basic pub and sub works!

weed/messaging/broker/broker_grpc_server_publish.go

@@ -1,13 +1,11 @@
 package broker
 
 import (
-	"fmt"
 	"io"
 	"time"
 
 	"github.com/golang/protobuf/proto"
 
-	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
 )
@@ -47,20 +45,7 @@ func (broker *MessageBroker) Publish(stream messaging_pb.SeaweedMessaging_Publis
 		Topic:     in.Init.Topic,
 		Partition: in.Init.Partition,
 	}
-	logBuffer := broker.topicLocks.RequestPublisherLock(tp, func(startTime, stopTime time.Time, buf []byte) {
-
-		targetFile := fmt.Sprintf(
-			"%s/%s/%s/%04d-%02d-%02d/%02d-%02d.part%02d",
-			filer2.TopicsDir, tp.Namespace, tp.Topic,
-			startTime.Year(), startTime.Month(), startTime.Day(), startTime.Hour(), startTime.Minute(),
-			tp.Partition,
-		)
-
-		if err := broker.appendToFile(targetFile, topicConfig, buf); err != nil {
-			glog.V(0).Infof("log write failed %s: %v", targetFile, err)
-		}
-
-	})
+	tl := broker.topicLocks.RequestLock(tp, topicConfig, true)
 	defer broker.topicLocks.ReleaseLock(tp, true)
 
 	updatesChan := make(chan int32)
@@ -78,7 +63,6 @@ func (broker *MessageBroker) Publish(stream messaging_pb.SeaweedMessaging_Publis
 		}
 	}()
 
-
 	// process each message
 	for {
 		in, err := stream.Recv()
@@ -100,7 +84,7 @@ func (broker *MessageBroker) Publish(stream messaging_pb.SeaweedMessaging_Publis
 			Headers:   in.Data.Headers,
 		}
 
-		println("received message:", string(in.Data.Value))
+		// fmt.Printf("received: %d : %s\n", len(m.Value), string(m.Value))
 
 		data, err := proto.Marshal(m)
 		if err != nil {
@@ -108,7 +92,7 @@ func (broker *MessageBroker) Publish(stream messaging_pb.SeaweedMessaging_Publis
 			continue
 		}
 
-		logBuffer.AddToBuffer(in.Data.Key, data)
+		tl.logBuffer.AddToBuffer(in.Data.Key, data)
 
 	}
 }

weed/messaging/broker/broker_grpc_server_subscribe.go

@@ -2,12 +2,12 @@ package broker
 
 import (
 	"io"
-	"sync"
 	"time"
 
 	"github.com/golang/protobuf/proto"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -24,6 +24,12 @@ func (broker *MessageBroker) Subscribe(stream messaging_pb.SeaweedMessaging_Subs
 	}
 
 	subscriberId := in.Init.SubscriberId
+	println("+ subscriber:", subscriberId)
+	defer println("- subscriber:", subscriberId)
+
+	// TODO look it up
+	topicConfig := &messaging_pb.TopicConfiguration{
+	}
 
 	// get lock
 	tp := TopicPartition{
@@ -31,9 +37,8 @@ func (broker *MessageBroker) Subscribe(stream messaging_pb.SeaweedMessaging_Subs
 		Topic:     in.Init.Topic,
 		Partition: in.Init.Partition,
 	}
-	lock := broker.topicLocks.RequestSubscriberLock(tp)
+	lock := broker.topicLocks.RequestLock(tp, topicConfig, false)
 	defer broker.topicLocks.ReleaseLock(tp, false)
-	cond := sync.NewCond(&lock.Mutex)
 
 	lastReadTime := time.Now()
 	switch in.Init.StartPosition {
@@ -65,13 +70,21 @@ func (broker *MessageBroker) Subscribe(stream messaging_pb.SeaweedMessaging_Subs
 			size := util.BytesToUint32(buf[pos : pos+4])
 			entryData := buf[pos+4 : pos+4+int(size)]
 
+			logEntry := &filer_pb.LogEntry{}
+			if err = proto.Unmarshal(entryData, logEntry); err != nil {
+				glog.Errorf("unexpected unmarshal messaging_pb.Message: %v", err)
+				pos += 4 + int(size)
+				continue
+			}
+
 			m := &messaging_pb.Message{}
-			if err = proto.Unmarshal(entryData, m); err != nil {
+			if err = proto.Unmarshal(logEntry.Data, m); err != nil {
 				glog.Errorf("unexpected unmarshal messaging_pb.Message: %v", err)
 				pos += 4 + int(size)
 				continue
 			}
 
