": 4, "h": 3 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{
"refId": "A",
"expr": "histogram_quantile(0.95, sum(rate(cart_event_log_replay_duration_seconds_bucket[5m])) by (le))"
}
],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] }, "fieldConfig": { "defaults": { "unit": "s" } } }
},
{
"type": "row",
"title": "Grain Lifecycle",
"gridPos": { "x": 0, "y": 21, "w": 24, "h": 1 },
"id": 17,
"collapsed": false
},
{
"type": "timeseries",
"title": "Spawn & Lookup Rates (1m)",
"id": 18,
"gridPos": { "x": 0, "y": 22, "w": 12, "h": 8 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "rate(cart_grain_spawned_total[1m])", "legendFormat": "spawns/s" },
{ "refId": "B", "expr": "rate(cart_grain_lookups_total[1m])", "legendFormat": "lookups/s" }
]
},
{
"type": "stat",
"title": "Negotiations Rate (5m)",
"id": 19,
"gridPos": { "x": 12, "y": 22, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{ "refId": "A", "expr": "rate(cart_remote_negotiation_total[5m])" }
],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] }, "orientation": "horizontal" }
},
{
"type": "stat",
"title": "Mutations Total",
"id": 20,
"gridPos": { "x": 18, "y": 22, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [{ "refId": "A", "expr": "cart_mutations_total" }],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] } }
},
{
"type": "row",
"title": "Event Log Errors",
"gridPos": { "x": 0, "y": 30, "w": 24, "h": 1 },
"id": 21,
"collapsed": false
},
{
"type": "stat",
"title": "Unknown Event Types",
"id": 22,
"gridPos": { "x": 0, "y": 31, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [{ "refId": "A", "expr": "cart_event_log_unknown_types_total" }],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] } }
},
{
"type": "stat",
"title": "Event Mutation Errors",
"id": 23,
"gridPos": { "x": 6, "y": 31, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [{ "refId": "A", "expr": "cart_event_log_mutation_errors_total" }],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] } }
},
{
"type": "stat",
"title": "Replay Success Total",
"id": 24,
"gridPos": { "x": 12, "y": 31, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [{ "refId": "A", "expr": "cart_event_log_replay_total" }],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] } }
},
{
"type": "stat",
"title": "Replay Duration p50 (5m)",
"id": 25,
"gridPos": { "x": 18, "y": 31, "w": 6, "h": 4 },
"datasource": "${DS_PROMETHEUS}",
"targets": [
{
"refId": "A",
"expr": "histogram_quantile(0.50, sum(rate(cart_event_log_replay_duration_seconds_bucket[5m])) by (le))"
}
],
"options": { "reduceOptions": { "calcs": ["lastNotNull"] }, "fieldConfig": { "defaults": { "unit": "s" } } }
}
],
"templating": {
"list": [
{
"name": "DS_PROMETHEUS",
"label": "Prometheus",
"type": "datasource",
"query": "prometheus",
"current": { "text": "Prometheus", "value": "Prometheus" }
}
]
},
"time": {
"from": "now-6h",
"to": "now"
},
"timepicker": {
"refresh_intervals": ["5s","10s","30s","1m","5m","15m","30m","1h"],
"time_options": ["5m","15m","30m","1h","6h","12h","24h","2d","7d"]
}
}

99
grain-pool.go Normal file
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@@ -0,0 +1,99 @@
package main
import (
"fmt"
"log"
"time"
)
type GrainPool interface {
Process(id CartId, messages ...Message) (interface{}, error)
Get(id CartId) (Grain, error)
}
type Ttl struct {
Expires time.Time
Item *CartGrain
}
type GrainLocalPool struct {
grains map[CartId]*CartGrain
expiry []Ttl
spawn func(id CartId) (*CartGrain, error)
Ttl time.Duration
PoolSize int
}
func NewGrainLocalPool(size int, ttl time.Duration, spawn func(id CartId) (*CartGrain, error)) *GrainLocalPool {
ret := &GrainLocalPool{
spawn: spawn,
grains: make(map[CartId]*CartGrain),
expiry: make([]Ttl, 0),
Ttl: ttl,
PoolSize: size,
}
cartPurge := time.NewTicker(time.Minute)
go func() {
<-cartPurge.C
ret.Purge()
}()
return ret
}
func (p *GrainLocalPool) Purge() {
lastChangeTime := time.Now().Add(-p.Ttl)
keepChanged := lastChangeTime.Unix()
for i := 0; i < len(p.expiry); i++ {
item := p.expiry[i]
if item.Expires.Before(time.Now()) {
if item.Item.GetLastChange() > keepChanged {
log.Printf("Changed item %s expired, keeping", item.Item.GetId())
p.expiry = append(p.expiry[:i], p.expiry[i+1:]...)
p.expiry = append(p.expiry, item)
} else {
log.Printf("Item %s expired", item.Item.GetId())
delete(p.grains, item.Item.GetId())
p.expiry = append(p.expiry[:i], p.expiry[i+1:]...)
}
} else {
break
}
}
}
func (p *GrainLocalPool) GetGrains() map[CartId]*CartGrain {
return p.grains
}
func (p *GrainLocalPool) GetGrain(id CartId) (*CartGrain, error) {
var err error
grain, ok := p.grains[id]
if !ok {
if len(p.grains) >= p.PoolSize {
if p.expiry[0].Expires.Before(time.Now()) {
delete(p.grains, p.expiry[0].Item.GetId())
p.expiry = p.expiry[1:]
} else {
return nil, fmt.Errorf("pool is full")
}
}
grain, err = p.spawn(id)
p.grains[id] = grain
}
return grain, err
}
func (p *GrainLocalPool) Process(id CartId, messages ...Message) (interface{}, error) {
grain, err := p.GetGrain(id)
if err == nil && grain != nil {
for _, message := range messages {
_, err = grain.HandleMessage(&message, false)
}
}
return grain, err
}
func (p *GrainLocalPool) Get(id CartId) (Grain, error) {
return p.GetGrain(id)
}

23
grain-server.go Normal file
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@@ -0,0 +1,23 @@
package main
import (
"fmt"
"net"
"net/rpc"
)
type GrainServer struct {
Host string
}
func NewServer(hostname string) *GrainServer {
return &GrainServer{
Host: hostname,
}
}
func (s *GrainServer) Start(port int, instance Grain) (net.Listener, error) {
rpc.Register(instance)
rpc.HandleHTTP()
return net.Listen("tcp", fmt.Sprintf(":%d", port))
}

View File

@@ -1,174 +0,0 @@
# k6 Load Tests for Cart API
This directory contains a k6 script (`cart_load_test.js`) to stress and observe the cart actor HTTP API.
## Contents
- `cart_load_test.js` primary k6 scenario script
- `README.md` this file
## Prerequisites
- Node not required (k6 runs standalone)
- k6 installed (>= v0.43 recommended)
- Prometheus + Grafana (optional) if you want to correlate with the dashboard you generated
- A running cart service exposing HTTP endpoints at (default) `http://localhost:8080/cart`
## Endpoints Exercised
The script exercises (per iteration):
1. `GET /cart` ensure / fetch cart state (creates cart if missing; sets `cartid` & `cartowner` cookies)
2. `POST /cart` add item mutation (random SKU & quantity)
3. `GET /cart` fetch after mutations
4. `GET /checkout` occasionally (~2% of iterations) to simulate checkout start
You can extend it easily to hit deliveries, quantity changes, or removal endpoints.
## Environment Variables
| Variable | Purpose | Default |
|-----------------|----------------------------------------------|-------------------------|
| `BASE_URL` | Base URL root (either host or host/cart) | `http://localhost:8080/cart` |
| `VUS` | VUs for steady_mutations scenario | `20` |
| `DURATION` | Duration for steady_mutations scenario | `5m` |
| `RAMP_TARGET` | Peak VUs for ramp_up scenario | `50` |
You can also disable one scenario by editing `options.scenarios` inside the script.
Example run:
```bash
k6 run \
-e BASE_URL=https://cart.k6n.net/cart \
-e VUS=40 \
-e DURATION=1m \
-e RAMP_TARGET=120 \
k6/cart_load_test.js
```
## Metrics (Custom)
The script defines additional k6 metrics:
- `cart_add_item_duration` (Trend) latency of POST add item
- `cart_fetch_duration` (Trend) latency of GET cart state
- `cart_checkout_duration` (Trend) latency of checkout
- `cart_items_added` (Counter) successful add item operations
- `cart_checkout_calls` (Counter) successful checkout calls
Thresholds (in `options.thresholds`) enforce basic SLO:
- Mutation failure rate < 2%
- p90 mutation latency < 800 ms
- p99 overall HTTP latency < 1500 ms
Adjust thresholds to your environment if they trigger prematurely.
## Cookies & Stickiness
The script preserves:
- `cartid` cart identity (server sets expiry separately)
- `cartowner` owning host for sticky routing
If your load balancer or ingress enforces affinity based on these cookies, traffic will naturally concentrate on the originally claimed host for each cart under test.
## SKU Set
SKUs used (randomly selected each mutation):
```
778290 778345 778317 778277 778267 778376 778244 778384
778365 778377 778255 778286 778246 778270 778266 778285
778329 778425 778407 778418 778430 778469 778358 778351
778319 778307 778278 778251 778253 778261 778263 778273
778281 778294 778297 778302
```
To add/remove SKUs, edit the `SKUS` array. Keeping it non-empty and moderately sized helps randomization.
## Extending the Script
### Add Quantity Change
```js
function changeQuantity(itemId, newQty) {
const payload = JSON.stringify({ Id: itemId, Qty: newQty });
http.put(baseUrl() + '/', payload, { headers: headers() });
}
```
### Remove Item
```js
function removeItem(itemId) {
http.del(baseUrl() + '/' + itemId, null, { headers: headers() });
}
```
### Add Delivery
```js
function addDelivery(itemIds) {
const payload = JSON.stringify({ provider: "POSTNORD", items: itemIds });
http.post(baseUrl() + '/delivery', payload, { headers: headers() });
}
```
You can integrate these into the iteration loop with probabilities.
## Output Summary
`handleSummary` outputs a JSON summary to stdout:
- Average & p95 mutation latencies (if present)
- Fetch p95
- Checkout count
- Check statuses
Redirect or parse that output for CI pipelines.
## Running in CI
Use shorter durations (e.g. `DURATION=2m VUS=10`) to keep builds fast. Fail build on threshold breaches:
```bash
k6 run -e BASE_URL=$TARGET -e VUS=10 -e DURATION=2m k6/cart_load_test.js || exit 1
```
## Correlating with Prometheus / Grafana
During load, observe:
- `cart_mutations_total` growth and latency histograms
- Event log write rate (`cart_event_log_appends_total`)
- Pool usage (`cart_grain_pool_usage`) and spawn rate (`cart_grain_spawned_total`)
- Failure counters (`cart_mutation_failures_total`) ensure they remain low
If mutation latency spikes without high error rate, inspect external dependencies (e.g., product fetcher or Klarna endpoints).
## Common Tuning Tips
| Symptom | Potential Adjustment |
|------------------------------------|---------------------------------------------------|
| High latency p99 | Increase CPU/memory, optimize mutation handlers |
| Pool at capacity | Raise pool size argument or TTL |
| Frequent cart eviction mid-test | Confirm TTL is sliding (now 2h on mutation) |
| High replay duration | Consider snapshot + truncate event logs |
| Uneven host load | Verify `cartowner` cookie is respected upstream |
## Safety / Load Guardrails
- Start with low VUs (510) and short duration.
- Scale incrementally to find saturation points.
- If using production endpoints, coordinate off-peak runs.
## License / Attribution
This test script is tailored for your internal cart actor system; adapt freely. k6 is open-source (AGPL v3). Ensure compliance if redistributing.
---
Feel free to request:
- A variant script for spike tests
- WebSocket / long poll integration (if added later)
- Synthetic error injection harness
Happy load testing!

View File

@@ -1,244 +0,0 @@
import http from "k6/http";
import { check, sleep, group } from "k6";
import { Counter, Trend } from "k6/metrics";
// ---------------- Configuration ----------------
export const options = {
// Adjust vus/duration for your environment
scenarios: {
steady_mutations: {
executor: "constant-vus",
vus: __ENV.VUS ? parseInt(__ENV.VUS, 10) : 20,
duration: __ENV.DURATION || "5m",
gracefulStop: "30s",
},
ramp_up: {
executor: "ramping-vus",
startVUs: 0,
stages: [
{
duration: "1m",
target: __ENV.RAMP_TARGET ? parseInt(__ENV.RAMP_TARGET, 10) : 50,
},
{
duration: "1m",
target: __ENV.RAMP_TARGET ? parseInt(__ENV.RAMP_TARGET, 10) : 50,
},
{ duration: "1m", target: 0 },
],
gracefulStop: "30s",
startTime: "30s",
},
},
thresholds: {
http_req_failed: ["rate<0.02"], // < 2% failures
http_req_duration: ["p(90)<800", "p(99)<1500"], // latency SLO
"cart_add_item_duration{op:add}": ["p(90)<800"],
"cart_fetch_duration{op:get}": ["p(90)<600"],
},
summaryTrendStats: ["avg", "min", "med", "max", "p(90)", "p(95)", "p(99)"],
};
// ---------------- Metrics ----------------
const addItemTrend = new Trend("cart_add_item_duration", true);
const fetchTrend = new Trend("cart_fetch_duration", true);
const checkoutTrend = new Trend("cart_checkout_duration", true);
const addedItemsCounter = new Counter("cart_items_added");
const checkoutCounter = new Counter("cart_checkout_calls");
// ---------------- SKUs ----------------
const SKUS = [
"778290",
"778345",
"778317",
"778277",
"778267",
"778376",
"778244",
"778384",
"778365",
"778377",
"778255",
"778286",
"778246",
"778270",
"778266",
"778285",
"778329",
"778425",
"778407",
"778418",
"778430",
"778469",
"778358",
"778351",
"778319",
"778307",
"778278",
"778251",
"778253",
"778261",
"778263",
"778273",
"778281",
"778294",
"778297",
"778302",
];
// ---------------- Helpers ----------------
function randomSku() {
return SKUS[Math.floor(Math.random() * SKUS.length)];
}
function randomQty() {
return 1 + Math.floor(Math.random() * 3); // 1..3
}
function baseUrl() {
const u = __ENV.BASE_URL || "http://localhost:8080/cart";
// Allow user to pass either root host or full /cart path
return u.endsWith("/cart") ? u : u.replace(/\/+$/, "") + "/cart";
}
function extractCookie(res, name) {
const cookies = res.cookies[name];
if (!cookies || cookies.length === 0) return null;
return cookies[0].value;
}
function withCookies(headers, cookieJar) {
if (!cookieJar || Object.keys(cookieJar).length === 0) return headers;
const cookieStr = Object.entries(cookieJar)
.map(([k, v]) => `${k}=${v}`)
.join("; ");
return { ...headers, Cookie: cookieStr };
}
// Maintain cart + owner cookies per VU
let cartState = {
cartid: null,
cartowner: null,
};
// Refresh cookies from response
function updateCookies(res) {
const cid = extractCookie(res, "cartid");
if (cid) cartState.cartid = cid;
const owner = extractCookie(res, "cartowner");
if (owner) cartState.cartowner = owner;
}
// Build headers
function headers() {
const h = { "Content-Type": "application/json" };
const jar = {};
if (cartState.cartid) jar["cartid"] = cartState.cartid;
if (cartState.cartowner) jar["cartowner"] = cartState.cartowner;
return withCookies(h, jar);
}
// Ensure cart exists (GET /)
function ensureCart() {
if (cartState.cartid) return;
const res = http.get(baseUrl(), { headers: headers() });
updateCookies(res);
check(res, {
"ensure cart status 200": (r) => r.status === 200,
"ensure cart has id": () => !!cartState.cartid,
});
}
// Add random item
function addRandomItem() {
const payload = JSON.stringify({
sku: randomSku(),
quantity: randomQty(),
country: "no",
});
const start = Date.now();
const res = http.post(baseUrl(), payload, { headers: headers() });
const dur = Date.now() - start;
addItemTrend.add(dur, { op: "add" });
if (res.status === 200) {
addedItemsCounter.add(1);
}
updateCookies(res);
check(res, {
"add item status ok": (r) => r.status === 200,
});
}
// Fetch cart state
function fetchCart() {
const start = Date.now();
const res = http.get(baseUrl(), { headers: headers() });
const dur = Date.now() - start;
fetchTrend.add(dur, { op: "get" });
updateCookies(res);
check(res, { "fetch status ok": (r) => r.status === 200 });
}
// Occasional checkout trigger
function maybeCheckout() {
if (!cartState.cartid) return;
// // Small probability
// if (Math.random() < 0.02) {
// const start = Date.now();
// const res = http.get(baseUrl() + "/checkout", { headers: headers() });
// const dur = Date.now() - start;
// checkoutTrend.add(dur, { op: "checkout" });
// updateCookies(res);
// if (res.status === 200) checkoutCounter.add(1);
// check(res, { "checkout status ok": (r) => r.status === 200 });
// }
}
// ---------------- k6 lifecycle ----------------
export function setup() {
// Provide SKU list length for summary
return { skuCount: SKUS.length };
}
export default function (data) {
group("cart flow", () => {
// Create or reuse cart
ensureCart();
// Random number of item mutations per iteration (1..5)
const ops = 1 + Math.floor(Math.random() * 5);
for (let i = 0; i < ops; i++) {
addRandomItem();
}
// Fetch state
fetchCart();
// Optional checkout attempt
maybeCheckout();
});
// Small think time
sleep(Math.random() * 0.5);
}
export function teardown(data) {
// Optionally we could GET confirmation or clear cart cookie
// Not implemented for load purpose.
console.log(`Test complete. SKU count: ${data.skuCount}`);
}
// ---------------- Summary ----------------
export function handleSummary(data) {
return {
stdout: JSON.stringify(
{
metrics: {
mutations_avg: data.metrics.cart_add_item_duration?.avg,
mutations_p95: data.metrics.cart_add_item_duration?.p(95),
fetch_p95: data.metrics.cart_fetch_duration?.p(95),
checkout_count: data.metrics.cart_checkout_calls?.count,
},
checks: data.root_checks,
},
null,
2,
),
};
}

