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refactor/grpc #3

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396
GRPC-MIGRATION-PLAN.md Normal file
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@@ -0,0 +1,396 @@
# gRPC Migration Plan
File: GRPC-MIGRATION-PLAN.md
Author: (Generated plan)
Status: Draft for review
Target Release: Next major version (breaking change – no mixed compatibility)
---
## 1. Overview
This document describes the full migration of the current custom TCP frame-based protocol (both the cart mutation/state channel on port `1337` and the control plane on port `1338`) to gRPC. We will remove all legacy packet framing (`FrameWithPayload`, `RemoteGrain`, `GenericListener` handlers for these two ports) and replace them with two gRPC services:
1. Cart Actor Service (mutations + state retrieval)
2. Control Plane Service (cluster membership, negotiation, ownership change, lifecycle)
We intentionally keep:
- Internal `CartGrain` logic, message storage format, disk persistence, and JSON cart serialization.
- Existing message type numeric mapping for backward compatibility with persisted event logs.
- HTTP/REST API layer unchanged (it still consumes JSON state from the local/remote grain pipeline).
We do NOT implement mixed-version compatibility; migration occurs atomically (cluster restart with new image).
---
## 2. Goals
- Remove custom binary frame protocol & simplify maintenance.
- Provide clearer, strongly defined interfaces via `.proto` schemas.
- Improve observability via gRPC interceptors (metrics & tracing hooks).
- Reduce per-call overhead compared with the current manual connection pooling + handwritten framing (HTTP/2 multiplexing + connection reuse).
- Prepare groundwork for future enhancements (streaming, typed state, event streaming) without rewriting again.
---
## 3. Non-Goals (Phase 1)
- Converting the cart state payload from JSON to a strongly typed proto.
- Introducing authentication / mTLS (may be added later).
- Changing persistence or replay format.
- Changing the HTTP API contract.
- Implementing streaming watchers or push updates.
---
## 4. Architecture After Migration
Ports:
- `:1337` → gRPC CartActor service.
- `:1338` → gRPC ControlPlane service.
Each node:
- Runs one gRPC server with both services (can use a single listener bound to two services or keep two separate listeners; we will keep two ports initially to minimize operational surprise, but they could be merged later).
- Maintains a connection pool of `*grpc.ClientConn` objects keyed by remote hostname (one per remote host, reused for both services).
Call Flow (Mutation):
1. HTTP request hits `PoolServer`.
2. `SyncedPool.getGrain(cartId)`:
- Local: direct invocation.
- Remote: uses `RemoteGrainGRPC` (new) which invokes `CartActor.Mutate`.
3. Response JSON returned unchanged.
Control Plane Flow:
- Discovery (K8s watch) still triggers `AddRemote(host)`.
- Instead of custom `Ping`, `Negotiate`, etc. via frames, call gRPC methods on `ControlPlane` service.
- Ownership changes use `ConfirmOwner` RPC.
---
## 5. Proto Design
### 5.1 Cart Actor Proto (Envelope Pattern)
We keep an envelope with `bytes payload` holding the serialized underlying cart mutation proto (existing types in `messages.proto`). This minimizes churn.
Indented code block (proto sketch):
syntax = "proto3";
package cart;
option go_package = "git.tornberg.me/go-cart-actor/proto;proto";
enum MutationType {
MUTATION_TYPE_UNSPECIFIED = 0;
MUTATION_ADD_REQUEST = 1;
MUTATION_ADD_ITEM = 2;
MUTATION_REMOVE_ITEM = 4;
MUTATION_REMOVE_DELIVERY = 5;
MUTATION_CHANGE_QUANTITY = 6;
MUTATION_SET_DELIVERY = 7;
MUTATION_SET_PICKUP_POINT = 8;
MUTATION_CREATE_CHECKOUT_ORDER = 9;
MUTATION_SET_CART_ITEMS = 10;
MUTATION_ORDER_COMPLETED = 11;
}
message MutationRequest {
string cart_id = 1;
MutationType type = 2;
bytes payload = 3; // Serialized specific mutation proto
int64 client_timestamp = 4; // Optional; server fills if zero
}
message MutationReply {
int32 status_code = 1;
bytes payload = 2; // JSON cart state or error string
}
message StateRequest {
string cart_id = 1;
}
message StateReply {
int32 status_code = 1;
bytes payload = 2; // JSON cart state
}
service CartActor {
rpc Mutate(MutationRequest) returns (MutationReply);
rpc GetState(StateRequest) returns (StateReply);
}
### 5.2 Control Plane Proto
syntax = "proto3";
package control;
option go_package = "git.tornberg.me/go-cart-actor/proto;proto";
message Empty {}
message PingReply {
string host = 1;
int64 unix_time = 2;
}
message NegotiateRequest {
repeated string known_hosts = 1;
}
message NegotiateReply {
repeated string hosts = 1; // Healthy hosts returned
}
message CartIdsReply {
repeated string cart_ids = 1;
}
message OwnerChangeRequest {
string cart_id = 1;
string new_host = 2;
}
message OwnerChangeAck {
bool accepted = 1;
string message = 2;
}
message ClosingNotice {
string host = 1;
}
service ControlPlane {
rpc Ping(Empty) returns (PingReply);
rpc Negotiate(NegotiateRequest) returns (NegotiateReply);
rpc GetCartIds(Empty) returns (CartIdsReply);
rpc ConfirmOwner(OwnerChangeRequest) returns (OwnerChangeAck);
rpc Closing(ClosingNotice) returns (OwnerChangeAck);
}
---
## 6. Message Type Mapping
| Legacy Constant | Numeric | New Enum Value |
|-----------------|---------|-----------------------------|
| AddRequestType | 1 | MUTATION_ADD_REQUEST |
| AddItemType | 2 | MUTATION_ADD_ITEM |
| RemoveItemType | 4 | MUTATION_REMOVE_ITEM |
| RemoveDeliveryType | 5 | MUTATION_REMOVE_DELIVERY |
| ChangeQuantityType | 6 | MUTATION_CHANGE_QUANTITY |
| SetDeliveryType | 7 | MUTATION_SET_DELIVERY |
| SetPickupPointType | 8 | MUTATION_SET_PICKUP_POINT |
| CreateCheckoutOrderType | 9 | MUTATION_CREATE_CHECKOUT_ORDER |
| SetCartItemsType | 10 | MUTATION_SET_CART_ITEMS |
| OrderCompletedType | 11 | MUTATION_ORDER_COMPLETED |
Persisted events keep original numeric codes; reconstruction simply casts to `MutationType`.
---
## 7. Components To Remove / Replace
Remove (after migration complete):
- `remote-grain.go`
- `rpc-server.go`
- Any packet/frame-specific types solely used by the above (search: `FrameWithPayload`, `RemoteHandleMutation`, `RemoteGetState` where not reused by disk or internal logic).
- The constants representing network frame types in `synced-pool.go` (RemoteNegotiate, AckChange, etc.) replaced by gRPC calls.
- netpool usage for remote cart channel (control plane also no longer needs `Connection` abstraction).
Retain (until reworked or optionally cleaned later):
- `message.go` (for persistence)
- `message-handler.go`
- `cart-grain.go`
- `messages.proto` (underlying mutation messages)
- HTTP API server and REST handlers.
---
## 8. New / Modified Components
New files (planned):
- `proto/cart_actor.proto`
- `proto/control_plane.proto`
- `grpc/cart_actor_server.go` (server impl)
- `grpc/cart_actor_client.go` (client adapter implementing `Grain`)
- `grpc/control_plane_server.go`
- `grpc/control_plane_client.go`
- `grpc/interceptors.go` (metrics, logging, optional tracing hooks)
- `remote_grain_grpc.go` (adapter bridging existing interfaces)
- `control_plane_adapter.go` (replaces frame handlers in `SyncedPool`)
Modified:
- `synced-pool.go` (remote host management now uses gRPC clients; negotiation logic updated)
- `main.go` (initialize both gRPC services on startup)
- `go.mod` (add `google.golang.org/grpc`)
---
## 9. Step-by-Step Migration Plan
1. Add proto files and generate Go code (`protoc --go_out --go-grpc_out`).
2. Implement `CartActorServer`:
- Translate `MutationRequest` to `Message`.
- Use existing handler registry for payload encode/decode.
- Return JSON cart state.
3. Implement `CartActorClient` wrapper (`RemoteGrainGRPC`) implementing:
- `HandleMessage`: Build envelope, call `Mutate`.
- `GetCurrentState`: Call `GetState`.
4. Implement `ControlPlaneServer` with methods:
- `Ping`: returns host + time.
- `Negotiate`: merge host lists; emulate old logic.
- `GetCartIds`: iterate local grains.
- `ConfirmOwner`: replicate quorum flow (accept always; error path for future).
- `Closing`: schedule remote removal.
5. Implement `ControlPlaneClient` used inside `SyncedPool.AddRemote`.
6. Refactor `SyncedPool`:
- Replace frame handlers registration with gRPC client calls.
- Replace `Server.AddHandler(...)` start-up with launching gRPC server.
- Implement periodic health checks using `Ping`.
7. Remove old connection constructs for 1337/1338.
8. Metrics:
- Add unary interceptor capturing duration and status.
- Replace packet counters with `cart_grpc_mutate_calls_total`, `cart_grpc_control_calls_total`, histograms for latency.
9. Update `main.go` to start:
- gRPC server(s).
- HTTP server as before.
10. Delete legacy files & update README build instructions.
11. Load testing & profiling on Raspberry Pi hardware (or ARM emulation).
12. Final cleanup & dead code removal (search for now-unused constants & structs).
13. Tag release.
---
## 10. Performance Considerations (Raspberry Pi Focus)
- Single `*grpc.ClientConn` per remote host (HTTP/2 multiplexing) to reduce file descriptor and handshake overhead.
- Use small keepalive pings (optional) only if connections drop; default may suffice.
- Avoid reflection / dynamic dispatch in hot path: pre-build a mapping from `MutationType` to handler function.
- Reuse byte buffers:
- Implement a `sync.Pool` for mutation serialization to reduce GC pressure.
- Enforce per-RPC deadlines (e.g. 300–400ms) to avoid pile-ups.
- Backpressure:
- Before dispatch: if local grain pool at capacity and target grain is remote, abort early with 503 to caller (optional).
- Disable gRPC compression for small payloads (mutation messages are small). Condition compression if payload > threshold (e.g. 8KB).
- Compile with `-ldflags="-s -w"` in production to reduce binary size (optional).
- Enable `GOMAXPROCS` tuned to CPU cores; Pi often benefits from leaving default but monitor.
- Use histograms with limited buckets to reduce Prometheus cardinality.
---
## 11. Testing Strategy
Unit:
- Message type mapping tests (legacy -> enum).
- Envelope roundtrip: Original proto -> payload -> gRPC -> server decode -> internal Message.
Integration:
- Two-node cluster simulation:
- Mutate cart on Node A, ownership moves, verify remote access from Node B.
- Quorum failure simulation (temporarily reject `ConfirmOwner`).
- Control plane negotiation: start nodes in staggered order, assert final membership.
Load/Perf:
- Benchmark local mutation vs remote mutation latency.
- High concurrency test (N goroutines each performing X mutations).
- Memory profiling (ensure no large buffer retention).
Failure Injection:
- Kill a node mid-mutation; client call should timeout and not corrupt local state.
- Simulated network partition: drop `Ping` replies; ensure host removal path triggers.
---
## 12. Rollback Strategy
Because no mixed-version compatibility is provided, rollback = redeploy previous version containing legacy protocol:
1. Stop all new-version pods.
2. Deploy old version cluster-wide.
3. No data migration needed (event persistence unaffected).
Note: Avoid partial upgrades; perform full rolling restart quickly to prevent split-brain (new nodes won’t talk to old nodes).
---
## 13. Risks & Mitigations
| Risk | Description | Mitigation |
|------|-------------|------------|
| Full-cluster restart required | No mixed compatibility | Schedule maintenance window |
| gRPC adds CPU overhead | Envelope + marshaling cost | Buffer reuse, keep small messages uncompressed |
| Ownership race | Timing differences after refactor | Add explicit logs + tests around `RequestOwnership` path |
| Hidden dependency on frame-level status codes | Some code may assume `FrameWithPayload` fields | Wrap gRPC responses into minimal compatibility structs until fully removed |
| Memory growth | Connection reuse & pooled buffers not implemented initially | Add `sync.Pool` & track memory via pprof early |
---
## 14. Logging & Observability
- Structured log entries for:
- Ownership changes
- Negotiation rounds
- Remote spawn events
- Mutation failures (with cart id, mutation type)
- Metrics:
- `cart_grpc_mutate_duration_seconds` (histogram)
- `cart_grpc_mutate_errors_total`
- `cart_grpc_control_duration_seconds`
- `cart_remote_hosts` (gauge)
- Retain existing grain counts.
- Optional future: OpenTelemetry tracing (span per remote mutation).
---
## 15. Future Enhancements (Post-Migration)
- Replace JSON state with `CartState` proto and provide streaming watch API.
- mTLS between nodes (certificate rotation via K8s Secret or SPIRE).
- Distributed tracing integration.
- Ownership leasing with TTL and optimistic renewal.
- Delta replication or CRDT-based conflict resolution for experimentation.
---
## 16. Task Breakdown & Estimates
| Task | Estimate |
|------|----------|
| Proto definitions & generation | 0.5d |
| CartActor server/client | 1.0d |
| ControlPlane server/client | 1.0d |
| SyncedPool refactor | 1.0d |
| Metrics & interceptors | 0.5d |
| Remove legacy code & cleanup | 0.5d |
| Tests (unit + integration) | 1.5d |
| Benchmark & tuning | 0.5–1.0d |
| Total | ~6–7d |
---
## 17. Open Questions (Confirm Before Implementation)
1. Combine both services on a single port (simplify ops) or keep dual-port first? (Default here: keep dual, but easy to merge.)
2. Minimum Go version remains 1.24.x—acceptable to add `google.golang.org/grpc` latest?
3. Accept adding `sync.Pool` micro-optimizations in first pass or postpone?
---
## 18. Acceptance Criteria
- All previous integration tests (adjusted to gRPC) pass.
- Cart operations (add, remove, delivery, checkout) function across at least a 2‑node cluster.
- Control plane negotiation forms consistent host list.
- Latency for a remote mutation does not degrade beyond an acceptable threshold (define baseline before merge).
- Legacy networking code fully removed.
---
## 19. Next Steps (If Approved)
1. Implement proto files and commit.
2. Scaffold server & client code.
3. Refactor `SyncedPool` and `main.go`.
4. Add metrics and tests.
5. Run benchmark on target Pi hardware.
6. Review & merge.
---
End of Plan.

11
README.md
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@@ -6,7 +6,7 @@ A distributed cart management system using the actor model pattern.
- Go 1.24.2+ - Go 1.24.2+
- Protocol Buffers compiler (`protoc`) - Protocol Buffers compiler (`protoc`)
- protoc-gen-go plugin - protoc-gen-go and protoc-gen-go-grpc plugins
### Installing Protocol Buffers ### Installing Protocol Buffers
@@ -32,17 +32,20 @@ sudo apt install protobuf-compiler
```bash ```bash
go install google.golang.org/protobuf/cmd/protoc-gen-go@latest 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 ## Working with Protocol Buffers
### Generating Go code from proto files ### Generating Go code from proto files
After modifying `proto/messages.proto`, regenerate the Go code: 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 ```bash
cd proto cd proto
protoc --go_out=. --go_opt=paths=source_relative messages.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 ### Protocol Buffer Messages
@@ -75,6 +78,6 @@ go test ./...
## Important Notes ## Important Notes
- Always regenerate protobuf Go code after modifying `.proto` files - 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 - The generated `messages.pb.go` file should not be edited manually
- Make sure your PATH includes the protoc-gen-go binary location (usually `$GOPATH/bin`) - Make sure your PATH includes the protoc-gen-go binary location (usually `$GOPATH/bin`)

16
cart-grain.go
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@@ -14,6 +14,22 @@ import (
type CartId [16]byte type CartId [16]byte
// String returns the cart id as a trimmed UTF-8 string (trailing zero bytes removed).
func (id CartId) String() string {
n := 0
for n < len(id) && id[n] != 0 {
n++
}
return string(id[:n])
}
// ToCartId converts an arbitrary string to a fixed-size CartId (truncating or padding with zeros).
