seaweedfs/weed/filesys/dirty_pages_temp_file.go

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package filesys
import (
"fmt"
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"github.com/chrislusf/seaweedfs/weed/filesys/page_writer"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"io"
"os"
"sync"
"time"
)
type TempFileDirtyPages struct {
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f *File
writeWaitGroup sync.WaitGroup
pageAddLock sync.Mutex
chunkAddLock sync.Mutex
lastErr error
collection string
replication string
chunkedFile *page_writer.ChunkedFileWriter
}
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func newTempFileDirtyPages(file *File, chunkSize int64) *TempFileDirtyPages {
tempFile := &TempFileDirtyPages{
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f: file,
chunkedFile: page_writer.NewChunkedFileWriter(file.wfs.option.getTempFilePageDir(), chunkSize),
}
return tempFile
}
func (pages *TempFileDirtyPages) AddPage(offset int64, data []byte) {
pages.pageAddLock.Lock()
defer pages.pageAddLock.Unlock()
glog.V(4).Infof("%v tempfile AddPage [%d, %d)", pages.f.fullpath(), offset, offset+int64(len(data)))
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if _, err := pages.chunkedFile.WriteAt(data, offset); err != nil {
pages.lastErr = err
}
return
}
func (pages *TempFileDirtyPages) FlushData() error {
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pages.saveChunkedFileToStorage()
pages.writeWaitGroup.Wait()
if pages.lastErr != nil {
return fmt.Errorf("flush data: %v", pages.lastErr)
}
pages.chunkedFile.Reset()
return nil
}
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func (pages *TempFileDirtyPages) ReadDirtyDataAt(data []byte, startOffset int64) (maxStop int64) {
return pages.chunkedFile.ReadDataAt(data, startOffset)
}
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func (pages *TempFileDirtyPages) GetStorageOptions() (collection, replication string) {
return pages.collection, pages.replication
}
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func (pages *TempFileDirtyPages) saveChunkedFileToStorage() {
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pages.chunkedFile.ProcessEachInterval(func(file *os.File, logicChunkIndex page_writer.LogicChunkIndex, interval *page_writer.ChunkWrittenInterval) {
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reader := page_writer.NewFileIntervalReader(pages.chunkedFile, logicChunkIndex, interval)
pages.saveChunkedFileIntevalToStorage(reader, int64(logicChunkIndex)*pages.chunkedFile.ChunkSize+interval.StartOffset, interval.Size())
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})
}
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func (pages *TempFileDirtyPages) saveChunkedFileIntevalToStorage(reader io.Reader, offset int64, size int64) {
mtime := time.Now().UnixNano()
pages.writeWaitGroup.Add(1)
writer := func() {
defer pages.writeWaitGroup.Done()
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chunk, collection, replication, err := pages.f.wfs.saveDataAsChunk(pages.f.fullpath())(reader, pages.f.Name, offset)
if err != nil {
glog.V(0).Infof("%s saveToStorage [%d,%d): %v", pages.f.fullpath(), offset, offset+size, err)
pages.lastErr = err
return
}
chunk.Mtime = mtime
pages.collection, pages.replication = collection, replication
pages.chunkAddLock.Lock()
defer pages.chunkAddLock.Unlock()
pages.f.addChunks([]*filer_pb.FileChunk{chunk})
glog.V(3).Infof("%s saveToStorage %s [%d,%d)", pages.f.fullpath(), chunk.FileId, offset, offset+size)
}
if pages.f.wfs.concurrentWriters != nil {
pages.f.wfs.concurrentWriters.Execute(writer)
} else {
go writer()
}
}
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func (pages TempFileDirtyPages) Destroy() {
pages.chunkedFile.Reset()
}