137
main.go Normal file
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package main
import (
"encoding/json"
"log"
"net/http"
"os"
"time"
messages "git.tornberg.me/go-cart-actor/proto"
)
func spawn(id CartId) (*CartGrain, error) {
ret := &CartGrain{
Id: id,
Items: []CartItem{},
storageMessages: []Message{},
TotalPrice: 0,
}
err := loadMessages(ret, id)
return ret, err
}
func init() {
os.Mkdir("data", 0755)
}
type App struct {
pool *GrainLocalPool
storage *DiskStorage
}
func (a *App) HandleGet(w http.ResponseWriter, r *http.Request) {
id := r.PathValue("id")
grain, err := a.pool.Get(ToCartId(id))
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
json.NewEncoder(w).Encode(grain)
}
func (a *App) HandleAddSku(w http.ResponseWriter, r *http.Request) {
id := r.PathValue("id")
sku := r.PathValue("sku")
grain, err := a.pool.Process(ToCartId(id), Message{
Type: AddRequestType,
Content: &messages.AddRequest{Sku: sku},
})
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
json.NewEncoder(w).Encode(grain)
}
func (a *App) Save() error {
for id, grain := range a.pool.GetGrains() {
err := a.storage.Store(id, grain)
if err != nil {
log.Printf("Error saving grain %s: %v\n", id, err)
}
}
return a.storage.saveState()
}
func (a *App) HandleSave(w http.ResponseWriter, r *http.Request) {
err := a.Save()
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
} else {
w.WriteHeader(http.StatusCreated)
}
}
func main() {
// Create a new instance of the server
storage, err := NewDiskStorage("data/state.gob")
if err != nil {
log.Printf("Error loading state: %v\n", err)
}
app := &App{
pool: NewGrainLocalPool(1000, 5*time.Minute, spawn),
storage: storage,
}
rpcHandler, err := NewGrainHandler(app.pool, "localhost:1337")
if err != nil {
log.Fatalf("Error creating handler: %v\n", err)
}
go rpcHandler.Serve()
remotePool := NewRemoteGrainPool("localhost:1337")
mux := http.NewServeMux()
mux.HandleFunc("GET /api/{id}", app.HandleGet)
mux.HandleFunc("GET /api/{id}/add/{sku}", app.HandleAddSku)
mux.HandleFunc("GET /remote/{id}/add", func(w http.ResponseWriter, r *http.Request) {
id := r.PathValue("id")
ts := time.Now().Unix()
data, err := remotePool.Process(ToCartId(id), Message{
Type: AddRequestType,
TimeStamp: &ts,
Content: &messages.AddRequest{Sku: "49565"},
})
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(data)
})
mux.HandleFunc("GET /remote/{id}", func(w http.ResponseWriter, r *http.Request) {
id := r.PathValue("id")
data, err := remotePool.Get(ToCartId(id))
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(data)
})
mux.HandleFunc("GET /save", app.HandleSave)
http.ListenAndServe(":8080", mux)
}

6
message-types.go Normal file
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@@ -0,0 +1,6 @@
package main
const (
AddRequestType = 1
AddItemType = 2
)

111
message.go Normal file
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package main
import (
"bytes"
"encoding/binary"
"fmt"
"io"
"time"
messages "git.tornberg.me/go-cart-actor/proto"
"google.golang.org/protobuf/proto"
)
type StorableMessage interface {
Write(w io.Writer) error
}
type Message struct {
Type uint16
TimeStamp *int64
Content interface{}
}
type MessageWriter struct {
io.Writer
}
type StorableMessageHeader struct {
Version uint16
Type uint16
TimeStamp int64
DataLength uint64
}
func GetData(fn func(w io.Writer) error) ([]byte, error) {
var buf bytes.Buffer
err := fn(&buf)
if err != nil {
return nil, err
}
b := buf.Bytes()
return b, nil
}
func (m Message) Write(w io.Writer) error {
data, err := GetData(func(wr io.Writer) error {
if m.Type == AddRequestType {
messageBytes, err := proto.Marshal(m.Content.(*messages.AddRequest))
if err != nil {
return err
}
wr.Write(messageBytes)
} else if m.Type == AddItemType {
messageBytes, err := proto.Marshal(m.Content.(*messages.AddItem))
if err != nil {
return err
}
wr.Write(messageBytes)
}
return nil
})
if err != nil {
return err
}
ts := time.Now().Unix()
if m.TimeStamp != nil {
ts = *m.TimeStamp
}
err = binary.Write(w, binary.LittleEndian, StorableMessageHeader{
Version: 1,
Type: m.Type,
TimeStamp: ts,
DataLength: uint64(len(data)),
})
w.Write(data)
return err
}
func MessageFromReader(reader io.Reader, m *Message) error {
header := StorableMessageHeader{}
err := binary.Read(reader, binary.LittleEndian, &header)
if err != nil {
return err
}
messageBytes := make([]byte, header.DataLength)
_, err = reader.Read(messageBytes)
if err != nil {
return err
}
switch header.Type {
case AddRequestType:
msg := &messages.AddRequest{}
err = proto.Unmarshal(messageBytes, msg)
m.Content = msg
case AddItemType:
msg := &messages.AddItem{}
err = proto.Unmarshal(messageBytes, msg)
m.Content = msg
default:
return fmt.Errorf("unknown message type")
}
if err != nil {
return err
}
m.Type = header.Type
m.TimeStamp = &header.TimeStamp
return nil
}

76
packet.go Normal file
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package main
import (
"encoding/binary"
"io"
)
const (
RemoteGetState = uint16(0x01)
RemoteHandleMessage = uint16(0x02)
ResponseBody = uint16(0x03)
)
type CartPacket struct {
Version uint16
MessageType uint16
Id CartId
DataLength uint16
}
type ResponsePacket struct {
Version uint16
MessageType uint16
DataLength uint16
}
func SendCartPacket(conn io.Writer, id CartId, messageType uint16, datafn func(w io.Writer) error) error {
data, err := GetData(datafn)
if err != nil {
return err
}
binary.Write(conn, binary.LittleEndian, CartPacket{
Version: 2,
MessageType: messageType,
Id: id,
DataLength: uint16(len(data)),
})
_, err = conn.Write(data)
return err
}
func SendPacket(conn io.Writer, messageType uint16, datafn func(w io.Writer) error) error {
data, err := GetData(datafn)
if err != nil {
return err
}
binary.Write(conn, binary.LittleEndian, ResponsePacket{
Version: 1,
MessageType: messageType,
DataLength: uint16(len(data)),
})
_, err = conn.Write(data)
return err
}
// func ReceiveCartPacket(conn io.Reader) (CartPacket, []byte, error) {
// var packet CartPacket
// err := binary.Read(conn, binary.LittleEndian, &packet)
// if err != nil {
// return packet, nil, err
// }
// data := make([]byte, packet.DataLength)
// _, err = conn.Read(data)
// return packet, data, err
// }
func ReceivePacket(conn io.Reader) (uint16, []byte, error) {
var packet ResponsePacket
err := binary.Read(conn, binary.LittleEndian, &packet)
if err != nil {
return packet.MessageType, nil, err
}
data := make([]byte, packet.DataLength)
_, err = conn.Read(data)
return packet.MessageType, data, err
}

View File

@@ -1,131 +0,0 @@
package actor
import (
"crypto/rand"
"encoding/json"
"fmt"
)
type GrainId uint64
const base62Alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
// Reverse lookup (0xFF marks invalid)
var base62Rev [256]byte
func init() {
for i := range base62Rev {
base62Rev[i] = 0xFF
}
for i := 0; i < len(base62Alphabet); i++ {
base62Rev[base62Alphabet[i]] = byte(i)
}
}
// String returns the canonical base62 encoding of the 64-bit id.
func (id GrainId) String() string {
return encodeBase62(uint64(id))
}
// MarshalJSON encodes the cart id as a JSON string.
func (id GrainId) MarshalJSON() ([]byte, error) {
return json.Marshal(id.String())
}
// UnmarshalJSON decodes a cart id from a JSON string containing base62 text.
func (id *GrainId) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
parsed, ok := ParseGrainId(s)
if !ok {
return fmt.Errorf("invalid cart id: %q", s)
}
*id = parsed
return nil
}
// NewGrainId generates a new cryptographically random non-zero 64-bit id.
func NewGrainId() (GrainId, error) {
var b [8]byte
if _, err := rand.Read(b[:]); err != nil {
return 0, fmt.Errorf("NewGrainId: %w", err)
}
u := (uint64(b[0]) << 56) |
(uint64(b[1]) << 48) |
(uint64(b[2]) << 40) |
(uint64(b[3]) << 32) |
(uint64(b[4]) << 24) |
(uint64(b[5]) << 16) |
(uint64(b[6]) << 8) |
uint64(b[7])
if u == 0 {
// Extremely unlikely; regenerate once to avoid "0" identifier if desired.
return NewGrainId()
}
return GrainId(u), nil
}
// MustNewGrainId panics if generation fails.
func MustNewGrainId() GrainId {
id, err := NewGrainId()
if err != nil {
panic(err)
}
return id
}
// ParseGrainId parses a base62 string into a GrainId.
// Returns (0,false) for invalid input.
func ParseGrainId(s string) (GrainId, bool) {
// Accept length 1..11 (11 sufficient for 64 bits). Reject >11 immediately.
// Provide a slightly looser upper bound (<=16) only if you anticipate future
// extensions; here we stay strict.
if len(s) == 0 || len(s) > 11 {
return 0, false
}
u, ok := decodeBase62(s)
if !ok {
return 0, false
}
return GrainId(u), true
}
// MustParseGrainId panics on invalid base62 input.
func MustParseGrainId(s string) GrainId {
id, ok := ParseGrainId(s)
if !ok {
panic(fmt.Sprintf("invalid cart id: %q", s))
}
return id
}
// encodeBase62 converts a uint64 to base62 (shortest form).
func encodeBase62(u uint64) string {
if u == 0 {
return "0"
}
var buf [11]byte
i := len(buf)
for u > 0 {
i--
buf[i] = base62Alphabet[u%62]
u /= 62
}
return string(buf[i:])
}
// decodeBase62 converts base62 text to uint64.
func decodeBase62(s string) (uint64, bool) {
var v uint64
for i := 0; i < len(s); i++ {
c := s[i]
d := base62Rev[c]
if d == 0xFF {
return 0, false
}
v = v*62 + uint64(d)
}
return v, true
}

View File

@@ -1,162 +0,0 @@
package actor
import (
"context"
"errors"
"fmt"
"log"
"os"
"path/filepath"
"sync"
"time"
"google.golang.org/protobuf/proto"
)
type QueueEvent struct {
TimeStamp time.Time
Message proto.Message
}
type DiskStorage[V any] struct {
*StateStorage
path string
done chan struct{}
queue *sync.Map // map[uint64][]QueueEvent
}
type LogStorage[V any] interface {
LoadEvents(ctx context.Context, id uint64, grain Grain[V]) error
LoadEventsFunc(ctx context.Context, id uint64, grain Grain[V], condition func(msg proto.Message, index int, timeStamp time.Time) bool) error
AppendMutations(id uint64, msg ...proto.Message) error
}
func NewDiskStorage[V any](path string, registry MutationRegistry) *DiskStorage[V] {
return &DiskStorage[V]{
StateStorage: NewState(registry),
path: path,
done: make(chan struct{}),
}
}
func (s *DiskStorage[V]) SaveLoop(duration time.Duration) {
s.queue = &sync.Map{}
ticker := time.NewTicker(duration)
defer ticker.Stop()
for {
select {
case <-s.done:
s.save()
return
case <-ticker.C:
s.save()
}
}
}
func (s *DiskStorage[V]) save() {
carts := 0
lines := 0
s.queue.Range(func(key, value any) bool {
id := key.(uint64)
path := s.logPath(id)
fh, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Printf("failed to open event log file: %v", err)
return true
}
defer fh.Close()
if qe, ok := value.([]QueueEvent); ok {
for _, msg := range qe {
if err := s.Append(fh, msg.Message, msg.TimeStamp); err != nil {
log.Printf("failed to append event to log file: %v", err)
}
lines++
}
}
carts++
s.queue.Delete(id)
return true
})
if lines > 0 {
log.Printf("Appended %d carts and %d lines to disk", carts, lines)
}
}
func (s *DiskStorage[V]) logPath(id uint64) string {
return filepath.Join(s.path, fmt.Sprintf("%d.events.log", id))
}
func (s *DiskStorage[V]) LoadEventsFunc(ctx context.Context, id uint64, grain Grain[V], condition func(msg proto.Message, index int, timeStamp time.Time) bool) error {
path := s.logPath(id)
if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
// No log -> nothing to replay
return nil
}
fh, err := os.Open(path)
if err != nil {
return fmt.Errorf("open replay file: %w", err)
}
defer fh.Close()
index := 0
return s.Load(fh, func(msg proto.Message, when time.Time) {
if condition(msg, index, when) {
s.registry.Apply(ctx, grain, msg)
}
index++
})
}
func (s *DiskStorage[V]) LoadEvents(ctx context.Context, id uint64, grain Grain[V]) error {
path := s.logPath(id)
if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
// No log -> nothing to replay
return nil
}
fh, err := os.Open(path)
if err != nil {
return fmt.Errorf("open replay file: %w", err)
}
defer fh.Close()
return s.Load(fh, func(msg proto.Message, _ time.Time) {
s.registry.Apply(ctx, grain, msg)
})
}
func (s *DiskStorage[V]) Close() {
if s.queue != nil {
s.save()
}
close(s.done)
}
func (s *DiskStorage[V]) AppendMutations(id uint64, msg ...proto.Message) error {
if s.queue != nil {
queue := make([]QueueEvent, 0)
data, found := s.queue.Load(id)
if found {
queue = data.([]QueueEvent)
}
for _, m := range msg {
queue = append(queue, QueueEvent{Message: m, TimeStamp: time.Now()})
}
s.queue.Store(id, queue)
return nil
} else {
path := s.logPath(id)
fh, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Printf("failed to open event log file: %v", err)
return err
}
defer fh.Close()
for _, m := range msg {
err = s.Append(fh, m, time.Now())
}
return err
}
}

View File

@@ -1,13 +0,0 @@
package actor
import (
"time"
)
type Grain[V any] interface {
GetId() uint64
GetLastAccess() time.Time
GetLastChange() time.Time
GetCurrentState() (*V, error)
}

View File

@@ -1,46 +0,0 @@
package actor
import (
"context"
"io"
"net/http"
"google.golang.org/protobuf/proto"
)
type MutationResult[V any] struct {
Result V `json:"result"`
Mutations []ApplyResult `json:"mutations,omitempty"`
}
type GrainPool[V any] interface {
Apply(ctx context.Context, id uint64, mutation ...proto.Message) (*MutationResult[V], error)
Get(ctx context.Context, id uint64) (*V, error)
OwnerHost(id uint64) (Host[V], bool)
Hostname() string
TakeOwnership(id uint64)
HandleOwnershipChange(host string, ids []uint64) error
HandleRemoteExpiry(host string, ids []uint64) error
Negotiate(otherHosts []string)
GetLocalIds() []uint64
IsHealthy() bool
Close()
IsKnown(string) bool
RemoveHost(host string)
AddRemoteHost(host string)
}
// Host abstracts a remote node capable of proxying cart requests.
type Host[V any] interface {
AnnounceExpiry(ids []uint64)
Negotiate(otherHosts []string) ([]string, error)
Name() string
Proxy(id uint64, w http.ResponseWriter, r *http.Request, customBody io.Reader) (bool, error)
Apply(ctx context.Context, id uint64, mutation ...proto.Message) (*MutationResult[V], error)
Get(ctx context.Context, id uint64) (*V, error)
GetActorIds() []uint64
Close() error
Ping() bool
IsHealthy() bool
AnnounceOwnership(ownerHost string, ids []uint64)
}