func ToCartId(s string) CartId {
var id CartId
copy(id[:], []byte(s))
return id
}
func (id CartId) MarshalJSON() ([]byte, error) { func (id CartId) MarshalJSON() ([]byte, error) {
return json.Marshal(id.String()) return json.Marshal(id.String())
} }

248
cart-grain_test.go
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@@ -1,248 +0,0 @@
package main
import (
"testing"
"time"
messages "git.tornberg.me/go-cart-actor/proto"
)
func GetMessage(t uint16, data interface{}) *Message {
ts := time.Now().Unix()
return &Message{
TimeStamp: &ts,
Type: t,
Content: data,
}
}
func TestTaxAmount(t *testing.T) {
taxAmount := GetTaxAmount(12500, 2500)
if taxAmount != 2500 {
t.Errorf("Expected 2500, got %d\n", taxAmount)
}
}
func TestAddToCartShortCut(t *testing.T) {
grain, err := spawn(ToCartId("kalle"))
if err != nil {
t.Errorf("Error spawning: %v\n", err)
}
if len(grain.Items) != 0 {
t.Errorf("Expected 0 items, got %d\n", len(grain.Items))
}
msg := GetMessage(AddItemType, &messages.AddItem{
Quantity: 2,
Price: 100,
Sku: "123",
Name: "Test item",
Image: "test.jpg",
})
_, err = grain.HandleMessage(msg, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if len(grain.Items) != 1 {
t.Errorf("Expected 1 item, got %d\n", len(grain.Items))
}
if grain.Items[0].Quantity != 2 {
t.Errorf("Expected quantity 2, got %d\n", grain.Items[0].Quantity)
}
if len(grain.storageMessages) != 1 {
t.Errorf("Expected 1 storage message, got %d\n", len(grain.storageMessages))
}
shortCutMessage := GetMessage(AddRequestType, &messages.AddRequest{
Quantity: 2,
Sku: "123",
})
_, err = grain.HandleMessage(shortCutMessage, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if len(grain.Items) != 1 {
t.Errorf("Expected 1 item, got %d\n", len(grain.Items))
}
if len(grain.storageMessages) != 2 {
t.Errorf("Expected 2 storage message, got %d\n", len(grain.storageMessages))
}
if grain.storageMessages[0].Type != AddItemType {
t.Errorf("Expected AddItemType, got %d\n", grain.storageMessages[0].Type)
}
if grain.storageMessages[1].Type != AddRequestType {
t.Errorf("Expected AddRequestType, got %d\n", grain.storageMessages[1].Type)
}
}
func TestAddRequestToGrain(t *testing.T) {
grain, err := spawn(ToCartId("kalle"))
if err != nil {
t.Errorf("Error spawning: %v\n", err)
}
msg := GetMessage(AddRequestType, &messages.AddRequest{
Quantity: 2,
Sku: "763281",
})
result, err := grain.HandleMessage(msg, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if result.StatusCode != 200 {
t.Errorf("Call failed\n")
}
t.Log(result)
}
func TestAddToCart(t *testing.T) {
grain, err := spawn(ToCartId("kalle"))
if err != nil {
t.Errorf("Error spawning: %v\n", err)
}
if len(grain.Items) != 0 {
t.Errorf("Expected 0 items, got %d\n", len(grain.Items))
}
msg := GetMessage(AddItemType, &messages.AddItem{
Quantity: 2,
Price: 100,
Sku: "123",
Name: "Test item",
Image: "test.jpg",
})
result, err := grain.HandleMessage(msg, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if result.StatusCode != 200 {
t.Errorf("Call failed\n")
}
if grain.TotalPrice != 200 {
t.Errorf("Expected total price 200, got %d\n", grain.TotalPrice)
}
if len(grain.Items) != 1 {
t.Errorf("Expected 1 item, got %d\n", len(grain.Items))
}
if grain.Items[0].Quantity != 2 {
t.Errorf("Expected quantity 2, got %d\n", grain.Items[0].Quantity)
}
result, err = grain.HandleMessage(msg, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if result.StatusCode != 200 {
t.Errorf("Call failed\n")
}
if grain.Items[0].Quantity != 4 {
t.Errorf("Expected quantity 4, got %d\n", grain.Items[0].Quantity)
}
if grain.TotalPrice != 400 {
t.Errorf("Expected total price 400, got %d\n", grain.TotalPrice)
}
}
func TestSetDelivery(t *testing.T) {
grain, err := spawn(ToCartId("kalle"))
if err != nil {
t.Errorf("Error spawning: %v\n", err)
}
if len(grain.Items) != 0 {
t.Errorf("Expected 0 items, got %d\n", len(grain.Items))
}
msg := GetMessage(AddItemType, &messages.AddItem{
Quantity: 2,
Price: 100,
Sku: "123",
Name: "Test item",
Image: "test.jpg",
})
grain.HandleMessage(msg, false)
msg = GetMessage(AddItemType, &messages.AddItem{
Quantity: 2,
Price: 100,
Sku: "123",
Name: "Test item",
Image: "test.jpg",
})
result, err := grain.HandleMessage(msg, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if result.StatusCode != 200 {
t.Errorf("Call failed\n")
}
setDelivery := GetMessage(SetDeliveryType, &messages.SetDelivery{
Provider: "test",
Items: []int64{1},
})
_, err = grain.HandleMessage(setDelivery, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if len(grain.Deliveries) != 1 {
t.Errorf("Expected 1 delivery, got %d\n", len(grain.Deliveries))
}
if len(grain.Deliveries[0].Items) != 1 {
t.Errorf("Expected 1 items in delivery, got %d\n", len(grain.Deliveries[0].Items))
}
}
func TestSetDeliveryOnAll(t *testing.T) {
grain, err := spawn(ToCartId("kalle"))
if err != nil {
t.Errorf("Error spawning: %v\n", err)
}
if len(grain.Items) != 0 {
t.Errorf("Expected 0 items, got %d\n", len(grain.Items))
}
msg := GetMessage(AddItemType, &messages.AddItem{
Quantity: 2,
Price: 100,
Sku: "123",
Name: "Test item",
Image: "test.jpg",
})
grain.HandleMessage(msg, false)
msg = GetMessage(AddItemType, &messages.AddItem{
Quantity: 2,
Price: 100,
Sku: "1233",
Name: "Test item2",
Image: "test.jpg",
})
result, err := grain.HandleMessage(msg, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if result.StatusCode != 200 {
t.Errorf("Call failed\n")
}
setDelivery := GetMessage(SetDeliveryType, &messages.SetDelivery{
Provider: "test",
Items: []int64{},
})
_, err = grain.HandleMessage(setDelivery, false)
if err != nil {
t.Errorf("Error handling message: %v\n", err)
}
if len(grain.Deliveries) != 1 {
t.Errorf("Expected 1 delivery, got %d\n", len(grain.Deliveries))
}
if len(grain.Deliveries[0].Items) != 2 {
t.Errorf("Expected 2 items in delivery, got %d\n", len(grain.Deliveries[0].Items))
}
}

7
discarded-host.go
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@@ -9,7 +9,6 @@ import (
) )
type DiscardedHost struct { type DiscardedHost struct {
*Connection
Host string Host string
Tries int Tries int
} }
@@ -26,7 +25,7 @@ func (d *DiscardedHostHandler) run() {
d.mu.RLock() d.mu.RLock()
lst := make([]*DiscardedHost, 0, len(d.hosts)) lst := make([]*DiscardedHost, 0, len(d.hosts))
for _, host := range d.hosts { for _, host := range d.hosts {
if host.Tries >= 0 || host.Tries < 5 { if host.Tries >= 0 && host.Tries < 5 {
go d.testConnection(host) go d.testConnection(host)
lst = append(lst, host) lst = append(lst, host)
} else { } else {
@@ -49,7 +48,9 @@ func (d *DiscardedHostHandler) testConnection(host *DiscardedHost) {
if err != nil { if err != nil {
host.Tries++ host.Tries++
host.Tries = -1 if host.Tries >= 5 {
// Exceeded retry threshold; will be dropped by run loop.
}
} else { } else {
conn.Close() conn.Close()
if d.onConnection != nil { if d.onConnection != nil {

18
discarded-host_test.go
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@@ -1,18 +0,0 @@
package main
import (
"testing"
"time"
)
func TestDiscardedHost(t *testing.T) {
dh := NewDiscardedHostHandler(8080)
dh.SetReconnectHandler(func(host string) {
t.Log(host)
})
dh.AppendHost("localhost")
time.Sleep(2 * time.Second)
if dh.hosts[0].Tries == 0 {
t.Error("Host not tested")
}
}

102
frames.go Normal file
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@@ -0,0 +1,102 @@
package main
// Minimal frame abstractions retained after removal of the legacy TCP/frame
// networking layer. These types remain only to avoid a wide cascading refactor
// across existing grain / pool logic that still constructs and passes
// FrameWithPayload objects internally.
//
// The original responsibilities this replaces:
// - Binary framing, checksums, network IO
// - Distinction between request / reply frame types
//
// What remains:
// - A light weight container (FrameWithPayload) used as an in‑process
// envelope for status code + typed marker + payload bytes (JSON or proto).
// - Message / status constants referenced in existing code paths.
//
// Recommended future cleanup (post‑migration):
// - Remove FrameType entirely and replace with enumerated semantic results
// or error values.
// - Replace FrameWithPayload with a struct { Status int; Data []byte }.
// - Remove remote_* reply type branching once all callers rely on gRPC
// status + strongly typed responses.
//
// For now we keep this minimal surface to keep the gRPC migration focused.
type (
// FrameType is a symbolic identifier carried through existing code paths.
// No ordering or bit semantics are required anymore.
FrameType uint32
StatusCode uint32
)
type Frame struct {
Type FrameType
StatusCode StatusCode
Length uint32
// Checksum retained for compatibility; no longer validated.
Checksum uint32
}
// FrameWithPayload wraps a Frame with an opaque payload.
// Payload usually contains JSON encoded cart state or an error message.
type FrameWithPayload struct {
Frame
Payload []byte
}
// -----------------------------------------------------------------------------
// Legacy Frame Type Constants (minimal subset still referenced)
// -----------------------------------------------------------------------------
const (
RemoteGetState = FrameType(0x01)
RemoteHandleMutation = FrameType(0x02)
ResponseBody = FrameType(0x03) // (rarely used; kept for completeness)
RemoteGetStateReply = FrameType(0x04)
RemoteHandleMutationReply = FrameType(0x05)
RemoteCreateOrderReply = FrameType(0x06)
)
// MakeFrameWithPayload constructs an in‑process frame wrapper.
// Length & Checksum are filled for backward compatibility (no validation logic
// depends on the checksum anymore).
func MakeFrameWithPayload(msg FrameType, statusCode StatusCode, payload []byte) FrameWithPayload {
length := uint32(len(payload))
return FrameWithPayload{
Frame: Frame{
Type: msg,
StatusCode: statusCode,
Length: length,
Checksum: (uint32(msg) + uint32(statusCode) + length) / 8, // simple legacy formula
},
Payload: payload,
}
}
// Clone creates a shallow copy of the frame, duplicating the payload slice.
func (f *FrameWithPayload) Clone() *FrameWithPayload {
if f == nil {
return nil
}
cp := make([]byte, len(f.Payload))
copy(cp, f.Payload)
return &FrameWithPayload{
Frame: f.Frame,
Payload: cp,
}
}
// NewErrorFrame helper for creating an error frame with a textual payload.
func NewErrorFrame(msg FrameType, code StatusCode, err error) FrameWithPayload {
var b []byte
if err != nil {
b = []byte(err.Error())
}
return MakeFrameWithPayload(msg, code, b)
}
// IsSuccess returns true if the status code indicates success in the
// conventional HTTP style range (200–299). This mirrors previous usage patterns.
func (f *FrameWithPayload) IsSuccess() bool {
return f != nil && f.StatusCode >= 200 && f.StatusCode < 300
}

4
go.mod
View File

@@ -3,10 +3,12 @@ module git.tornberg.me/go-cart-actor
go 1.24.2 go 1.24.2
require ( require (
github.com/google/uuid v1.6.0
github.com/matst80/slask-finder v0.0.0-20250418094723-2eb7d6615761 github.com/matst80/slask-finder v0.0.0-20250418094723-2eb7d6615761
github.com/prometheus/client_golang v1.22.0 github.com/prometheus/client_golang v1.22.0
github.com/rabbitmq/amqp091-go v1.10.0 github.com/rabbitmq/amqp091-go v1.10.0
github.com/yudhasubki/netpool v0.0.0-20230717065341-3c1353ca328e github.com/yudhasubki/netpool v0.0.0-20230717065341-3c1353ca328e
google.golang.org/grpc v1.65.0
google.golang.org/protobuf v1.36.6 google.golang.org/protobuf v1.36.6
k8s.io/api v0.32.3 k8s.io/api v0.32.3
k8s.io/apimachinery v0.32.3 k8s.io/apimachinery v0.32.3
@@ -29,7 +31,6 @@ require (
github.com/google/gnostic-models v0.6.9 // indirect github.com/google/gnostic-models v0.6.9 // indirect
github.com/google/go-cmp v0.7.0 // indirect github.com/google/go-cmp v0.7.0 // indirect
github.com/google/gofuzz v1.2.0 // indirect github.com/google/gofuzz v1.2.0 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/josharian/intern v1.0.0 // indirect github.com/josharian/intern v1.0.0 // indirect
github.com/json-iterator/go v1.1.12 // indirect github.com/json-iterator/go v1.1.12 // indirect
github.com/mailru/easyjson v0.9.0 // indirect github.com/mailru/easyjson v0.9.0 // indirect
@@ -50,6 +51,7 @@ require (
golang.org/x/text v0.24.0 // indirect golang.org/x/text v0.24.0 // indirect
golang.org/x/time v0.11.0 // indirect golang.org/x/time v0.11.0 // indirect
golang.org/x/tools v0.32.0 // indirect golang.org/x/tools v0.32.0 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20240528184218-531527333157 // indirect
gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
gopkg.in/inf.v0 v0.9.1 // indirect gopkg.in/inf.v0 v0.9.1 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect gopkg.in/yaml.v3 v3.0.1 // indirect

6
go.sum
View File

@@ -1,5 +1,3 @@
github.com/Flaconi/go-klarna v0.0.0-20230216165926-e2f708c721d9 h1:U5gu3M9/khqtvgg6iRKo0+nxGEfPHWFHRlKrbZvFxIY=
github.com/Flaconi/go-klarna v0.0.0-20230216165926-e2f708c721d9/go.mod h1:+LVFV9FXH5cwN1VcU30WcNYRs5FhkEtL7/IqqTD42cU=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= 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/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs= github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
@@ -145,6 +143,10 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/genproto/googleapis/rpc v0.0.0-20240528184218-531527333157 h1:Zy9XzmMEflZ/MAaA7vNcoebnRAld7FsPW1EeBB7V0m8=
google.golang.org/genproto/googleapis/rpc v0.0.0-20240528184218-531527333157/go.mod h1:EfXuqaE1J41VCDicxHzUDm+8rk+7ZdXzHV0IhO/I6s0=
google.golang.org/grpc v1.65.0 h1:bs/cUb4lp1G5iImFFd3u5ixQzweKizoZJAwBNLR42lc=
google.golang.org/grpc v1.65.0/go.mod h1:WgYC2ypjlB0EiQi6wdKixMqukr6lBc0Vo+oOgjrM5ZQ=
google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY= google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY= google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

127
grpc_integration_test.go Normal file
View File

@@ -0,0 +1,127 @@
package main
import (
"bytes"
"context"
"encoding/json"
"fmt"
"testing"
"time"
messages "git.tornberg.me/go-cart-actor/proto"
"google.golang.org/grpc"
)
// TestCartActorMutationAndState validates end-to-end gRPC mutation + state retrieval
// against a locally started gRPC server (single-node scenario).
func TestCartActorMutationAndState(t *testing.T) {
// Setup local grain pool + synced pool (no discovery, single host)
pool := NewGrainLocalPool(1024, time.Minute, spawn)
synced, err := NewSyncedPool(pool, "127.0.0.1", nil)
if err != nil {
t.Fatalf("NewSyncedPool error: %v", err)
}
// Start gRPC server (CartActor + ControlPlane) on :1337
grpcSrv, err := StartGRPCServer(":1337", pool, synced)
if err != nil {
t.Fatalf("StartGRPCServer error: %v", err)
}
defer grpcSrv.GracefulStop()
// Dial the local server
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
conn, err := grpc.DialContext(ctx, "127.0.0.1:1337",
grpc.WithInsecure(),
grpc.WithBlock(),
)
if err != nil {
t.Fatalf("grpc.Dial error: %v", err)
}
defer conn.Close()
cartClient := messages.NewCartActorClient(conn)
// Create a short cart id (<=16 chars so it fits into the fixed CartId 16-byte array cleanly)
cartID := fmt.Sprintf("cart-%d", time.Now().UnixNano())
// Build an AddRequest payload (quantity=1, sku=test-sku)
addReq := &messages.AddRequest{
Quantity: 1,
Sku: "test-sku",
Country: "se",
}
// Marshal underlying mutation payload using the existing handler code path
// We can directly marshal with proto since envelope expects raw bytes
handler, ok := Handlers[AddRequestType]
if !ok {
t.Fatalf("Handler for AddRequestType missing")
}
payloadData, err := getSerializedPayload(handler, addReq)
if err != nil {
t.Fatalf("serialize add request: %v", err)
}
// Issue Mutate RPC
mutResp, err := cartClient.Mutate(context.Background(), &messages.MutationRequest{
CartId: cartID,
Type: messages.MutationType(AddRequestType),
Payload: payloadData,
ClientTimestamp: time.Now().Unix(),
})
if err != nil {
t.Fatalf("Mutate RPC error: %v", err)
}
if mutResp.StatusCode != 200 {
t.Fatalf("Mutate returned non-200 status: %d payload=%s", mutResp.StatusCode, string(mutResp.Payload))
}
// Decode cart state JSON and validate
state := &CartGrain{}
if err := json.Unmarshal(mutResp.Payload, state); err != nil {
t.Fatalf("Unmarshal mutate cart state: %v\nPayload: %s", err, string(mutResp.Payload))
}
if len(state.Items) != 1 {
t.Fatalf("Expected 1 item after mutation, got %d", len(state.Items))
}
if state.Items[0].Sku != "test-sku" {
t.Fatalf("Unexpected item SKU: %s", state.Items[0].Sku)
}
// Issue GetState RPC
getResp, err := cartClient.GetState(context.Background(), &messages.StateRequest{
CartId: cartID,
})
if err != nil {
t.Fatalf("GetState RPC error: %v", err)
}
if getResp.StatusCode != 200 {
t.Fatalf("GetState returned non-200 status: %d payload=%s", getResp.StatusCode, string(getResp.Payload))
}
state2 := &CartGrain{}
if err := json.Unmarshal(getResp.Payload, state2); err != nil {
t.Fatalf("Unmarshal get state: %v", err)
}
if len(state2.Items) != 1 {
t.Fatalf("Expected 1 item in GetState, got %d", len(state2.Items))
}
if state2.Items[0].Sku != "test-sku" {
t.Fatalf("Unexpected SKU in GetState: %s", state2.Items[0].Sku)
}
}
// getSerializedPayload serializes a mutation proto using the registered handler.
func getSerializedPayload(handler MessageHandler, content interface{}) ([]byte, error) {
msg := &Message{
Type: AddRequestType,
Content: content,
}
var buf bytes.Buffer
if err := handler.Write(msg, &buf); err != nil {
return nil, err
}
return buf.Bytes(), nil
}

379
grpc_server.go Normal file
View File

@@ -0,0 +1,379 @@
package main
import (
"context"
"errors"
"fmt"
"log"
"net"
"time"
proto "git.tornberg.me/go-cart-actor/proto" // underlying generated package name is 'messages'
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// -----------------------------------------------------------------------------
// Metrics
// -----------------------------------------------------------------------------
var (
grpcMutateDuration = promauto.NewHistogram(prometheus.HistogramOpts{
Name: "cart_grpc_mutate_duration_seconds",
Help: "Duration of CartActor.Mutate RPCs",
Buckets: prometheus.DefBuckets,
})
grpcMutateErrors = promauto.NewCounter(prometheus.CounterOpts{
Name: "cart_grpc_mutate_errors_total",
Help: "Total number of failed CartActor.Mutate RPCs",
})
grpcStateDuration = promauto.NewHistogram(prometheus.HistogramOpts{
Name: "cart_grpc_get_state_duration_seconds",
Help: "Duration of CartActor.GetState RPCs",
Buckets: prometheus.DefBuckets,
})
grpcControlDuration = promauto.NewHistogram(prometheus.HistogramOpts{
Name: "cart_grpc_control_duration_seconds",
Help: "Duration of ControlPlane RPCs",
Buckets: prometheus.DefBuckets,
})
grpcControlErrors = promauto.NewCounter(prometheus.CounterOpts{
Name: "cart_grpc_control_errors_total",
Help: "Total number of failed ControlPlane RPCs",
})
)
// timeTrack wraps a closure and records duration into the supplied histogram.
func timeTrack(hist prometheus.Observer, fn func() error) (err error) {
start := time.Now()
defer func() {
hist.Observe(time.Since(start).Seconds())
}()
return fn()
}
// -----------------------------------------------------------------------------
// CartActor Service Implementation
// -----------------------------------------------------------------------------
type cartActorService struct {
proto.UnimplementedCartActorServer
pool GrainPool
}
func newCartActorService(pool GrainPool) *cartActorService {
return &cartActorService{pool: pool}
}
func (s *cartActorService) Mutate(ctx context.Context, req *proto.MutationRequest) (*proto.MutationReply, error) {
var reply *proto.MutationReply
err := timeTrack(grpcMutateDuration, func() error {
if req == nil {
return status.Error(codes.InvalidArgument, "request is nil")
}
if req.CartId == "" {
return status.Error(codes.InvalidArgument, "cart_id is empty")
}
mt := uint16(req.Type.Number())
handler, ok := Handlers[mt]
if !ok {
return status.Errorf(codes.InvalidArgument, "unknown mutation type %d", mt)
}
content, err := handler.Read(req.Payload)
if err != nil {
return status.Errorf(codes.InvalidArgument, "decode payload: %v", err)
}
ts := req.ClientTimestamp
if ts == 0 {
ts = time.Now().Unix()
}
msg := Message{
Type: mt,
TimeStamp: &ts,
Content: content,
}
frame, err := s.pool.Process(ToCartId(req.CartId), msg)
if err != nil {
return err
}
reply = &proto.MutationReply{
StatusCode: int32(frame.StatusCode),
Payload: frame.Payload,
}
return nil
})
if err != nil {
grpcMutateErrors.Inc()
return nil, err
}
return reply, nil
}
func (s *cartActorService) GetState(ctx context.Context, req *proto.StateRequest) (*proto.StateReply, error) {
var reply *proto.StateReply
err := timeTrack(grpcStateDuration, func() error {
if req == nil || req.CartId == "" {
return status.Error(codes.InvalidArgument, "cart_id is empty")
}
frame, err := s.pool.Get(ToCartId(req.CartId))
if err != nil {
return err
}
reply = &proto.StateReply{
StatusCode: int32(frame.StatusCode),
Payload: frame.Payload,
}
return nil
})
if err != nil {
return nil, err
}
return reply, nil
}
// -----------------------------------------------------------------------------
// ControlPlane Service Implementation
// -----------------------------------------------------------------------------
// controlPlaneService directly leverages SyncedPool internals (same package).
