support multiple mutations

pkg/actor/disk_storage.go

@@ -26,7 +26,7 @@ type DiskStorage[V any] struct {
 
 type LogStorage[V any] interface {
 	LoadEvents(id uint64, grain Grain[V]) error
-	AppendEvent(id uint64, msg proto.Message) error
+	AppendEvent(id uint64, msg ...proto.Message) error
 }
 
 func NewDiskStorage[V any](path string, registry MutationRegistry) *DiskStorage[V] {
@@ -102,14 +102,16 @@ func (s *DiskStorage[V]) Close() {
 	close(s.done)
 }
 
-func (s *DiskStorage[V]) AppendEvent(id uint64, msg proto.Message) error {
+func (s *DiskStorage[V]) AppendEvent(id uint64, msg ...proto.Message) error {
 	if s.queue != nil {
 		queue := make([]QueueEvent, 0)
 		data, found := s.queue.Load(id)
 		if found {
 			queue = data.([]QueueEvent)
 		}
-		queue = append(queue, QueueEvent{Message: msg})
+		for _, m := range msg {
+			queue = append(queue, QueueEvent{Message: m, TimeStamp: time.Now()})
+		}
 		s.queue.Store(id, queue)
 		return nil
 	} else {
@@ -120,8 +122,10 @@ func (s *DiskStorage[V]) AppendEvent(id uint64, msg proto.Message) error {
 			return err
 		}
 		defer fh.Close()
-
-		return s.Append(fh, msg, time.Now())
+		for _, m := range msg {
+			err = s.Append(fh, m, time.Now())
+		}
+		return err
 	}
 
 }