mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-05-15 16:00:53 +02:00
e6a49dc533
* Fix division by zero * Fix file handle leak * Fix file handle leak * Fix file handle leak * Fix goroutine leak
114 lines
3 KiB
Go
114 lines
3 KiB
Go
package storage
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import (
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"os"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/storage/erasure_coding"
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"github.com/seaweedfs/seaweedfs/weed/storage/needle_map"
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. "github.com/seaweedfs/seaweedfs/weed/storage/types"
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)
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type SortedFileNeedleMap struct {
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baseNeedleMapper
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baseFileName string
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dbFile *os.File
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dbFileSize int64
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}
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func NewSortedFileNeedleMap(indexBaseFileName string, indexFile *os.File) (m *SortedFileNeedleMap, err error) {
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m = &SortedFileNeedleMap{baseFileName: indexBaseFileName}
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m.indexFile = indexFile
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fileName := indexBaseFileName + ".sdx"
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if !isSortedFileFresh(fileName, indexFile) {
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glog.V(0).Infof("Start to Generate %s from %s", fileName, indexFile.Name())
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erasure_coding.WriteSortedFileFromIdx(indexBaseFileName, ".sdx")
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glog.V(0).Infof("Finished Generating %s from %s", fileName, indexFile.Name())
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}
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glog.V(1).Infof("Opening %s...", fileName)
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if m.dbFile, err = os.Open(indexBaseFileName + ".sdx"); err != nil {
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return
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}
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dbStat, _ := m.dbFile.Stat()
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m.dbFileSize = dbStat.Size()
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glog.V(1).Infof("Loading %s...", indexFile.Name())
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mm, indexLoadError := newNeedleMapMetricFromIndexFile(indexFile)
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if indexLoadError != nil {
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_ = m.dbFile.Close()
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return nil, indexLoadError
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}
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m.mapMetric = *mm
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return
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}
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func isSortedFileFresh(dbFileName string, indexFile *os.File) bool {
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// normally we always write to index file first
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dbFile, err := os.Open(dbFileName)
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if err != nil {
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return false
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}
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defer dbFile.Close()
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dbStat, dbStatErr := dbFile.Stat()
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indexStat, indexStatErr := indexFile.Stat()
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if dbStatErr != nil || indexStatErr != nil {
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glog.V(0).Infof("Can not stat file: %v and %v", dbStatErr, indexStatErr)
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return false
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}
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return dbStat.ModTime().After(indexStat.ModTime())
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}
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func (m *SortedFileNeedleMap) Get(key NeedleId) (element *needle_map.NeedleValue, ok bool) {
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offset, size, err := erasure_coding.SearchNeedleFromSortedIndex(m.dbFile, m.dbFileSize, key, nil)
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ok = err == nil
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return &needle_map.NeedleValue{Key: key, Offset: offset, Size: size}, ok
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}
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func (m *SortedFileNeedleMap) Put(key NeedleId, offset Offset, size Size) error {
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return os.ErrInvalid
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}
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func (m *SortedFileNeedleMap) Delete(key NeedleId, offset Offset) error {
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_, size, err := erasure_coding.SearchNeedleFromSortedIndex(m.dbFile, m.dbFileSize, key, nil)
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if err != nil {
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if err == erasure_coding.NotFoundError {
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return nil
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}
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return err
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}
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if size.IsDeleted() {
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return nil
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}
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// write to index file first
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if err := m.appendToIndexFile(key, offset, TombstoneFileSize); err != nil {
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return err
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}
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_, _, err = erasure_coding.SearchNeedleFromSortedIndex(m.dbFile, m.dbFileSize, key, erasure_coding.MarkNeedleDeleted)
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return err
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}
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func (m *SortedFileNeedleMap) Close() {
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if m == nil {
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return
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}
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if m.indexFile != nil {
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m.indexFile.Close()
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}
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if m.dbFile != nil {
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m.dbFile.Close()
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}
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}
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func (m *SortedFileNeedleMap) Destroy() error {
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m.Close()
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os.Remove(m.indexFile.Name())
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return os.Remove(m.baseFileName + ".sdx")
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}
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