mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-15 11:09:06 +08:00
119 lines
3.3 KiB
Go
119 lines
3.3 KiB
Go
package log_buffer
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"time"
|
|
|
|
"google.golang.org/protobuf/proto"
|
|
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
|
|
"github.com/seaweedfs/seaweedfs/weed/util"
|
|
)
|
|
|
|
var (
|
|
ResumeError = fmt.Errorf("resume")
|
|
ResumeFromDiskError = fmt.Errorf("resumeFromDisk")
|
|
)
|
|
|
|
type MessagePosition struct {
|
|
time.Time // this is the timestamp of the message
|
|
BatchIndex int64 // this is only used when the timestamp is not enough to identify the next message, when the timestamp is in the previous batch.
|
|
}
|
|
|
|
func NewMessagePosition(tsNs int64, batchIndex int64) MessagePosition {
|
|
return MessagePosition{
|
|
Time: time.Unix(0, tsNs).UTC(),
|
|
BatchIndex: batchIndex,
|
|
}
|
|
}
|
|
|
|
func (logBuffer *LogBuffer) LoopProcessLogData(readerName string, startPosition MessagePosition, inMemoryOnly bool, stopTsNs int64,
|
|
waitForDataFn func() bool, eachLogDataFn func(logEntry *filer_pb.LogEntry) error) (lastReadPosition MessagePosition, isDone bool, err error) {
|
|
// loop through all messages
|
|
var bytesBuf *bytes.Buffer
|
|
var batchIndex int64
|
|
lastReadPosition = startPosition
|
|
var entryCounter int64
|
|
defer func() {
|
|
if bytesBuf != nil {
|
|
logBuffer.ReleaseMemory(bytesBuf)
|
|
}
|
|
println("LoopProcessLogData", readerName, "sent messages total", entryCounter)
|
|
}()
|
|
|
|
for {
|
|
|
|
if bytesBuf != nil {
|
|
logBuffer.ReleaseMemory(bytesBuf)
|
|
}
|
|
bytesBuf, batchIndex, err = logBuffer.ReadFromBuffer(lastReadPosition, inMemoryOnly)
|
|
if err == ResumeFromDiskError {
|
|
time.Sleep(1127 * time.Millisecond)
|
|
return lastReadPosition, isDone, ResumeFromDiskError
|
|
}
|
|
readSize := 0
|
|
if bytesBuf != nil {
|
|
readSize = bytesBuf.Len()
|
|
}
|
|
glog.V(0).Infof("%s ReadFromBuffer at %v batch:%d, read bytes:%v batch:%d", readerName, lastReadPosition, lastReadPosition.BatchIndex, readSize, batchIndex)
|
|
if bytesBuf == nil {
|
|
if batchIndex >= 0 {
|
|
lastReadPosition = NewMessagePosition(lastReadPosition.UnixNano(), batchIndex)
|
|
}
|
|
if stopTsNs != 0 {
|
|
isDone = true
|
|
return
|
|
}
|
|
if waitForDataFn() {
|
|
continue
|
|
} else {
|
|
return
|
|
}
|
|
}
|
|
|
|
buf := bytesBuf.Bytes()
|
|
// fmt.Printf("ReadFromBuffer %s by %v size %d\n", readerName, lastReadPosition, len(buf))
|
|
|
|
batchSize := 0
|
|
|
|
for pos := 0; pos+4 < len(buf); {
|
|
|
|
size := util.BytesToUint32(buf[pos : pos+4])
|
|
if pos+4+int(size) > len(buf) {
|
|
err = ResumeError
|
|
glog.Errorf("LoopProcessLogData: %s read buffer %v read %d entries [%d,%d) from [0,%d)", readerName, lastReadPosition, batchSize, pos, pos+int(size)+4, len(buf))
|
|
return
|
|
}
|
|
entryData := buf[pos+4 : pos+4+int(size)]
|
|
|
|
logEntry := &filer_pb.LogEntry{}
|
|
if err = proto.Unmarshal(entryData, logEntry); err != nil {
|
|
glog.Errorf("unexpected unmarshal mq_pb.Message: %v", err)
|
|
pos += 4 + int(size)
|
|
continue
|
|
}
|
|
if stopTsNs != 0 && logEntry.TsNs > stopTsNs {
|
|
isDone = true
|
|
println("stopTsNs", stopTsNs, "logEntry.TsNs", logEntry.TsNs)
|
|
return
|
|
}
|
|
lastReadPosition = NewMessagePosition(logEntry.TsNs, batchIndex)
|
|
|
|
if err = eachLogDataFn(logEntry); err != nil {
|
|
glog.Errorf("LoopProcessLogData: %s process log entry %d %v: %v", readerName, batchSize+1, logEntry, err)
|
|
return
|
|
}
|
|
|
|
pos += 4 + int(size)
|
|
batchSize++
|
|
entryCounter++
|
|
|
|
}
|
|
|
|
glog.V(0).Infof("%s sent messages ts[%+v,%+v] size %d\n", readerName, startPosition, lastReadPosition, batchSize)
|
|
}
|
|
|
|
}
|