each log function adds a "done" return parameter

weed/filer/filer_notify.go

@@ -87,7 +87,7 @@ func (f *Filer) logMetaEvent(ctx context.Context, fullpath string, eventNotifica
 
 }
 
-func (f *Filer) logFlushFunc(startTime, stopTime time.Time, buf []byte) {
+func (f *Filer) logFlushFunc(logBuffer *log_buffer.LogBuffer, startTime, stopTime time.Time, buf []byte) {
 
 	if len(buf) == 0 {
 		return
@@ -114,7 +114,7 @@ var (
 	VolumeNotFoundPattern = regexp.MustCompile(`volume \d+? not found`)
 )
 
-func (f *Filer) ReadPersistedLogBuffer(startPosition log_buffer.MessagePosition, stopTsNs int64, eachLogEntryFn func(logEntry *filer_pb.LogEntry) error) (lastTsNs int64, isDone bool, err error) {
+func (f *Filer) ReadPersistedLogBuffer(startPosition log_buffer.MessagePosition, stopTsNs int64, eachLogEntryFn log_buffer.EachLogEntryFuncType) (lastTsNs int64, isDone bool, err error) {
 
 	startDate := fmt.Sprintf("%04d-%02d-%02d", startPosition.Year(), startPosition.Month(), startPosition.Day())
 	startHourMinute := fmt.Sprintf("%02d-%02d", startPosition.Hour(), startPosition.Minute())
@@ -177,7 +177,7 @@ func (f *Filer) ReadPersistedLogBuffer(startPosition log_buffer.MessagePosition,
 	return lastTsNs, isDone, nil
 }
 
-func ReadEachLogEntry(r io.Reader, sizeBuf []byte, startTsNs, stopTsNs int64, eachLogEntryFn func(logEntry *filer_pb.LogEntry) error) (lastTsNs int64, err error) {
+func ReadEachLogEntry(r io.Reader, sizeBuf []byte, startTsNs, stopTsNs int64, eachLogEntryFn log_buffer.EachLogEntryFuncType) (lastTsNs int64, err error) {
 	for {
 		n, err := r.Read(sizeBuf)
 		if err != nil {
@@ -207,7 +207,7 @@ func ReadEachLogEntry(r io.Reader, sizeBuf []byte, startTsNs, stopTsNs int64, ea
 			return lastTsNs, err
 		}
 		// println("each log: ", logEntry.TsNs)
-		if err := eachLogEntryFn(logEntry); err != nil {
+		if _, err := eachLogEntryFn(logEntry); err != nil {
 			return lastTsNs, err
 		} else {
 			lastTsNs = logEntry.TsNs

weed/mq/broker/broker_grpc_sub.go

@@ -105,7 +105,7 @@ func (b *MessageQueueBroker) SubscribeMessage(req *mq_pb.SubscribeMessageRequest
 		}
 
 		return true
-	}, func(logEntry *filer_pb.LogEntry) error {
+	}, func(logEntry *filer_pb.LogEntry) (bool, error) {
 		// reset the sleep interval count
 		sleepIntervalCount = 0
 
@@ -118,10 +118,10 @@ func (b *MessageQueueBroker) SubscribeMessage(req *mq_pb.SubscribeMessageRequest
 			},
 		}}); err != nil {
 			glog.Errorf("Error sending setup response: %v", err)
-			return err
+			return false, err
 		}
 
 		counter++
-		return nil
+		return false, nil
 	})
 }

weed/mq/broker/broker_topic_partition_read_write.go

@@ -19,7 +19,7 @@ func (b *MessageQueueBroker) genLogFlushFunc(t topic.Topic, partition *mq_pb.Par
 	partitionGeneration := time.Unix(0, partition.UnixTimeNs).UTC().Format(topic.TIME_FORMAT)
 	partitionDir := fmt.Sprintf("%s/%s/%04d-%04d", topicDir, partitionGeneration, partition.RangeStart, partition.RangeStop)
 
-	return func(startTime, stopTime time.Time, buf []byte) {
+	return func(logBuffer *log_buffer.LogBuffer, startTime, stopTime time.Time, buf []byte) {
 		if len(buf) == 0 {
 			return
 		}
@@ -75,7 +75,7 @@ func (b *MessageQueueBroker) genLogOnDiskReadFunc(t topic.Topic, partition *mq_p
 				return
 			}
 
