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