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81 lines
2.3 KiB
81 lines
2.3 KiB
package storage
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import (
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"os"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/storage/idx"
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"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
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. "github.com/chrislusf/seaweedfs/weed/storage/types"
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)
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type NeedleMap struct {
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baseNeedleMapper
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m needle_map.NeedleValueMap
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}
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func NewCompactNeedleMap(file *os.File) *NeedleMap {
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nm := &NeedleMap{
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m: needle_map.NewCompactMap(),
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}
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nm.indexFile = file
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stat, err := file.Stat()
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if err != nil {
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glog.Fatalf("stat file %s: %v", file.Name(), err)
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}
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nm.indexFileOffset = stat.Size()
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return nm
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}
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func LoadCompactNeedleMap(file *os.File) (*NeedleMap, error) {
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nm := NewCompactNeedleMap(file)
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return doLoading(file, nm)
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}
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func doLoading(file *os.File, nm *NeedleMap) (*NeedleMap, error) {
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e := idx.WalkIndexFile(file, 0, func(key NeedleId, offset Offset, size Size) error {
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nm.MaybeSetMaxFileKey(key)
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if !offset.IsZero() && size.IsValid() {
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nm.FileCounter++
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nm.FileByteCounter = nm.FileByteCounter + uint64(size)
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oldOffset, oldSize := nm.m.Set(NeedleId(key), offset, size)
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if !oldOffset.IsZero() && oldSize.IsValid() {
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nm.DeletionCounter++
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nm.DeletionByteCounter = nm.DeletionByteCounter + uint64(oldSize)
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}
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} else {
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oldSize := nm.m.Delete(NeedleId(key))
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nm.DeletionCounter++
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nm.DeletionByteCounter = nm.DeletionByteCounter + uint64(oldSize)
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}
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return nil
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})
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glog.V(1).Infof("max file key: %d for file: %s", nm.MaxFileKey(), file.Name())
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return nm, e
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}
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func (nm *NeedleMap) Put(key NeedleId, offset Offset, size Size) error {
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_, oldSize := nm.m.Set(NeedleId(key), offset, size)
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nm.logPut(key, oldSize, size)
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return nm.appendToIndexFile(key, offset, size)
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}
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func (nm *NeedleMap) Get(key NeedleId) (element *needle_map.NeedleValue, ok bool) {
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element, ok = nm.m.Get(NeedleId(key))
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return
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}
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func (nm *NeedleMap) Delete(key NeedleId, offset Offset) error {
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deletedBytes := nm.m.Delete(NeedleId(key))
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nm.logDelete(deletedBytes)
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return nm.appendToIndexFile(key, offset, TombstoneFileSize)
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}
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func (nm *NeedleMap) Close() {
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indexFileName := nm.indexFile.Name()
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if err := nm.indexFile.Sync(); err != nil {
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glog.Warningf("sync file %s failed, %v", indexFileName, err)
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}
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_ = nm.indexFile.Close()
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}
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func (nm *NeedleMap) Destroy() error {
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nm.Close()
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return os.Remove(nm.indexFile.Name())
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}
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