-			if err = eachLogEntryFn(logEntry); err != nil {
+			if _, err = eachLogEntryFn(logEntry); err != nil {
 				err = fmt.Errorf("process log entry %v: %v", logEntry, err)
 				return
 			}

weed/server/filer_grpc_server_sub_meta.go

@@ -178,19 +178,19 @@ func (fs *FilerServer) SubscribeLocalMetadata(req *filer_pb.SubscribeMetadataReq
 
 }
 
-func eachLogEntryFn(eachEventNotificationFn func(dirPath string, eventNotification *filer_pb.EventNotification, tsNs int64) error) func(logEntry *filer_pb.LogEntry) error {
-	return func(logEntry *filer_pb.LogEntry) error {
+func eachLogEntryFn(eachEventNotificationFn func(dirPath string, eventNotification *filer_pb.EventNotification, tsNs int64) error) log_buffer.EachLogEntryFuncType {
+	return func(logEntry *filer_pb.LogEntry) (bool, error) {
 		event := &filer_pb.SubscribeMetadataResponse{}
 		if err := proto.Unmarshal(logEntry.Data, event); err != nil {
 			glog.Errorf("unexpected unmarshal filer_pb.SubscribeMetadataResponse: %v", err)
-			return fmt.Errorf("unexpected unmarshal filer_pb.SubscribeMetadataResponse: %v", err)
+			return false, fmt.Errorf("unexpected unmarshal filer_pb.SubscribeMetadataResponse: %v", err)
 		}
 
 		if err := eachEventNotificationFn(event.Directory, event.EventNotification, event.TsNs); err != nil {
-			return err
+			return false, err
 		}
 
-		return nil
+		return false, nil
 	}
 }
 

weed/util/log_buffer/log_buffer.go

@@ -22,8 +22,8 @@ type dataToFlush struct {
 	data      *bytes.Buffer
 }
 
-type EachLogEntryFuncType func(logEntry *filer_pb.LogEntry) error
-type LogFlushFuncType func(startTime, stopTime time.Time, buf []byte)
+type EachLogEntryFuncType func(logEntry *filer_pb.LogEntry) (isDone bool, err error)
+type LogFlushFuncType func(logBuffer *LogBuffer, startTime, stopTime time.Time, buf []byte)
 type LogReadFromDiskFuncType func(startPosition MessagePosition, stopTsNs int64, eachLogEntryFn EachLogEntryFuncType) (lastReadPosition MessagePosition, isDone bool, err error)
 
 type LogBuffer struct {
@@ -146,7 +146,7 @@ func (logBuffer *LogBuffer) loopFlush() {
 	for d := range logBuffer.flushChan {
 		if d != nil {
 			// glog.V(4).Infof("%s flush [%v, %v] size %d", m.name, d.startTime, d.stopTime, len(d.data.Bytes()))
-			logBuffer.flushFn(d.startTime, d.stopTime, d.data.Bytes())
+			logBuffer.flushFn(logBuffer, d.startTime, d.stopTime, d.data.Bytes())
 			d.releaseMemory()
 			// local logbuffer is different from aggregate logbuffer here
 			logBuffer.lastFlushTime = d.stopTime

weed/util/log_buffer/log_read.go

@@ -30,7 +30,7 @@ func NewMessagePosition(tsNs int64, batchIndex int64) MessagePosition {
 }
 
 func (logBuffer *LogBuffer) LoopProcessLogData(readerName string, startPosition MessagePosition, stopTsNs int64,
-	waitForDataFn func() bool, eachLogDataFn func(logEntry *filer_pb.LogEntry) error) (lastReadPosition MessagePosition, isDone bool, err error) {
+	waitForDataFn func() bool, eachLogDataFn EachLogEntryFuncType) (lastReadPosition MessagePosition, isDone bool, err error) {
 	// loop through all messages
 	var bytesBuf *bytes.Buffer
 	var batchIndex int64
@@ -69,6 +69,7 @@ func (logBuffer *LogBuffer) LoopProcessLogData(readerName string, startPosition
 			if waitForDataFn() {
 				continue
 			} else {
+				isDone = true
 				return
 			}
 		}
@@ -101,10 +102,13 @@ func (logBuffer *LogBuffer) LoopProcessLogData(readerName string, startPosition
 			}
 			lastReadPosition = NewMessagePosition(logEntry.TsNs, batchIndex)
 
-			if err = eachLogDataFn(logEntry); err != nil {
+			if isDone, err = eachLogDataFn(logEntry); err != nil {
 				glog.Errorf("LoopProcessLogData: %s process log entry %d %v: %v", readerName, batchSize+1, logEntry, err)
 				return
 			}
+			if isDone {
+				return
+			}
 
 			pos += 4 + int(size)
 			batchSize++