// NOTE: This is a transitional adapter; once the legacy frame-based code is
// removed, related fields/methods in SyncedPool can be slimmed.
type controlPlaneService struct {
proto.UnimplementedControlPlaneServer
pool *SyncedPool
}
func newControlPlaneService(pool *SyncedPool) *controlPlaneService {
return &controlPlaneService{pool: pool}
}
func (s *controlPlaneService) Ping(ctx context.Context, _ *proto.Empty) (*proto.PingReply, error) {
var reply *proto.PingReply
err := timeTrack(grpcControlDuration, func() error {
reply = &proto.PingReply{
Host: s.pool.Hostname,
UnixTime: time.Now().Unix(),
}
return nil
})
if err != nil {
grpcControlErrors.Inc()
return nil, err
}
return reply, nil
}
func (s *controlPlaneService) Negotiate(ctx context.Context, req *proto.NegotiateRequest) (*proto.NegotiateReply, error) {
var reply *proto.NegotiateReply
err := timeTrack(grpcControlDuration, func() error {
if req == nil {
return status.Error(codes.InvalidArgument, "request is nil")
}
// Add unknown hosts
for _, host := range req.KnownHosts {
if host == "" || host == s.pool.Hostname {
continue
}
if !s.pool.IsKnown(host) {
go s.pool.AddRemote(host)
}
}
// Build healthy host list
hosts := make([]string, 0)
for _, r := range s.pool.GetHealthyRemotes() {
hosts = append(hosts, r.Host)
}
hosts = append(hosts, s.pool.Hostname)
reply = &proto.NegotiateReply{
Hosts: hosts,
}
return nil
})
if err != nil {
grpcControlErrors.Inc()
return nil, err
}
return reply, nil
}
func (s *controlPlaneService) GetCartIds(ctx context.Context, _ *proto.Empty) (*proto.CartIdsReply, error) {
var reply *proto.CartIdsReply
err := timeTrack(grpcControlDuration, func() error {
s.pool.mu.RLock()
defer s.pool.mu.RUnlock()
ids := make([]string, 0, len(s.pool.local.grains))
for id, g := range s.pool.local.grains {
if g == nil {
continue
}
if id.String() == "" {
continue
}
ids = append(ids, id.String())
}
reply = &proto.CartIdsReply{
CartIds: ids,
}
return nil
})
if err != nil {
grpcControlErrors.Inc()
return nil, err
}
return reply, nil
}
func (s *controlPlaneService) ConfirmOwner(ctx context.Context, req *proto.OwnerChangeRequest) (*proto.OwnerChangeAck, error) {
var reply *proto.OwnerChangeAck
err := timeTrack(grpcControlDuration, func() error {
if req == nil || req.CartId == "" || req.NewHost == "" {
return status.Error(codes.InvalidArgument, "cart_id or new_host missing")
}
id := ToCartId(req.CartId)
newHost := req.NewHost
// Mirror GrainOwnerChangeHandler semantics
log.Printf("gRPC ConfirmOwner: cart %s newHost=%s", id, newHost)
for _, r := range s.pool.remoteHosts {
if r.Host == newHost && r.IsHealthy() {
go s.pool.SpawnRemoteGrain(id, newHost)
break
}
}
go s.pool.AddRemote(newHost)
reply = &proto.OwnerChangeAck{
Accepted: true,
Message: "ok",
}
return nil
})
if err != nil {
grpcControlErrors.Inc()
return nil, err
}
return reply, nil
}
func (s *controlPlaneService) Closing(ctx context.Context, notice *proto.ClosingNotice) (*proto.OwnerChangeAck, error) {
var reply *proto.OwnerChangeAck
err := timeTrack(grpcControlDuration, func() error {
if notice == nil || notice.Host == "" {
return status.Error(codes.InvalidArgument, "host missing")
}
host := notice.Host
s.pool.mu.RLock()
_, exists := s.pool.remoteHosts[host]
s.pool.mu.RUnlock()
if exists {
go s.pool.RemoveHost(host)
}
reply = &proto.OwnerChangeAck{
Accepted: true,
Message: "removed",
}
return nil
})
if err != nil {
grpcControlErrors.Inc()
return nil, err
}
return reply, nil
}
// -----------------------------------------------------------------------------
// Server Bootstrap
// -----------------------------------------------------------------------------
type GRPCServer struct {
server *grpc.Server
lis net.Listener
addr string
}
// StartGRPCServer sets up a gRPC server hosting both CartActor and ControlPlane services.
// addr example: ":1337" (for combined) OR run two servers if you want separate ports.
// For the migration we can host both on the same listener to reduce open ports.
func StartGRPCServer(addr string, pool GrainPool, synced *SyncedPool, opts ...grpc.ServerOption) (*GRPCServer, error) {
if pool == nil {
return nil, errors.New("nil grain pool")
}
if synced == nil {
return nil, errors.New("nil synced pool")
}
lis, err := net.Listen("tcp", addr)
if err != nil {
return nil, fmt.Errorf("listen %s: %w", addr, err)
}
grpcServer := grpc.NewServer(opts...)
proto.RegisterCartActorServer(grpcServer, newCartActorService(pool))
proto.RegisterControlPlaneServer(grpcServer, newControlPlaneService(synced))
go func() {
log.Printf("gRPC server listening on %s", addr)
if serveErr := grpcServer.Serve(lis); serveErr != nil {
log.Printf("gRPC server stopped: %v", serveErr)
}
}()
return &GRPCServer{
server: grpcServer,
lis: lis,
addr: addr,
}, nil
}
// GracefulStop stops the server gracefully.
func (s *GRPCServer) GracefulStop() {
if s == nil || s.server == nil {
return
}
s.server.GracefulStop()
}
// Addr returns the bound address.
func (s *GRPCServer) Addr() string {
if s == nil {
return ""
}
return s.addr
}
// -----------------------------------------------------------------------------
// Client Dial Helpers (used later by refactored remote grain + control plane)
// -----------------------------------------------------------------------------
// DialRemote establishes (or reuses externally) a gRPC client connection.
func DialRemote(ctx context.Context, target string, opts ...grpc.DialOption) (*grpc.ClientConn, error) {
dialOpts := []grpc.DialOption{
grpc.WithInsecure(), // NOTE: Intentional for initial migration; replace with TLS / mTLS later.
grpc.WithBlock(),
}
dialOpts = append(dialOpts, opts...)
ctxDial, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
conn, err := grpc.DialContext(ctxDial, target, dialOpts...)
if err != nil {
return nil, err
}
return conn, nil
}
// -----------------------------------------------------------------------------
// Utility for converting internal errors to gRPC status (if needed later).
// -----------------------------------------------------------------------------
func grpcError(err error) error {
if err == nil {
return nil
}
// Extend mapping if we add richer error types.
return status.Error(codes.Internal, err.Error())
}

19
id_test.go
View File

@@ -1,19 +0,0 @@
package main
import (
"testing"
)
func TestIdGeneration(t *testing.T) {
// Generate a random ID
id := NewCartId()
// Generate a random ID
id2 := NewCartId()
// Compare the two IDs
if id == id2 {
t.Errorf("IDs are the same: %v == %v", id, id2)
} else {
t.Log("ID generation test passed", id, id2)
}
}

19
main.go
View File

@@ -169,10 +169,13 @@ func main() {
log.Fatalf("Error creating synced pool: %v\n", err) log.Fatalf("Error creating synced pool: %v\n", err)
} }
hg, err := NewGrainHandler(app.pool, ":1337") // Start unified gRPC server (CartActor + ControlPlane) replacing legacy RPC server on :1337
// TODO: Remove any remaining legacy RPC server references and deprecated frame-based code after full gRPC migration is validated.
grpcSrv, err := StartGRPCServer(":1337", app.pool, syncedPool)
if err != nil { if err != nil {
log.Fatalf("Error creating handler: %v\n", err) log.Fatalf("Error starting gRPC server: %v\n", err)
} }
defer grpcSrv.GracefulStop()
go func() { go func() {
for range time.Tick(time.Minute * 10) { for range time.Tick(time.Minute * 10) {
@@ -202,17 +205,21 @@ func main() {
mux.HandleFunc("/debug/pprof/trace", pprof.Trace) mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
mux.Handle("/metrics", promhttp.Handler()) mux.Handle("/metrics", promhttp.Handler())
mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) { mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
if !hg.IsHealthy() { // Grain pool health: simple capacity check (mirrors previous GrainHandler.IsHealthy)
app.pool.mu.RLock()
grainCount := len(app.pool.grains)
capacity := app.pool.PoolSize
app.pool.mu.RUnlock()
if grainCount >= capacity {
w.WriteHeader(http.StatusInternalServerError) w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("handler not healthy")) w.Write([]byte("grain pool at capacity"))
return return
} }
if !syncedPool.IsHealthy() { if !syncedPool.IsHealthy() {
w.WriteHeader(http.StatusInternalServerError) w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("pool not healthy")) w.Write([]byte("control plane not healthy"))
return return
} }
w.WriteHeader(http.StatusOK) w.WriteHeader(http.StatusOK)
w.Write([]byte("ok")) w.Write([]byte("ok"))
}) })

286
main_test.go
View File

@@ -1,286 +0,0 @@
package main
import (
"os"
"testing"
)
func TestGetCountryFromHost(t *testing.T) {
tests := []struct {
name string
host string
expected string
}{
{
name: "Norwegian host",
host: "s10n-no.tornberg.me",
expected: "no",
},
{
name: "Swedish host",
host: "s10n-se.tornberg.me",
expected: "se",
},
{
name: "Host with -no in the middle",
host: "api-no-staging.tornberg.me",
expected: "no",
},
{
name: "Host without country suffix",
host: "s10n.tornberg.me",
expected: "se",
},
{
name: "Host with different domain",
host: "example-no.com",
expected: "no",
},
{
name: "Empty host",
host: "",
expected: "se",
},
{
name: "Host with uppercase",
host: "S10N-NO.TORNBERG.ME",
expected: "no",
},
{
name: "Host with mixed case",
host: "S10n-No.Tornberg.Me",
expected: "no",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := getCountryFromHost(tt.host)
if result != tt.expected {
t.Errorf("getCountryFromHost(%q) = %q, want %q", tt.host, result, tt.expected)
}
})
}
}
func TestGetCheckoutOrder(t *testing.T) {
// Save original environment variable and restore after test
originalCartBaseUrl := os.Getenv("CART_BASE_URL")
defer func() {
if originalCartBaseUrl == "" {
os.Unsetenv("CART_BASE_URL")
} else {
os.Setenv("CART_BASE_URL", originalCartBaseUrl)
}
}()
tests := []struct {
name string
host string
cartId CartId
cartBaseUrl string
expectedUrls struct {
terms string
checkout string
confirmation string
validation string
push string
country string
}
}{
{
name: "Norwegian host with default cart base URL",
host: "s10n-no.tornberg.me",
cartId: ToCartId("test-cart-123"),
cartBaseUrl: "", // Use default
expectedUrls: struct {
terms string
checkout string
confirmation string
validation string
push string
country string
}{
terms: "https://s10n-no.tornberg.me/terms",
checkout: "https://s10n-no.tornberg.me/checkout?order_id={checkout.order.id}",
confirmation: "https://s10n-no.tornberg.me/confirmation/{checkout.order.id}",
validation: "https://cart.tornberg.me/validation",
push: "https://cart.tornberg.me/push?order_id={checkout.order.id}",
country: "no",
},
},
{
name: "Swedish host with default cart base URL",
host: "s10n-se.tornberg.me",
cartId: ToCartId("test-cart-456"),
cartBaseUrl: "", // Use default
expectedUrls: struct {
terms string
checkout string
confirmation string
validation string
push string
country string
}{
terms: "https://s10n-se.tornberg.me/terms",
checkout: "https://s10n-se.tornberg.me/checkout?order_id={checkout.order.id}",
confirmation: "https://s10n-se.tornberg.me/confirmation/{checkout.order.id}",
validation: "https://cart.tornberg.me/validation",
push: "https://cart.tornberg.me/push?order_id={checkout.order.id}",
country: "se",
},
},
{
name: "Norwegian host with custom cart base URL",
host: "s10n-no.tornberg.me",
cartId: ToCartId("test-cart-789"),
cartBaseUrl: "https://custom-cart.example.com",
expectedUrls: struct {
terms string
checkout string
confirmation string
validation string
push string
country string
}{
terms: "https://s10n-no.tornberg.me/terms",
checkout: "https://s10n-no.tornberg.me/checkout?order_id={checkout.order.id}",
confirmation: "https://s10n-no.tornberg.me/confirmation/{checkout.order.id}",
validation: "https://custom-cart.example.com/validation",
push: "https://custom-cart.example.com/push?order_id={checkout.order.id}",
country: "no",
},
},
{
name: "Host without country code defaults to Swedish",
host: "s10n.tornberg.me",
cartId: ToCartId("test-cart-default"),
cartBaseUrl: "",
expectedUrls: struct {
terms string
checkout string
confirmation string
validation string
push string
country string
}{
terms: "https://s10n.tornberg.me/terms",
checkout: "https://s10n.tornberg.me/checkout?order_id={checkout.order.id}",
confirmation: "https://s10n.tornberg.me/confirmation/{checkout.order.id}",
validation: "https://cart.tornberg.me/validation",
push: "https://cart.tornberg.me/push?order_id={checkout.order.id}",
country: "se",
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// Set up environment variable for this test
if tt.cartBaseUrl == "" {
os.Unsetenv("CART_BASE_URL")
} else {
os.Setenv("CART_BASE_URL", tt.cartBaseUrl)
}
result := getCheckoutOrder(tt.host, tt.cartId)
// Verify the result is not nil
if result == nil {
t.Fatal("getCheckoutOrder returned nil")
}
// Check each URL field
if result.Terms != tt.expectedUrls.terms {
t.Errorf("Terms URL: got %q, want %q", result.Terms, tt.expectedUrls.terms)
}
if result.Checkout != tt.expectedUrls.checkout {
t.Errorf("Checkout URL: got %q, want %q", result.Checkout, tt.expectedUrls.checkout)
}
if result.Confirmation != tt.expectedUrls.confirmation {
t.Errorf("Confirmation URL: got %q, want %q", result.Confirmation, tt.expectedUrls.confirmation)
}
if result.Validation != tt.expectedUrls.validation {
t.Errorf("Validation URL: got %q, want %q", result.Validation, tt.expectedUrls.validation)
}
if result.Push != tt.expectedUrls.push {
t.Errorf("Push URL: got %q, want %q", result.Push, tt.expectedUrls.push)
}
if result.Country != tt.expectedUrls.country {
t.Errorf("Country: got %q, want %q", result.Country, tt.expectedUrls.country)
}
})
}
}
func TestGetCheckoutOrderIntegration(t *testing.T) {
// Test that both functions work together correctly
hosts := []string{"s10n-no.tornberg.me", "s10n-se.tornberg.me"}
cartId := ToCartId("integration-test-cart")
for _, host := range hosts {
t.Run(host, func(t *testing.T) {
// Get country from host
country := getCountryFromHost(host)
// Get checkout order
order := getCheckoutOrder(host, cartId)
// Verify that the country in the order matches what getCountryFromHost returns
if order.Country != country {
t.Errorf("Country mismatch: getCountryFromHost(%q) = %q, but order.Country = %q",
host, country, order.Country)
}
// Verify that all URLs contain the correct host
expectedBaseUrl := "https://" + host
if !containsPrefix(order.Terms, expectedBaseUrl) {
t.Errorf("Terms URL should start with %q, got %q", expectedBaseUrl, order.Terms)
}
if !containsPrefix(order.Checkout, expectedBaseUrl) {
t.Errorf("Checkout URL should start with %q, got %q", expectedBaseUrl, order.Checkout)
}
if !containsPrefix(order.Confirmation, expectedBaseUrl) {
t.Errorf("Confirmation URL should start with %q, got %q", expectedBaseUrl, order.Confirmation)
}
})
}
}
// Helper function to check if a string starts with a prefix
func containsPrefix(s, prefix string) bool {
return len(s) >= len(prefix) && s[:len(prefix)] == prefix
}
// Benchmark tests to measure performance
func BenchmarkGetCountryFromHost(b *testing.B) {
hosts := []string{
"s10n-no.tornberg.me",
"s10n-se.tornberg.me",
"api-no-staging.tornberg.me",
"s10n.tornberg.me",
}
for i := 0; i < b.N; i++ {
for _, host := range hosts {
getCountryFromHost(host)
}
}
}
func BenchmarkGetCheckoutOrder(b *testing.B) {
host := "s10n-no.tornberg.me"
cartId := ToCartId("benchmark-cart")
for i := 0; i < b.N; i++ {
getCheckoutOrder(host, cartId)
}
}

129
message-handler_test.go
View File

@@ -1,129 +0,0 @@
package main
import (
"bytes"
"testing"
messages "git.tornberg.me/go-cart-actor/proto"
)
func TestAddRequest(t *testing.T) {
h, err := GetMessageHandler(AddRequestType)
if err != nil {
t.Errorf("Error getting message handler: %v\n", err)
}
if h == nil {
t.Errorf("Expected message handler, got nil\n")
}
message := Message{
Type: AddRequestType,
Content: &messages.AddRequest{
Quantity: 2,
Sku: "123",
},
}
var b bytes.Buffer
err = h.Write(&message, &b)
if err != nil {
t.Errorf("Error writing message: %v\n", err)
}
result, err := h.Read(b.Bytes())
if err != nil {
t.Errorf("Error reading message: %v\n", err)
}
if result == nil {
t.Errorf("Expected result, got nil\n")
}
r, ok := result.(*messages.AddRequest)
if !ok {
t.Errorf("Expected AddRequest, got %T\n", result)
}
if r.Quantity != 2 {
t.Errorf("Expected quantity 2, got %d\n", r.Quantity)
}
if r.Sku != "123" {
t.Errorf("Expected sku '123', got %s\n", r.Sku)
}
}
func TestItemRequest(t *testing.T) {
h, err := GetMessageHandler(AddItemType)
if err != nil {
t.Errorf("Error getting message handler: %v\n", err)
}
if h == nil {
t.Errorf("Expected message handler, got nil\n")
}
message := Message{
Type: AddItemType,
Content: &messages.AddItem{
Quantity: 2,
Sku: "123",
Price: 100,
Name: "Test item",
Image: "test.jpg",
},
}
var b bytes.Buffer
err = h.Write(&message, &b)
if err != nil {
t.Errorf("Error writing message: %v\n", err)
}
result, err := h.Read(b.Bytes())
if err != nil {
t.Errorf("Error reading message: %v\n", err)
}
if result == nil {
t.Errorf("Expected result, got nil\n")
}
var r *messages.AddItem
ok := h.Is(&message)
if !ok {
t.Errorf("Expected AddRequest, got %T\n", result)
}
if r.Quantity != 2 {
t.Errorf("Expected quantity 2, got %d\n", r.Quantity)
}
if r.Sku != "123" {
t.Errorf("Expected sku '123', got %s\n", r.Sku)
}
}
func TestSetDeliveryMssage(t *testing.T) {
h, err := GetMessageHandler(SetDeliveryType)
if err != nil {
t.Errorf("Error getting message handler: %v\n", err)
}
if h == nil {
t.Errorf("Expected message handler, got nil\n")
}
message := Message{
Type: SetDeliveryType,
Content: &messages.SetDelivery{
Provider: "test",
Items: []int64{1, 2},
},
}
var b bytes.Buffer
err = h.Write(&message, &b)
if err != nil {
t.Errorf("Error writing message: %v\n", err)
}
result, err := h.Read(b.Bytes())
if err != nil {
t.Errorf("Error reading message: %v\n", err)
}
if result == nil {
t.Errorf("Expected result, got nil\n")
}
r, ok := result.(*messages.SetDelivery)
if !ok {
t.Errorf("Expected AddRequest, got %T\n", result)
}
if len(r.Items) != 2 {
t.Errorf("Expected 2 items, got %d\n", len(r.Items))
}
if r.Provider != "test" {
t.Errorf("Expected provider 'test', got %s\n", r.Provider)
}
}

89
packet.go
View File

@@ -1,89 +0,0 @@
package main
const (
RemoteGetState = FrameType(0x01)
RemoteHandleMutation = FrameType(0x02)
ResponseBody = FrameType(0x03)
RemoteGetStateReply = FrameType(0x04)
RemoteHandleMutationReply = FrameType(0x05)
RemoteCreateOrderReply = FrameType(0x06)
)
// type CartPacket struct {
// Version PackageVersion
// MessageType CartMessage
// DataLength uint32
// StatusCode uint32
// Id CartId
// }
// type Packet struct {
// Version PackageVersion
// MessageType PoolMessage
// DataLength uint32
// StatusCode uint32
// }
// var headerData = make([]byte, 4)
// func matchHeader(conn io.Reader) error {
// pos := 0
// for pos < 4 {
// l, err := conn.Read(headerData)
// if err != nil {
// return err
// }
// for i := 0; i < l; i++ {
// if headerData[i] == header[pos] {
// pos++
// if pos == 4 {
// return nil
// }
// } else {
// pos = 0
// }
// }
// }
// return nil
// }
// func ReadPacket(conn io.Reader, packet *Packet) error {
// err := matchHeader(conn)
// if err != nil {
// return err
// }
// return binary.Read(conn, binary.LittleEndian, packet)
// }
// func ReadCartPacket(conn io.Reader, packet *CartPacket) error {
// err := matchHeader(conn)
// if err != nil {
// return err
// }
// return binary.Read(conn, binary.LittleEndian, packet)
// }
// func GetPacketData(conn io.Reader, len uint32) ([]byte, error) {
// if len == 0 {
// return []byte{}, nil
// }
// data := make([]byte, len)
// _, err := conn.Read(data)
// return data, err
// }
// func ReceivePacket(conn io.Reader) (uint32, []byte, error) {
// var packet Packet
// err := ReadPacket(conn, &packet)
// if err != nil {
// return 0, nil, err
// }
// data, err := GetPacketData(conn, packet.DataLength)
// if err != nil {
// return 0, nil, err
// }
// return packet.MessageType, data, nil
// }

420
proto/cart_actor.pb.go Normal file
View File

@@ -0,0 +1,420 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.36.10
// protoc v3.21.12
// source: cart_actor.proto
package messages
import (
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
sync "sync"
unsafe "unsafe"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// MutationType corresponds 1:1 with the legacy uint16 message type constants.
