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

31 lines
884 B
Go

package needle_map
import (
. "github.com/chrislusf/seaweedfs/weed/storage/types"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/google/btree"
)
type NeedleValue struct {
Key NeedleId
Offset Offset `comment:"Volume offset"` //since aligned to 8 bytes, range is 4G*8=32G
Size uint32 `comment:"Size of the data portion"`
}
func (this NeedleValue) Less(than btree.Item) bool {
that := than.(NeedleValue)
return this.Key < that.Key
}
func (nv NeedleValue) ToBytes() []byte {
return ToBytes(nv.Key, nv.Offset, nv.Size)
}
func ToBytes(key NeedleId, offset Offset, size uint32) []byte {
bytes := make([]byte, NeedleIdSize+OffsetSize+SizeSize)
NeedleIdToBytes(bytes[0:NeedleIdSize], key)
OffsetToBytes(bytes[NeedleIdSize:NeedleIdSize+OffsetSize], offset)
util.Uint32toBytes(bytes[NeedleIdSize+OffsetSize:NeedleIdSize+OffsetSize+SizeSize], size)
return bytes
}