fixup message options and content-type header

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

README.md

@@ -1,2 +1,2 @@
 # micro-broker-kgo
-![Coverage](https://img.shields.io/badge/Coverage-63.0%25-yellow)
+![Coverage](https://img.shields.io/badge/Coverage-62.9%25-yellow)

kgo.go

@@ -156,7 +156,7 @@ func (b *Broker) NewMessage(ctx context.Context, hdr metadata.Metadata, body int
 		options.ContentType = b.opts.ContentType
 	}
 
-	m := &kgoMessage{ctx: ctx, hdr: hdr, opts: options}
+	m := &kgoMessage{ctx: ctx, hdr: hdr.Copy(), opts: options}
 	c, err := b.newCodec(m.opts.ContentType)
 	if err == nil {
 		m.body, err = c.Marshal(body)
@@ -165,6 +165,8 @@ func (b *Broker) NewMessage(ctx context.Context, hdr metadata.Metadata, body int
 		return nil, err
 	}
 
+	m.hdr.Set(metadata.HeaderContentType, m.opts.ContentType)
+
 	return m, nil
 }
 
@@ -344,40 +346,44 @@ func (b *Broker) fnPublish(ctx context.Context, topic string, messages ...broker
 }
 
 func (b *Broker) publish(ctx context.Context, topic string, messages ...broker.Message) error {
-	records := make([]*kgo.Record, 0, len(messages))
+	var records []*kgo.Record
-	var errs []string
-	var key []byte
-	var promise func(*kgo.Record, error)
 
 	for _, msg := range messages {
-		if mctx := msg.Context(); mctx != nil {
-			if k, ok := mctx.Value(messageKey{}).([]byte); ok && k != nil {
-				key = k
-			}
-			if p, ok := mctx.Value(messagePromiseKey{}).(func(*kgo.Record, error)); ok && p != nil {
-				promise = p
-			}
-		}
 
 		rec := &kgo.Record{
-			Context: ctx,
+			Context: msg.Context(),
-			Key:     key,
 			Topic:   topic,
 			Value:   msg.Body(),
 		}
 
-		b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", rec.Topic, "topic", rec.Topic).Inc()
+		var promise func(*kgo.Record, error)
+		if rec.Context != nil {
+			if k, ok := rec.Context.Value(messageKey{}).([]byte); ok && k != nil {
+				rec.Key = k
+			}
+			if p, ok := rec.Context.Value(messagePromiseKey{}).(func(*kgo.Record, error)); ok && p != nil {
+				promise = p
+			}
+		}
+
+		kmsg, ok := msg.(*kgoMessage)
+		if !ok {
+			continue
+		}
+		if kmsg.opts.Context != nil {
+			if k, ok := kmsg.opts.Context.Value(messageKey{}).([]byte); ok && k != nil {
+				rec.Key = k
+			}
+			if p, ok := kmsg.opts.Context.Value(messagePromiseKey{}).(func(*kgo.Record, error)); ok && p != nil {
+				promise = p
+			}
+		}
 
 		setHeaders(rec, msg.Header())
 
-		records = append(records, rec)
+		if promise != nil {
-	}
+			ts := time.Now()
-
+			b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", rec.Topic, "topic", rec.Topic).Inc()
-	ts := time.Now()
-
-	if promise != nil {
-
-		for _, rec := range records {
 			b.c.Produce(ctx, rec, func(r *kgo.Record, err error) {
 				te := time.Since(ts)
 				b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", rec.Topic, "topic", rec.Topic).Dec()
@@ -390,27 +396,33 @@ func (b *Broker) publish(ctx context.Context, topic string, messages ...broker.M
 				}
 				promise(r, err)
 			})
-		}
+			continue
-		return nil
-	}
-
-	results := b.c.ProduceSync(ctx, records...)
-
-	te := time.Since(ts)
-	for _, result := range results {
-		b.opts.Meter.Summary(semconv.PublishMessageLatencyMicroseconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
-		b.opts.Meter.Histogram(semconv.PublishMessageDurationSeconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
-		b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Dec()
-		if result.Err != nil {
-			b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "failure").Inc()
-			errs = append(errs, result.Err.Error())
 		} else {
-			b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "success").Inc()
+			records = append(records, rec)
 		}
 	}
 
-	if len(errs) > 0 {
+	if len(records) > 0 {
-		return fmt.Errorf("publish error: %s", strings.Join(errs, "\n"))
+		var errs []string
+		ts := time.Now()
+		b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", topic, "topic", topic).Set(uint64(len(records)))
+		results := b.c.ProduceSync(ctx, records...)
+		te := time.Since(ts)
+		for _, result := range results {
+			b.opts.Meter.Summary(semconv.PublishMessageLatencyMicroseconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
+			b.opts.Meter.Histogram(semconv.PublishMessageDurationSeconds, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Update(te.Seconds())
+			b.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", result.Record.Topic, "topic", result.Record.Topic).Dec()
+			if result.Err != nil {
+				b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "failure").Inc()
+				errs = append(errs, result.Err.Error())
+			} else {
+				b.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", result.Record.Topic, "topic", result.Record.Topic, "status", "success").Inc()
+			}
+		}
+
+		if len(errs) > 0 {
+			return fmt.Errorf("publish error: %s", strings.Join(errs, "\n"))
+		}
 	}
 
 	return nil

kgo_test.go

@@ -81,7 +81,7 @@ func TestFail(t *testing.T) {
 	go func() {
 		for _, msg := range msgs {
 			//		t.Logf("broker publish")
-			if err := b.Publish(ctx, "test", msg); err != nil {
+			if err := b.Publish(ctx, "test.fail", msg); err != nil {
 				t.Fatal(err)
 			}
 		}
@@ -96,7 +96,7 @@ func TestFail(t *testing.T) {
 		return msg.Ack()
 	}
 
-	sub, err := b.Subscribe(ctx, "test", fn,
+	sub, err := b.Subscribe(ctx, "test.fail", fn,
 		broker.SubscribeAutoAck(true),
 		broker.SubscribeGroup(group),
 		broker.SubscribeBodyOnly(true))
@@ -184,7 +184,7 @@ func TestPubSub(t *testing.T) {
 			msgs = append(msgs, m)
 		}
 
-		if err := b.Publish(ctx, "test", msgs...); err != nil {
+		if err := b.Publish(ctx, "test.pubsub", msgs...); err != nil {
 			t.Fatal(err)
 		}
 		//	t.Skip()
@@ -197,7 +197,7 @@ func TestPubSub(t *testing.T) {
 		return msg.Ack()
 	}
 
-	sub, err := b.Subscribe(ctx, "test", fn,
+	sub, err := b.Subscribe(ctx, "test.pubsub", fn,
 		broker.SubscribeAutoAck(true),
 		broker.SubscribeGroup(group),
 		broker.SubscribeBodyOnly(true))

options.go

@@ -116,10 +116,3 @@ type subscribeMessagePoolKey struct{}
 func SubscribeMessagePool(b bool) broker.SubscribeOption {
 	return broker.SetSubscribeOption(subscribeMessagePoolKey{}, b)
 }
-
-type subscribeMessagePoolKey struct{}
-
-// SubscribeMessagePool optionaly enabled/disable message pool
-func SubscribeMessagePool(b bool) broker.SubscribeOption {
-	return broker.SetSubscribeOption(subscribeMessagePoolKey{}, b)
-}

subscriber.go

@@ -39,7 +39,6 @@ type consumer struct {
 }
 
 type Subscriber struct {
-<<<<<<< HEAD
 	consumers    map[tp]*consumer
 	c            *kgo.Client
 	htracer      *hookTracer