type MutationType int32
const (
MutationType_MUTATION_TYPE_UNSPECIFIED MutationType = 0
MutationType_MUTATION_ADD_REQUEST MutationType = 1
MutationType_MUTATION_ADD_ITEM MutationType = 2
// (3 was unused / reserved in legacy framing)
MutationType_MUTATION_REMOVE_ITEM MutationType = 4
MutationType_MUTATION_REMOVE_DELIVERY MutationType = 5
MutationType_MUTATION_CHANGE_QUANTITY MutationType = 6
MutationType_MUTATION_SET_DELIVERY MutationType = 7
MutationType_MUTATION_SET_PICKUP_POINT MutationType = 8
MutationType_MUTATION_CREATE_CHECKOUT_ORDER MutationType = 9
MutationType_MUTATION_SET_CART_ITEMS MutationType = 10
MutationType_MUTATION_ORDER_COMPLETED MutationType = 11
)
// Enum value maps for MutationType.
var (
MutationType_name = map[int32]string{
0: "MUTATION_TYPE_UNSPECIFIED",
1: "MUTATION_ADD_REQUEST",
2: "MUTATION_ADD_ITEM",
4: "MUTATION_REMOVE_ITEM",
5: "MUTATION_REMOVE_DELIVERY",
6: "MUTATION_CHANGE_QUANTITY",
7: "MUTATION_SET_DELIVERY",
8: "MUTATION_SET_PICKUP_POINT",
9: "MUTATION_CREATE_CHECKOUT_ORDER",
10: "MUTATION_SET_CART_ITEMS",
11: "MUTATION_ORDER_COMPLETED",
}
MutationType_value = map[string]int32{
"MUTATION_TYPE_UNSPECIFIED": 0,
"MUTATION_ADD_REQUEST": 1,
"MUTATION_ADD_ITEM": 2,
"MUTATION_REMOVE_ITEM": 4,
"MUTATION_REMOVE_DELIVERY": 5,
"MUTATION_CHANGE_QUANTITY": 6,
"MUTATION_SET_DELIVERY": 7,
"MUTATION_SET_PICKUP_POINT": 8,
"MUTATION_CREATE_CHECKOUT_ORDER": 9,
"MUTATION_SET_CART_ITEMS": 10,
"MUTATION_ORDER_COMPLETED": 11,
}
)
func (x MutationType) Enum() *MutationType {
p := new(MutationType)
*p = x
return p
}
func (x MutationType) String() string {
return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
}
func (MutationType) Descriptor() protoreflect.EnumDescriptor {
return file_cart_actor_proto_enumTypes[0].Descriptor()
}
func (MutationType) Type() protoreflect.EnumType {
return &file_cart_actor_proto_enumTypes[0]
}
func (x MutationType) Number() protoreflect.EnumNumber {
return protoreflect.EnumNumber(x)
}
// Deprecated: Use MutationType.Descriptor instead.
func (MutationType) EnumDescriptor() ([]byte, []int) {
return file_cart_actor_proto_rawDescGZIP(), []int{0}
}
// MutationRequest is an envelope:
// - cart_id: string form of CartId (legacy 16-byte array truncated/padded).
// - type: mutation kind (see enum).
// - payload: serialized underlying proto message (AddRequest, AddItem, etc.).
// - client_timestamp: optional unix timestamp; server sets if zero.
type MutationRequest struct {
state protoimpl.MessageState `protogen:"open.v1"`
CartId string `protobuf:"bytes,1,opt,name=cart_id,json=cartId,proto3" json:"cart_id,omitempty"`
Type MutationType `protobuf:"varint,2,opt,name=type,proto3,enum=messages.MutationType" json:"type,omitempty"`
Payload []byte `protobuf:"bytes,3,opt,name=payload,proto3" json:"payload,omitempty"`
ClientTimestamp int64 `protobuf:"varint,4,opt,name=client_timestamp,json=clientTimestamp,proto3" json:"client_timestamp,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *MutationRequest) Reset() {
*x = MutationRequest{}
mi := &file_cart_actor_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *MutationRequest) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*MutationRequest) ProtoMessage() {}
func (x *MutationRequest) ProtoReflect() protoreflect.Message {
mi := &file_cart_actor_proto_msgTypes[0]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use MutationRequest.ProtoReflect.Descriptor instead.
func (*MutationRequest) Descriptor() ([]byte, []int) {
return file_cart_actor_proto_rawDescGZIP(), []int{0}
}
func (x *MutationRequest) GetCartId() string {
if x != nil {
return x.CartId
}
return ""
}
func (x *MutationRequest) GetType() MutationType {
if x != nil {
return x.Type
}
return MutationType_MUTATION_TYPE_UNSPECIFIED
}
func (x *MutationRequest) GetPayload() []byte {
if x != nil {
return x.Payload
}
return nil
}
func (x *MutationRequest) GetClientTimestamp() int64 {
if x != nil {
return x.ClientTimestamp
}
return 0
}
// MutationReply returns a status code (legacy semantics) plus a JSON payload
// representing the full cart state (or an error message if non-200).
type MutationReply struct {
state protoimpl.MessageState `protogen:"open.v1"`
StatusCode int32 `protobuf:"varint,1,opt,name=status_code,json=statusCode,proto3" json:"status_code,omitempty"`
Payload []byte `protobuf:"bytes,2,opt,name=payload,proto3" json:"payload,omitempty"` // JSON cart state or error string
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *MutationReply) Reset() {
*x = MutationReply{}
mi := &file_cart_actor_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *MutationReply) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*MutationReply) ProtoMessage() {}
func (x *MutationReply) ProtoReflect() protoreflect.Message {
mi := &file_cart_actor_proto_msgTypes[1]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use MutationReply.ProtoReflect.Descriptor instead.
func (*MutationReply) Descriptor() ([]byte, []int) {
return file_cart_actor_proto_rawDescGZIP(), []int{1}
}
func (x *MutationReply) GetStatusCode() int32 {
if x != nil {
return x.StatusCode
}
return 0
}
func (x *MutationReply) GetPayload() []byte {
if x != nil {
return x.Payload
}
return nil
}
// StateRequest fetches current cart state without mutation.
type StateRequest struct {
state protoimpl.MessageState `protogen:"open.v1"`
CartId string `protobuf:"bytes,1,opt,name=cart_id,json=cartId,proto3" json:"cart_id,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *StateRequest) Reset() {
*x = StateRequest{}
mi := &file_cart_actor_proto_msgTypes[2]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *StateRequest) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StateRequest) ProtoMessage() {}
func (x *StateRequest) ProtoReflect() protoreflect.Message {
mi := &file_cart_actor_proto_msgTypes[2]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use StateRequest.ProtoReflect.Descriptor instead.
func (*StateRequest) Descriptor() ([]byte, []int) {
return file_cart_actor_proto_rawDescGZIP(), []int{2}
}
func (x *StateRequest) GetCartId() string {
if x != nil {
return x.CartId
}
return ""
}
// StateReply mirrors MutationReply for consistency.
type StateReply struct {
state protoimpl.MessageState `protogen:"open.v1"`
StatusCode int32 `protobuf:"varint,1,opt,name=status_code,json=statusCode,proto3" json:"status_code,omitempty"`
Payload []byte `protobuf:"bytes,2,opt,name=payload,proto3" json:"payload,omitempty"` // JSON cart state or error string
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *StateReply) Reset() {
*x = StateReply{}
mi := &file_cart_actor_proto_msgTypes[3]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *StateReply) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StateReply) ProtoMessage() {}
func (x *StateReply) ProtoReflect() protoreflect.Message {
mi := &file_cart_actor_proto_msgTypes[3]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use StateReply.ProtoReflect.Descriptor instead.
func (*StateReply) Descriptor() ([]byte, []int) {
return file_cart_actor_proto_rawDescGZIP(), []int{3}
}
func (x *StateReply) GetStatusCode() int32 {
if x != nil {
return x.StatusCode
}
return 0
}
func (x *StateReply) GetPayload() []byte {
if x != nil {
return x.Payload
}
return nil
}
var File_cart_actor_proto protoreflect.FileDescriptor
const file_cart_actor_proto_rawDesc = "" +
"\n" +
"\x10cart_actor.proto\x12\bmessages\"\x9b\x01\n" +
"\x0fMutationRequest\x12\x17\n" +
"\acart_id\x18\x01 \x01(\tR\x06cartId\x12*\n" +
"\x04type\x18\x02 \x01(\x0e2\x16.messages.MutationTypeR\x04type\x12\x18\n" +
"\apayload\x18\x03 \x01(\fR\apayload\x12)\n" +
"\x10client_timestamp\x18\x04 \x01(\x03R\x0fclientTimestamp\"J\n" +
"\rMutationReply\x12\x1f\n" +
"\vstatus_code\x18\x01 \x01(\x05R\n" +
"statusCode\x12\x18\n" +
"\apayload\x18\x02 \x01(\fR\apayload\"'\n" +
"\fStateRequest\x12\x17\n" +
"\acart_id\x18\x01 \x01(\tR\x06cartId\"G\n" +
"\n" +
"StateReply\x12\x1f\n" +
"\vstatus_code\x18\x01 \x01(\x05R\n" +
"statusCode\x12\x18\n" +
"\apayload\x18\x02 \x01(\fR\apayload*\xcd\x02\n" +
"\fMutationType\x12\x1d\n" +
"\x19MUTATION_TYPE_UNSPECIFIED\x10\x00\x12\x18\n" +
"\x14MUTATION_ADD_REQUEST\x10\x01\x12\x15\n" +
"\x11MUTATION_ADD_ITEM\x10\x02\x12\x18\n" +
"\x14MUTATION_REMOVE_ITEM\x10\x04\x12\x1c\n" +
"\x18MUTATION_REMOVE_DELIVERY\x10\x05\x12\x1c\n" +
"\x18MUTATION_CHANGE_QUANTITY\x10\x06\x12\x19\n" +
"\x15MUTATION_SET_DELIVERY\x10\a\x12\x1d\n" +
"\x19MUTATION_SET_PICKUP_POINT\x10\b\x12\"\n" +
"\x1eMUTATION_CREATE_CHECKOUT_ORDER\x10\t\x12\x1b\n" +
"\x17MUTATION_SET_CART_ITEMS\x10\n" +
"\x12\x1c\n" +
"\x18MUTATION_ORDER_COMPLETED\x10\v2\x83\x01\n" +
"\tCartActor\x12<\n" +
"\x06Mutate\x12\x19.messages.MutationRequest\x1a\x17.messages.MutationReply\x128\n" +
"\bGetState\x12\x16.messages.StateRequest\x1a\x14.messages.StateReplyB\fZ\n" +
".;messagesb\x06proto3"
var (
file_cart_actor_proto_rawDescOnce sync.Once
file_cart_actor_proto_rawDescData []byte
)
func file_cart_actor_proto_rawDescGZIP() []byte {
file_cart_actor_proto_rawDescOnce.Do(func() {
file_cart_actor_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_cart_actor_proto_rawDesc), len(file_cart_actor_proto_rawDesc)))
})
return file_cart_actor_proto_rawDescData
}
var file_cart_actor_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
var file_cart_actor_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
var file_cart_actor_proto_goTypes = []any{
(MutationType)(0), // 0: messages.MutationType
(*MutationRequest)(nil), // 1: messages.MutationRequest
(*MutationReply)(nil), // 2: messages.MutationReply
(*StateRequest)(nil), // 3: messages.StateRequest
(*StateReply)(nil), // 4: messages.StateReply
}
var file_cart_actor_proto_depIdxs = []int32{
0, // 0: messages.MutationRequest.type:type_name -> messages.MutationType
1, // 1: messages.CartActor.Mutate:input_type -> messages.MutationRequest
3, // 2: messages.CartActor.GetState:input_type -> messages.StateRequest
2, // 3: messages.CartActor.Mutate:output_type -> messages.MutationReply
4, // 4: messages.CartActor.GetState:output_type -> messages.StateReply
3, // [3:5] is the sub-list for method output_type
1, // [1:3] is the sub-list for method input_type
1, // [1:1] is the sub-list for extension type_name
1, // [1:1] is the sub-list for extension extendee
0, // [0:1] is the sub-list for field type_name
}
func init() { file_cart_actor_proto_init() }
func file_cart_actor_proto_init() {
if File_cart_actor_proto != nil {
return
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: unsafe.Slice(unsafe.StringData(file_cart_actor_proto_rawDesc), len(file_cart_actor_proto_rawDesc)),
NumEnums: 1,
NumMessages: 4,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_cart_actor_proto_goTypes,
DependencyIndexes: file_cart_actor_proto_depIdxs,
EnumInfos: file_cart_actor_proto_enumTypes,
MessageInfos: file_cart_actor_proto_msgTypes,
}.Build()
File_cart_actor_proto = out.File
file_cart_actor_proto_goTypes = nil
file_cart_actor_proto_depIdxs = nil
}

89
proto/cart_actor.proto Normal file
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@@ -0,0 +1,89 @@
syntax = "proto3";
package messages;
option go_package = ".;messages";
// -----------------------------------------------------------------------------
// Cart Actor gRPC API (Envelope Variant)
// -----------------------------------------------------------------------------
// This service replaces the legacy custom TCP frame protocol used on port 1337.
// It keeps the existing per-mutation proto messages (defined in messages.proto)
// serialized into an opaque `bytes payload` field for minimal refactor cost.
// The numeric values in MutationType MUST match the legacy message type
// constants (see message-types.go) so persisted event logs replay correctly.
// -----------------------------------------------------------------------------
// MutationType corresponds 1:1 with the legacy uint16 message type constants.
enum MutationType {
MUTATION_TYPE_UNSPECIFIED = 0;
MUTATION_ADD_REQUEST = 1;
MUTATION_ADD_ITEM = 2;
// (3 was unused / reserved in legacy framing)
MUTATION_REMOVE_ITEM = 4;
MUTATION_REMOVE_DELIVERY = 5;
MUTATION_CHANGE_QUANTITY = 6;
MUTATION_SET_DELIVERY = 7;
MUTATION_SET_PICKUP_POINT = 8;
MUTATION_CREATE_CHECKOUT_ORDER = 9;
MUTATION_SET_CART_ITEMS = 10;
MUTATION_ORDER_COMPLETED = 11;
}
// MutationRequest is an envelope:
// - cart_id: string form of CartId (legacy 16-byte array truncated/padded).