View File

@@ -1,301 +0,0 @@
package actor
import (
"context"
"encoding/json"
"fmt"
"log"
"net"
"time"
messages "git.k6n.net/go-cart-actor/proto/control"
"go.opentelemetry.io/contrib/bridges/otelslog"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
)
// ControlServer implements the ControlPlane gRPC services.
// It delegates to a grain pool and cluster operations to a synced pool.
type ControlServer[V any] struct {
messages.UnimplementedControlPlaneServer
pool GrainPool[V]
}
const name = "grpc_server"
var (
tracer = otel.Tracer(name)
meter = otel.Meter(name)
logger = otelslog.NewLogger(name)
pingCalls metric.Int64Counter
negotiateCalls metric.Int64Counter
getLocalActorIdsCalls metric.Int64Counter
announceOwnershipCalls metric.Int64Counter
announceExpiryCalls metric.Int64Counter
closingCalls metric.Int64Counter
)
func init() {
var err error
pingCalls, err = meter.Int64Counter("grpc.ping_calls",
metric.WithDescription("Number of ping calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
negotiateCalls, err = meter.Int64Counter("grpc.negotiate_calls",
metric.WithDescription("Number of negotiate calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
getLocalActorIdsCalls, err = meter.Int64Counter("grpc.get_local_actor_ids_calls",
metric.WithDescription("Number of get local actor ids calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
announceOwnershipCalls, err = meter.Int64Counter("grpc.announce_ownership_calls",
metric.WithDescription("Number of announce ownership calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
announceExpiryCalls, err = meter.Int64Counter("grpc.announce_expiry_calls",
metric.WithDescription("Number of announce expiry calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
closingCalls, err = meter.Int64Counter("grpc.closing_calls",
metric.WithDescription("Number of closing calls"),
metric.WithUnit("{calls}"))
if err != nil {
panic(err)
}
}
func (s *ControlServer[V]) AnnounceOwnership(ctx context.Context, req *messages.OwnershipAnnounce) (*messages.OwnerChangeAck, error) {
ctx, span := tracer.Start(ctx, "grpc_announce_ownership")
defer span.End()
span.SetAttributes(
attribute.String("component", "controlplane"),
attribute.String("host", req.Host),
attribute.Int("id_count", len(req.Ids)),
)
logger.InfoContext(ctx, "announce ownership", "host", req.Host, "id_count", len(req.Ids))
announceOwnershipCalls.Add(ctx, 1, metric.WithAttributes(attribute.String("host", req.Host)))
err := s.pool.HandleOwnershipChange(req.Host, req.Ids)
if err != nil {
span.RecordError(err)
return &messages.OwnerChangeAck{
Accepted: false,
Message: "owner change failed",
}, err
}
// log.Printf("Ack count: %d", len(req.Ids))
return &messages.OwnerChangeAck{
Accepted: true,
Message: "ownership announced",
}, nil
}
func toAny[V any](grain V) (*anypb.Any, error) {
data, err := json.Marshal(grain)
if err != nil {
return nil, err
}
return &anypb.Any{
Value: data,
}, nil
}
func (s *ControlServer[V]) Get(ctx context.Context, req *messages.GetRequest) (*messages.GetReply, error) {
grain, err := s.pool.Get(ctx, req.Id)
if err != nil {
return nil, err
}
grainAny, err := toAny(grain)
if err != nil {
return nil, err
}
return &messages.GetReply{
Grain: grainAny,
}, nil
}
func (s *ControlServer[V]) AnnounceExpiry(ctx context.Context, req *messages.ExpiryAnnounce) (*messages.OwnerChangeAck, error) {
ctx, span := tracer.Start(ctx, "grpc_announce_expiry")
defer span.End()
span.SetAttributes(
attribute.String("component", "controlplane"),
attribute.String("host", req.Host),
attribute.Int("id_count", len(req.Ids)),
)
logger.InfoContext(ctx, "announce expiry", "host", req.Host, "id_count", len(req.Ids))
announceExpiryCalls.Add(ctx, 1, metric.WithAttributes(attribute.String("host", req.Host)))
err := s.pool.HandleRemoteExpiry(req.Host, req.Ids)
if err != nil {
span.RecordError(err)
}
return &messages.OwnerChangeAck{
Accepted: err == nil,
Message: "expiry acknowledged",
}, nil
}
// ControlPlane: Ping
func (s *ControlServer[V]) Ping(ctx context.Context, req *messages.Empty) (*messages.PingReply, error) {
host := s.pool.Hostname()
pingCalls.Add(ctx, 1, metric.WithAttributes(attribute.String("host", host)))
// log.Printf("got ping")
return &messages.PingReply{
Host: host,
UnixTime: time.Now().Unix(),
}, nil
}
func (s *ControlServer[V]) Apply(ctx context.Context, in *messages.ApplyRequest) (*messages.ApplyResult, error) {
msgs := make([]proto.Message, len(in.Messages))
for i, anyMsg := range in.Messages {
msg, err := anyMsg.UnmarshalNew()
if err != nil {
return nil, fmt.Errorf("failed to unmarshal message: %w", err)
}
msgs[i] = msg
}
r, err := s.pool.Apply(ctx, in.Id, msgs...)
if err != nil {
return nil, err
}
grainAny, err := toAny(r)
if err != nil {
return nil, err
}
mutList := make([]*messages.MutationResult, len(in.Messages))
for i, msg := range r.Mutations {
mut, err := anypb.New(msg.Mutation)
if err != nil {
return nil, err
}
var errString *string
if msg.Error != nil {
s := msg.Error.Error()
errString = &s
}
mutList[i] = &messages.MutationResult{
Type: msg.Type,
Message: mut,
Error: errString,
}
}
return &messages.ApplyResult{
State: grainAny,
Mutations: mutList,
}, nil
}
// ControlPlane: Negotiate (merge host views)
func (s *ControlServer[V]) Negotiate(ctx context.Context, req *messages.NegotiateRequest) (*messages.NegotiateReply, error) {
ctx, span := tracer.Start(ctx, "grpc_negotiate")
defer span.End()
span.SetAttributes(
attribute.String("component", "controlplane"),
attribute.Int("known_hosts_count", len(req.KnownHosts)),
)
logger.InfoContext(ctx, "negotiate", "known_hosts_count", len(req.KnownHosts))
negotiateCalls.Add(ctx, 1)
s.pool.Negotiate(req.KnownHosts)
return &messages.NegotiateReply{Hosts: req.GetKnownHosts()}, nil
}
// ControlPlane: GetCartIds (locally owned carts only)
func (s *ControlServer[V]) GetLocalActorIds(ctx context.Context, req *messages.Empty) (*messages.ActorIdsReply, error) {
ctx, span := tracer.Start(ctx, "grpc_get_local_actor_ids")
defer span.End()
ids := s.pool.GetLocalIds()
span.SetAttributes(
attribute.String("component", "controlplane"),
attribute.Int("id_count", len(ids)),
)
logger.InfoContext(ctx, "get local actor ids", "id_count", len(ids))
getLocalActorIdsCalls.Add(ctx, 1)
return &messages.ActorIdsReply{Ids: ids}, nil
}
// ControlPlane: Closing (peer shutdown notification)
func (s *ControlServer[V]) Closing(ctx context.Context, req *messages.ClosingNotice) (*messages.OwnerChangeAck, error) {
ctx, span := tracer.Start(ctx, "grpc_closing")
defer span.End()
host := req.GetHost()
span.SetAttributes(
attribute.String("component", "controlplane"),
attribute.String("host", host),
)
logger.InfoContext(ctx, "closing notice", "host", host)
closingCalls.Add(ctx, 1, metric.WithAttributes(attribute.String("host", host)))
if host != "" {
s.pool.RemoveHost(host)
}
return &messages.OwnerChangeAck{
Accepted: true,
Message: "removed host",
}, nil
}
type ServerConfig struct {
Addr string
Options []grpc.ServerOption
}
func NewServerConfig(addr string, options ...grpc.ServerOption) ServerConfig {
return ServerConfig{
Addr: addr,
Options: options,
}
}
func DefaultServerConfig() ServerConfig {
return NewServerConfig(":1337")
}
// StartGRPCServer configures and starts the unified gRPC server on the given address.
// It registers both the CartActor and ControlPlane services.
func NewControlServer[V any](config ServerConfig, pool GrainPool[V]) (*grpc.Server, error) {
lis, err := net.Listen("tcp", config.Addr)
if err != nil {
return nil, fmt.Errorf("failed to listen: %w", err)
}
grpcServer := grpc.NewServer(config.Options...)
server := &ControlServer[V]{
pool: pool,
}
messages.RegisterControlPlaneServer(grpcServer, server)
reflection.Register(grpcServer)
log.Printf("gRPC server listening as %s on %s", pool.Hostname(), config.Addr)
go func() {
if err := grpcServer.Serve(lis); err != nil {
log.Fatalf("failed to serve gRPC: %v", err)
}
}()
return grpcServer, nil
}

View File

@@ -1,150 +0,0 @@
package actor
import (
"context"
"testing"
cart_messages "git.k6n.net/go-cart-actor/proto/cart"
control_plane_messages "git.k6n.net/go-cart-actor/proto/control"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
)
// MockGrainPool for testing
type mockGrainPool struct {
applied []proto.Message
}
func (m *mockGrainPool) Apply(ctx context.Context, id uint64, mutations ...proto.Message) (*MutationResult[mockGrain], error) {
m.applied = mutations
// Simulate successful application
return &MutationResult[mockGrain]{
Result: mockGrain{},
Mutations: []ApplyResult{
{Type: "AddItem", Mutation: &cart_messages.AddItem{ItemId: 1, Quantity: 2}, Error: nil},
{Type: "RemoveItem", Mutation: &cart_messages.RemoveItem{Id: 1}, Error: nil},
},
}, nil
}
func (m *mockGrainPool) Get(ctx context.Context, id uint64) (*mockGrain, error) {
return &mockGrain{}, nil
}
func (m *mockGrainPool) OwnerHost(id uint64) (Host[mockGrain], bool) {
return nil, false
}
func (m *mockGrainPool) TakeOwnership(id uint64) {}
func (m *mockGrainPool) Hostname() string { return "test-host" }
func (m *mockGrainPool) HandleOwnershipChange(host string, ids []uint64) error { return nil }
func (m *mockGrainPool) HandleRemoteExpiry(host string, ids []uint64) error { return nil }
func (m *mockGrainPool) Negotiate(hosts []string) {}
func (m *mockGrainPool) GetLocalIds() []uint64 { return []uint64{} }
func (m *mockGrainPool) RemoveHost(host string) {}
func (m *mockGrainPool) AddRemoteHost(host string) {}
func (m *mockGrainPool) IsHealthy() bool { return true }
func (m *mockGrainPool) IsKnown(host string) bool { return false }
func (m *mockGrainPool) Close() {}
type mockGrain struct{}
func TestApplyRequestWithMutations(t *testing.T) {
// Setup mock pool
pool := &mockGrainPool{}
// Create gRPC server
server, err := NewControlServer[mockGrain](DefaultServerConfig(), pool)
if err != nil {
t.Fatalf("failed to create server: %v", err)
}
defer server.GracefulStop()
// Create client connection
conn, err := grpc.Dial("localhost:1337", grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer conn.Close()
client := control_plane_messages.NewControlPlaneClient(conn)
// Prepare ApplyRequest with multiple Any messages
addItemAny, _ := anypb.New(&cart_messages.AddItem{ItemId: 1, Quantity: 2})
removeItemAny, _ := anypb.New(&cart_messages.RemoveItem{Id: 1})
req := &control_plane_messages.ApplyRequest{
Id: 123,
Messages: []*anypb.Any{addItemAny, removeItemAny},
}
// Call Apply
resp, err := client.Apply(context.Background(), req)
if err != nil {
t.Fatalf("Apply failed: %v", err)
}
// Verify response
if resp.State == nil {
t.Errorf("expected State to be non-nil")
}
if len(resp.Mutations) != 2 {
t.Errorf("expected 2 mutation results, got %d", len(resp.Mutations))
}
for i, mut := range resp.Mutations {
if mut.Error != nil {
t.Errorf("expected no error in mutation %d, got %s", i, *mut.Error)
}
}
// Verify mutations were extracted and applied
if len(pool.applied) != 2 {
t.Errorf("expected 2 mutations applied, got %d", len(pool.applied))
}
if addItem, ok := pool.applied[0].(*cart_messages.AddItem); !ok || addItem.ItemId != 1 {
t.Errorf("expected AddItem with ItemId=1, got %v", pool.applied[0])
}
if removeItem, ok := pool.applied[1].(*cart_messages.RemoveItem); !ok || removeItem.Id != 1 {
t.Errorf("expected RemoveItem with Id=1, got %v", pool.applied[1])
}
}
func TestGetRequest(t *testing.T) {
// Setup mock pool
pool := &mockGrainPool{}
// Create gRPC server
server, err := NewControlServer[mockGrain](DefaultServerConfig(), pool)
if err != nil {
t.Fatalf("failed to create server: %v", err)
}
defer server.GracefulStop()
// Create client connection
conn, err := grpc.Dial("localhost:1337", grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer conn.Close()
client := control_plane_messages.NewControlPlaneClient(conn)
// Prepare GetRequest
req := &control_plane_messages.GetRequest{
Id: 123,
}
// Call Get
resp, err := client.Get(context.Background(), req)
if err != nil {
t.Fatalf("Get failed: %v", err)
}
// Verify response
if resp.Grain == nil {
t.Errorf("expected Grain to be non-nil")
}
}

View File

@@ -1,47 +0,0 @@
package actor
import (
"log"
"github.com/matst80/slask-finder/pkg/messaging"
amqp "github.com/rabbitmq/amqp091-go"
)
type LogListener interface {
AppendMutations(id uint64, msg ...ApplyResult)
}
type AmqpListener struct {
conn *amqp.Connection
transformer func(id uint64, msg []ApplyResult) (any, error)
}
func NewAmqpListener(conn *amqp.Connection, transformer func(id uint64, msg []ApplyResult) (any, error)) *AmqpListener {
return &AmqpListener{
conn: conn,
transformer: transformer,
}
}
func (l *AmqpListener) DefineTopics() {
ch, err := l.conn.Channel()
if err != nil {
log.Fatalf("Failed to open a channel: %v", err)
}
defer ch.Close()
if err := messaging.DefineTopic(ch, "cart", "mutation"); err != nil {
log.Fatalf("Failed to declare topic mutation: %v", err)
}
}
func (l *AmqpListener) AppendMutations(id uint64, msg ...ApplyResult) {
data, err := l.transformer(id, msg)
if err != nil {
log.Printf("Failed to transform mutation event: %v", err)
return
}
err = messaging.SendChange(l.conn, "cart", "mutation", data)
if err != nil {
log.Printf("Failed to send mutation event: %v", err)
}
}

View File

@@ -1,300 +0,0 @@
package actor
import (
"context"
"fmt"
"log"
"reflect"
"sync"
"go.opentelemetry.io/otel/attribute"
"google.golang.org/protobuf/proto"
)
type ApplyResult struct {
Type string `json:"type"`
Mutation proto.Message `json:"mutation"`
Error error `json:"error,omitempty"`
}
type MutationProcessor interface {
Process(ctx context.Context, grain any) error
}
type BasicMutationProcessor[V any] struct {
processor func(ctx context.Context, grain V) error
}
func NewMutationProcessor[V any](process func(ctx context.Context, grain V) error) MutationProcessor {
return &BasicMutationProcessor[V]{
processor: process,
}
}
func (p *BasicMutationProcessor[V]) Process(ctx context.Context, grain any) error {
return p.processor(ctx, grain.(V))
}
type MutationRegistry interface {
Apply(ctx context.Context, grain any, msg ...proto.Message) ([]ApplyResult, error)
RegisterMutations(handlers ...MutationHandler)
Create(typeName string) (proto.Message, bool)
GetTypeName(msg proto.Message) (string, bool)
RegisterProcessor(processor ...MutationProcessor)
//GetStorageEvent(msg proto.Message) StorageEvent
//FromStorageEvent(event StorageEvent) (proto.Message, error)
}
type ProtoMutationRegistry struct {
mutationRegistryMu sync.RWMutex
mutationRegistry map[reflect.Type]MutationHandler
processors []MutationProcessor
}
var (
ErrMutationNotRegistered = &MutationError{
Message: "mutation not registered",
Code: 255,
StatusCode: 500,
}
)
type MutationError struct {
Message string `json:"message"`
Code uint32 `json:"code"`
StatusCode uint32 `json:"status_code"`
}
func (m MutationError) Error() string {
return m.Message
}
// MutationOption configures additional behavior for a registered mutation.
type MutationOption func(*mutationOptions)
// mutationOptions holds flags adjustable per registration.
type mutationOptions struct {
updateTotals bool
}
// WithTotals ensures CartGrain.UpdateTotals() is called after a successful handler.
func WithTotals() MutationOption {
return func(o *mutationOptions) {
o.updateTotals = true
}
}
type MutationHandler interface {
Handle(state any, msg proto.Message) error
Name() string
Type() reflect.Type
Create() proto.Message
}
// RegisteredMutation stores metadata + the execution closure.
type RegisteredMutation[V any, T proto.Message] struct {
name string
handler func(*V, T) error
create func() proto.Message
msgType reflect.Type
}
func NewMutation[V any, T proto.Message](handler func(*V, T) error) *RegisteredMutation[V, T] {
// Derive the name and message type from a concrete instance produced by create().
// This avoids relying on reflect.TypeFor (which can yield unexpected results in some toolchains)
// and ensures we always peel off the pointer layer for proto messages.
create := func() proto.Message {
var t T
rt := reflect.TypeOf(t)
if rt != nil && rt.Kind() == reflect.Pointer {
return reflect.New(rt.Elem()).Interface().(proto.Message)
}
log.Fatalf("expected to create proto message got %+v", rt)
return nil
}
instance := create()
rt := reflect.TypeOf(instance)
if rt.Kind() == reflect.Pointer {
rt = rt.Elem()
}
return &RegisteredMutation[V, T]{
name: rt.Name(),
handler: handler,
create: create,
msgType: rt,
}
}
func (m *RegisteredMutation[V, T]) Handle(state any, msg proto.Message) error {
return m.handler(state.(*V), msg.(T))
}
func (m *RegisteredMutation[V, T]) Name() string {
return m.name
}
func (m *RegisteredMutation[V, T]) Create() proto.Message {
return m.create()
}
func (m *RegisteredMutation[V, T]) Type() reflect.Type {
return m.msgType
}
func NewMutationRegistry() MutationRegistry {
return &ProtoMutationRegistry{
mutationRegistry: make(map[reflect.Type]MutationHandler),
mutationRegistryMu: sync.RWMutex{},
processors: make([]MutationProcessor, 0),
}
}
func (r *ProtoMutationRegistry) RegisterProcessor(processors ...MutationProcessor) {
r.processors = append(r.processors, processors...)
}
func (r *ProtoMutationRegistry) RegisterMutations(handlers ...MutationHandler) {
r.mutationRegistryMu.Lock()
defer r.mutationRegistryMu.Unlock()
for _, handler := range handlers {
r.mutationRegistry[handler.Type()] = handler
}
}
func (r *ProtoMutationRegistry) GetTypeName(msg proto.Message) (string, bool) {
r.mutationRegistryMu.RLock()
defer r.mutationRegistryMu.RUnlock()
rt := indirectType(reflect.TypeOf(msg))
if handler, ok := r.mutationRegistry[rt]; ok {
return handler.Name(), true
}
return "", false
}
func (r *ProtoMutationRegistry) getHandler(typeName string) MutationHandler {
r.mutationRegistryMu.Lock()
defer r.mutationRegistryMu.Unlock()
for _, handler := range r.mutationRegistry {
if handler.Name() == typeName {
return handler
}
}
return nil
}
func (r *ProtoMutationRegistry) Create(typeName string) (proto.Message, bool) {
handler := r.getHandler(typeName)
if handler == nil {
log.Printf("missing handler for %s", typeName)
return nil, false
}
return handler.Create(), true
}
// ApplyRegistered attempts to apply a registered mutation.
// Returns updated grain if successful.
//
// If the mutation is not registered, returns (nil, ErrMutationNotRegistered).
func (r *ProtoMutationRegistry) Apply(ctx context.Context, grain any, msg ...proto.Message) ([]ApplyResult, error) {
parentCtx, span := tracer.Start(ctx, "apply mutations")
defer span.End()
span.SetAttributes(
attribute.String("component", "registry"),
attribute.Int("mutations", len(msg)),
)
results := make([]ApplyResult, 0, len(msg))
if grain == nil {
return results, fmt.Errorf("nil grain")
}
// Nil slice of mutations still treated as an error (call contract violation).
if msg == nil {
return results, fmt.Errorf("nil mutation message")
}
for _, m := range msg {
// Error if any mutation element is nil.
if m == nil {
return results, fmt.Errorf("nil mutation message")
}
// Typed nil: interface holds concrete proto message type whose pointer value is nil.
rv := reflect.ValueOf(m)
if rv.Kind() == reflect.Pointer && rv.IsNil() {
continue
}
rt := indirectType(reflect.TypeOf(m))
_, msgSpan := tracer.Start(parentCtx, rt.Name())
r.mutationRegistryMu.RLock()
entry, ok := r.mutationRegistry[rt]
r.mutationRegistryMu.RUnlock()
if !ok {
results = append(results, ApplyResult{Error: ErrMutationNotRegistered, Type: rt.Name(), Mutation: m})
continue
} else {
err := entry.Handle(grain, m)
if err != nil {
msgSpan.RecordError(err)
}
results = append(results, ApplyResult{Error: err, Type: rt.Name(), Mutation: m})
}
msgSpan.End()
}
if len(results) > 0 {
processCtx, processSpan := tracer.Start(ctx, "after mutation processors")
defer processSpan.End()
for _, processor := range r.processors {
err := processor.Process(processCtx, grain)
if err != nil {
return results, err
}
}
}
// Return error for unregistered mutations
for _, res := range results {
if res.Error == ErrMutationNotRegistered {
return results, res.Error
}
}
return results, nil
}
// RegisteredMutations returns metadata for all registered mutations (snapshot).
func (r *ProtoMutationRegistry) RegisteredMutations() []string {
r.mutationRegistryMu.RLock()
defer r.mutationRegistryMu.RUnlock()
out := make([]string, 0, len(r.mutationRegistry))
for _, entry := range r.mutationRegistry {
out = append(out, entry.Name())
}
return out
}
// RegisteredMutationTypes returns the reflect.Type list of all registered messages.
// Useful for coverage tests ensuring expected set matches actual set.
func (r *ProtoMutationRegistry) RegisteredMutationTypes() []reflect.Type {
r.mutationRegistryMu.RLock()
defer r.mutationRegistryMu.RUnlock()
out := make([]reflect.Type, 0, len(r.mutationRegistry))
for _, entry := range r.mutationRegistry {
out = append(out, entry.Type())
}
return out
}
func indirectType(t reflect.Type) reflect.Type {
for t.Kind() == reflect.Ptr {
t = t.Elem()
}
return t
}

