Only ack postprocessing events after persisting

services/postprocessing/pkg/service/service.go

@@ -13,6 +13,8 @@ import (
 	"github.com/opencloud-eu/opencloud/services/postprocessing/pkg/postprocessing"
 	ctxpkg "github.com/opencloud-eu/reva/v2/pkg/ctx"
 	"github.com/opencloud-eu/reva/v2/pkg/events"
+	"github.com/opencloud-eu/reva/v2/pkg/events/raw"
+	"github.com/opencloud-eu/reva/v2/pkg/events/stream"
 	"github.com/opencloud-eu/reva/v2/pkg/utils"
 	"go-micro.dev/v4/store"
 	"go.opentelemetry.io/otel/trace"
@@ -22,7 +24,7 @@ import (
 type PostprocessingService struct {
 	ctx    context.Context
 	log    log.Logger
-	events <-chan events.Event
+	events <-chan raw.Event
 	pub    events.Publisher
 	steps  []events.Postprocessingstep
 	store  store.Store
@@ -40,14 +42,27 @@ var (
 )
 
 // NewPostprocessingService returns a new instance of a postprocessing service
-func NewPostprocessingService(ctx context.Context, stream events.Stream, logger log.Logger, sto store.Store, tp trace.TracerProvider, c config.Postprocessing) (*PostprocessingService, error) {
-	evs, err := events.Consume(stream, "postprocessing",
+func NewPostprocessingService(ctx context.Context, logger log.Logger, sto store.Store, tp trace.TracerProvider, cfg *config.Config) (*PostprocessingService, error) {
+	pub, err := stream.NatsFromConfig(cfg.Service.Name, false, stream.NatsConfig(cfg.Postprocessing.Events))
+	if err != nil {
+		return nil, err
+	}
+	raw, err := raw.FromConfig(ctx, cfg.Service.Name, raw.Config{
+		Endpoint:             cfg.Postprocessing.Events.Endpoint,
+		Cluster:              cfg.Postprocessing.Events.Cluster,
+		EnableTLS:            cfg.Postprocessing.Events.EnableTLS,
+		TLSInsecure:          cfg.Postprocessing.Events.TLSInsecure,
+		TLSRootCACertificate: cfg.Postprocessing.Events.TLSRootCACertificate,
+		AuthUsername:         cfg.Postprocessing.Events.AuthUsername,
+		AuthPassword:         cfg.Postprocessing.Events.AuthPassword,
+	})
+
+	evs, err := raw.Consume("postprocessing-pull",
 		events.BytesReceived{},
 		events.StartPostprocessingStep{},
 		events.UploadReady{},
 		events.PostprocessingStepFinished{},
-		events.ResumePostprocessing{},
-	)
+		events.ResumePostprocessing{})
 	if err != nil {
 		return nil, err
 	}
@@ -56,10 +71,10 @@ func NewPostprocessingService(ctx context.Context, stream events.Stream, logger
 		ctx:    ctx,
 		log:    logger,
 		events: evs,
-		pub:    stream,
-		steps:  getSteps(c),
+		pub:    pub,
+		steps:  getSteps(cfg.Postprocessing),
 		store:  sto,
-		c:      c,
+		c:      cfg.Postprocessing,
 		tp:     tp,
 	}, nil
 }
@@ -91,7 +106,7 @@ func (pps *PostprocessingService) Run() error {
 	return nil
 }
 
-func (pps *PostprocessingService) processEvent(e events.Event) error {
+func (pps *PostprocessingService) processEvent(e raw.Event) error {
 	var (
 		next interface{}
 		pp   *postprocessing.Postprocessing
@@ -102,7 +117,16 @@ func (pps *PostprocessingService) processEvent(e events.Event) error {
 	ctx, span := pps.tp.Tracer("postprocessing").Start(ctx, "processEvent")
 	defer span.End()
 
-	switch ev := e.Event.(type) {
+	ackEvent := true
+	defer func() {
+		if ackEvent {
+			if err := e.Ack(); err != nil {
+				pps.log.Error().Err(err).Msg("unable to ack event")
+			}
+		}
+	}()
+
+	switch ev := e.Event.Event.(type) {
 	case events.BytesReceived:
 		pp = &postprocessing.Postprocessing{
 			ID:                ev.UploadID,
@@ -189,6 +213,7 @@ func (pps *PostprocessingService) processEvent(e events.Event) error {
 		ctx = ctxpkg.ContextSetInitiator(ctx, pp.InitiatorID)
 
 		if err := storePP(pps.store, pp); err != nil {
+			ackEvent = false
 			pps.log.Error().Str("uploadID", pp.ID).Err(err).Msg("cannot store upload")
 			return fmt.Errorf("%w: cannot store upload", ErrEvent)
 		}