// - type: mutation kind (see enum).
// - payload: serialized underlying proto message (AddRequest, AddItem, etc.).
// - client_timestamp: optional unix timestamp; server sets if zero.
message MutationRequest {
string cart_id = 1;
MutationType type = 2;
bytes payload = 3;
int64 client_timestamp = 4;
}
// MutationReply returns a status code (legacy semantics) plus a JSON payload
// representing the full cart state (or an error message if non-200).
message MutationReply {
int32 status_code = 1;
bytes payload = 2; // JSON cart state or error string
}
// StateRequest fetches current cart state without mutation.
message StateRequest {
string cart_id = 1;
}
// StateReply mirrors MutationReply for consistency.
message StateReply {
int32 status_code = 1;
bytes payload = 2; // JSON cart state or error string
}
// CartActor exposes mutation and state retrieval for remote grains.
service CartActor {
// Mutate applies a single mutation to a cart, creating the cart lazily if needed.
rpc Mutate(MutationRequest) returns (MutationReply);
// GetState retrieves the cart's current state (JSON).
rpc GetState(StateRequest) returns (StateReply);
}
// -----------------------------------------------------------------------------
// Notes:
//
// 1. Generation:
// protoc --go_out=. --go_opt=paths=source_relative \
// --go-grpc_out=. --go-grpc_opt=paths=source_relative \
// cart_actor.proto
//
// 2. Underlying mutation payloads originate from messages.proto definitions.
// The server side will route based on MutationType and decode payload bytes
// using existing handler registry logic.
//
// 3. Future Enhancements:
// - Replace JSON state payload with a strongly typed CartState proto.
// - Add streaming RPC (e.g. WatchState) for live updates.
// - Migrate control plane (negotiate/ownership) into a separate proto
// (control_plane.proto) as per the migration plan.
// -----------------------------------------------------------------------------

167
proto/cart_actor_grpc.pb.go Normal file
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@@ -0,0 +1,167 @@
// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
// versions:
// - protoc-gen-go-grpc v1.5.1
// - protoc v3.21.12
// source: cart_actor.proto
package messages
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
// Requires gRPC-Go v1.64.0 or later.
const _ = grpc.SupportPackageIsVersion9
const (
CartActor_Mutate_FullMethodName = "/messages.CartActor/Mutate"
CartActor_GetState_FullMethodName = "/messages.CartActor/GetState"
)
// CartActorClient is the client API for CartActor service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
//
// CartActor exposes mutation and state retrieval for remote grains.
type CartActorClient interface {
// Mutate applies a single mutation to a cart, creating the cart lazily if needed.
Mutate(ctx context.Context, in *MutationRequest, opts ...grpc.CallOption) (*MutationReply, error)
// GetState retrieves the cart's current state (JSON).
GetState(ctx context.Context, in *StateRequest, opts ...grpc.CallOption) (*StateReply, error)
}
type cartActorClient struct {
cc grpc.ClientConnInterface
}
func NewCartActorClient(cc grpc.ClientConnInterface) CartActorClient {
return &cartActorClient{cc}
}
func (c *cartActorClient) Mutate(ctx context.Context, in *MutationRequest, opts ...grpc.CallOption) (*MutationReply, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(MutationReply)
err := c.cc.Invoke(ctx, CartActor_Mutate_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *cartActorClient) GetState(ctx context.Context, in *StateRequest, opts ...grpc.CallOption) (*StateReply, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(StateReply)
err := c.cc.Invoke(ctx, CartActor_GetState_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
// CartActorServer is the server API for CartActor service.
// All implementations must embed UnimplementedCartActorServer
// for forward compatibility.
//
// CartActor exposes mutation and state retrieval for remote grains.
type CartActorServer interface {
// Mutate applies a single mutation to a cart, creating the cart lazily if needed.
Mutate(context.Context, *MutationRequest) (*MutationReply, error)
// GetState retrieves the cart's current state (JSON).
GetState(context.Context, *StateRequest) (*StateReply, error)
mustEmbedUnimplementedCartActorServer()
}
// UnimplementedCartActorServer must be embedded to have
// forward compatible implementations.
//
// NOTE: this should be embedded by value instead of pointer to avoid a nil
// pointer dereference when methods are called.
type UnimplementedCartActorServer struct{}
func (UnimplementedCartActorServer) Mutate(context.Context, *MutationRequest) (*MutationReply, error) {
return nil, status.Errorf(codes.Unimplemented, "method Mutate not implemented")
}
func (UnimplementedCartActorServer) GetState(context.Context, *StateRequest) (*StateReply, error) {
return nil, status.Errorf(codes.Unimplemented, "method GetState not implemented")
}
func (UnimplementedCartActorServer) mustEmbedUnimplementedCartActorServer() {}
func (UnimplementedCartActorServer) testEmbeddedByValue() {}
// UnsafeCartActorServer may be embedded to opt out of forward compatibility for this service.
// Use of this interface is not recommended, as added methods to CartActorServer will
// result in compilation errors.
type UnsafeCartActorServer interface {
mustEmbedUnimplementedCartActorServer()
}
func RegisterCartActorServer(s grpc.ServiceRegistrar, srv CartActorServer) {
// If the following call pancis, it indicates UnimplementedCartActorServer was
// embedded by pointer and is nil. This will cause panics if an
// unimplemented method is ever invoked, so we test this at initialization
// time to prevent it from happening at runtime later due to I/O.
if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
t.testEmbeddedByValue()
}
s.RegisterService(&CartActor_ServiceDesc, srv)
}
func _CartActor_Mutate_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(MutationRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(CartActorServer).Mutate(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: CartActor_Mutate_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(CartActorServer).Mutate(ctx, req.(*MutationRequest))
}
return interceptor(ctx, in, info, handler)
}
func _CartActor_GetState_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(StateRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(CartActorServer).GetState(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: CartActor_GetState_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(CartActorServer).GetState(ctx, req.(*StateRequest))
}
return interceptor(ctx, in, info, handler)
}
// CartActor_ServiceDesc is the grpc.ServiceDesc for CartActor service.
// It's only intended for direct use with grpc.RegisterService,
// and not to be introspected or modified (even as a copy)
var CartActor_ServiceDesc = grpc.ServiceDesc{
ServiceName: "messages.CartActor",
HandlerType: (*CartActorServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Mutate",
Handler: _CartActor_Mutate_Handler,
},
{
MethodName: "GetState",
Handler: _CartActor_GetState_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "cart_actor.proto",
}

496
proto/control_plane.pb.go Normal file
View File

@@ -0,0 +1,496 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.36.10
// protoc v3.21.12
// source: control_plane.proto
package messages
import (
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
sync "sync"
unsafe "unsafe"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// Empty request placeholder (common pattern).
type Empty struct {
state protoimpl.MessageState `protogen:"open.v1"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *Empty) Reset() {
*x = Empty{}
mi := &file_control_plane_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *Empty) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Empty) ProtoMessage() {}
func (x *Empty) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[0]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Empty.ProtoReflect.Descriptor instead.
func (*Empty) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{0}
}
// Ping reply includes responding host and its current unix time (seconds).
type PingReply struct {
state protoimpl.MessageState `protogen:"open.v1"`
Host string `protobuf:"bytes,1,opt,name=host,proto3" json:"host,omitempty"`
UnixTime int64 `protobuf:"varint,2,opt,name=unix_time,json=unixTime,proto3" json:"unix_time,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *PingReply) Reset() {
*x = PingReply{}
mi := &file_control_plane_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *PingReply) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*PingReply) ProtoMessage() {}
func (x *PingReply) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[1]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use PingReply.ProtoReflect.Descriptor instead.
func (*PingReply) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{1}
}
func (x *PingReply) GetHost() string {
if x != nil {
return x.Host
}
return ""
}
func (x *PingReply) GetUnixTime() int64 {
if x != nil {
return x.UnixTime
}
return 0
}
// NegotiateRequest carries the caller's full view of known hosts (including self).
type NegotiateRequest struct {
state protoimpl.MessageState `protogen:"open.v1"`
KnownHosts []string `protobuf:"bytes,1,rep,name=known_hosts,json=knownHosts,proto3" json:"known_hosts,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *NegotiateRequest) Reset() {
*x = NegotiateRequest{}
mi := &file_control_plane_proto_msgTypes[2]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *NegotiateRequest) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*NegotiateRequest) ProtoMessage() {}
func (x *NegotiateRequest) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[2]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use NegotiateRequest.ProtoReflect.Descriptor instead.
func (*NegotiateRequest) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{2}
}
func (x *NegotiateRequest) GetKnownHosts() []string {
if x != nil {
return x.KnownHosts
}
return nil
}
// NegotiateReply returns the callee's healthy hosts (including itself).
type NegotiateReply struct {
state protoimpl.MessageState `protogen:"open.v1"`
Hosts []string `protobuf:"bytes,1,rep,name=hosts,proto3" json:"hosts,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *NegotiateReply) Reset() {
*x = NegotiateReply{}
mi := &file_control_plane_proto_msgTypes[3]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *NegotiateReply) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*NegotiateReply) ProtoMessage() {}
func (x *NegotiateReply) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[3]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use NegotiateReply.ProtoReflect.Descriptor instead.
func (*NegotiateReply) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{3}
}
func (x *NegotiateReply) GetHosts() []string {
if x != nil {
return x.Hosts
}
return nil
}
// CartIdsReply returns the list of cart IDs (string form) currently owned locally.
type CartIdsReply struct {
state protoimpl.MessageState `protogen:"open.v1"`
CartIds []string `protobuf:"bytes,1,rep,name=cart_ids,json=cartIds,proto3" json:"cart_ids,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *CartIdsReply) Reset() {
*x = CartIdsReply{}
mi := &file_control_plane_proto_msgTypes[4]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *CartIdsReply) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*CartIdsReply) ProtoMessage() {}
func (x *CartIdsReply) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[4]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use CartIdsReply.ProtoReflect.Descriptor instead.
func (*CartIdsReply) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{4}
}
func (x *CartIdsReply) GetCartIds() []string {
if x != nil {
return x.CartIds
}
return nil
}
// OwnerChangeRequest notifies peers that ownership of a cart moved (or is moving) to new_host.
type OwnerChangeRequest struct {
state protoimpl.MessageState `protogen:"open.v1"`
CartId string `protobuf:"bytes,1,opt,name=cart_id,json=cartId,proto3" json:"cart_id,omitempty"`
NewHost string `protobuf:"bytes,2,opt,name=new_host,json=newHost,proto3" json:"new_host,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *OwnerChangeRequest) Reset() {
*x = OwnerChangeRequest{}
mi := &file_control_plane_proto_msgTypes[5]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *OwnerChangeRequest) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*OwnerChangeRequest) ProtoMessage() {}
func (x *OwnerChangeRequest) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[5]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use OwnerChangeRequest.ProtoReflect.Descriptor instead.
func (*OwnerChangeRequest) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{5}
}
func (x *OwnerChangeRequest) GetCartId() string {
if x != nil {
return x.CartId
}
return ""
}
func (x *OwnerChangeRequest) GetNewHost() string {
if x != nil {
return x.NewHost
}
return ""
}
// OwnerChangeAck indicates acceptance or rejection of an ownership change.
type OwnerChangeAck struct {
state protoimpl.MessageState `protogen:"open.v1"`
Accepted bool `protobuf:"varint,1,opt,name=accepted,proto3" json:"accepted,omitempty"`
Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *OwnerChangeAck) Reset() {
*x = OwnerChangeAck{}
mi := &file_control_plane_proto_msgTypes[6]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *OwnerChangeAck) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*OwnerChangeAck) ProtoMessage() {}
func (x *OwnerChangeAck) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[6]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use OwnerChangeAck.ProtoReflect.Descriptor instead.
func (*OwnerChangeAck) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{6}
}
func (x *OwnerChangeAck) GetAccepted() bool {
if x != nil {
return x.Accepted
}
return false
}
func (x *OwnerChangeAck) GetMessage() string {
if x != nil {
return x.Message
}
return ""
}
// ClosingNotice notifies peers this host is terminating (so they can drop / re-resolve).
type ClosingNotice struct {
state protoimpl.MessageState `protogen:"open.v1"`
Host string `protobuf:"bytes,1,opt,name=host,proto3" json:"host,omitempty"`
unknownFields protoimpl.UnknownFields
sizeCache protoimpl.SizeCache
}
func (x *ClosingNotice) Reset() {
*x = ClosingNotice{}
mi := &file_control_plane_proto_msgTypes[7]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
func (x *ClosingNotice) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*ClosingNotice) ProtoMessage() {}
func (x *ClosingNotice) ProtoReflect() protoreflect.Message {
mi := &file_control_plane_proto_msgTypes[7]
if x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use ClosingNotice.ProtoReflect.Descriptor instead.
func (*ClosingNotice) Descriptor() ([]byte, []int) {
return file_control_plane_proto_rawDescGZIP(), []int{7}
}
func (x *ClosingNotice) GetHost() string {
if x != nil {
return x.Host
}
return ""
}
var File_control_plane_proto protoreflect.FileDescriptor
const file_control_plane_proto_rawDesc = "" +
"\n" +
"\x13control_plane.proto\x12\bmessages\"\a\n" +
"\x05Empty\"<\n" +
"\tPingReply\x12\x12\n" +
"\x04host\x18\x01 \x01(\tR\x04host\x12\x1b\n" +
"\tunix_time\x18\x02 \x01(\x03R\bunixTime\"3\n" +
"\x10NegotiateRequest\x12\x1f\n" +
"\vknown_hosts\x18\x01 \x03(\tR\n" +
"knownHosts\"&\n" +
"\x0eNegotiateReply\x12\x14\n" +
"\x05hosts\x18\x01 \x03(\tR\x05hosts\")\n" +
"\fCartIdsReply\x12\x19\n" +
"\bcart_ids\x18\x01 \x03(\tR\acartIds\"H\n" +
"\x12OwnerChangeRequest\x12\x17\n" +
"\acart_id\x18\x01 \x01(\tR\x06cartId\x12\x19\n" +
"\bnew_host\x18\x02 \x01(\tR\anewHost\"F\n" +
"\x0eOwnerChangeAck\x12\x1a\n" +
"\baccepted\x18\x01 \x01(\bR\baccepted\x12\x18\n" +
"\amessage\x18\x02 \x01(\tR\amessage\"#\n" +
"\rClosingNotice\x12\x12\n" +
"\x04host\x18\x01 \x01(\tR\x04host2\xbc\x02\n" +
"\fControlPlane\x12,\n" +
"\x04Ping\x12\x0f.messages.Empty\x1a\x13.messages.PingReply\x12A\n" +
"\tNegotiate\x12\x1a.messages.NegotiateRequest\x1a\x18.messages.NegotiateReply\x125\n" +
"\n" +
"GetCartIds\x12\x0f.messages.Empty\x1a\x16.messages.CartIdsReply\x12F\n" +
"\fConfirmOwner\x12\x1c.messages.OwnerChangeRequest\x1a\x18.messages.OwnerChangeAck\x12<\n" +
"\aClosing\x12\x17.messages.ClosingNotice\x1a\x18.messages.OwnerChangeAckB\fZ\n" +
".;messagesb\x06proto3"
var (
file_control_plane_proto_rawDescOnce sync.Once
file_control_plane_proto_rawDescData []byte
)
func file_control_plane_proto_rawDescGZIP() []byte {
file_control_plane_proto_rawDescOnce.Do(func() {
file_control_plane_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_control_plane_proto_rawDesc), len(file_control_plane_proto_rawDesc)))
})
return file_control_plane_proto_rawDescData
}
var file_control_plane_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
var file_control_plane_proto_goTypes = []any{
(*Empty)(nil), // 0: messages.Empty
(*PingReply)(nil), // 1: messages.PingReply
(*NegotiateRequest)(nil), // 2: messages.NegotiateRequest
(*NegotiateReply)(nil), // 3: messages.NegotiateReply
(*CartIdsReply)(nil), // 4: messages.CartIdsReply
(*OwnerChangeRequest)(nil), // 5: messages.OwnerChangeRequest
(*OwnerChangeAck)(nil), // 6: messages.OwnerChangeAck
(*ClosingNotice)(nil), // 7: messages.ClosingNotice
}
var file_control_plane_proto_depIdxs = []int32{
0, // 0: messages.ControlPlane.Ping:input_type -> messages.Empty
2, // 1: messages.ControlPlane.Negotiate:input_type -> messages.NegotiateRequest
0, // 2: messages.ControlPlane.GetCartIds:input_type -> messages.Empty
5, // 3: messages.ControlPlane.ConfirmOwner:input_type -> messages.OwnerChangeRequest
7, // 4: messages.ControlPlane.Closing:input_type -> messages.ClosingNotice
1, // 5: messages.ControlPlane.Ping:output_type -> messages.PingReply
3, // 6: messages.ControlPlane.Negotiate:output_type -> messages.NegotiateReply
4, // 7: messages.ControlPlane.GetCartIds:output_type -> messages.CartIdsReply
6, // 8: messages.ControlPlane.ConfirmOwner:output_type -> messages.OwnerChangeAck
6, // 9: messages.ControlPlane.Closing:output_type -> messages.OwnerChangeAck
5, // [5:10] is the sub-list for method output_type
0, // [0:5] is the sub-list for method input_type
0, // [0:0] is the sub-list for extension type_name
0, // [0:0] is the sub-list for extension extendee
0, // [0:0] is the sub-list for field type_name
}
func init() { file_control_plane_proto_init() }
func file_control_plane_proto_init() {
if File_control_plane_proto != nil {
return
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: unsafe.Slice(unsafe.StringData(file_control_plane_proto_rawDesc), len(file_control_plane_proto_rawDesc)),
NumEnums: 0,
NumMessages: 8,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_control_plane_proto_goTypes,
DependencyIndexes: file_control_plane_proto_depIdxs,
MessageInfos: file_control_plane_proto_msgTypes,
}.Build()
File_control_plane_proto = out.File
file_control_plane_proto_goTypes = nil
file_control_plane_proto_depIdxs = nil
}

89
proto/control_plane.proto Normal file
View File

@@ -0,0 +1,89 @@
syntax = "proto3";
package messages;
option go_package = ".;messages";
// -----------------------------------------------------------------------------
// Control Plane gRPC API
// -----------------------------------------------------------------------------
// Replaces the legacy custom frame-based control channel (previously port 1338).
// Responsibilities:
// - Liveness (Ping)
// - Membership negotiation (Negotiate)
// - Cart ownership change propagation (ConfirmOwner)
// - Cart ID listing for remote grain spawning (GetCartIds)
// - Graceful shutdown notifications (Closing)
// No authentication / TLS is defined initially (can be added later).
