seaweedfs/weed/storage/needle_map_memory.go
2019-09-12 14:18:21 +01:00

88 lines
2.5 KiB
Go

package storage
import (
"os"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/storage/idx"
"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
. "github.com/chrislusf/seaweedfs/weed/storage/types"
)
type NeedleMap struct {
baseNeedleMapper
m needle_map.NeedleValueMap
}
func NewCompactNeedleMap(file *os.File) *NeedleMap {
nm := &NeedleMap{
m: needle_map.NewCompactMap(),
}
nm.indexFile = file
return nm
}
func NewBtreeNeedleMap(file *os.File) *NeedleMap {
nm := &NeedleMap{
m: needle_map.NewBtreeMap(),
}
nm.indexFile = file
return nm
}
func LoadCompactNeedleMap(file *os.File) (*NeedleMap, error) {
nm := NewCompactNeedleMap(file)
return doLoading(file, nm)
}
func LoadBtreeNeedleMap(file *os.File) (*NeedleMap, error) {
nm := NewBtreeNeedleMap(file)
return doLoading(file, nm)
}
func doLoading(file *os.File, nm *NeedleMap) (*NeedleMap, error) {
e := idx.WalkIndexFile(file, func(key NeedleId, offset Offset, size uint32) error {
nm.MaybeSetMaxFileKey(key)
if !offset.IsZero() && size != TombstoneFileSize {
nm.FileCounter++
nm.FileByteCounter = nm.FileByteCounter + uint64(size)
oldOffset, oldSize := nm.m.Set(NeedleId(key), offset, size)
// glog.V(3).Infoln("reading key", key, "offset", offset*NeedlePaddingSize, "size", size, "oldSize", oldSize)
if !oldOffset.IsZero() && oldSize != TombstoneFileSize {
nm.DeletionCounter++
nm.DeletionByteCounter = nm.DeletionByteCounter + uint64(oldSize)
}
} else {
oldSize := nm.m.Delete(NeedleId(key))
// glog.V(3).Infoln("removing key", key, "offset", offset*NeedlePaddingSize, "size", size, "oldSize", oldSize)
nm.DeletionCounter++
nm.DeletionByteCounter = nm.DeletionByteCounter + uint64(oldSize)
}
return nil
})
glog.V(1).Infof("max file key: %d for file: %s", nm.MaxFileKey(), file.Name())
return nm, e
}
func (nm *NeedleMap) Put(key NeedleId, offset Offset, size uint32) error {
_, oldSize := nm.m.Set(NeedleId(key), offset, size)
nm.logPut(key, oldSize, size)
return nm.appendToIndexFile(key, offset, size)
}
func (nm *NeedleMap) Get(key NeedleId) (element *needle_map.NeedleValue, ok bool) {
element, ok = nm.m.Get(NeedleId(key))
return
}
func (nm *NeedleMap) Delete(key NeedleId, offset Offset) error {
deletedBytes := nm.m.Delete(NeedleId(key))
nm.logDelete(deletedBytes)
return nm.appendToIndexFile(key, offset, TombstoneFileSize)
}
func (nm *NeedleMap) Close() {
_ = nm.indexFile.Close()
}
func (nm *NeedleMap) Destroy() error {
nm.Close()
return os.Remove(nm.indexFile.Name())
}