ConcurrentPartitionLimit

weed/mq/client/cmd/weed_sub_kv/subscriber_kv.go

@@ -44,10 +44,10 @@ func main() {
 	subscriber := sub_client.NewTopicSubscriber(brokers, subscriberConfig, contentConfig, processorConfig)
 
 	counter := 0
-	subscriber.SetEachMessageFunc(func(key, value []byte) (bool, error) {
+	subscriber.SetEachMessageFunc(func(key, value []byte) (error) {
 		counter++
 		println(string(key), "=>", string(value), counter)
-		return true, nil
+		return nil
 	})
 
 	subscriber.SetCompletionFunc(func() {

weed/mq/client/cmd/weed_sub_record/subscriber_record.go

@@ -70,12 +70,12 @@ func main() {
 	subscriber := sub_client.NewTopicSubscriber(brokers, subscriberConfig, contentConfig, processorConfig)
 
 	counter := 0
-	subscriber.SetEachMessageFunc(func(key, value []byte) (bool, error) {
+	subscriber.SetEachMessageFunc(func(key, value []byte) (error) {
 		counter++
 		record := &schema_pb.RecordValue{}
 		proto.Unmarshal(value, record)
 		fmt.Printf("record: %v\n", record)
-		return true, nil
+		return nil
 	})
 
 	subscriber.SetCompletionFunc(func() {

weed/mq/client/sub_client/connect_to_sub_coordinator.go

@@ -6,6 +6,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util"
 	"io"
 	"time"
 )
@@ -119,11 +120,16 @@ func (sub *TopicSubscriber) onEachPartition(assigned *mq_pb.BrokerPartitionAssig
 		}
 
 		partitionOffsetChan:= make(chan int64, 1024)
-
 		defer func() {
 			close(partitionOffsetChan)
 		}()
 
+		concurrentPartitionLimit := int(sub.ProcessorConfig.ConcurrentPartitionLimit)
+		if concurrentPartitionLimit <= 0 {
+			concurrentPartitionLimit = 1
+		}
+		executors := util.NewLimitedConcurrentExecutor(concurrentPartitionLimit)
+
 		go func() {
 			for ack := range partitionOffsetChan {
 				subscribeClient.SendMsg(&mq_pb.SubscribeMessageRequest{
@@ -137,7 +143,9 @@ func (sub *TopicSubscriber) onEachPartition(assigned *mq_pb.BrokerPartitionAssig
 			subscribeClient.CloseSend()
 		}()
 
-		for {
+		var lastErr error
+
+		for lastErr != nil {
 			// glog.V(0).Infof("subscriber %s/%s/%s waiting for message", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup)
 			resp, err := subscribeClient.Recv()
 			if err != nil {
@@ -149,14 +157,14 @@ func (sub *TopicSubscriber) onEachPartition(assigned *mq_pb.BrokerPartitionAssig
 			}
 			switch m := resp.Message.(type) {
 			case *mq_pb.SubscribeMessageResponse_Data:
-				shouldContinue, processErr := sub.OnEachMessageFunc(m.Data.Key, m.Data.Value)
-				if processErr != nil {
-					return fmt.Errorf("process error: %v", processErr)
-				}
+				executors.Execute(func() {
+					processErr := sub.OnEachMessageFunc(m.Data.Key, m.Data.Value)
+					if processErr == nil {
 						partitionOffsetChan <- m.Data.TsNs
-				if !shouldContinue {
-					return nil
+					}else{
+						lastErr = processErr
 					}
+				})
 			case *mq_pb.SubscribeMessageResponse_Ctrl:
 				// glog.V(0).Infof("subscriber %s/%s/%s received control %+v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, m.Ctrl)
 				if m.Ctrl.IsEndOfStream || m.Ctrl.IsEndOfTopic {
@@ -165,6 +173,6 @@ func (sub *TopicSubscriber) onEachPartition(assigned *mq_pb.BrokerPartitionAssig
 			}
 		}
 
-		return nil
+		return lastErr
 	})
 }