View File

@@ -1,134 +0,0 @@
package actor
import (
"context"
"reflect"
"slices"
"testing"
cart_messages "git.k6n.net/go-cart-actor/proto/cart"
)
type cartState struct {
calls int
lastAdded *cart_messages.AddItem
}
func TestRegisteredMutationBasics(t *testing.T) {
reg := NewMutationRegistry().(*ProtoMutationRegistry)
addItemMutation := NewMutation(
func(state *cartState, msg *cart_messages.AddItem) error {
state.calls++
// copy to avoid external mutation side-effects (not strictly necessary for the test)
cp := msg
state.lastAdded = cp
return nil
},
)
// Sanity check on mutation metadata
if addItemMutation.Name() != "AddItem" {
t.Fatalf("expected mutation Name() == AddItem, got %s", addItemMutation.Name())
}
if got, want := addItemMutation.Type(), reflect.TypeOf(cart_messages.AddItem{}); got != want {
t.Fatalf("expected Type() == %v, got %v", want, got)
}
reg.RegisterMutations(addItemMutation)
// RegisteredMutations: membership (order not guaranteed)
names := reg.RegisteredMutations()
if !slices.Contains(names, "AddItem") {
t.Fatalf("RegisteredMutations missing AddItem, got %v", names)
}
// RegisteredMutationTypes: membership (order not guaranteed)
types := reg.RegisteredMutationTypes()
if !slices.Contains(types, reflect.TypeOf(cart_messages.AddItem{})) {
t.Fatalf("RegisteredMutationTypes missing AddItem type, got %v", types)
}
// GetTypeName should resolve for a pointer instance
name, ok := reg.GetTypeName(&cart_messages.AddItem{})
if !ok || name != "AddItem" {
t.Fatalf("GetTypeName returned (%q,%v), expected (AddItem,true)", name, ok)
}
// GetTypeName should fail for unregistered type
if name, ok := reg.GetTypeName(&cart_messages.RemoveItem{}); ok || name != "" {
t.Fatalf("expected GetTypeName to fail for unregistered message, got (%q,%v)", name, ok)
}
// Create by name
msg, ok := reg.Create("AddItem")
if !ok {
t.Fatalf("Create failed for registered mutation")
}
if _, isAddItem := msg.(*cart_messages.AddItem); !isAddItem {
t.Fatalf("Create returned wrong concrete type: %T", msg)
}
// Create unknown
if m2, ok := reg.Create("Unknown"); ok || m2 != nil {
t.Fatalf("Create should fail for unknown mutation, got (%T,%v)", m2, ok)
}
// Apply happy path
state := &cartState{}
add := &cart_messages.AddItem{ItemId: 42, Quantity: 3, Sku: "ABC"}
if _, err := reg.Apply(context.Background(), state, add); err != nil {
t.Fatalf("Apply returned error: %v", err)
}
if state.calls != 1 {
t.Fatalf("handler not invoked expected calls=1 got=%d", state.calls)
}
if state.lastAdded == nil || state.lastAdded.ItemId != 42 || state.lastAdded.Quantity != 3 {
t.Fatalf("state not updated correctly: %+v", state.lastAdded)
}
// Apply nil grain
if _, err := reg.Apply(context.Background(), nil, add); err == nil {
t.Fatalf("expected error for nil grain")
}
// Apply nil message
if _, err := reg.Apply(context.Background(), state, nil); err == nil {
t.Fatalf("expected error for nil mutation message")
}
// Apply unregistered message
_, err := reg.Apply(context.Background(), state, &cart_messages.RemoveItem{})
if err != ErrMutationNotRegistered {
t.Fatalf("expected ErrMutationNotRegistered, got %v", err)
}
}
// func TestConcurrentSafeRegistrationLookup(t *testing.T) {
// // This test is light-weight; it ensures locks don't deadlock under simple concurrent access.
// reg := NewMutationRegistry().(*ProtoMutationRegistry)
// mut := NewMutation[cartState, *messages.Noop](
// func(state *cartState, msg *messages.Noop) error { state.calls++; return nil },
// func() *messages.Noop { return &messages.Noop{} },
// )
// reg.RegisterMutations(mut)
// done := make(chan struct{})
// const workers = 25
// for i := 0; i < workers; i++ {
// go func() {
// for j := 0; j < 100; j++ {
// _, _ = reg.Create("Noop")
// _, _ = reg.GetTypeName(&messages.Noop{})
// _ = reg.Apply(&cartState{}, &messages.Noop{})
// }
// done <- struct{}{}
// }()
// }
// for i := 0; i < workers; i++ {
// <-done
// }
// }
// Helpers

View File

@@ -1,78 +0,0 @@
package actor
import (
"iter"
"slices"
"sync"
)
type ReceiverFunc[V any] func(event V)
type PubSub[V any] struct {
subscribers []*ReceiverFunc[V]
mu sync.RWMutex
}
// NewPubSub creates a new PubSub instance.
func NewPubSub[V any]() *PubSub[V] {
return &PubSub[V]{
subscribers: make([]*ReceiverFunc[V], 0),
}
}
// Subscribe adds a grain ID to the subscribers of a topic.
func (p *PubSub[V]) Subscribe(receiver ReceiverFunc[V]) {
if receiver == nil {
return
}
p.mu.Lock()
defer p.mu.Unlock()
// log.Printf("adding subscriber")
p.subscribers = append(p.subscribers, &receiver)
}
// Unsubscribe removes a grain ID from the subscribers of a topic.
func (p *PubSub[V]) Unsubscribe(receiver ReceiverFunc[V]) {
p.mu.Lock()
defer p.mu.Unlock()
list := p.subscribers
prt := &receiver
for i, sub := range list {
if sub == nil {
continue
}
if sub == prt {
// log.Printf("removing subscriber")
p.subscribers = append(list[:i], list[i+1:]...)
break
}
}
p.subscribers = slices.DeleteFunc(p.subscribers, func(fn *ReceiverFunc[V]) bool {
return fn == nil
})
// If list is empty, could delete, but not necessary
}
// GetSubscribers returns a copy of the subscriber IDs for a topic.
func (p *PubSub[V]) GetSubscribers() iter.Seq[ReceiverFunc[V]] {
p.mu.RLock()
defer p.mu.RUnlock()
return func(yield func(ReceiverFunc[V]) bool) {
for _, sub := range p.subscribers {
if sub == nil {
continue
}
if !yield(*sub) {
return
}
}
}
}
// Publish sends an event to all subscribers of the topic.
func (p *PubSub[V]) Publish(event V) {
for notify := range p.GetSubscribers() {
notify(event)
}
}

View File

@@ -1,462 +0,0 @@
package actor
import (
"context"
"fmt"
"log"
"maps"
"sync"
"time"
"google.golang.org/protobuf/proto"
)
type SimpleGrainPool[V any] struct {
// fields and methods
localMu sync.RWMutex
grains map[uint64]Grain[V]
mutationRegistry MutationRegistry
spawn func(ctx context.Context, id uint64) (Grain[V], error)
destroy func(grain Grain[V]) error
spawnHost func(host string) (Host[V], error)
listeners []LogListener
storage LogStorage[V]
ttl time.Duration
poolSize int
// Cluster coordination --------------------------------------------------
hostname string
remoteMu sync.RWMutex
remoteOwners map[uint64]Host[V]
remoteHosts map[string]Host[V]
//discardedHostHandler *DiscardedHostHandler
// House-keeping ---------------------------------------------------------
purgeTicker *time.Ticker
}
type GrainPoolConfig[V any] struct {
Hostname string
Spawn func(ctx context.Context, id uint64) (Grain[V], error)
SpawnHost func(host string) (Host[V], error)
Destroy func(grain Grain[V]) error
TTL time.Duration
PoolSize int
MutationRegistry MutationRegistry
Storage LogStorage[V]
}
func NewSimpleGrainPool[V any](config GrainPoolConfig[V]) (*SimpleGrainPool[V], error) {
p := &SimpleGrainPool[V]{
grains: make(map[uint64]Grain[V]),
mutationRegistry: config.MutationRegistry,
storage: config.Storage,
spawn: config.Spawn,
spawnHost: config.SpawnHost,
destroy: config.Destroy,
ttl: config.TTL,
poolSize: config.PoolSize,
hostname: config.Hostname,
remoteOwners: make(map[uint64]Host[V]),
remoteHosts: make(map[string]Host[V]),
}
p.purgeTicker = time.NewTicker(time.Minute)
go func() {
for range p.purgeTicker.C {
p.purge()
}
}()
return p, nil
}
func (p *SimpleGrainPool[V]) AddListener(listener LogListener) {
p.listeners = append(p.listeners, listener)
}
func (p *SimpleGrainPool[V]) RemoveListener(listener LogListener) {
for i, l := range p.listeners {
if l == listener {
p.listeners = append(p.listeners[:i], p.listeners[i+1:]...)
break
}
}
}
func (p *SimpleGrainPool[V]) purge() {
purgeLimit := time.Now().Add(-p.ttl)
purgedIds := make([]uint64, 0, len(p.grains))
p.localMu.Lock()
for id, grain := range p.grains {
if grain.GetLastAccess().Before(purgeLimit) {
purgedIds = append(purgedIds, id)
if err := p.destroy(grain); err != nil {
log.Printf("failed to destroy grain %d: %v", id, err)
}
delete(p.grains, id)
}
}
p.localMu.Unlock()
p.forAllHosts(func(remote Host[V]) {
remote.AnnounceExpiry(purgedIds)
})
}
// LocalUsage returns the number of resident grains and configured capacity.
func (p *SimpleGrainPool[V]) LocalUsage() (int, int) {
p.localMu.RLock()
defer p.localMu.RUnlock()
return len(p.grains), p.poolSize
}
// LocalCartIDs returns the currently owned cart ids (for control-plane RPCs).
func (p *SimpleGrainPool[V]) GetLocalIds() []uint64 {
p.localMu.RLock()
defer p.localMu.RUnlock()
ids := make([]uint64, 0, len(p.grains))
for _, g := range p.grains {
if g == nil {
continue
}
ids = append(ids, uint64(g.GetId()))
}
return ids
}
func (p *SimpleGrainPool[V]) HandleRemoteExpiry(host string, ids []uint64) error {
p.remoteMu.Lock()
defer p.remoteMu.Unlock()
for _, id := range ids {
delete(p.remoteOwners, id)
}
return nil
}
func (p *SimpleGrainPool[V]) HandleOwnershipChange(host string, ids []uint64) error {
p.remoteMu.RLock()
remoteHost, exists := p.remoteHosts[host]
p.remoteMu.RUnlock()
if !exists {
createdHost, err := p.AddRemote(host)
if err != nil {
return err
}
remoteHost = createdHost
}
p.remoteMu.Lock()
defer p.remoteMu.Unlock()
p.localMu.Lock()
defer p.localMu.Unlock()
for _, id := range ids {
log.Printf("Handling ownership change for cart %d to host %s", id, host)
delete(p.grains, id)
p.remoteOwners[id] = remoteHost
}
return nil
}
// TakeOwnership takes ownership of a grain.
func (p *SimpleGrainPool[V]) TakeOwnership(id uint64) {
p.broadcastOwnership([]uint64{id})
}
func (p *SimpleGrainPool[V]) AddRemoteHost(host string) {
p.AddRemote(host)
}
func (p *SimpleGrainPool[V]) AddRemote(host string) (Host[V], error) {
if host == "" {
return nil, fmt.Errorf("host is empty")
}
if host == p.hostname {
return nil, fmt.Errorf("same host, this should not happen")
}
p.remoteMu.RLock()
existing, found := p.remoteHosts[host]
p.remoteMu.RUnlock()
if found {
return existing, nil
}
remote, err := p.spawnHost(host)
if err != nil {
log.Printf("AddRemote %s failed: %v", host, err)
return nil, err
}
p.remoteMu.Lock()
p.remoteHosts[host] = remote
p.remoteMu.Unlock()
// connectedRemotes.Set(float64(p.RemoteCount()))
log.Printf("Connected to remote host %s", host)
go p.pingLoop(remote)
go p.initializeRemote(remote)
go p.SendNegotiation()
return remote, nil
}
func (p *SimpleGrainPool[V]) initializeRemote(remote Host[V]) {
remotesIds := remote.GetActorIds()
p.remoteMu.Lock()
for _, id := range remotesIds {
p.localMu.Lock()
delete(p.grains, id)
p.localMu.Unlock()
if _, exists := p.remoteOwners[id]; !exists {
p.remoteOwners[id] = remote
}
}
p.remoteMu.Unlock()
}
func (p *SimpleGrainPool[V]) RemoveHost(host string) {
p.remoteMu.Lock()
remote, exists := p.remoteHosts[host]
if exists {
go remote.Close()
delete(p.remoteHosts, host)
}
count := 0
for id, owner := range p.remoteOwners {
if owner.Name() == host {
count++
delete(p.remoteOwners, id)
}
}
log.Printf("Removing host %s, grains: %d", host, count)
p.remoteMu.Unlock()
if exists {
remote.Close()
}
// connectedRemotes.Set(float64(p.RemoteCount()))
}
func (p *SimpleGrainPool[V]) RemoteCount() int {
p.remoteMu.RLock()
defer p.remoteMu.RUnlock()
return len(p.remoteHosts)
}
// RemoteHostNames returns a snapshot of connected remote host identifiers.
func (p *SimpleGrainPool[V]) RemoteHostNames() []string {
p.remoteMu.RLock()
defer p.remoteMu.RUnlock()
hosts := make([]string, 0, len(p.remoteHosts))
for host := range p.remoteHosts {
hosts = append(hosts, host)
}
return hosts
}
func (p *SimpleGrainPool[V]) IsKnown(host string) bool {
if host == p.hostname {
return true
}
p.remoteMu.RLock()
defer p.remoteMu.RUnlock()
_, ok := p.remoteHosts[host]
return ok
}
func (p *SimpleGrainPool[V]) pingLoop(remote Host[V]) {
remote.Ping()
ticker := time.NewTicker(5 * time.Second)
defer ticker.Stop()
for range ticker.C {
if !remote.Ping() {
if !remote.IsHealthy() {
log.Printf("Remote %s unhealthy, removing", remote.Name())
p.Close()
p.RemoveHost(remote.Name())
return
}
continue
}
}
}
func (p *SimpleGrainPool[V]) IsHealthy() bool {
p.remoteMu.RLock()
defer p.remoteMu.RUnlock()
for _, r := range p.remoteHosts {
if !r.IsHealthy() {
return false
}
}
return true
}
func (p *SimpleGrainPool[V]) Negotiate(otherHosts []string) {
for _, host := range otherHosts {
if host != p.hostname {
p.remoteMu.RLock()
_, ok := p.remoteHosts[host]
p.remoteMu.RUnlock()
if !ok {
go p.AddRemote(host)
}
}
}
}
func (p *SimpleGrainPool[V]) SendNegotiation() {
//negotiationCount.Inc()
p.remoteMu.RLock()
hosts := make([]string, 0, len(p.remoteHosts)+1)
hosts = append(hosts, p.hostname)
remotes := make([]Host[V], 0, len(p.remoteHosts))
for h, r := range p.remoteHosts {
hosts = append(hosts, h)
remotes = append(remotes, r)
}
p.remoteMu.RUnlock()
p.forAllHosts(func(remote Host[V]) {
knownByRemote, err := remote.Negotiate(hosts)
if err != nil {
log.Printf("Negotiate with %s failed: %v", remote.Name(), err)
return
}
for _, h := range knownByRemote {
if !p.IsKnown(h) {
go p.AddRemote(h)
}
}
})
}
func (p *SimpleGrainPool[V]) forAllHosts(fn func(Host[V])) {
p.remoteMu.RLock()
rh := maps.Clone(p.remoteHosts)
p.remoteMu.RUnlock()
wg := sync.WaitGroup{}
for _, host := range rh {
wg.Go(func() { fn(host) })
}
for name, host := range rh {
if !host.IsHealthy() {
host.Close()
p.remoteMu.Lock()
delete(p.remoteHosts, name)
p.remoteMu.Unlock()
}
}
}
func (p *SimpleGrainPool[V]) broadcastOwnership(ids []uint64) {
if len(ids) == 0 {
return
}
p.forAllHosts(func(rh Host[V]) {
rh.AnnounceOwnership(p.hostname, ids)
})
log.Printf("%s taking ownership of %d ids", p.hostname, len(ids))
// go p.statsUpdate()
}
func (p *SimpleGrainPool[V]) getOrClaimGrain(ctx context.Context, id uint64) (Grain[V], error) {
p.localMu.RLock()
grain, exists := p.grains[id]
p.localMu.RUnlock()
if exists && grain != nil {
return grain, nil
}
grain, err := p.spawn(ctx, id)
if err != nil {
return nil, err
}
go p.broadcastOwnership([]uint64{id})
p.localMu.Lock()
p.grains[id] = grain
p.localMu.Unlock()
return grain, nil
}
// // ErrNotOwner is returned when a cart belongs to another host.
// var ErrNotOwner = fmt.Errorf("not owner")
// Apply applies a mutation to a grain.
func (p *SimpleGrainPool[V]) Apply(ctx context.Context, id uint64, mutation ...proto.Message) (*MutationResult[V], error) {
grain, err := p.getOrClaimGrain(ctx, id)
if err != nil {
return nil, err
}
mutations, err := p.mutationRegistry.Apply(ctx, grain, mutation...)
if err != nil {
return nil, err
}
if p.storage != nil {
go func() {
if err := p.storage.AppendMutations(id, mutation...); err != nil {
log.Printf("failed to store mutation for grain %d: %v", id, err)
}
}()
}
for _, listener := range p.listeners {
go listener.AppendMutations(id, mutations...)
}
result, err := grain.GetCurrentState()
if err != nil {
return nil, err
}
return &MutationResult[V]{
Result: *result,
Mutations: mutations,
}, nil
}
// Get returns the current state of a grain.
func (p *SimpleGrainPool[V]) Get(ctx context.Context, id uint64) (*V, error) {
grain, err := p.getOrClaimGrain(ctx, id)
if err != nil {
return nil, err
}
return grain.GetCurrentState()
}
// OwnerHost reports the remote owner (if any) for the supplied cart id.
func (p *SimpleGrainPool[V]) OwnerHost(id uint64) (Host[V], bool) {
p.remoteMu.RLock()
defer p.remoteMu.RUnlock()
owner, ok := p.remoteOwners[id]
return owner, ok
}
// Hostname returns the local hostname (pod IP).
func (p *SimpleGrainPool[V]) Hostname() string {
return p.hostname
}
// Close notifies remotes that this host is shutting down.
func (p *SimpleGrainPool[V]) Close() {
p.forAllHosts(func(rh Host[V]) {
rh.Close()
})
if p.purgeTicker != nil {
p.purgeTicker.Stop()
}
}

