better

cmd/cart/event_log.go

@@ -5,12 +5,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"log"
 	"os"
 	"path/filepath"
 	"reflect"
 	"sync"
 	"time"
 
+	"git.tornberg.me/go-cart-actor/pkg/actor"
 	messages "git.tornberg.me/go-cart-actor/pkg/messages"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
@@ -205,7 +207,7 @@ func AppendCartEvent(id CartId, mutation interface{}) error {
 
 // ReplayCartEvents replays an existing cart's event log into the provided grain.
 // It applies mutation payloads in order, skipping unknown types.
-func ReplayCartEvents(grain *CartGrain, id CartId) error {
+func ReplayCartEvents(grain *CartGrain, id CartId, registry actor.MutationRegistry) error {
 	start := time.Now()
 	path := EventLogPath(id)
 	if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
@@ -237,18 +239,19 @@ func ReplayCartEvents(grain *CartGrain, id CartId) error {
 			eventReplayFailuresTotal.Inc()
 			continue // skip malformed line
 		}
-		factory, ok := eventTypeFactories[raw.Type]
+
+		instance, ok := registry.Create(raw.Type)
 		if !ok {
-			eventUnknownTypesTotal.Inc()
-			continue // skip unknown mutation type
+			log.Printf("loading failed for unknown mutation type: %s", raw.Type)
+			eventReplayFailuresTotal.Inc()
+			continue // skip unknown type
 		}
-		instance := factory()
 		if err := json.Unmarshal(raw.Payload, instance); err != nil {
 			eventMutationErrorsTotal.Inc()
 			continue
 		}
 		// Apply mutation directly using internal registration (bypass AppendCartEvent recursion).
-		if _, applyErr := ApplyRegistered(grain, instance); applyErr != nil {
+		if applyErr := registry.Apply(grain, instance); applyErr != nil {
 			eventMutationErrorsTotal.Inc()
 			continue
 		} else {