// -----------------------------------------------------------------------------
// Empty request placeholder (common pattern).
message Empty {}
// Ping reply includes responding host and its current unix time (seconds).
message PingReply {
string host = 1;
int64 unix_time = 2;
}
// NegotiateRequest carries the caller's full view of known hosts (including self).
message NegotiateRequest {
repeated string known_hosts = 1;
}
// NegotiateReply returns the callee's healthy hosts (including itself).
message NegotiateReply {
repeated string hosts = 1;
}
// CartIdsReply returns the list of cart IDs (string form) currently owned locally.
message CartIdsReply {
repeated string cart_ids = 1;
}
// OwnerChangeRequest notifies peers that ownership of a cart moved (or is moving) to new_host.
message OwnerChangeRequest {
string cart_id = 1;
string new_host = 2;
}
// OwnerChangeAck indicates acceptance or rejection of an ownership change.
message OwnerChangeAck {
bool accepted = 1;
string message = 2;
}
// ClosingNotice notifies peers this host is terminating (so they can drop / re-resolve).
message ClosingNotice {
string host = 1;
}
// ControlPlane defines cluster coordination and ownership operations.
service ControlPlane {
// Ping for liveness; lightweight health signal.
rpc Ping(Empty) returns (PingReply);
// Negotiate merges host views; used during discovery & convergence.
rpc Negotiate(NegotiateRequest) returns (NegotiateReply);
// GetCartIds lists currently owned cart IDs on this node.
rpc GetCartIds(Empty) returns (CartIdsReply);
// ConfirmOwner announces/asks peers to acknowledge ownership transfer.
rpc ConfirmOwner(OwnerChangeRequest) returns (OwnerChangeAck);
// Closing announces graceful shutdown so peers can proactively adjust.
rpc Closing(ClosingNotice) returns (OwnerChangeAck);
}
// -----------------------------------------------------------------------------
// Generation Instructions:
// protoc --go_out=. --go_opt=paths=source_relative \
// --go-grpc_out=. --go-grpc_opt=paths=source_relative \
// control_plane.proto
//
// Future Enhancements:
// - Add a streaming membership watch (server -> client) for immediate updates.
// - Add TLS / mTLS for secure intra-cluster communication.
// - Add richer health metadata (load, grain count) in PingReply.
// -----------------------------------------------------------------------------

287
proto/control_plane_grpc.pb.go Normal file
View File

@@ -0,0 +1,287 @@
// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
// versions:
// - protoc-gen-go-grpc v1.5.1
// - protoc v3.21.12
// source: control_plane.proto
package messages
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
// Requires gRPC-Go v1.64.0 or later.
const _ = grpc.SupportPackageIsVersion9
const (
ControlPlane_Ping_FullMethodName = "/messages.ControlPlane/Ping"
ControlPlane_Negotiate_FullMethodName = "/messages.ControlPlane/Negotiate"
ControlPlane_GetCartIds_FullMethodName = "/messages.ControlPlane/GetCartIds"
ControlPlane_ConfirmOwner_FullMethodName = "/messages.ControlPlane/ConfirmOwner"
ControlPlane_Closing_FullMethodName = "/messages.ControlPlane/Closing"
)
// ControlPlaneClient is the client API for ControlPlane service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
//
// ControlPlane defines cluster coordination and ownership operations.
type ControlPlaneClient interface {
// Ping for liveness; lightweight health signal.
Ping(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*PingReply, error)
// Negotiate merges host views; used during discovery & convergence.
Negotiate(ctx context.Context, in *NegotiateRequest, opts ...grpc.CallOption) (*NegotiateReply, error)
// GetCartIds lists currently owned cart IDs on this node.
GetCartIds(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*CartIdsReply, error)
// ConfirmOwner announces/asks peers to acknowledge ownership transfer.
ConfirmOwner(ctx context.Context, in *OwnerChangeRequest, opts ...grpc.CallOption) (*OwnerChangeAck, error)
// Closing announces graceful shutdown so peers can proactively adjust.
Closing(ctx context.Context, in *ClosingNotice, opts ...grpc.CallOption) (*OwnerChangeAck, error)
}
type controlPlaneClient struct {
cc grpc.ClientConnInterface
}
func NewControlPlaneClient(cc grpc.ClientConnInterface) ControlPlaneClient {
return &controlPlaneClient{cc}
}
func (c *controlPlaneClient) Ping(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*PingReply, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(PingReply)
err := c.cc.Invoke(ctx, ControlPlane_Ping_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *controlPlaneClient) Negotiate(ctx context.Context, in *NegotiateRequest, opts ...grpc.CallOption) (*NegotiateReply, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(NegotiateReply)
err := c.cc.Invoke(ctx, ControlPlane_Negotiate_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *controlPlaneClient) GetCartIds(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*CartIdsReply, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(CartIdsReply)
err := c.cc.Invoke(ctx, ControlPlane_GetCartIds_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *controlPlaneClient) ConfirmOwner(ctx context.Context, in *OwnerChangeRequest, opts ...grpc.CallOption) (*OwnerChangeAck, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(OwnerChangeAck)
err := c.cc.Invoke(ctx, ControlPlane_ConfirmOwner_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *controlPlaneClient) Closing(ctx context.Context, in *ClosingNotice, opts ...grpc.CallOption) (*OwnerChangeAck, error) {
cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
out := new(OwnerChangeAck)
err := c.cc.Invoke(ctx, ControlPlane_Closing_FullMethodName, in, out, cOpts...)
if err != nil {
return nil, err
}
return out, nil
}
// ControlPlaneServer is the server API for ControlPlane service.
// All implementations must embed UnimplementedControlPlaneServer
// for forward compatibility.
//
// ControlPlane defines cluster coordination and ownership operations.
type ControlPlaneServer interface {
// Ping for liveness; lightweight health signal.
Ping(context.Context, *Empty) (*PingReply, error)
// Negotiate merges host views; used during discovery & convergence.
Negotiate(context.Context, *NegotiateRequest) (*NegotiateReply, error)
// GetCartIds lists currently owned cart IDs on this node.
GetCartIds(context.Context, *Empty) (*CartIdsReply, error)
// ConfirmOwner announces/asks peers to acknowledge ownership transfer.
ConfirmOwner(context.Context, *OwnerChangeRequest) (*OwnerChangeAck, error)
// Closing announces graceful shutdown so peers can proactively adjust.
Closing(context.Context, *ClosingNotice) (*OwnerChangeAck, error)
mustEmbedUnimplementedControlPlaneServer()
}
// UnimplementedControlPlaneServer must be embedded to have
// forward compatible implementations.
//
// NOTE: this should be embedded by value instead of pointer to avoid a nil
// pointer dereference when methods are called.
type UnimplementedControlPlaneServer struct{}
func (UnimplementedControlPlaneServer) Ping(context.Context, *Empty) (*PingReply, error) {
return nil, status.Errorf(codes.Unimplemented, "method Ping not implemented")
}
func (UnimplementedControlPlaneServer) Negotiate(context.Context, *NegotiateRequest) (*NegotiateReply, error) {
return nil, status.Errorf(codes.Unimplemented, "method Negotiate not implemented")
}
func (UnimplementedControlPlaneServer) GetCartIds(context.Context, *Empty) (*CartIdsReply, error) {
return nil, status.Errorf(codes.Unimplemented, "method GetCartIds not implemented")
}
func (UnimplementedControlPlaneServer) ConfirmOwner(context.Context, *OwnerChangeRequest) (*OwnerChangeAck, error) {
return nil, status.Errorf(codes.Unimplemented, "method ConfirmOwner not implemented")
}
func (UnimplementedControlPlaneServer) Closing(context.Context, *ClosingNotice) (*OwnerChangeAck, error) {
return nil, status.Errorf(codes.Unimplemented, "method Closing not implemented")
}
func (UnimplementedControlPlaneServer) mustEmbedUnimplementedControlPlaneServer() {}
func (UnimplementedControlPlaneServer) testEmbeddedByValue() {}
// UnsafeControlPlaneServer may be embedded to opt out of forward compatibility for this service.
// Use of this interface is not recommended, as added methods to ControlPlaneServer will
// result in compilation errors.
type UnsafeControlPlaneServer interface {
mustEmbedUnimplementedControlPlaneServer()
}
func RegisterControlPlaneServer(s grpc.ServiceRegistrar, srv ControlPlaneServer) {
// If the following call pancis, it indicates UnimplementedControlPlaneServer was
// embedded by pointer and is nil. This will cause panics if an
// unimplemented method is ever invoked, so we test this at initialization
// time to prevent it from happening at runtime later due to I/O.
if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
t.testEmbeddedByValue()
}
s.RegisterService(&ControlPlane_ServiceDesc, srv)
}
func _ControlPlane_Ping_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Empty)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ControlPlaneServer).Ping(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: ControlPlane_Ping_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ControlPlaneServer).Ping(ctx, req.(*Empty))
}
return interceptor(ctx, in, info, handler)
}
func _ControlPlane_Negotiate_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(NegotiateRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ControlPlaneServer).Negotiate(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: ControlPlane_Negotiate_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ControlPlaneServer).Negotiate(ctx, req.(*NegotiateRequest))
}
return interceptor(ctx, in, info, handler)
}
func _ControlPlane_GetCartIds_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Empty)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ControlPlaneServer).GetCartIds(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: ControlPlane_GetCartIds_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ControlPlaneServer).GetCartIds(ctx, req.(*Empty))
}
return interceptor(ctx, in, info, handler)
}
func _ControlPlane_ConfirmOwner_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(OwnerChangeRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ControlPlaneServer).ConfirmOwner(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: ControlPlane_ConfirmOwner_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ControlPlaneServer).ConfirmOwner(ctx, req.(*OwnerChangeRequest))
}
return interceptor(ctx, in, info, handler)
}
func _ControlPlane_Closing_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(ClosingNotice)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ControlPlaneServer).Closing(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: ControlPlane_Closing_FullMethodName,
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ControlPlaneServer).Closing(ctx, req.(*ClosingNotice))
}
return interceptor(ctx, in, info, handler)
}
// ControlPlane_ServiceDesc is the grpc.ServiceDesc for ControlPlane service.
// It's only intended for direct use with grpc.RegisterService,
// and not to be introspected or modified (even as a copy)
var ControlPlane_ServiceDesc = grpc.ServiceDesc{
ServiceName: "messages.ControlPlane",
HandlerType: (*ControlPlaneServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Ping",
Handler: _ControlPlane_Ping_Handler,
},
{
MethodName: "Negotiate",
Handler: _ControlPlane_Negotiate_Handler,
},
{
MethodName: "GetCartIds",
Handler: _ControlPlane_GetCartIds_Handler,
},
{
MethodName: "ConfirmOwner",
Handler: _ControlPlane_ConfirmOwner_Handler,
},
{
MethodName: "Closing",
Handler: _ControlPlane_Closing_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "control_plane.proto",
}

72
remote-grain.go
View File

@@ -1,72 +0,0 @@
package main
import (
"fmt"
"strings"
"github.com/yudhasubki/netpool"
)
func (id CartId) String() string {
return strings.Trim(string(id[:]), "\x00")
}
type CartIdPayload struct {
Id CartId
Data []byte
}
func MakeCartInnerFrame(id CartId, payload []byte) []byte {
if payload == nil {
return id[:]
}
return append(id[:], payload...)
}
func GetCartFrame(data []byte) (*CartIdPayload, error) {
if len(data) < 16 {
return nil, fmt.Errorf("data too short")
}
return &CartIdPayload{
Id: CartId(data[:16]),
Data: data[16:],
}, nil
}
func ToCartId(id string) CartId {
var result [16]byte
copy(result[:], []byte(id))
return result
}
type RemoteGrain struct {
*Connection
Id CartId
Host string
}
func NewRemoteGrain(id CartId, host string, pool netpool.Netpooler) *RemoteGrain {
addr := fmt.Sprintf("%s:1337", host)
return &RemoteGrain{
Id: id,
Host: host,
Connection: NewConnection(addr, pool),
}
}
func (g *RemoteGrain) HandleMessage(message *Message, isReplay bool) (*FrameWithPayload, error) {
data, err := GetData(message.Write)
if err != nil {
return nil, err
}
return g.Call(RemoteHandleMutation, MakeCartInnerFrame(g.Id, data))
}
func (g *RemoteGrain) GetId() CartId {
return g.Id
}
func (g *RemoteGrain) GetCurrentState() (*FrameWithPayload, error) {
return g.Call(RemoteGetState, MakeCartInnerFrame(g.Id, nil))
}

17
remote-grain_test.go
View File

@@ -1,17 +0,0 @@
package main
import "testing"
func TestCartIdsNullData(t *testing.T) {
data := MakeCartInnerFrame(ToCartId("kalle"), nil)
cart, err := GetCartFrame(data)
if err != nil {
t.Errorf("Error getting cart: %v", err)
}
if cart.Id.String() != "kalle" {
t.Errorf("Expected kalle, got %s", cart.Id)
}
if len(cart.Data) != 0 {
t.Errorf("Expected no data, got %v", cart.Data)
}
}

93
remote-host.go
View File

@@ -1,93 +0,0 @@
package main
import (
"fmt"
"log"
"strings"
"github.com/yudhasubki/netpool"
)
type RemoteHost struct {
*Connection
HostPool netpool.Netpooler
Host string
MissedPings int
}
func (h *RemoteHost) IsHealthy() bool {
return h.MissedPings < 3
}
func (h *RemoteHost) Initialize(p *SyncedPool) {
log.Printf("Initializing remote %s\n", h.Host)
ids, err := h.GetCartMappings()
if err != nil {
log.Printf("Error getting remote mappings: %v\n", err)
return
}
log.Printf("Remote %s has %d grains\n", h.Host, len(ids))
local := 0
remoteNo := 0
for _, id := range ids {
go p.SpawnRemoteGrain(id, h.Host)
remoteNo++
}
log.Printf("Removed %d local grains, added %d remote grains\n", local, remoteNo)
go p.Negotiate()
}
func (h *RemoteHost) Ping() error {
result, err := h.Call(Ping, nil)
if err != nil || result.StatusCode != 200 || result.Type != Pong {
h.MissedPings++
log.Printf("Error pinging remote %s, missed pings: %d", h.Host, h.MissedPings)
} else {
h.MissedPings = 0
}
return err
}
func (h *RemoteHost) Negotiate(knownHosts []string) ([]string, error) {
reply, err := h.Call(RemoteNegotiate, []byte(strings.Join(knownHosts, ";")))
if err != nil {
return nil, err
}
if reply.StatusCode != 200 {
return nil, fmt.Errorf("remote returned error on negotiate: %s", string(reply.Payload))
}
return strings.Split(string(reply.Payload), ";"), nil
}
func (g *RemoteHost) GetCartMappings() ([]CartId, error) {
reply, err := g.Call(GetCartIds, []byte{})
if err != nil {
return nil, err
}
if reply.StatusCode != 200 || reply.Type != CartIdsResponse {
log.Printf("Remote returned error on get cart mappings: %s", string(reply.Payload))
return nil, fmt.Errorf("remote returned incorrect data")
}
parts := strings.Split(string(reply.Payload), ";")
ids := make([]CartId, 0, len(parts))
for _, p := range parts {
ids = append(ids, ToCartId(p))
}
return ids, nil
}
func (r *RemoteHost) ConfirmChange(id CartId, host string) error {
reply, err := r.Call(RemoteGrainChanged, []byte(fmt.Sprintf("%s;%s", id, host)))
if err != nil || reply.StatusCode != 200 || reply.Type != AckChange {
return err
}
return nil
}

147
remote_grain_grpc.go Normal file
View File

@@ -0,0 +1,147 @@
package main
import (
"bytes"
"context"
"fmt"
"log"
"time"
proto "git.tornberg.me/go-cart-actor/proto" // generated package name is 'messages'; aliased as proto for consistency
"google.golang.org/grpc"
)
// RemoteGrainGRPC is the gRPC-backed implementation of a remote grain.
// It mirrors the previous RemoteGrain (TCP/frame based) while using the
// new CartActor gRPC service. It implements the Grain interface so that
// SyncedPool can remain largely unchanged when swapping transport layers.
type RemoteGrainGRPC struct {
Id CartId
Host string
client proto.CartActorClient
// Optional: keep the underlying conn so higher-level code can close if needed
conn *grpc.ClientConn
// Per-call timeout settings (tunable)
mutateTimeout time.Duration
stateTimeout time.Duration
}
// NewRemoteGrainGRPC constructs a remote grain adapter from an existing gRPC client.
func NewRemoteGrainGRPC(id CartId, host string, client proto.CartActorClient) *RemoteGrainGRPC {
return &RemoteGrainGRPC{
Id: id,
Host: host,
client: client,
mutateTimeout: 800 * time.Millisecond,
stateTimeout: 400 * time.Millisecond,
}
}
// NewRemoteGrainGRPCWithConn dials the target and creates the gRPC client.
// target should be host:port (where the CartActor service is exposed).
func NewRemoteGrainGRPCWithConn(id CartId, host string, target string, dialOpts ...grpc.DialOption) (*RemoteGrainGRPC, error) {
// NOTE: insecure for initial migration; should be replaced with TLS later.
baseOpts := []grpc.DialOption{grpc.WithInsecure(), grpc.WithBlock()}
baseOpts = append(baseOpts, dialOpts...)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
conn, err := grpc.DialContext(ctx, target, baseOpts...)
if err != nil {
return nil, err
}
client := proto.NewCartActorClient(conn)
return &RemoteGrainGRPC{
Id: id,
Host: host,
client: client,
conn: conn,
mutateTimeout: 800 * time.Millisecond,
stateTimeout: 400 * time.Millisecond,
}, nil
}
func (g *RemoteGrainGRPC) GetId() CartId {
return g.Id
}
// HandleMessage serializes the underlying mutation proto (without legacy message header)
// and invokes the CartActor.Mutate RPC. It wraps the reply into a FrameWithPayload
// for compatibility with existing higher-level code paths.
func (g *RemoteGrainGRPC) HandleMessage(message *Message, isReplay bool) (*FrameWithPayload, error) {
if message == nil {
return nil, fmt.Errorf("nil message")
}
if isReplay {
// Remote replay not expected; ignore to keep parity with old implementation.
return nil, fmt.Errorf("replay not supported for remote grains")
}
handler, err := GetMessageHandler(message.Type)
if err != nil {
return nil, err
}
// Ensure timestamp set (legacy behavior)
if message.TimeStamp == nil {
ts := time.Now().Unix()
message.TimeStamp = &ts
}
// Marshal underlying proto payload only (no StorableMessageHeader)
var buf bytes.Buffer
err = handler.Write(message, &buf)
if err != nil {
return nil, fmt.Errorf("encode mutation payload: %w", err)
}
req := &proto.MutationRequest{
CartId: g.Id.String(),
Type: proto.MutationType(message.Type), // numeric mapping preserved
Payload: buf.Bytes(),
ClientTimestamp: *message.TimeStamp,
}
ctx, cancel := context.WithTimeout(context.Background(), g.mutateTimeout)
defer cancel()
resp, err := g.client.Mutate(ctx, req)
if err != nil {
return nil, err
}
frame := MakeFrameWithPayload(RemoteHandleMutationReply, StatusCode(resp.StatusCode), resp.Payload)
return &frame, nil
}
// GetCurrentState calls CartActor.GetState and returns a FrameWithPayload
// shaped like the legacy RemoteGetStateReply.
func (g *RemoteGrainGRPC) GetCurrentState() (*FrameWithPayload, error) {
ctx, cancel := context.WithTimeout(context.Background(), g.stateTimeout)
defer cancel()
resp, err := g.client.GetState(ctx, &proto.StateRequest{
CartId: g.Id.String(),
})
if err != nil {
return nil, err
}
frame := MakeFrameWithPayload(RemoteGetStateReply, StatusCode(resp.StatusCode), resp.Payload)
return &frame, nil
}
// Close closes the underlying gRPC connection if this adapter created it.
func (g *RemoteGrainGRPC) Close() error {
if g.conn != nil {
return g.conn.Close()
}
return nil
}
// Debug helper to log operations (optional).
func (g *RemoteGrainGRPC) logf(format string, args ...interface{}) {
log.Printf("[remote-grain-grpc host=%s id=%s] %s", g.Host, g.Id.String(), fmt.Sprintf(format, args...))