View File

@@ -1,98 +0,0 @@
package actor
import (
"bufio"
"encoding/json"
"errors"
"io"
"time"
"google.golang.org/protobuf/proto"
)
type StateStorage struct {
registry MutationRegistry
}
type StorageEvent struct {
Type string `json:"type"`
TimeStamp time.Time `json:"timestamp"`
Mutation proto.Message `json:"mutation"`
}
type rawEvent struct {
Type string `json:"type"`
TimeStamp time.Time `json:"timestamp"`
Mutation json.RawMessage `json:"mutation"`
}
func NewState(registry MutationRegistry) *StateStorage {
return &StateStorage{
registry: registry,
}
}
var ErrUnknownType = errors.New("unknown type")
func (s *StateStorage) Load(r io.Reader, onMessage func(msg proto.Message, timeStamp time.Time)) error {
var err error
var evt *StorageEvent
scanner := bufio.NewScanner(r)
for err == nil {
evt, err = s.Read(scanner)
if err == nil {
onMessage(evt.Mutation, evt.TimeStamp)
}
}
if err == io.EOF {
return nil
}
return err
}
func (s *StateStorage) Append(io io.Writer, mutation proto.Message, timeStamp time.Time) error {
typeName, ok := s.registry.GetTypeName(mutation)
if !ok {
return ErrUnknownType
}
event := &StorageEvent{
Type: typeName,
TimeStamp: timeStamp,
Mutation: mutation,
}
jsonBytes, err := json.Marshal(event)
if err != nil {
return err
}
if _, err := io.Write(jsonBytes); err != nil {
return err
}
io.Write([]byte("\n"))
return nil
}
func (s *StateStorage) Read(r *bufio.Scanner) (*StorageEvent, error) {
var event rawEvent
if r.Scan() {
b := r.Bytes()
err := json.Unmarshal(b, &event)
if err != nil {
return nil, err
}
typeName := event.Type
mutation, ok := s.registry.Create(typeName)
if !ok {
return nil, ErrUnknownType
}
if err := json.Unmarshal(event.Mutation, mutation); err != nil {
return nil, err
}
return &StorageEvent{
Type: typeName,
TimeStamp: event.TimeStamp,
Mutation: mutation,
}, r.Err()
}
return nil, io.EOF
}

View File

@@ -1,276 +0,0 @@
package cart
import (
"encoding/json"
"sync"
"time"
"git.k6n.net/go-cart-actor/pkg/voucher"
"github.com/matst80/go-redis-inventory/pkg/inventory"
)
// Legacy padded [16]byte CartId and its helper methods removed.
// Unified CartId (uint64 with base62 string form) now defined in cart_id.go.
type StockStatus int
type ItemMeta struct {
Name string `json:"name"`
Brand string `json:"brand,omitempty"`
Category string `json:"category,omitempty"`
Category2 string `json:"category2,omitempty"`
Category3 string `json:"category3,omitempty"`
Category4 string `json:"category4,omitempty"`
Category5 string `json:"category5,omitempty"`
SellerName string `json:"sellerName,omitempty"`
Image string `json:"image,omitempty"`
Outlet *string `json:"outlet,omitempty"`
}
type CartItem struct {
Id uint32 `json:"id"`
ItemId uint32 `json:"itemId,omitempty"`
ParentId *uint32 `json:"parentId,omitempty"`
Sku string `json:"sku"`
Price Price `json:"price"`
TotalPrice Price `json:"totalPrice"`
SellerId string `json:"sellerId,omitempty"`
OrgPrice *Price `json:"orgPrice,omitempty"`
Cgm string `json:"cgm,omitempty"`
Tax int
Stock uint16 `json:"stock"`
Quantity uint16 `json:"qty"`
Discount *Price `json:"discount,omitempty"`
Disclaimer string `json:"disclaimer,omitempty"`
ArticleType string `json:"type,omitempty"`
StoreId *string `json:"storeId,omitempty"`
Meta *ItemMeta `json:"meta,omitempty"`
SaleStatus string `json:"saleStatus"`
Marking *Marking `json:"marking,omitempty"`
SubscriptionDetailsId string `json:"subscriptionDetailsId,omitempty"`
OrderReference string `json:"orderReference,omitempty"`
IsSubscribed bool `json:"isSubscribed,omitempty"`
ReservationEndTime *time.Time `json:"reservationEndTime,omitempty"`
}
type CartNotification struct {
LinkedId int `json:"id"`
Provider string `json:"provider"`
Title string `json:"title"`
Content string `json:"content"`
}
type SubscriptionDetails struct {
Id string `json:"id,omitempty"`
Version uint16 `json:"version"`
OfferingCode string `json:"offeringCode,omitempty"`
SigningType string `json:"signingType,omitempty"`
Meta json.RawMessage `json:"data,omitempty"`
}
type Notice struct {
Timestamp time.Time `json:"timestamp"`
Message string `json:"message"`
Code *string `json:"code,omitempty"`
}
type CartPaymentStatus string
const (
CartPaymentStatusPending CartPaymentStatus = "pending"
CartPaymentStatusFailed CartPaymentStatus = "failed"
CartPaymentStatusSuccess CartPaymentStatus = "success"
CartPaymentStatusCancelled CartPaymentStatus = "partial"
)
type Marking struct {
Type uint32 `json:"type"`
Text string `json:"text"`
}
type CartGrain struct {
mu sync.RWMutex
lastItemId uint32
lastVoucherId uint32
lastAccess time.Time
lastChange time.Time // unix seconds of last successful mutation (replay sets from event ts)
userId string
Currency string `json:"currency"`
Language string `json:"language"`
Version uint `json:"version"`
InventoryReserved bool `json:"inventoryReserved"`
Id CartId `json:"id"`
Items []*CartItem `json:"items"`
TotalPrice *Price `json:"totalPrice"`
TotalDiscount *Price `json:"totalDiscount"`
Processing bool `json:"processing"`
//PaymentInProgress uint16 `json:"paymentInProgress"`
OrderReference string `json:"orderReference,omitempty"`
Vouchers []*Voucher `json:"vouchers,omitempty"`
Notifications []CartNotification `json:"cartNotification,omitempty"`
SubscriptionDetails map[string]*SubscriptionDetails `json:"subscriptionDetails,omitempty"`
//CheckoutOrderId string `json:"checkoutOrderId,omitempty"`
CheckoutStatus *CartPaymentStatus `json:"checkoutStatus,omitempty"`
//CheckoutCountry string `json:"checkoutCountry,omitempty"`
}
type Voucher struct {
Code string `json:"code"`
Applied bool `json:"applied"`
Rules []string `json:"rules"`
Description string `json:"description,omitempty"`
Id uint32 `json:"id"`
Value int64 `json:"value"`
}
func (v *Voucher) AppliesTo(cart *CartGrain) ([]*CartItem, bool) {
// No rules -> applies to entire cart
if len(v.Rules) == 0 {
return cart.Items, true
}
// Build evaluation context once
ctx := voucher.EvalContext{
Items: make([]voucher.Item, 0, len(cart.Items)),
CartTotalInc: 0,
}
if cart.TotalPrice != nil {
ctx.CartTotalInc = cart.TotalPrice.IncVat
}
for _, it := range cart.Items {
category := ""
if it.Meta != nil {
category = it.Meta.Category
}
ctx.Items = append(ctx.Items, voucher.Item{
Sku: it.Sku,
Category: category,
UnitPrice: it.Price.IncVat,
})
}
// All voucher rules must pass (logical AND)
for _, expr := range v.Rules {
if expr == "" {
// Empty condition treated as pass (acts like a comment / placeholder)
continue
}
rs, err := voucher.ParseRules(expr)
if err != nil {
// Fail closed on parse error
return nil, false
}
if !rs.Applies(ctx) {
return nil, false
}
}
return cart.Items, true
}
func NewCartGrain(id uint64, ts time.Time) *CartGrain {
return &CartGrain{
lastItemId: 0,
lastVoucherId: 0,
lastAccess: ts,
lastChange: ts,
TotalDiscount: NewPrice(),
Vouchers: []*Voucher{},
Id: CartId(id),
Items: []*CartItem{},
TotalPrice: NewPrice(),
SubscriptionDetails: make(map[string]*SubscriptionDetails),
}
}
func (c *CartGrain) GetId() uint64 {
return uint64(c.Id)
}
func (c *CartGrain) GetLastChange() time.Time {
return c.lastChange
}
func (c *CartGrain) GetLastAccess() time.Time {
return c.lastAccess
}
func (c *CartGrain) GetCurrentState() (*CartGrain, error) {
c.lastAccess = time.Now()
return c, nil
}
func (c *CartGrain) HandleInventoryChange(change inventory.InventoryChange) {
for _, item := range c.Items {
l := "se"
if item.StoreId != nil {
l = *item.StoreId
}
if item.Sku == change.SKU && change.StockLocationID == l {
item.Stock = uint16(change.Value)
break
}
}
}
func (c *CartGrain) GetState() ([]byte, error) {
return json.Marshal(c)
}
func (c *CartGrain) FindItemWithSku(sku string) (*CartItem, bool) {
c.mu.RLock()
defer c.mu.RUnlock()
for _, item := range c.Items {
if item.Sku == sku {
return item, true
}
}
return nil, false
}
func (c *CartGrain) UpdateTotals() {
c.TotalPrice = NewPrice()
c.TotalDiscount = NewPrice()
for _, item := range c.Items {
rowTotal := MultiplyPrice(item.Price, int64(item.Quantity))
if item.OrgPrice != nil {
diff := NewPrice()
diff.Add(*item.OrgPrice)
diff.Subtract(item.Price)
diff.Multiply(int64(item.Quantity))
//rowTotal.Subtract(*diff)
item.Discount = diff
if diff.IncVat > 0 {
c.TotalDiscount.Add(*diff)
}
}
item.TotalPrice = *rowTotal
c.TotalPrice.Add(*rowTotal)
}
for _, voucher := range c.Vouchers {
_, ok := voucher.AppliesTo(c)
voucher.Applied = false
if ok {
value := NewPriceFromIncVat(voucher.Value, 25)
if c.TotalPrice.IncVat <= value.IncVat {
// don't apply discounts to more than the total price
continue
}
voucher.Applied = true
c.TotalDiscount.Add(*value)
c.TotalPrice.Subtract(*value)
}
}
}

View File

@@ -1,87 +0,0 @@
package cart
import (
"context"
"time"
"git.k6n.net/go-cart-actor/pkg/actor"
"github.com/matst80/go-redis-inventory/pkg/inventory"
)
type CartMutationContext struct {
reservationService inventory.CartReservationService
}
func NewCartMutationContext(reservationService inventory.CartReservationService) *CartMutationContext {
return &CartMutationContext{
reservationService: reservationService,
}
}
func (c *CartMutationContext) ReserveItem(ctx context.Context, cartId CartId, sku string, locationId *string, quantity uint16) (*time.Time, error) {
if quantity <= 0 || c.reservationService == nil {
return nil, nil
}
l := inventory.LocationID("se")
if locationId != nil {
l = inventory.LocationID(*locationId)
}
ttl := time.Minute * 15
endTime := time.Now().Add(ttl)
err := c.reservationService.ReserveForCart(ctx, inventory.CartReserveRequest{
CartID: inventory.CartID(cartId.String()),
InventoryReference: &inventory.InventoryReference{
SKU: inventory.SKU(sku),
LocationID: l,
},
TTL: ttl,
Quantity: uint32(quantity),
})
if err != nil {
return nil, err
}
return &endTime, nil
}
func (c *CartMutationContext) UseReservations(item *CartItem) bool {
if item.ReservationEndTime != nil {
return true
}
return item.Cgm == "55010"
}
func (c *CartMutationContext) ReleaseItem(ctx context.Context, cartId CartId, sku string, locationId *string) error {
if c.reservationService == nil {
return nil
}
l := inventory.LocationID("se")
if locationId != nil {
l = inventory.LocationID(*locationId)
}
return c.reservationService.ReleaseForCart(ctx, inventory.SKU(sku), l, inventory.CartID(cartId.String()))
}
func NewCartMultationRegistry(context *CartMutationContext) actor.MutationRegistry {
reg := actor.NewMutationRegistry()
reg.RegisterMutations(
actor.NewMutation(context.AddItem),
actor.NewMutation(context.ChangeQuantity),
actor.NewMutation(context.RemoveItem),
actor.NewMutation(ClearCart),
actor.NewMutation(AddVoucher),
actor.NewMutation(RemoveVoucher),
actor.NewMutation(UpsertSubscriptionDetails),
actor.NewMutation(SetUserId),
actor.NewMutation(LineItemMarking),
actor.NewMutation(RemoveLineItemMarking),
actor.NewMutation(SubscriptionAdded),
// actor.NewMutation(SubscriptionRemoved),
)
return reg
}