+			// fmt.Printf("sending : %d : %s\n", len(m.Value), string(m.Value))
 			if err = eachMessageFn(m); err != nil {
 				return err
 			}
@@ -81,7 +94,7 @@ func (broker *MessageBroker) Subscribe(stream messaging_pb.SeaweedMessaging_Subs
 		}
 
 		lock.Mutex.Lock()
-		cond.Wait()
+		lock.cond.Wait()
 		lock.Mutex.Unlock()
 	}
 

weed/messaging/broker/broker_server.go

@@ -31,9 +31,10 @@ func NewMessageBroker(option *MessageBrokerOption, grpcDialOption grpc.DialOptio
 	messageBroker = &MessageBroker{
 		option:         option,
 		grpcDialOption: grpcDialOption,
-		topicLocks:     NewTopicLocks(),
 	}
 
+	messageBroker.topicLocks = NewTopicLocks(messageBroker)
+
 	messageBroker.checkPeers()
 
 	// go messageBroker.loopForEver()

weed/messaging/broker/topic_lock.go

@@ -1,9 +1,13 @@
 package broker
 
 import (
+	"fmt"
 	"sync"
 	"time"
 
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
 	"github.com/chrislusf/seaweedfs/weed/util/log_buffer"
 )
 
@@ -14,6 +18,7 @@ type TopicPartition struct {
 }
 type TopicLock struct {
 	sync.Mutex
+	cond *sync.Cond
 	subscriberCount int
 	publisherCount  int
 	logBuffer       *log_buffer.LogBuffer
@@ -22,43 +27,55 @@ type TopicLock struct {
 type TopicLocks struct {
 	sync.Mutex
 	locks  map[TopicPartition]*TopicLock
+	broker *MessageBroker
 }
 
-func NewTopicLocks() *TopicLocks {
+func NewTopicLocks(messageBroker *MessageBroker) *TopicLocks {
 	return &TopicLocks{
 		locks:  make(map[TopicPartition]*TopicLock),
+		broker: messageBroker,
 	}
 }
 
-func (tl *TopicLocks) RequestSubscriberLock(partition TopicPartition) *TopicLock {
-	tl.Lock()
-	defer tl.Unlock()
+func (locks *TopicLocks) buildLogBuffer(tl *TopicLock, tp TopicPartition, topicConfig *messaging_pb.TopicConfiguration) *log_buffer.LogBuffer {
 
-	lock, found := tl.locks[partition]
-	if !found {
-		lock = &TopicLock{}
-		tl.locks[partition] = lock
+	flushFn := func(startTime, stopTime time.Time, buf []byte) {
+
+		targetFile := fmt.Sprintf(
+			"%s/%s/%s/%04d-%02d-%02d/%02d-%02d.part%02d",
+			filer2.TopicsDir, tp.Namespace, tp.Topic,
+			startTime.Year(), startTime.Month(), startTime.Day(), startTime.Hour(), startTime.Minute(),
+			tp.Partition,
+		)
+
+		if err := locks.broker.appendToFile(targetFile, topicConfig, buf); err != nil {
+			glog.V(0).Infof("log write failed %s: %v", targetFile, err)
 		}
-	lock.subscriberCount++
+	}
+	logBuffer := log_buffer.NewLogBuffer(time.Minute, flushFn, func() {
+		tl.cond.Broadcast()
+	})
 
-	return lock
+	return logBuffer
 }
 
-func (tl *TopicLocks) RequestPublisherLock(partition TopicPartition, flushFn func(startTime, stopTime time.Time, buf []byte)) *log_buffer.LogBuffer {
+func (tl *TopicLocks) RequestLock(partition TopicPartition, topicConfig *messaging_pb.TopicConfiguration, isPublisher bool) *TopicLock {
 	tl.Lock()
 	defer tl.Unlock()
 
 	lock, found := tl.locks[partition]
 	if !found {
 		lock = &TopicLock{}
+		lock.cond = sync.NewCond(&lock.Mutex)
 		tl.locks[partition] = lock
+		lock.logBuffer = tl.buildLogBuffer(lock, partition, topicConfig)
 	}
+	if isPublisher {
 		lock.publisherCount++
-	cond := sync.NewCond(&lock.Mutex)
-	lock.logBuffer = log_buffer.NewLogBuffer(time.Minute, flushFn, func() {
-		cond.Broadcast()
-	})
-	return lock.logBuffer
+	} else {
+		lock.subscriberCount++
+	}
+	return lock
 }
 
 func (tl *TopicLocks) ReleaseLock(partition TopicPartition, isPublisher bool) {