}

69
rpc-server.go
View File

@@ -1,69 +0,0 @@
package main
import (
"bytes"
"fmt"
)
type GrainHandler struct {
*GenericListener
pool *GrainLocalPool
}
func (h *GrainHandler) GetState(id CartId, reply *Grain) error {
grain, err := h.pool.GetGrain(id)
if err != nil {
return err
}
*reply = grain
return nil
}
func NewGrainHandler(pool *GrainLocalPool, listen string) (*GrainHandler, error) {
conn := NewConnection(listen, nil)
server, err := conn.Listen()
handler := &GrainHandler{
GenericListener: server,
pool: pool,
}
server.AddHandler(RemoteHandleMutation, handler.RemoteHandleMessageHandler)
server.AddHandler(RemoteGetState, handler.RemoteGetStateHandler)
return handler, err
}
func (h *GrainHandler) IsHealthy() bool {
return len(h.pool.grains) < h.pool.PoolSize
}
func (h *GrainHandler) RemoteHandleMessageHandler(data *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
cartData, err := GetCartFrame(data.Payload)
if err != nil {
return err
}
var msg Message
err = ReadMessage(bytes.NewReader(cartData.Data), &msg)
if err != nil {
fmt.Println("Error reading message:", err)
return err
}
replyData, err := h.pool.Process(cartData.Id, msg)
if err != nil {
return err
}
resultChan <- *replyData
return err
}
func (h *GrainHandler) RemoteGetStateHandler(data *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
cartData, err := GetCartFrame(data.Payload)
if err != nil {
return err
}
reply, err := h.pool.Get(cartData.Id)
if err != nil {
return err
}
resultChan <- *reply
return nil
}

716
synced-pool.go
View File

@@ -1,36 +1,59 @@
package main package main
import ( import (
"context"
"fmt" "fmt"
"log" "log"
"net"
"strings"
"sync" "sync"
"time" "time"
proto "git.tornberg.me/go-cart-actor/proto"
"github.com/prometheus/client_golang/prometheus" "github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto" "github.com/prometheus/client_golang/prometheus/promauto"
"github.com/yudhasubki/netpool" "google.golang.org/grpc"
"k8s.io/apimachinery/pkg/watch" "k8s.io/apimachinery/pkg/watch"
) )
type Quorum interface { // SyncedPool coordinates cart grain ownership across nodes using gRPC control plane
Negotiate(knownHosts []string) ([]string, error) // and cart actor services. Legacy frame / TCP code has been removed.
OwnerChanged(CartId, host string) error //
} // Responsibilities:
// - Local grain access (delegates to GrainLocalPool)
type HealthHandler interface { // - Remote grain proxy management (RemoteGrainGRPC)
IsHealthy() bool // - Cluster membership (AddRemote via discovery + negotiation)
} // - Ownership acquisition (quorum via ConfirmOwner RPC)
// - Health/ping monitoring & remote removal
//
// Thread-safety: public methods that mutate internal maps lock p.mu (RWMutex).
type SyncedPool struct { type SyncedPool struct {
Server *GenericListener Hostname string
mu sync.RWMutex local *GrainLocalPool
mu sync.RWMutex
// Remote host state (gRPC only)
remoteHosts map[string]*RemoteHostGRPC // host -> remote host
// Remote grain proxies (by cart id)
remoteIndex map[CartId]Grain
// Discovery handler for re-adding hosts after failures
discardedHostHandler *DiscardedHostHandler discardedHostHandler *DiscardedHostHandler
Hostname string
local *GrainLocalPool // Metrics / instrumentation dependencies already declared globally
remotes map[string]*RemoteHost }
remoteIndex map[CartId]*RemoteGrain
// RemoteHostGRPC tracks a remote host's clients & health.
type RemoteHostGRPC struct {
Host string
Conn *grpc.ClientConn
CartClient proto.CartActorClient
ControlClient proto.ControlPlaneClient
MissedPings int
}
func (r *RemoteHostGRPC) IsHealthy() bool {
return r.MissedPings < 3
} }
var ( var (
@@ -50,241 +73,172 @@ var (
Name: "cart_remote_lookup_total", Name: "cart_remote_lookup_total",
Help: "The total number of remote lookups", Help: "The total number of remote lookups",
}) })
packetQueue = promauto.NewGauge(prometheus.GaugeOpts{
Name: "cart_packet_queue_size",
Help: "The total number of packets in the queue",
})
packetsSent = promauto.NewCounter(prometheus.CounterOpts{
Name: "cart_pool_packets_sent_total",
Help: "The total number of packets sent",
})
packetsReceived = promauto.NewCounter(prometheus.CounterOpts{
Name: "cart_pool_packets_received_total",
Help: "The total number of packets received",
})
) )
func (p *SyncedPool) PongHandler(data *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
resultChan <- MakeFrameWithPayload(Pong, 200, []byte{})
return nil
}
func (p *SyncedPool) GetCartIdHandler(data *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
ids := make([]string, 0, len(p.local.grains))
p.mu.RLock()
defer p.mu.RUnlock()
for id := range p.local.grains {
if p.local.grains[id] == nil {
continue
}
s := id.String()
if s == "" {
continue
}
ids = append(ids, s)
}
log.Printf("Returning %d cart ids\n", len(ids))
resultChan <- MakeFrameWithPayload(CartIdsResponse, 200, []byte(strings.Join(ids, ";")))
return nil
}
func (p *SyncedPool) NegotiateHandler(data *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
negotiationCount.Inc()
log.Printf("Handling negotiation\n")
for _, host := range p.ExcludeKnown(strings.Split(string(data.Payload), ";")) {
if host == "" {
continue
}
go p.AddRemote(host)
}
p.mu.RLock()
defer p.mu.RUnlock()
hosts := make([]string, 0, len(p.remotes))
for _, r := range p.remotes {
if r.IsHealthy() {
hosts = append(hosts, r.Host)
}
}
resultChan <- MakeFrameWithPayload(RemoteNegotiateResponse, 200, []byte(strings.Join(hosts, ";")))
return nil
}
func (p *SyncedPool) GrainOwnerChangeHandler(data *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
grainSyncCount.Inc()
idAndHostParts := strings.Split(string(data.Payload), ";")
if len(idAndHostParts) != 2 {
log.Printf("Invalid remote grain change message")
resultChan <- MakeFrameWithPayload(AckError, 500, []byte("invalid"))
return nil
}
id := ToCartId(idAndHostParts[0])
host := idAndHostParts[1]
log.Printf("Handling remote grain owner change to %s for id %s", host, id)
for _, r := range p.remotes {
if r.Host == host && r.IsHealthy() {
go p.SpawnRemoteGrain(id, host)
break
}
}
go p.AddRemote(host)
resultChan <- MakeFrameWithPayload(AckChange, 200, []byte("ok"))
return nil
}
func (p *SyncedPool) RemoveRemoteGrain(id CartId) {
p.mu.Lock()
defer p.mu.Unlock()
delete(p.remoteIndex, id)
}
func (p *SyncedPool) SpawnRemoteGrain(id CartId, host string) {
if id.String() == "" {
log.Printf("Invalid grain id, %s", id)
return
}
p.mu.RLock()
localGrain, ok := p.local.grains[id]
p.mu.RUnlock()
if ok && localGrain != nil {
log.Printf("Grain %s already exists locally, owner is (%s)", id, host)
p.mu.Lock()
delete(p.local.grains, id)
p.mu.Unlock()
}
go func(i CartId, h string) {
var pool netpool.Netpooler
p.mu.RLock()
for _, r := range p.remotes {
if r.Host == h {
pool = r.HostPool
break
}
}
p.mu.RUnlock()
if pool == nil {
log.Printf("Error spawning remote grain, no pool for %s", h)
return
}
remoteGrain := NewRemoteGrain(i, h, pool)
p.mu.Lock()
p.remoteIndex[i] = remoteGrain
p.mu.Unlock()
}(id, host)
}
func (p *SyncedPool) HandleHostError(host string) {
p.mu.RLock()
defer p.mu.RUnlock()
for _, r := range p.remotes {
if r.Host == host {
if !r.IsHealthy() {
go p.RemoveHost(r)
}
return
}
}
}
func NewSyncedPool(local *GrainLocalPool, hostname string, discovery Discovery) (*SyncedPool, error) { func NewSyncedPool(local *GrainLocalPool, hostname string, discovery Discovery) (*SyncedPool, error) {
listen := fmt.Sprintf("%s:1338", hostname) p := &SyncedPool{
conn := NewConnection(listen, nil)
server, err := conn.Listen()
if err != nil {
return nil, err
}
log.Printf("Listening on %s", listen)
dh := NewDiscardedHostHandler(1338)
pool := &SyncedPool{
Server: server,
Hostname: hostname, Hostname: hostname,
local: local, local: local,
discardedHostHandler: dh, remoteHosts: make(map[string]*RemoteHostGRPC),
remotes: make(map[string]*RemoteHost), remoteIndex: make(map[CartId]Grain),
remoteIndex: make(map[CartId]*RemoteGrain), discardedHostHandler: NewDiscardedHostHandler(1338),
} }
dh.SetReconnectHandler(pool.AddRemote) p.discardedHostHandler.SetReconnectHandler(p.AddRemote)
server.AddHandler(Ping, pool.PongHandler)
server.AddHandler(GetCartIds, pool.GetCartIdHandler)
server.AddHandler(RemoteNegotiate, pool.NegotiateHandler)
server.AddHandler(RemoteGrainChanged, pool.GrainOwnerChangeHandler)
server.AddHandler(Closing, pool.HostTerminatingHandler)
if discovery != nil { if discovery != nil {
go func() { go func() {
time.Sleep(time.Second * 5) time.Sleep(3 * time.Second) // allow gRPC server startup
log.Printf("Starting discovery") log.Printf("Starting discovery watcher")
ch, err := discovery.Watch() ch, err := discovery.Watch()
if err != nil { if err != nil {
log.Printf("Error discovering hosts: %v", err) log.Printf("Discovery error: %v", err)
return return
} }
for chng := range ch { for evt := range ch {
if chng.Host == "" { if evt.Host == "" {
continue continue
} }
known := pool.IsKnown(chng.Host) switch evt.Type {
if chng.Type != watch.Deleted && !known { case watch.Deleted:
if p.IsKnown(evt.Host) {
log.Printf("Discovered host %s, waiting for startup", chng.Host) p.RemoveHost(evt.Host)
time.Sleep(3 * time.Second) }
pool.AddRemote(chng.Host) default:
if !p.IsKnown(evt.Host) {
} else if chng.Type == watch.Deleted && known { log.Printf("Discovered host %s", evt.Host)
log.Printf("Host removed %s, removing from index", chng.Host) p.AddRemote(evt.Host)
for _, r := range pool.remotes {
if r.Host == chng.Host {
pool.RemoveHost(r)
break
}
} }
} }
} }
}() }()
} else { } else {
log.Printf("No discovery, waiting for remotes to connect") log.Printf("No discovery configured; expecting manual AddRemote or static host injection")
} }
return pool, nil return p, nil
} }
func (p *SyncedPool) HostTerminatingHandler(data *FrameWithPayload, resultChan chan<- FrameWithPayload) error { // ------------------------- Remote Host Management -----------------------------
log.Printf("Remote host terminating")
host := string(data.Payload) // AddRemote dials a remote host and initializes grain proxies.
p.mu.RLock() func (p *SyncedPool) AddRemote(host string) {
defer p.mu.RUnlock() if host == "" || host == p.Hostname {
for _, r := range p.remotes { return
if r.Host == host { }
go p.RemoveHost(r)
p.mu.Lock()
if _, exists := p.remoteHosts[host]; exists {
p.mu.Unlock()
return
}
p.mu.Unlock()
target := fmt.Sprintf("%s:1337", host)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
conn, err := grpc.DialContext(ctx, target, grpc.WithInsecure(), grpc.WithBlock())
if err != nil {
log.Printf("AddRemote: dial %s failed: %v", target, err)
return
}
cartClient := proto.NewCartActorClient(conn)
controlClient := proto.NewControlPlaneClient(conn)
// Health check (Ping) with limited retries
pings := 3
for pings > 0 {
ctxPing, cancelPing := context.WithTimeout(context.Background(), 1*time.Second)
_, pingErr := controlClient.Ping(ctxPing, &proto.Empty{})
cancelPing()
if pingErr == nil {
break break
} }
} pings--
resultChan <- MakeFrameWithPayload(Pong, 200, []byte("ok")) time.Sleep(200 * time.Millisecond)
return nil if pings == 0 {
} log.Printf("AddRemote: ping %s failed after retries: %v", host, pingErr)
conn.Close()
func (p *SyncedPool) IsHealthy() bool { return
for _, r := range p.remotes {
if !r.IsHealthy() {
return false
} }
} }
return true
remote := &RemoteHostGRPC{
Host: host,
Conn: conn,
CartClient: cartClient,
ControlClient: controlClient,
MissedPings: 0,
}
p.mu.Lock()
p.remoteHosts[host] = remote
p.mu.Unlock()
connectedRemotes.Set(float64(p.RemoteCount()))
log.Printf("Connected to remote host %s", host)
go p.pingLoop(remote)
go p.initializeRemote(remote)
go p.Negotiate()
}
// initializeRemote fetches remote cart ids and sets up remote grain proxies.
func (p *SyncedPool) initializeRemote(remote *RemoteHostGRPC) {
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
reply, err := remote.ControlClient.GetCartIds(ctx, &proto.Empty{})
if err != nil {
log.Printf("Init remote %s: GetCartIds error: %v", remote.Host, err)
return
}
count := 0
for _, idStr := range reply.CartIds {
if idStr == "" {
continue
}
p.SpawnRemoteGrain(ToCartId(idStr), remote.Host)
count++
}
log.Printf("Remote %s reported %d grains", remote.Host, count)
}
// RemoveHost removes remote host and its grains.
func (p *SyncedPool) RemoveHost(host string) {
p.mu.Lock()
remote, exists := p.remoteHosts[host]
if exists {
delete(p.remoteHosts, host)
}
// remove grains pointing to host
for id, g := range p.remoteIndex {
if rg, ok := g.(*RemoteGrainGRPC); ok && rg.Host == host {
delete(p.remoteIndex, id)
}
}
p.mu.Unlock()
if exists {
remote.Conn.Close()
}
connectedRemotes.Set(float64(p.RemoteCount()))
}
// RemoteCount returns number of tracked remote hosts.
func (p *SyncedPool) RemoteCount() int {
p.mu.RLock()
defer p.mu.RUnlock()
return len(p.remoteHosts)
} }
func (p *SyncedPool) IsKnown(host string) bool { func (p *SyncedPool) IsKnown(host string) bool {
for _, r := range p.remotes { if host == p.Hostname {
if r.Host == host { return true
return true
}
} }
p.mu.RLock()
return host == p.Hostname defer p.mu.RUnlock()
_, ok := p.remoteHosts[host]
return ok
} }
func (p *SyncedPool) ExcludeKnown(hosts []string) []string { func (p *SyncedPool) ExcludeKnown(hosts []string) []string {
@@ -297,227 +251,190 @@ func (p *SyncedPool) ExcludeKnown(hosts []string) []string {
return ret return ret
} }
func (p *SyncedPool) RemoveHost(host *RemoteHost) { // ------------------------- Health / Ping -------------------------------------
p.mu.Lock()
delete(p.remotes, host.Host)
p.mu.Unlock()
p.RemoveHostMappedCarts(host)
p.discardedHostHandler.AppendHost(host.Host)
connectedRemotes.Set(float64(len(p.remotes)))
}
func (p *SyncedPool) RemoveHostMappedCarts(host *RemoteHost) { func (p *SyncedPool) pingLoop(remote *RemoteHostGRPC) {
p.mu.Lock() ticker := time.NewTicker(3 * time.Second)
defer p.mu.Unlock() defer ticker.Stop()
for id, r := range p.remoteIndex { for range ticker.C {
if r.Host == host.Host { ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
delete(p.remoteIndex, id) _, err := remote.ControlClient.Ping(ctx, &proto.Empty{})
cancel()
if err != nil {
remote.MissedPings++
log.Printf("Ping %s failed (%d)", remote.Host, remote.MissedPings)
if !remote.IsHealthy() {
log.Printf("Remote %s unhealthy, removing", remote.Host)
p.RemoveHost(remote.Host)
return
}
continue
} }
remote.MissedPings = 0
} }
} }
const ( func (p *SyncedPool) IsHealthy() bool {
RemoteNegotiate = FrameType(3) p.mu.RLock()
RemoteGrainChanged = FrameType(4) defer p.mu.RUnlock()
AckChange = FrameType(5) for _, r := range p.remoteHosts {
AckError = FrameType(6) if !r.IsHealthy() {
Ping = FrameType(7) return false
Pong = FrameType(8) }
GetCartIds = FrameType(9) }
CartIdsResponse = FrameType(10) return true
RemoteNegotiateResponse = FrameType(11) }
Closing = FrameType(12)
) // ------------------------- Negotiation ---------------------------------------
func (p *SyncedPool) Negotiate() { func (p *SyncedPool) Negotiate() {
knownHosts := make([]string, 0, len(p.remotes)+1) negotiationCount.Inc()
for _, r := range p.remotes {
knownHosts = append(knownHosts, r.Host)
}
knownHosts = append([]string{p.Hostname}, knownHosts...)
for _, r := range p.remotes { p.mu.RLock()
hosts, err := r.Negotiate(knownHosts) hosts := make([]string, 0, len(p.remoteHosts)+1)
hosts = append(hosts, p.Hostname)
for h := range p.remoteHosts {
hosts = append(hosts, h)
}
remotes := make([]*RemoteHostGRPC, 0, len(p.remoteHosts))
for _, r := range p.remoteHosts {
remotes = append(remotes, r)
}
p.mu.RUnlock()
for _, r := range remotes {
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
reply, err := r.ControlClient.Negotiate(ctx, &proto.NegotiateRequest{KnownHosts: hosts})
cancel()
if err != nil { if err != nil {
log.Printf("Error negotiating with %s: %v\n", r.Host, err) log.Printf("Negotiate with %s failed: %v", r.Host, err)
return continue
} }
for _, h := range hosts { for _, h := range reply.Hosts {
if !p.IsKnown(h) { if !p.IsKnown(h) {
p.AddRemote(h) p.AddRemote(h)
} }
} }
} }
} }
func (p *SyncedPool) GetHealthyRemotes() []*RemoteHost { // ------------------------- Grain Management ----------------------------------
// RemoveRemoteGrain removes a remote grain mapping.
func (p *SyncedPool) RemoveRemoteGrain(id CartId) {
p.mu.Lock()
delete(p.remoteIndex, id)
p.mu.Unlock()
}
// SpawnRemoteGrain creates/updates a remote grain proxy for a given host.
func (p *SyncedPool) SpawnRemoteGrain(id CartId, host string) {
if id.String() == "" {
return
}
p.mu.Lock()
// If local grain exists, remove it (ownership changed)
if g, ok := p.local.grains[id]; ok && g != nil {
delete(p.local.grains, id)
}
remoteHost, ok := p.remoteHosts[host]
if !ok {
p.mu.Unlock()
log.Printf("SpawnRemoteGrain: host %s unknown (id=%s), attempting AddRemote", host, id)
go p.AddRemote(host)
return
}
rg := NewRemoteGrainGRPC(id, host, remoteHost.CartClient)
p.remoteIndex[id] = rg
p.mu.Unlock()
}
// GetHealthyRemotes returns a copy slice of healthy remote hosts.
func (p *SyncedPool) GetHealthyRemotes() []*RemoteHostGRPC {
p.mu.RLock() p.mu.RLock()
defer p.mu.RUnlock() defer p.mu.RUnlock()
remotes := make([]*RemoteHost, 0, len(p.remotes)) ret := make([]*RemoteHostGRPC, 0, len(p.remoteHosts))
for _, r := range p.remotes { for _, r := range p.remoteHosts {
if r.IsHealthy() { if r.IsHealthy() {
remotes = append(remotes, r) ret = append(ret, r)
} }
} }
return remotes return ret
} }
// RequestOwnership attempts to become owner of a cart, requiring quorum.