View File

@@ -1,161 +0,0 @@
package cart
import (
"crypto/rand"
"encoding/json"
"fmt"
"git.k6n.net/go-cart-actor/pkg/actor"
)
// cart_id.go
//
// Breaking change:
// Unified cart identifier as a raw 64-bit unsigned integer (type CartId uint64).
// External textual representation: base62 (0-9 A-Z a-z), shortest possible
// encoding for 64 bits (max 11 characters, since 62^11 > 2^64).
//
// Rationale:
// - Replaces legacy fixed [16]byte padded string and transitional CartID wrapper.
// - Provides compact, URL/cookie-friendly identifiers.
// - O(1) hashing and minimal memory footprint.
// - 64 bits of crypto randomness => negligible collision probability at realistic scale.
//
// Public API:
// type CartId uint64
// func NewCartId() (CartId, error)
// func MustNewCartId() CartId
// func ParseCartId(string) (CartId, bool)
// func MustParseCartId(string) CartId
// (CartId).String() string
// (CartId).MarshalJSON() / UnmarshalJSON()
//
// NOTE:
// All legacy helpers (UpgradeLegacyCartId, Fallback hashing, Canonicalize variants,
// CartIDToLegacy, LegacyToCartID) have been removed as part of the breaking change.
//
// ---------------------------------------------------------------------------
type CartId actor.GrainId
const base62Alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
// Reverse lookup (0xFF marks invalid)
var base62Rev [256]byte
func init() {
for i := range base62Rev {
base62Rev[i] = 0xFF
}
for i := 0; i < len(base62Alphabet); i++ {
base62Rev[base62Alphabet[i]] = byte(i)
}
}
// String returns the canonical base62 encoding of the 64-bit id.
func (id CartId) String() string {
return encodeBase62(uint64(id))
}
// MarshalJSON encodes the cart id as a JSON string.
func (id CartId) MarshalJSON() ([]byte, error) {
return json.Marshal(id.String())
}
// UnmarshalJSON decodes a cart id from a JSON string containing base62 text.
func (id *CartId) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
parsed, ok := ParseCartId(s)
if !ok {
return fmt.Errorf("invalid cart id: %q", s)
}
*id = parsed
return nil
}
// NewCartId generates a new cryptographically random non-zero 64-bit id.
func NewCartId() (CartId, error) {
var b [8]byte
if _, err := rand.Read(b[:]); err != nil {
return 0, fmt.Errorf("NewCartId: %w", err)
}
u := (uint64(b[0]) << 56) |
(uint64(b[1]) << 48) |
(uint64(b[2]) << 40) |
(uint64(b[3]) << 32) |
(uint64(b[4]) << 24) |
(uint64(b[5]) << 16) |
(uint64(b[6]) << 8) |
uint64(b[7])
if u == 0 {
// Extremely unlikely; regenerate once to avoid "0" identifier if desired.
return NewCartId()
}
return CartId(u), nil
}
// MustNewCartId panics if generation fails.
func MustNewCartId() CartId {
id, err := NewCartId()
if err != nil {
panic(err)
}
return id
}
// ParseCartId parses a base62 string into a CartId.
// Returns (0,false) for invalid input.
func ParseCartId(s string) (CartId, bool) {
// Accept length 1..11 (11 sufficient for 64 bits). Reject >11 immediately.
// Provide a slightly looser upper bound (<=16) only if you anticipate future
// extensions; here we stay strict.
if len(s) == 0 || len(s) > 11 {
return 0, false
}
u, ok := decodeBase62(s)
if !ok {
return 0, false
}
return CartId(u), true
}
// MustParseCartId panics on invalid base62 input.
func MustParseCartId(s string) CartId {
id, ok := ParseCartId(s)
if !ok {
panic(fmt.Sprintf("invalid cart id: %q", s))
}
return id
}
// encodeBase62 converts a uint64 to base62 (shortest form).
func encodeBase62(u uint64) string {
if u == 0 {
return "0"
}
var buf [11]byte
i := len(buf)
for u > 0 {
i--
buf[i] = base62Alphabet[u%62]
u /= 62
}
return string(buf[i:])
}
// decodeBase62 converts base62 text to uint64.
func decodeBase62(s string) (uint64, bool) {
var v uint64
for i := 0; i < len(s); i++ {
c := s[i]
d := base62Rev[c]
if d == 0xFF {
return 0, false
}
v = v*62 + uint64(d)
}
return v, true
}

View File

@@ -1,185 +0,0 @@
package cart
import (
"encoding/json"
"fmt"
"testing"
)
// TestNewCartIdUniqueness generates many ids and checks for collisions.
func TestNewCartIdUniqueness(t *testing.T) {
const n = 20000
seen := make(map[string]struct{}, n)
for i := 0; i < n; i++ {
id, err := NewCartId()
if err != nil {
t.Fatalf("NewCartId error: %v", err)
}
s := id.String()
if _, exists := seen[s]; exists {
t.Fatalf("duplicate id encountered: %s", s)
}
seen[s] = struct{}{}
if s == "" {
t.Fatalf("empty string representation for id %d", id)
}
if len(s) > 11 {
t.Fatalf("encoded id length exceeds 11 chars: %s (%d)", s, len(s))
}
if id == 0 {
// We force regeneration on zero, extremely unlikely but test guards intent.
t.Fatalf("zero id generated (should be regenerated)")
}
}
}
// TestParseCartIdRoundTrip ensures parse -> string -> parse is stable.
func TestParseCartIdRoundTrip(t *testing.T) {
id := MustNewCartId()
txt := id.String()
parsed, ok := ParseCartId(txt)
if !ok {
t.Fatalf("ParseCartId failed for valid text %q", txt)
}
if parsed != id {
t.Fatalf("round trip mismatch: original=%d parsed=%d txt=%s", id, parsed, txt)
}
}
// TestParseCartIdInvalid covers invalid inputs.
func TestParseCartIdInvalid(t *testing.T) {
invalid := []string{
"", // empty
" ", // space
"01234567890abc", // >11 chars
"!!!!", // invalid chars
"-underscore-", // invalid chars
"abc_def", // underscore invalid for base62
"0123456789ABCD", // 14 chars
}
for _, s := range invalid {
if _, ok := ParseCartId(s); ok {
t.Fatalf("expected parse failure for %q", s)
}
}
}
// TestMustParseCartIdPanics verifies panic behavior for invalid input.
func TestMustParseCartIdPanics(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Fatalf("expected panic for invalid MustParseCartId input")
}
}()
_ = MustParseCartId("not*base62")
}
// TestJSONMarshalUnmarshalCartId verifies JSON round trip.
func TestJSONMarshalUnmarshalCartId(t *testing.T) {
id := MustNewCartId()
data, err := json.Marshal(struct {
Cart CartId `json:"cart"`
}{Cart: id})
if err != nil {
t.Fatalf("marshal error: %v", err)
}
var out struct {
Cart CartId `json:"cart"`
}
if err := json.Unmarshal(data, &out); err != nil {
t.Fatalf("unmarshal error: %v", err)
}
if out.Cart != id {
t.Fatalf("JSON round trip mismatch: have %d got %d", id, out.Cart)
}
}
// TestBase62LengthBound checks worst-case length (near max uint64).
func TestBase62LengthBound(t *testing.T) {
// Largest uint64
const maxU64 = ^uint64(0)
s := encodeBase62(maxU64)
if len(s) > 11 {
t.Fatalf("max uint64 encoded length > 11: %d (%s)", len(s), s)
}
dec, ok := decodeBase62(s)
if !ok || dec != maxU64 {
t.Fatalf("decode failed for max uint64: ok=%v dec=%d want=%d", ok, dec, maxU64)
}
}
// TestZeroEncoding ensures zero value encodes to "0" and parses back.
func TestZeroEncoding(t *testing.T) {
if s := encodeBase62(0); s != "0" {
t.Fatalf("encodeBase62(0) expected '0', got %q", s)
}
v, ok := decodeBase62("0")
if !ok || v != 0 {
t.Fatalf("decodeBase62('0') failed: ok=%v v=%d", ok, v)
}
if _, ok := ParseCartId("0"); !ok {
t.Fatalf("ParseCartId(\"0\") should succeed")
}
}
// TestSequentialParse ensures sequentially generated ids parse correctly.
func TestSequentialParse(t *testing.T) {
for i := 0; i < 1000; i++ {
id := MustNewCartId()
txt := id.String()
parsed, ok := ParseCartId(txt)
if !ok || parsed != id {
t.Fatalf("sequential parse mismatch: idx=%d orig=%d parsed=%d txt=%s", i, id, parsed, txt)
}
}
}
// BenchmarkNewCartId measures generation performance.
func BenchmarkNewCartId(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := NewCartId(); err != nil {
b.Fatalf("NewCartId error: %v", err)
}
}
}
// BenchmarkEncodeBase62 measures encoding performance.
func BenchmarkEncodeBase62(b *testing.B) {
// Precompute sample values
samples := make([]uint64, 1024)
for i := range samples {
// Spread bits without crypto randomness overhead
samples[i] = (uint64(i) << 53) ^ (uint64(i) * 0x9E3779B185EBCA87)
}
b.ResetTimer()
var sink string
for i := 0; i < b.N; i++ {
sink = encodeBase62(samples[i%len(samples)])
}
_ = sink
}
// BenchmarkDecodeBase62 measures decoding performance.
func BenchmarkDecodeBase62(b *testing.B) {
encoded := make([]string, 1024)
for i := range encoded {
encoded[i] = encodeBase62((uint64(i) << 32) | uint64(i))
}
b.ResetTimer()
var sum uint64
for i := 0; i < b.N; i++ {
v, ok := decodeBase62(encoded[i%len(encoded)])
if !ok {
b.Fatalf("decode failure for %s", encoded[i%len(encoded)])
}
sum ^= v
}
_ = sum
}
// ExampleCartIdString documents usage of CartId string form.
func ExampleCartId_string() {
id := MustNewCartId()
fmt.Println(len(id.String()) <= 11) // outputs true
// Output: true
}

View File

@@ -1,141 +0,0 @@
package cart
import (
"context"
"errors"
"fmt"
"log"
"time"
cart_messages "git.k6n.net/go-cart-actor/proto/cart"
"google.golang.org/protobuf/types/known/timestamppb"
)
// mutation_add_item.go
//
// Registers the AddItem cart mutation in the generic mutation registry.
// This replaces the legacy switch-based logic previously found in CartGrain.Apply.
//
// Behavior:
// - Validates quantity > 0
// - If an item with same SKU exists -> increases quantity
// - Else creates a new CartItem with computed tax amounts
// - Totals recalculated automatically via WithTotals()
//
// NOTE: Any future field additions in messages.AddItem that affect pricing / tax
// must keep this handler in sync.
var ErrPaymentInProgress = errors.New("payment in progress")
func (c *CartMutationContext) AddItem(g *CartGrain, m *cart_messages.AddItem) error {
ctx := context.Background()
if m == nil {
return fmt.Errorf("AddItem: nil payload")
}
if m.Quantity < 1 {
return fmt.Errorf("AddItem: invalid quantity %d", m.Quantity)
}
// Merge with any existing item having same SKU and matching StoreId (including both nil).
for _, existing := range g.Items {
if existing.Sku != m.Sku {
continue
}
sameStore := (existing.StoreId == nil && m.StoreId == nil) ||
(existing.StoreId != nil && m.StoreId != nil && *existing.StoreId == *m.StoreId)
if !sameStore {
continue
}
if c.UseReservations(existing) {
if err := c.ReleaseItem(ctx, g.Id, existing.Sku, existing.StoreId); err != nil {
log.Printf("failed to release item %d: %v", existing.Id, err)
}
endTime, err := c.ReserveItem(ctx, g.Id, existing.Sku, existing.StoreId, existing.Quantity+uint16(m.Quantity))
if err != nil {
return err
}
existing.ReservationEndTime = endTime
}
existing.Quantity += uint16(m.Quantity)
existing.Stock = uint16(m.Stock)
// If existing had nil store but new has one, adopt it.
if existing.StoreId == nil && m.StoreId != nil {
existing.StoreId = m.StoreId
}
return nil
}
g.mu.Lock()
defer g.mu.Unlock()
g.lastItemId++
taxRate := float32(25.0)
if m.Tax > 0 {
taxRate = float32(int(m.Tax) / 100)
}
pricePerItem := NewPriceFromIncVat(m.Price, taxRate)
needsReservation := true
if m.ReservationEndTime != nil {
needsReservation = m.ReservationEndTime.AsTime().Before(time.Now())
}
cartItem := &CartItem{
Id: g.lastItemId,
ItemId: uint32(m.ItemId),
Quantity: uint16(m.Quantity),
Sku: m.Sku,
Tax: int(taxRate * 100),
Meta: &ItemMeta{
Name: m.Name,
Image: m.Image,
Brand: m.Brand,
Category: m.Category,
Category2: m.Category2,
Category3: m.Category3,
Category4: m.Category4,
Category5: m.Category5,
Outlet: m.Outlet,
SellerName: m.SellerName,
},
SellerId: m.SellerId,
Cgm: m.Cgm,
SaleStatus: m.SaleStatus,
ParentId: m.ParentId,
Price: *pricePerItem,
TotalPrice: *MultiplyPrice(*pricePerItem, int64(m.Quantity)),
Stock: uint16(m.Stock),
Disclaimer: m.Disclaimer,
OrgPrice: getOrgPrice(m.OrgPrice, taxRate),
ArticleType: m.ArticleType,
StoreId: m.StoreId,
}
if needsReservation && c.UseReservations(cartItem) {
endTime, err := c.ReserveItem(ctx, g.Id, m.Sku, m.StoreId, uint16(m.Quantity))
if err != nil {
return err
}
if endTime != nil {
m.ReservationEndTime = timestamppb.New(*endTime)
t := m.ReservationEndTime.AsTime()
cartItem.ReservationEndTime = &t
}
}
g.Items = append(g.Items, cartItem)
g.UpdateTotals()
return nil
}
func getOrgPrice(orgPrice int64, taxRate float32) *Price {
if orgPrice <= 0 {
return nil
}
return NewPriceFromIncVat(orgPrice, taxRate)
}

View File

@@ -1,69 +0,0 @@
package cart
import (
"slices"
"git.k6n.net/go-cart-actor/pkg/actor"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
func RemoveVoucher(g *CartGrain, m *messages.RemoveVoucher) error {
if m == nil {
return &actor.MutationError{
Message: "RemoveVoucher: nil payload",
Code: 1003,
StatusCode: 400,
}
}
if g.CheckoutStatus != nil {
return ErrPaymentInProgress
}
if !slices.ContainsFunc(g.Vouchers, func(v *Voucher) bool {
return v.Id == m.Id
}) {
return &actor.MutationError{
Message: "voucher not applied",
Code: 1004,
StatusCode: 400,
}
}
g.Vouchers = slices.DeleteFunc(g.Vouchers, func(v *Voucher) bool {
return v.Id == m.Id
})
g.UpdateTotals()
return nil
}
func AddVoucher(g *CartGrain, m *messages.AddVoucher) error {
if m == nil {
return &actor.MutationError{
Message: "AddVoucher: nil payload",
Code: 1001,
StatusCode: 400,
}
}
if slices.ContainsFunc(g.Vouchers, func(v *Voucher) bool {
return v.Code == m.Code
}) {
return &actor.MutationError{
Message: "voucher already applied",
Code: 1002,
StatusCode: 400,
}
}
g.lastVoucherId++
g.Vouchers = append(g.Vouchers, &Voucher{
Id: g.lastVoucherId,
Applied: false,
Description: m.Description,
Code: m.Code,
Rules: m.VoucherRules,
Value: m.Value,
})
g.UpdateTotals()
return nil
}

View File

@@ -1,85 +0,0 @@
package cart
import (
"context"
"fmt"
"log"
"time"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
// mutation_change_quantity.go
//
// Registers the ChangeQuantity mutation.
//
// Behavior:
// - Locates an item by its cart-local line item Id (not source item_id).
// - If requested quantity <= 0 the line is removed.
// - Otherwise the line's Quantity field is updated.
// - Totals are recalculated (WithTotals).
//
// Error handling:
// - Returns an error if the item Id is not found.
// - Returns an error if payload is nil (defensive).
//
// Concurrency:
// - Uses the grain's RW-safe mutation pattern: we mutate in place under
// the grain's implicit expectation that higher layers control access.
// (If strict locking is required around every mutation, wrap logic in
// an explicit g.mu.Lock()/Unlock(), but current model mirrors prior code.)
func (c *CartMutationContext) ChangeQuantity(g *CartGrain, m *messages.ChangeQuantity) error {
if m == nil {
return fmt.Errorf("ChangeQuantity: nil payload")
}
ctx := context.Background()
foundIndex := -1
for i, it := range g.Items {
if it.Id == uint32(m.Id) {
foundIndex = i
break
}
}
if foundIndex == -1 {
return fmt.Errorf("ChangeQuantity: item id %d not found", m.Id)
}
if m.Quantity <= 0 {
// Remove the item
itemToRemove := g.Items[foundIndex]
if itemToRemove.ReservationEndTime != nil && itemToRemove.ReservationEndTime.Before(time.Now()) {
err := c.ReleaseItem(ctx, g.Id, itemToRemove.Sku, itemToRemove.StoreId)
if err != nil {
log.Printf("unable to release reservation for %s in location: %v", itemToRemove.Sku, itemToRemove.StoreId)
}
}
g.Items = append(g.Items[:foundIndex], g.Items[foundIndex+1:]...)
g.UpdateTotals()
return nil
}
item := g.Items[foundIndex]
if item == nil {
return fmt.Errorf("ChangeQuantity: item id %d not found", m.Id)
}
if c.UseReservations(item) {
if item.ReservationEndTime != nil {
err := c.ReleaseItem(ctx, g.Id, item.Sku, item.StoreId)
if err != nil {
log.Printf("unable to release reservation for %s in location: %v", item.Sku, item.StoreId)
}
}
endTime, err := c.ReserveItem(ctx, g.Id, item.Sku, item.StoreId, uint16(m.Quantity))
if err != nil {
return err
}
item.ReservationEndTime = endTime
}
item.Quantity = uint16(m.Quantity)
g.UpdateTotals()
return nil
}

View File

@@ -1,26 +0,0 @@
package cart
import (
"fmt"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
func ClearCart(g *CartGrain, m *messages.ClearCartRequest) error {
if m == nil {
return fmt.Errorf("ClearCart: nil payload")
}
if g.CheckoutStatus != nil {
return fmt.Errorf("ClearCart: cart is in checkout")
}
// Clear items, vouchers, etc., but keep userId, etc.
g.Items = g.Items[:0]
g.Vouchers = g.Vouchers[:0]
g.Notifications = g.Notifications[:0]
g.OrderReference = ""
g.Processing = false
// g.InventoryReserved = false maybe should release inventory
g.UpdateTotals()
return nil
}

View File

@@ -1,20 +0,0 @@
package cart
import (
"fmt"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
func LineItemMarking(grain *CartGrain, req *messages.LineItemMarking) error {
for i, item := range grain.Items {
if item.Id == req.Id {
grain.Items[i].Marking = &Marking{
Type: req.Type,
Text: req.Marking,
}
return nil
}
}
return fmt.Errorf("item with ID %d not found", req.Id)
}

View File

@@ -1,57 +0,0 @@
package cart
import (
"context"
"fmt"
"log"
"time"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
// mutation_remove_item.go
//
// Registers the RemoveItem mutation.
//
// Behavior:
// - Removes the cart line whose local cart line Id == payload.Id
// - If no such line exists returns an error
// - Recalculates cart totals (WithTotals)
//
// Notes:
// - This removes only the line item; any deliveries referencing the removed
// item are NOT automatically adjusted (mirrors prior logic). If future
// semantics require pruning delivery.item_ids you can extend this handler.
// - If multiple lines somehow shared the same Id (should not happen), only
// the first match would be removed—data integrity relies on unique line Ids.
func (c *CartMutationContext) RemoveItem(g *CartGrain, m *messages.RemoveItem) error {
if m == nil {
return fmt.Errorf("RemoveItem: nil payload")
}
targetID := uint32(m.Id)
index := -1
for i, it := range g.Items {
if it.Id == targetID {
index = i
break
}
}
if index == -1 {
return fmt.Errorf("RemoveItem: item id %d not found", m.Id)
}
item := g.Items[index]
if item.ReservationEndTime != nil && item.ReservationEndTime.After(time.Now()) {
err := c.ReleaseItem(context.Background(), g.Id, item.Sku, item.StoreId)
if err != nil {
log.Printf("unable to release item reservation")
}
}
g.Items = append(g.Items[:index], g.Items[index+1:]...)
g.UpdateTotals()
return nil
}

View File

@@ -1,18 +0,0 @@
package cart
import (
"fmt"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
func RemoveLineItemMarking(grain *CartGrain, req *messages.RemoveLineItemMarking) error {
for i, item := range grain.Items {
if item.Id == req.Id {
grain.Items[i].Marking = nil
return nil
}
}
return fmt.Errorf("item with ID %d not found", req.Id)
}

View File

@@ -1,15 +0,0 @@
package cart
import (
"errors"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
func SetUserId(grain *CartGrain, req *messages.SetUserId) error {
if req.UserId == "" {
return errors.New("user ID cannot be empty")
}
grain.userId = req.UserId
return nil
}

View File

@@ -1,20 +0,0 @@
package cart
import (
"fmt"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
func SubscriptionAdded(grain *CartGrain, req *messages.SubscriptionAdded) error {
for i, item := range grain.Items {
if item.Id == req.ItemId {
grain.Items[i].SubscriptionDetailsId = req.DetailsId
grain.Items[i].OrderReference = req.OrderReference
grain.Items[i].IsSubscribed = true
return nil
}
}
return fmt.Errorf("item with ID %d not found", req.ItemId)
}

View File

@@ -1,65 +0,0 @@
package cart
import (
"encoding/json"
"fmt"
messages "git.k6n.net/go-cart-actor/proto/cart"
)
func UpsertSubscriptionDetails(g *CartGrain, m *messages.UpsertSubscriptionDetails) error {
if m == nil {
return nil
}
metaBytes := m.Data.GetValue()
// Create new subscription details when Id is nil.
if m.Id == nil {
// Validate JSON if provided.
var meta json.RawMessage
if metaBytes != nil {
if !json.Valid(metaBytes) {
return fmt.Errorf("subscription details invalid json")
}
meta = json.RawMessage(metaBytes)
}
id := MustNewCartId().String()
g.SubscriptionDetails[id] = &SubscriptionDetails{
Id: id,
Version: 1,
OfferingCode: m.OfferingCode,
SigningType: m.SigningType,
Meta: meta,
}
return nil
}
// Update existing entry.
existing, ok := g.SubscriptionDetails[*m.Id]
if !ok {
return fmt.Errorf("subscription details with id %s not found", *m.Id)
}
changed := false
if m.OfferingCode != "" {
existing.OfferingCode = m.OfferingCode
changed = true
}
if m.SigningType != "" {
existing.SigningType = m.SigningType
changed = true
}
if metaBytes != nil {
if !json.Valid(metaBytes) {
return fmt.Errorf("subscription details invalid json")
}
existing.Meta = json.RawMessage(metaBytes)
changed = true
}
if changed {
existing.Version++
}
return nil
}

View File

@@ -1,159 +0,0 @@
package cart
import (
"encoding/json"
"strconv"
)
func GetTaxAmount(total int64, tax int) int64 {
taxD := 10000 / float64(tax)
return int64(float64(total) / float64((1 + taxD)))
}
type Price struct {
IncVat int64 `json:"incVat"`
VatRates map[float32]int64 `json:"vat,omitempty"`
}
func NewPrice() *Price {
return &Price{
IncVat: 0,
VatRates: make(map[float32]int64),
}
}
func NewPriceFromIncVat(incVat int64, taxRate float32) *Price {
tax := GetTaxAmount(incVat, int(taxRate*100))
return &Price{
IncVat: incVat,
VatRates: map[float32]int64{
taxRate: tax,
},
}
}
func (p *Price) ValueExVat() int64 {
exVat := p.IncVat
for _, amount := range p.VatRates {
exVat -= amount
}
return exVat
}
func (p *Price) TotalVat() int64 {
total := int64(0)
for _, amount := range p.VatRates {
total += amount
}
return total
}
func MultiplyPrice(p Price, qty int64) *Price {
ret := &Price{
IncVat: p.IncVat * qty,
VatRates: make(map[float32]int64),
}
for rate, amount := range p.VatRates {
ret.VatRates[rate] = amount * qty
}
return ret
}
func (p *Price) Multiply(qty int64) {
p.IncVat *= qty
for rate, amount := range p.VatRates {
p.VatRates[rate] = amount * qty
}
}
func (p Price) MarshalJSON() ([]byte, error) {
// Build a stable wire format without calling Price.MarshalJSON recursively
exVat := p.ValueExVat()
var vat map[string]int64
if len(p.VatRates) > 0 {
vat = make(map[string]int64, len(p.VatRates))
for rate, amount := range p.VatRates {
// Rely on default formatting that trims trailing zeros for whole numbers
// Using %g could output scientific notation for large numbers; float32 rates here are small.
key := trimFloat(rate)
vat[key] = amount
}
}
type wire struct {
ExVat int64 `json:"exVat"`
IncVat int64 `json:"incVat"`
Vat map[string]int64 `json:"vat,omitempty"`
}
return json.Marshal(wire{ExVat: exVat, IncVat: p.IncVat, Vat: vat})
}
func (p *Price) UnmarshalJSON(data []byte) error {
type wire struct {
ExVat int64 `json:"exVat"`
IncVat int64 `json:"incVat"`
Vat map[string]int64 `json:"vat,omitempty"`
}
var w wire
if err := json.Unmarshal(data, &w); err != nil {
return err
}
p.IncVat = w.IncVat
if len(w.Vat) > 0 {
p.VatRates = make(map[float32]int64, len(w.Vat))
for rateStr, amount := range w.Vat {
rate, err := strconv.ParseFloat(rateStr, 32)
if err != nil {
return err
}
p.VatRates[float32(rate)] = amount
}
} else {
p.VatRates = make(map[float32]int64)
}
return nil
}
// trimFloat converts a float32 tax rate like 25 or 12.5 into a compact string without
// unnecessary decimals ("25", "12.5").
func trimFloat(f float32) string {
// Convert via FormatFloat then trim trailing zeros and dot.
s := strconv.FormatFloat(float64(f), 'f', -1, 32)
return s
}
func (p *Price) Add(price Price) {
p.IncVat += price.IncVat
for rate, amount := range price.VatRates {
p.VatRates[rate] += amount
}
}
func (p *Price) Subtract(price Price) {
p.IncVat -= price.IncVat
for rate, amount := range price.VatRates {
p.VatRates[rate] -= amount
}
}
func SumPrices(prices ...Price) *Price {
if len(prices) == 0 {
return NewPrice()
}
aggregated := NewPrice()
for _, price := range prices {
aggregated.IncVat += price.IncVat
for rate, amount := range price.VatRates {
aggregated.VatRates[rate] += amount
}
}
if len(aggregated.VatRates) == 0 {
aggregated.VatRates = nil
}
return aggregated
}

View File

@@ -1,238 +0,0 @@
package cart
import (
"encoding/json"
"testing"
)
func TestPriceMarshalJSON(t *testing.T) {
p := Price{IncVat: 13700, VatRates: map[float32]int64{25: 2500, 12: 1200}}
// ExVat = 13700 - (2500+1200) = 10000
data, err := json.Marshal(p)
if err != nil {
t.Fatalf("marshal error: %v", err)
}
// Unmarshal into a generic struct to validate fields
var out struct {
ExVat int64 `json:"exVat"`
IncVat int64 `json:"incVat"`
Vat map[string]int64 `json:"vat"`
}
if err := json.Unmarshal(data, &out); err != nil {
t.Fatalf("unmarshal error: %v", err)
}
if out.ExVat != 10000 {
t.Fatalf("expected exVat 10000 got %d", out.ExVat)
}
if out.IncVat != 13700 {
t.Fatalf("expected incVat 13700 got %d", out.IncVat)
}
if out.Vat["25"] != 2500 || out.Vat["12"] != 1200 {
t.Fatalf("unexpected vat map: %#v", out.Vat)
}
}
func TestNewPriceFromIncVat(t *testing.T) {
p := NewPriceFromIncVat(1250, 25)
if p.IncVat != 1250 {
t.Fatalf("expected IncVat %d got %d", 1250, p.IncVat)
}
if p.VatRates[25] != 250 {
t.Fatalf("expected VAT 25 rate %d got %d", 250, p.VatRates[25])
}
if p.ValueExVat() != 1000 {
t.Fatalf("expected exVat %d got %d", 750, p.ValueExVat())
}
}
func TestSumPrices(t *testing.T) {
// We'll construct prices via raw struct since constructor expects tax math.
// IncVat already includes vat portions.
a := Price{IncVat: 1250, VatRates: map[float32]int64{25: 250}} // ex=1000
b := Price{IncVat: 2740, VatRates: map[float32]int64{25: 500, 12: 240}} // ex=2000
c := Price{IncVat: 0, VatRates: nil}
sum := SumPrices(a, b, c)
if sum.IncVat != 3990 { // 1250+2740
t.Fatalf("expected incVat 3990 got %d", sum.IncVat)
}
if len(sum.VatRates) != 2 {
t.Fatalf("expected 2 vat rates got %d", len(sum.VatRates))
}
if sum.VatRates[25] != 750 {
t.Fatalf("expected 25%% vat 750 got %d", sum.VatRates[25])
}
if sum.VatRates[12] != 240 {
t.Fatalf("expected 12%% vat 240 got %d", sum.VatRates[12])
}
if sum.ValueExVat() != 3000 { // 3990 - (750+240)
t.Fatalf("expected exVat 3000 got %d", sum.ValueExVat())
}
}
func TestSumPricesEmpty(t *testing.T) {
sum := SumPrices()
if sum.IncVat != 0 || sum.VatRates == nil { // constructor sets empty map
t.Fatalf("expected zero price got %#v", sum)
}
}
func TestMultiplyPriceFunction(t *testing.T) {
base := Price{IncVat: 1250, VatRates: map[float32]int64{25: 250}}
multiplied := MultiplyPrice(base, 3)
if multiplied.IncVat != 1250*3 {
t.Fatalf("expected IncVat %d got %d", 1250*3, multiplied.IncVat)
}
if multiplied.VatRates[25] != 250*3 {
t.Fatalf("expected VAT 25 rate %d got %d", 250*3, multiplied.VatRates[25])
}
if multiplied.ValueExVat() != (1250-250)*3 {
t.Fatalf("expected exVat %d got %d", (1250-250)*3, multiplied.ValueExVat())
}
}
func TestPriceAddSubtract(t *testing.T) {
a := Price{IncVat: 1000, VatRates: map[float32]int64{25: 200}}
b := Price{IncVat: 500, VatRates: map[float32]int64{25: 100, 12: 54}}
acc := NewPrice()
acc.Add(a)
acc.Add(b)
if acc.IncVat != 1500 {
t.Fatalf("expected IncVat 1500 got %d", acc.IncVat)
}
if acc.VatRates[25] != 300 || acc.VatRates[12] != 54 {
t.Fatalf("unexpected VAT map: %#v", acc.VatRates)
}
// Subtract b then a returns to zero
acc.Subtract(b)
acc.Subtract(a)
if acc.IncVat != 0 {
t.Fatalf("expected IncVat 0 got %d", acc.IncVat)
}
if len(acc.VatRates) != 2 || acc.VatRates[25] != 0 || acc.VatRates[12] != 0 {
t.Fatalf("expected zeroed vat rates got %#v", acc.VatRates)
}
}
func TestPriceMultiplyMethod(t *testing.T) {
p := Price{IncVat: 2000, VatRates: map[float32]int64{25: 400}}
// Value before multiply
exBefore := p.ValueExVat()
p.Multiply(2)
if p.IncVat != 4000 {
t.Fatalf("expected IncVat 4000 got %d", p.IncVat)
}
if p.VatRates[25] != 800 {
t.Fatalf("expected VAT 800 got %d", p.VatRates[25])
}
if p.ValueExVat() != exBefore*2 {
t.Fatalf("expected exVat %d got %d", exBefore*2, p.ValueExVat())
}
}
func TestGetTaxAmount(t *testing.T) {
tests := []struct {
total int64
tax int
expected int64
desc string
}{
{1250, 2500, 250, "25% VAT"}, // 1250 / (1 + 100/25) = 1250 / 5 = 250
{1000, 2000, 166, "20% VAT"}, // 1000 / (1 + 100/20) = 1000 / 6 ≈ 166
{1200, 2500, 240, "25% VAT on 1200"},
{0, 2500, 0, "zero total"},
{100, 1000, 9, "10% VAT"}, // tax=1000 for 10%, 100 / (1 + 100/10) = 100 / 11 ≈ 9
{100, 10000, 50, "100% VAT"}, // tax=10000 for 100%, 100 / (1 + 100/100) = 100 / 2 = 50
}
for _, tt := range tests {
result := GetTaxAmount(tt.total, tt.tax)
if result != tt.expected {
t.Errorf("GetTaxAmount(%d, %d) [%s] = %d; expected %d", tt.total, tt.tax, tt.desc, result, tt.expected)
}
}
}
func TestNewPriceFromIncVatEdgeCases(t *testing.T) {
// Zero VAT rate
p := NewPriceFromIncVat(1000, 0)
if p.IncVat != 1000 {
t.Errorf("expected IncVat 1000, got %d", p.IncVat)
}
if len(p.VatRates) != 1 || p.VatRates[0] != 0 {
t.Errorf("expected VAT 0 for rate 0, got %v", p.VatRates)
}
if p.ValueExVat() != 1000 {
t.Errorf("expected exVat 1000, got %d", p.ValueExVat())
}
// High VAT rate, e.g., 50%
p = NewPriceFromIncVat(1500, 50)
expectedVat := int64(1500 / (1 + 100/50)) // 1500 / 3 = 500
if p.VatRates[50] != expectedVat {
t.Errorf("expected VAT %d for 50%%, got %d", expectedVat, p.VatRates[50])
}
if p.ValueExVat() != 1500-expectedVat {
t.Errorf("expected exVat %d, got %d", 1500-expectedVat, p.ValueExVat())
}
}
func TestPriceValueExVatAndTotalVat(t *testing.T) {
p := Price{IncVat: 13700, VatRates: map[float32]int64{25: 2500, 12: 1200}}
exVat := p.ValueExVat()
totalVat := p.TotalVat()
if exVat != 10000 {
t.Errorf("expected exVat 10000, got %d", exVat)
}
if totalVat != 3700 {
t.Errorf("expected totalVat 3700, got %d", totalVat)
}
if exVat+totalVat != p.IncVat {
t.Errorf("exVat + totalVat should equal IncVat: %d + %d != %d", exVat, totalVat, p.IncVat)
}
// Empty VAT rates
p2 := Price{IncVat: 500, VatRates: nil}
if p2.ValueExVat() != 500 {
t.Errorf("expected exVat 500 for no VAT, got %d", p2.ValueExVat())
}
if p2.TotalVat() != 0 {
t.Errorf("expected totalVat 0, got %d", p2.TotalVat())
}
}
func TestMultiplyPriceWithZeroQty(t *testing.T) {
base := Price{IncVat: 1250, VatRates: map[float32]int64{25: 250}}
multiplied := MultiplyPrice(base, 0)
if multiplied.IncVat != 0 {
t.Errorf("expected IncVat 0, got %d", multiplied.IncVat)
}
if len(multiplied.VatRates) != 1 || multiplied.VatRates[25] != 0 {
t.Errorf("expected VAT 0, got %v", multiplied.VatRates)
}
}
func TestPriceAddSubtractEdgeCases(t *testing.T) {
a := Price{IncVat: 1000, VatRates: map[float32]int64{25: 200}}
b := Price{IncVat: 500, VatRates: map[float32]int64{12: 54}} // Different rate
acc := NewPrice()
acc.Add(a)
acc.Add(b)
if acc.VatRates[25] != 200 || acc.VatRates[12] != 54 {
t.Errorf("expected VAT 25:200, 12:54, got %v", acc.VatRates)
}
// Subtract more than added (negative VAT)
acc.Subtract(a)
acc.Subtract(b)
acc.Subtract(a) // Subtract extra a
if acc.VatRates[25] != -200 || acc.VatRates[12] != 0 {
t.Errorf("expected negative VAT for 25 after over-subtract, got %v", acc.VatRates)
}
}