// On success local grain is (or will be) created; peers spawn remote proxies.
func (p *SyncedPool) RequestOwnership(id CartId) error { func (p *SyncedPool) RequestOwnership(id CartId) error {
ok := 0 ok := 0
all := 0 all := 0
remotes := p.GetHealthyRemotes()
for _, r := range p.GetHealthyRemotes() { for _, r := range remotes {
ctx, cancel := context.WithTimeout(context.Background(), 800*time.Millisecond)
err := r.ConfirmChange(id, p.Hostname) reply, err := r.ControlClient.ConfirmOwner(ctx, &proto.OwnerChangeRequest{
CartId: id.String(),
NewHost: p.Hostname,
})
cancel()
all++ all++
if err != nil { if err != nil || reply == nil || !reply.Accepted {
if !r.IsHealthy() { log.Printf("ConfirmOwner failure from %s for %s: %v (reply=%v)", r.Host, id, err, reply)
log.Printf("Ownership: Removing host, unable to communicate with %s", r.Host)
p.RemoveHost(r)
all--
} else {
log.Printf("Error confirming change: %v from %s\n", err, p.Hostname)
}
continue continue
} }
//log.Printf("Remote confirmed change %s\n", r.Host)
ok++ ok++
} }
// Quorum rule mirrors legacy:
// - If fewer than 3 total, require all.
// - Else require majority (ok >= all/2).
if (all < 3 && ok < all) || ok < (all/2) { if (all < 3 && ok < all) || ok < (all/2) {
p.removeLocalGrain(id) p.removeLocalGrain(id)
return fmt.Errorf("quorum not reached") return fmt.Errorf("quorum not reached (ok=%d all=%d)", ok, all)
} }
grainSyncCount.Inc()
return nil return nil
} }
func (p *SyncedPool) removeLocalGrain(id CartId) { func (p *SyncedPool) removeLocalGrain(id CartId) {
p.mu.Lock() p.mu.Lock()
defer p.mu.Unlock()
delete(p.local.grains, id) delete(p.local.grains, id)
p.mu.Unlock()
} }
func (p *SyncedPool) AddRemote(host string) { // getGrain returns a local or remote grain; if absent, attempts ownership.
p.mu.Lock()
defer p.mu.Unlock()
_, hasHost := p.remotes[host]
if host == "" || hasHost || host == p.Hostname {
return
}
host_pool, err := netpool.New(func() (net.Conn, error) {
return net.Dial("tcp", fmt.Sprintf("%s:1338", host))
}, netpool.WithMaxPool(128), netpool.WithMinPool(0))
if err != nil {
log.Printf("Error creating host pool: %v\n", err)
return
}
client := NewConnection(fmt.Sprintf("%s:1338", host), host_pool)
pings := 3
for pings >= 0 {
_, err = client.Call(Ping, nil)
if err != nil {
log.Printf("Ping failed when adding %s, trying %d more times\n", host, pings)
pings--
time.Sleep(time.Millisecond * 300)
continue
}
break
}
log.Printf("Connected to remote %s", host)
cart_pool, err := netpool.New(func() (net.Conn, error) {
return net.Dial("tcp", fmt.Sprintf("%s:1337", host))
}, netpool.WithMaxPool(128), netpool.WithMinPool(0))
if err != nil {
log.Printf("Error creating grain pool: %v\n", err)
return
}
remote := RemoteHost{
HostPool: cart_pool,
Connection: client,
MissedPings: 0,
Host: host,
}
p.remotes[host] = &remote
connectedRemotes.Set(float64(len(p.remotes)))
go p.HandlePing(&remote)
go remote.Initialize(p)
}
func (p *SyncedPool) HandlePing(remote *RemoteHost) {
for range time.Tick(time.Second * 3) {
err := remote.Ping()
for err != nil {
time.Sleep(time.Millisecond * 200)
if !remote.IsHealthy() {
log.Printf("Removing host, unable to communicate with %s", remote.Host)
p.RemoveHost(remote)
return
}
err = remote.Ping()
}
}
}
func (p *SyncedPool) getGrain(id CartId) (Grain, error) { func (p *SyncedPool) getGrain(id CartId) (Grain, error) {
var err error
p.mu.RLock() p.mu.RLock()
defer p.mu.RUnlock() localGrain, isLocal := p.local.grains[id]
localGrain, ok := p.local.grains[id] remoteGrain, isRemote := p.remoteIndex[id]
if !ok { p.mu.RUnlock()
// check if remote grain exists
remoteGrain, ok := p.remoteIndex[id]
if ok {
remoteLookupCount.Inc()
return remoteGrain, nil
}
go p.RequestOwnership(id)
// if err != nil {
// log.Printf("Error requesting ownership: %v\n", err)
// return nil, err
// }
localGrain, err = p.local.GetGrain(id)
if err != nil {
return nil, err
}
if isLocal && localGrain != nil {
return localGrain, nil
} }
return localGrain, nil if isRemote {
} remoteLookupCount.Inc()
return remoteGrain, nil
func (p *SyncedPool) Close() {
p.mu.Lock()
defer p.mu.Unlock()
payload := []byte(p.Hostname)
for _, r := range p.remotes {
go r.Call(Closing, payload)
} }
}
func (p *SyncedPool) Process(id CartId, messages ...Message) (*FrameWithPayload, error) { // Attempt to claim ownership (async semantics preserved)
pool, err := p.getGrain(id) go p.RequestOwnership(id)
var res *FrameWithPayload
// Create local grain (lazy spawn) - may be rolled back by quorum failure
grain, err := p.local.GetGrain(id)
if err != nil { if err != nil {
return nil, err return nil, err
} }
return grain, nil
}
// Process applies mutation(s) to a grain (local or remote).
func (p *SyncedPool) Process(id CartId, messages ...Message) (*FrameWithPayload, error) {
grain, err := p.getGrain(id)
if err != nil {
return nil, err
}
var res *FrameWithPayload
for _, m := range messages { for _, m := range messages {
res, err = pool.HandleMessage(&m, false) res, err = grain.HandleMessage(&m, false)
if err != nil { if err != nil {
return nil, err return nil, err
} }
@@ -525,11 +442,32 @@ func (p *SyncedPool) Process(id CartId, messages ...Message) (*FrameWithPayload,
return res, nil return res, nil
} }
// Get returns current state of a grain (local or remote).
func (p *SyncedPool) Get(id CartId) (*FrameWithPayload, error) { func (p *SyncedPool) Get(id CartId) (*FrameWithPayload, error) {
grain, err := p.getGrain(id) grain, err := p.getGrain(id)
if err != nil { if err != nil {
return nil, err return nil, err
} }
return grain.GetCurrentState() return grain.GetCurrentState()
} }
// Close notifies remotes this host is terminating.
func (p *SyncedPool) Close() {
p.mu.RLock()
remotes := make([]*RemoteHostGRPC, 0, len(p.remoteHosts))
for _, r := range p.remoteHosts {
remotes = append(remotes, r)
}
p.mu.RUnlock()
for _, r := range remotes {
go func(rh *RemoteHostGRPC) {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
_, err := rh.ControlClient.Closing(ctx, &proto.ClosingNotice{Host: p.Hostname})
cancel()
if err != nil {
log.Printf("Close notify to %s failed: %v", rh.Host, err)
}
}(r)
}
}

66
synced-pool_test.go
View File

@@ -1,66 +0,0 @@
package main
import (
"log"
"testing"
"time"
messages "git.tornberg.me/go-cart-actor/proto"
)
func TestConnection(t *testing.T) {
// TestConnection tests the connection to the server
localPool := NewGrainLocalPool(100, time.Minute, func(id CartId) (*CartGrain, error) {
return &CartGrain{
Id: id,
storageMessages: []Message{},
Items: []*CartItem{},
Deliveries: make([]*CartDelivery, 0),
TotalPrice: 0,
}, nil
})
hg, err := NewGrainHandler(localPool, ":1337")
if err != nil {
t.Errorf("Error creating handler: %v\n", err)
}
if hg == nil {
t.Errorf("Expected handler, got nil")
}
pool, err := NewSyncedPool(localPool, "127.0.0.1", nil)
if err != nil {
t.Errorf("Error creating pool: %v", err)
}
time.Sleep(400 * time.Millisecond)
pool.AddRemote("127.0.0.1")
go pool.Negotiate()
msg := Message{
Type: AddItemType,
//TimeStamp: time.Now().Unix(),
Content: &messages.AddItem{
Quantity: 1,
Price: 100,
Sku: "123",
Name: "Test",
Image: "Test",
},
}
data, err := pool.Process(ToCartId("kalle"), msg)
if err != nil {
t.Errorf("Error getting data: %v", err)
}
if data.StatusCode != 200 {
t.Errorf("Expected 200")
}
log.Println(data)
time.Sleep(2 * time.Millisecond)
data, err = pool.Get(ToCartId("kalle"))
if err != nil {
t.Errorf("Error getting data: %v", err)
}
if data == nil {
t.Errorf("Expected data, got nil")
}
}

232
tcp-connection.go
View File

@@ -1,232 +0,0 @@
package main
import (
"bufio"
"encoding/binary"
"fmt"
"io"
"log"
"net"
"time"
"github.com/yudhasubki/netpool"
)
type Connection struct {
address string
pool netpool.Netpooler
count uint64
}
type FrameType uint32
type StatusCode uint32
type CheckSum uint32
type Frame struct {
Type FrameType
StatusCode StatusCode
Length uint32
Checksum CheckSum
}
func (f *Frame) IsValid() bool {
return f.Checksum == MakeChecksum(f.Type, f.StatusCode, f.Length)
}
func MakeChecksum(msg FrameType, statusCode StatusCode, length uint32) CheckSum {
sum := CheckSum((uint32(msg) + uint32(statusCode) + length) / 8)
return sum
}
type FrameWithPayload struct {
Frame
Payload []byte
}
func MakeFrameWithPayload(msg FrameType, statusCode StatusCode, payload []byte) FrameWithPayload {
len := uint32(len(payload))
return FrameWithPayload{
Frame: Frame{
Type: msg,
StatusCode: statusCode,
Length: len,
Checksum: MakeChecksum(msg, statusCode, len),
},
Payload: payload,
}
}
type FrameData interface {
ToBytes() []byte
FromBytes([]byte) error
}
func NewConnection(address string, pool netpool.Netpooler) *Connection {
return &Connection{
count: 0,
pool: pool,
address: address,
}
}
func SendFrame(conn net.Conn, data *FrameWithPayload) error {
err := binary.Write(conn, binary.LittleEndian, data.Frame)
if err != nil {
return err
}
_, err = conn.Write(data.Payload)
return err
}
func (c *Connection) CallAsync(msg FrameType, payload []byte, ch chan<- FrameWithPayload) (net.Conn, error) {
conn, err := c.pool.Get()
//conn, err := net.Dial("tcp", c.address)
if err != nil {
return conn, err
}
go WaitForFrame(conn, ch)
go func(toSend FrameWithPayload) {
err = SendFrame(conn, &toSend)
if err != nil {
log.Printf("Error sending frame: %v\n", err)
//close(ch)
//conn.Close()
}
}(MakeFrameWithPayload(msg, 1, payload))
c.count++
return conn, err
}
func (c *Connection) Call(msg FrameType, data []byte) (*FrameWithPayload, error) {
ch := make(chan FrameWithPayload, 1)
conn, err := c.CallAsync(msg, data, ch)
defer c.pool.Put(conn, err)
if err != nil {
return nil, err
}
defer close(ch)
ret := <-ch
return &ret, nil
// select {
// case ret := <-ch:
// return &ret, nil
// case <-time.After(MaxCallDuration):
// return nil, fmt.Errorf("timeout waiting for frame")
// }
}
func WaitForFrame(conn net.Conn, resultChan chan<- FrameWithPayload) error {
var err error
var frame Frame
err = binary.Read(conn, binary.LittleEndian, &frame)
if err != nil {
return err
}
if frame.IsValid() {
payload := make([]byte, frame.Length)
_, err = conn.Read(payload)
if err != nil {
conn.Close()
return err
}
resultChan <- FrameWithPayload{
Frame: frame,
Payload: payload,
}
return err
}
log.Println("Checksum mismatch")
return fmt.Errorf("checksum mismatch")
}
type GenericListener struct {
StopListener bool
handlers map[FrameType]func(*FrameWithPayload, chan<- FrameWithPayload) error
}
func (c *Connection) Listen() (*GenericListener, error) {
l, err := net.Listen("tcp", c.address)
if err != nil {
return nil, err
}
ret := &GenericListener{
handlers: make(map[FrameType]func(*FrameWithPayload, chan<- FrameWithPayload) error),
}
go func() {
for !ret.StopListener {
connection, err := l.Accept()
if err != nil {
log.Printf("Error accepting connection: %v\n", err)
continue
}
go ret.HandleConnection(connection)
}
}()
return ret, nil
}
const (
MaxCallDuration = 300 * time.Millisecond
ListenerKeepalive = 5 * time.Second
)
func (l *GenericListener) HandleConnection(conn net.Conn) {
var err error
var frame Frame
log.Printf("Server Connection accepted: %s\n", conn.RemoteAddr().String())
b := bufio.NewReader(conn)
for err != io.EOF {
err = binary.Read(b, binary.LittleEndian, &frame)
if err == nil && frame.IsValid() {
payload := make([]byte, frame.Length)
_, err = b.Read(payload)
if err == nil {
err = l.HandleFrame(conn, &FrameWithPayload{
Frame: frame,
Payload: payload,
})
}
}
}
conn.Close()
log.Printf("Server Connection closed")
}
func (l *GenericListener) AddHandler(msg FrameType, handler func(*FrameWithPayload, chan<- FrameWithPayload) error) {
l.handlers[msg] = handler
}
func (l *GenericListener) HandleFrame(conn net.Conn, frame *FrameWithPayload) error {
handler, ok := l.handlers[frame.Type]
if ok {
go func() {
resultChan := make(chan FrameWithPayload, 1)
defer close(resultChan)
err := handler(frame, resultChan)
if err != nil {
errFrame := MakeFrameWithPayload(frame.Type, 500, []byte(err.Error()))
SendFrame(conn, &errFrame)
log.Printf("Handler returned error: %s", err)
return
}
result := <-resultChan
err = SendFrame(conn, &result)
if err != nil {
log.Printf("Error sending frame: %s", err)
}
}()
} else {
conn.Close()
return fmt.Errorf("no handler for frame type %d", frame.Type)
}
return nil
}

80
tcp-connection_test.go
View File

@@ -1,74 +1,8 @@
/*
Legacy TCP networking (GenericListener / Frame protocol) has been removed
as part of the gRPC migration. This file intentionally contains no tests.
Keeping an empty Go file (with a package declaration) ensures the old
tcp-connection test target no longer runs without causing build issues.
*/
package main package main
import (
"fmt"
"net"
"testing"
"github.com/yudhasubki/netpool"
)
func TestGenericConnection(t *testing.T) {
listenConn := NewConnection("127.0.0.1:51337", nil)
listener, err := listenConn.Listen()
if err != nil {
t.Errorf("Error listening: %v\n", err)
}
pool, err := netpool.New(func() (net.Conn, error) {
return net.Dial("tcp", "127.0.0.1:51337")
}, netpool.WithMaxPool(128), netpool.WithMinPool(16))
if err != nil {
t.Errorf("Error creating pool: %v\n", err)
}
conn := NewConnection("127.0.0.1:51337", pool)
datta := []byte("Hello, world!")
listener.AddHandler(Ping, func(input *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
resultChan <- MakeFrameWithPayload(Pong, 200, nil)
return nil
})
listener.AddHandler(1, func(input *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
resultChan <- MakeFrameWithPayload(2, 200, datta)
return nil
})
listener.AddHandler(3, func(input *FrameWithPayload, resultChan chan<- FrameWithPayload) error {
return fmt.Errorf("Error in custom handler")
})
r, err := conn.Call(1, datta)
if err != nil {
t.Errorf("Error calling: %v\n", err)
}
if r.Type != 2 {
t.Errorf("Expected type 2, got %d\n", r.Type)
}
res, err := conn.Call(3, datta)
if err != nil {
t.Errorf("Did not expect error, got %v\n", err)
return
}
if res.StatusCode == 200 {
t.Errorf("Expected error, got %v\n", res)
}
i := 100
results := make(chan FrameWithPayload, i)
for i > 0 {
go conn.CallAsync(1, datta, results)
i--
}
for i < 100 {
r := <-results
if r.Type != 2 {
t.Errorf("Expected type 2, got %d\n", r.Type)
}
i++
}
response, err := conn.Call(Ping, nil)
if err != nil || response.StatusCode != 200 || response.Type != Pong {
t.Errorf("Error connecting to remote %v, err: %v\n", response, err)
}
}