View File

@@ -1,198 +0,0 @@
package checkout
import (
"encoding/json"
"sync"
"time"
"git.k6n.net/go-cart-actor/pkg/cart"
)
// CheckoutId is the same as CartId for simplicity
type CheckoutId = cart.CartId
type PickupPoint struct {
DeliveryId uint32 `json:"deliveryId,omitempty"`
Id string `json:"id"`
Name *string `json:"name,omitempty"`
Address *string `json:"address,omitempty"`
City *string `json:"city,omitempty"`
Zip *string `json:"zip,omitempty"`
Country *string `json:"country,omitempty"`
}
type CheckoutDelivery struct {
Id uint32 `json:"id"`
Provider string `json:"provider"`
Price cart.Price `json:"price"`
Items []uint32 `json:"items"`
PickupPoint *PickupPoint `json:"pickupPoint,omitempty"`
}
type PaymentStatus string
type CheckoutPaymentStatus PaymentStatus
const (
PaymentStatusPending PaymentStatus = "pending"
PaymentStatusFailed PaymentStatus = "failed"
PaymentStatusSuccess PaymentStatus = "success"
CheckoutPaymentStatusPending CheckoutPaymentStatus = "pending"
CheckoutPaymentStatusFailed CheckoutPaymentStatus = "failed"
CheckoutPaymentStatusSuccess CheckoutPaymentStatus = "success"
CheckoutPaymentStatusCancelled CheckoutPaymentStatus = "partial"
)
type Payment struct {
PaymentId string `json:"paymentId"`
Status PaymentStatus `json:"status"`
Amount int64 `json:"amount"`
Currency string `json:"currency"`
Provider string `json:"provider,omitempty"`
Method *string `json:"method,omitempty"`
SessionData *json.RawMessage `json:"sessionData,omitempty"`
Events []PaymentEvent `json:"events,omitempty"`
ProcessorReference *string `json:"processorReference,omitempty"`
StartedAt *time.Time `json:"startedAt,omitempty"`
CompletedAt *time.Time `json:"completedAt,omitempty"`
}
type PaymentEvent struct {
Name string `json:"name"`
Success bool `json:"success"`
Data json.RawMessage `json:"data"`
}
func (p *Payment) IsSettled() bool {
if p == nil {
return false
}
switch p.Status {
case PaymentStatusSuccess:
return true
default:
return false
}
}
type ContactDetails struct {
Email *string `json:"email,omitempty"`
Phone *string `json:"phone,omitempty"`
Name *string `json:"name,omitempty"`
PostalCode *string `json:"zip,omitempty"`
}
type ConfirmationStatus struct {
Code *string `json:"code,omitempty"`
ViewCount int `json:"viewCount"`
LastViewedAt time.Time `json:"lastViewedAt"`
}
type CheckoutGrain struct {
mu sync.RWMutex
lastDeliveryId uint32
lastGiftcardId uint32
lastAccess time.Time
lastChange time.Time
Version uint32 `json:"version"`
Id CheckoutId `json:"id"`
CartId cart.CartId `json:"cartId"`
CartVersion uint64 `json:"cartVersion"`
CartState *cart.CartGrain `json:"cartState"` // snapshot of items
CartTotalPrice *cart.Price `json:"cartTotalPrice"`
OrderId *string `json:"orderId"`
Deliveries []*CheckoutDelivery `json:"deliveries,omitempty"`
PaymentInProgress uint16 `json:"paymentInProgress"`
AmountInCentsRemaining int64 `json:"amountRemaining"`
AmountInCentsStarted int64 `json:"amountActive"`
InventoryReserved bool `json:"inventoryReserved"`
Confirmation *ConfirmationStatus `json:"confirmationViewed,omitempty"`
Payments []*Payment `json:"payments,omitempty"`
ContactDetails *ContactDetails `json:"contactDetails,omitempty"`
}
func NewCheckoutGrain(id uint64, cartId cart.CartId, cartVersion uint64, ts time.Time, cartState *cart.CartGrain) *CheckoutGrain {
r := &CheckoutGrain{
lastDeliveryId: 0,
lastGiftcardId: 0,
lastAccess: ts,
lastChange: ts,
Id: CheckoutId(id),
CartId: cartId,
CartVersion: cartVersion,
Deliveries: []*CheckoutDelivery{},
Payments: []*Payment{},
}
if cartState != nil {
r.CartState = cartState
r.CartTotalPrice = cartState.TotalPrice
}
return r
}
func (c *CheckoutGrain) GetId() uint64 {
return uint64(c.Id)
}
func (c *CheckoutGrain) GetLastChange() time.Time {
return c.lastChange
}
func (c *CheckoutGrain) GetLastAccess() time.Time {
return c.lastAccess
}
func (c *CheckoutGrain) GetCurrentState() (*CheckoutGrain, error) {
c.lastAccess = time.Now()
return c, nil
}
func (c *CheckoutGrain) GetState() ([]byte, error) {
return json.Marshal(c)
}
func (c *CheckoutGrain) FindPayment(paymentId string) (*Payment, bool) {
if paymentId == "" {
return nil, false
}
for _, payment := range c.Payments {
if payment != nil && payment.PaymentId == paymentId {
return payment, true
}
}
return nil, false
}
func (c *CheckoutGrain) SettledPayments() []*Payment {
if len(c.Payments) == 0 {
return nil
}
settled := make([]*Payment, 0, len(c.Payments))
for _, payment := range c.Payments {
if payment != nil && payment.IsSettled() {
settled = append(settled, payment)
}
}
if len(settled) == 0 {
return nil
}
return settled
}
func (c *CheckoutGrain) OpenPayments() []*Payment {
if len(c.Payments) == 0 {
return nil
}
pending := make([]*Payment, 0, len(c.Payments))
for _, payment := range c.Payments {
if payment == nil {
continue
}
if !payment.IsSettled() {
pending = append(pending, payment)
}
}
if len(pending) == 0 {
return nil
}
return pending
}

View File

@@ -1,33 +0,0 @@
package checkout
import (
"git.k6n.net/go-cart-actor/pkg/actor"
)
type CheckoutMutationContext struct {
// Add any services needed, e.g., for delivery calculations, but since inventory is pre-handled, maybe none
}
func NewCheckoutMutationContext() *CheckoutMutationContext {
return &CheckoutMutationContext{}
}
func NewCheckoutMutationRegistry(ctx *CheckoutMutationContext) actor.MutationRegistry {
reg := actor.NewMutationRegistry()
reg.RegisterMutations(
actor.NewMutation(HandleInitializeCheckout),
actor.NewMutation(HandlePaymentStarted),
actor.NewMutation(HandlePaymentCompleted),
actor.NewMutation(HandlePaymentDeclined),
actor.NewMutation(HandlePaymentEvent),
actor.NewMutation(HandleConfirmationViewed),
actor.NewMutation(HandleOrderCreated),
actor.NewMutation(HandleInventoryReserved),
actor.NewMutation(HandleSetDelivery),
actor.NewMutation(HandleSetPickupPoint),
actor.NewMutation(HandleRemoveDelivery),
actor.NewMutation(HandleContactDetailsUpdated),
actor.NewMutation(HandlePaymentCancelled),
)
return reg
}

View File

@@ -1,30 +0,0 @@
package checkout
import (
"errors"
"slices"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
func HandlePaymentCancelled(g *CheckoutGrain, m *messages.CancelPayment) error {
payment, found := g.FindPayment(m.PaymentId)
if !found {
return ErrPaymentNotFound
}
if payment.CompletedAt != nil {
return errors.New("payment already completed")
}
g.PaymentInProgress--
g.AmountInCentsStarted -= payment.Amount
g.Payments = removePayment(g.Payments, payment.PaymentId)
return nil
}
func removePayment(payment []*Payment, s string) []*Payment {
return slices.DeleteFunc(payment, func(p *Payment) bool {
return p.PaymentId == s
})
}

View File

@@ -1,26 +0,0 @@
package checkout
import (
"fmt"
"time"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
func HandleConfirmationViewed(g *CheckoutGrain, m *messages.ConfirmationViewed) error {
if m == nil {
return fmt.Errorf("ConfirmationViewed: nil payload")
}
if g.Confirmation != nil {
g.Confirmation = &ConfirmationStatus{
ViewCount: 1,
LastViewedAt: time.Now(),
}
} else {
g.Confirmation.ViewCount++
g.Confirmation.LastViewedAt = time.Now()
}
return nil
}

View File

@@ -1,34 +0,0 @@
package checkout
import (
"fmt"
checkout_messages "git.k6n.net/go-cart-actor/proto/checkout"
)
// HandleContactDetailsUpdated mutation
func HandleContactDetailsUpdated(g *CheckoutGrain, m *checkout_messages.ContactDetailsUpdated) error {
if m == nil {
return fmt.Errorf("HandleContactDetailsUpdated: nil payload")
}
if g.ContactDetails == nil {
g.ContactDetails = &ContactDetails{}
}
if m.PostalCode != nil {
g.ContactDetails.PostalCode = m.PostalCode
}
if m.Email != nil {
g.ContactDetails.Email = m.Email
}
if m.Phone != nil {
g.ContactDetails.Phone = m.Phone
}
if m.Name != nil {
g.ContactDetails.Name = m.Name
}
return nil
}

View File

@@ -1,94 +0,0 @@
package checkout
import (
"testing"
checkout_messages "git.k6n.net/go-cart-actor/proto/checkout"
)
func TestHandleContactDetailsUpdated(t *testing.T) {
tests := []struct {
name string
initial *ContactDetails
update *checkout_messages.ContactDetailsUpdated
expected *ContactDetails
}{
{
name: "update all fields",
initial: nil,
update: &checkout_messages.ContactDetailsUpdated{
Email: stringPtr("test@example.com"),
Phone: stringPtr("123456789"),
Name: stringPtr("John Doe"),
},
expected: &ContactDetails{
Email: stringPtr("test@example.com"),
Phone: stringPtr("123456789"),
Name: stringPtr("John Doe"),
},
},
{
name: "update partial fields",
initial: &ContactDetails{
Email: stringPtr("old@example.com"),
Phone: nil,
Name: stringPtr("Old Name"),
},
update: &checkout_messages.ContactDetailsUpdated{
Phone: stringPtr("987654321"),
},
expected: &ContactDetails{
Email: stringPtr("old@example.com"),
Phone: stringPtr("987654321"),
Name: stringPtr("Old Name"),
},
},
{
name: "nil message",
initial: nil,
update: nil,
expected: &ContactDetails{}, // but error expected
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
grain := &CheckoutGrain{
ContactDetails: tt.initial,
}
err := HandleContactDetailsUpdated(grain, tt.update)
if tt.name == "nil message" {
if err == nil {
t.Errorf("expected error for nil message, got nil")
}
return
}
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if grain.ContactDetails == nil && tt.expected != nil {
t.Errorf("expected contact details, got nil")
} else if grain.ContactDetails != nil && tt.expected == nil {
t.Errorf("expected nil contact details, got %v", grain.ContactDetails)
} else if grain.ContactDetails != nil && tt.expected != nil {
if (grain.ContactDetails.Email == nil && tt.expected.Email != nil) || (grain.ContactDetails.Email != nil && tt.expected.Email == nil) || (grain.ContactDetails.Email != nil && *grain.ContactDetails.Email != *tt.expected.Email) {
t.Errorf("email mismatch: got %v, expected %v", grain.ContactDetails.Email, tt.expected.Email)
}
if (grain.ContactDetails.Phone == nil && tt.expected.Phone != nil) || (grain.ContactDetails.Phone != nil && tt.expected.Phone == nil) || (grain.ContactDetails.Phone != nil && *grain.ContactDetails.Phone != *tt.expected.Phone) {
t.Errorf("phone mismatch: got %v, expected %v", grain.ContactDetails.Phone, tt.expected.Phone)
}
if (grain.ContactDetails.Name == nil && tt.expected.Name != nil) || (grain.ContactDetails.Name != nil && tt.expected.Name == nil) || (grain.ContactDetails.Name != nil && *grain.ContactDetails.Name != *tt.expected.Name) {
t.Errorf("name mismatch: got %v, expected %v", grain.ContactDetails.Name, tt.expected.Name)
}
}
})
}
}
func stringPtr(s string) *string {
return &s
}

View File

@@ -1,63 +0,0 @@
package checkout
import (
"fmt"
"git.k6n.net/go-cart-actor/pkg/cart"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
func asPickupPoint(p *messages.PickupPoint, deliveryId uint32) *PickupPoint {
if p == nil {
return nil
}
if p.Address == nil {
return &PickupPoint{
Id: p.Id,
Name: p.Name,
DeliveryId: deliveryId,
}
}
return &PickupPoint{
DeliveryId: deliveryId,
Id: p.Id,
Name: p.Name,
Address: &p.Address.AddressLine1,
City: &p.Address.City,
Zip: &p.Address.Zip,
Country: &p.Address.Country,
}
}
// HandleSetDelivery mutation
// HandleSetDelivery mutation
func HandleSetDelivery(g *CheckoutGrain, m *messages.SetDelivery) error {
if m == nil {
return fmt.Errorf("HandleSetDelivery: nil payload")
}
if m.Provider == "" {
return fmt.Errorf("HandleSetDelivery: missing provider")
}
// Check if delivery already exists, update or add
for _, d := range g.Deliveries {
if d.Provider == m.Provider {
// Update existing
d.Items = m.Items
d.PickupPoint = asPickupPoint(m.PickupPoint, d.Id)
return nil
}
}
// Add new delivery
g.lastDeliveryId++
delivery := &CheckoutDelivery{
Id: g.lastDeliveryId,
Provider: m.Provider,
Items: m.Items,
PickupPoint: asPickupPoint(m.PickupPoint, g.lastDeliveryId),
Price: *cart.NewPrice(), // Price might need calculation, but for now zero
}
g.Deliveries = append(g.Deliveries, delivery)
return nil
}

View File

@@ -1,53 +0,0 @@
package checkout
import (
"encoding/json"
"fmt"
"git.k6n.net/go-cart-actor/pkg/cart"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
// mutation_initialize_checkout.go
//
// Registers the InitializeCheckout mutation.
// This mutation is invoked AFTER an external checkout session
// has been successfully created or updated. It persists the
// order reference / status and marks the checkout as having a payment in progress.
//
// Behavior:
// - Sets OrderId to the order ID.
// - Sets Status to the current status.
// - Sets PaymentInProgress flag.
// - Assumes inventory is already reserved.
//
// Validation:
// - Returns an error if payload is nil.
// - Returns an error if orderId is empty.
func HandleInitializeCheckout(g *CheckoutGrain, m *messages.InitializeCheckout) error {
if m == nil {
return fmt.Errorf("InitializeCheckout: nil payload")
}
// if g.OrderId == "" {
// return fmt.Errorf("InitializeCheckout: missing orderId")
// }
if g.CartState != nil {
if g.CartId != cart.CartId(m.CartId) {
return fmt.Errorf("InitializeCheckout: cart ID mismatch")
}
if g.PaymentInProgress > 0 || g.OrderId != nil {
return fmt.Errorf("InitializeCheckout: payment already in progress")
}
}
err := json.Unmarshal(m.CartState.Value, &g.CartState)
if err != nil {
return err
}
g.CartTotalPrice = g.CartState.TotalPrice
g.AmountInCentsRemaining = g.CartTotalPrice.IncVat
return nil
}

View File

@@ -1,16 +0,0 @@
package checkout
import (
"fmt"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
func HandleInventoryReserved(g *CheckoutGrain, m *messages.InventoryReserved) error {
if m == nil {
return fmt.Errorf("HandleInventoryReserved: nil payload")
}
g.InventoryReserved = m.Status == "success"
return nil
}

View File

@@ -1,49 +0,0 @@
package checkout
import (
"fmt"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
// mutation_order_created.go
//
// Registers the OrderCreated mutation.
//
// This mutation represents the completion (or state transition) of an order
// initiated earlier via InitializeCheckout / external processing.
// It finalizes (or updates) the checkout's order metadata.
//
// Behavior:
// - Validates payload non-nil and OrderId not empty.
// - Sets Status from payload.Status.
// - Sets OrderId if not already set.
// - Does NOT adjust monetary totals.
//
// Notes / Future Extensions:
// - If multiple order completion events can arrive (e.g., retries / webhook
// replays), this handler is idempotent: it simply overwrites fields.
// - If you need to guard against conflicting order IDs, add a check:
// if g.OrderId != "" && g.OrderId != m.OrderId { ... }
// - Add audit logging or metrics here if required.
//
// Concurrency:
// - Relies on the higher-level guarantee that Apply() calls are serialized
// per grain. If out-of-order events are possible, embed versioning or
// timestamps in the mutation and compare before applying changes.
func HandleOrderCreated(g *CheckoutGrain, m *messages.OrderCreated) error {
if m == nil {
return fmt.Errorf("HandleOrderCreated: nil payload")
}
if m.OrderId == "" {
return fmt.Errorf("OrderCreated: missing orderId")
}
if g.OrderId == nil {
g.OrderId = &m.OrderId
} else if *g.OrderId != m.OrderId {
return fmt.Errorf("OrderCreated: conflicting order ID")
}
return nil
}

View File

@@ -1,47 +0,0 @@
package checkout
import (
"fmt"
"time"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
// PaymentCompleted registers the completion of a payment for a checkout.
func HandlePaymentCompleted(g *CheckoutGrain, m *messages.PaymentCompleted) error {
if m == nil {
return fmt.Errorf("PaymentCompleted: nil payload")
}
paymentId := m.PaymentId
payment, found := g.FindPayment(paymentId)
if !found {
return fmt.Errorf("PaymentCompleted: payment not found")
}
payment.ProcessorReference = m.ProcessorReference
payment.Status = PaymentStatusSuccess
if m.Amount > 0 {
payment.Amount = m.Amount
}
if m.Currency != "" {
payment.Currency = m.Currency
}
if m.CompletedAt != nil {
payment.CompletedAt = asPointer(m.CompletedAt.AsTime())
} else {
payment.CompletedAt = asPointer(time.Now())
}
// Update checkout status
g.PaymentInProgress--
sum := g.CartState.TotalPrice.IncVat
for _, payment := range g.SettledPayments() {
sum -= payment.Amount
}
g.AmountInCentsRemaining = sum
return nil
}

View File

@@ -1,29 +0,0 @@
package checkout
import (
"errors"
"time"
messages "git.k6n.net/go-cart-actor/proto/checkout"
)
func asPointer[T any](value T) *T {
return &value
}
var ErrPaymentNotFound = errors.New("payment not found")
func HandlePaymentDeclined(g *CheckoutGrain, m *messages.PaymentDeclined) error {
payment, found := g.FindPayment(m.PaymentId)
if !found {
return ErrPaymentNotFound
}
payment.CompletedAt = asPointer(time.Now())
payment.Status = "failed"
g.PaymentInProgress--
g.AmountInCentsStarted -= payment.Amount
return nil
}

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