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driver.go
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driver.go
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// Copyright 2016 DeepFabric, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package storage
import "github.com/201341/elasticell/pkg/pb/raftcmdpb"
// WriteBatch batch operation
type WriteBatch interface {
Delete(key []byte) error
Set(key []byte, value []byte) error
}
// Driver is def storage interface
type Driver interface {
GetEngine() Engine
GetDataEngine() DataEngine
GetKVEngine() KVEngine
GetHashEngine() HashEngine
GetSetEngine() SetEngine
GetZSetEngine() ZSetEngine
GetListEngine() ListEngine
NewWriteBatch() WriteBatch
Write(wb WriteBatch, sync bool) error
}
// KVEngine is the storage of KV
type KVEngine interface {
RangeDeleteable
Set(key, value []byte) error
MSet(keys [][]byte, values [][]byte) error
Get(key []byte) ([]byte, error)
IncrBy(key []byte, incrment int64) (int64, error)
DecrBy(key []byte, incrment int64) (int64, error)
GetSet(key, value []byte) ([]byte, error)
Append(key, value []byte) (int64, error)
SetNX(key, value []byte) (int64, error)
StrLen(key []byte) (int64, error)
NewWriteBatch() WriteBatch
Write(wb WriteBatch) error
}
// HashEngine is the storage of Hash
type HashEngine interface {
HSet(key, field, value []byte) (int64, error)
HGet(key, field []byte) ([]byte, error)
HDel(key []byte, fields ...[]byte) (int64, error)
HExists(key, field []byte) (bool, error)
HKeys(key []byte) ([][]byte, error)
HVals(key []byte) ([][]byte, error)
HGetAll(key []byte) ([]*raftcmdpb.FVPair, error)
HScanGet(key, start []byte, count int) ([]*raftcmdpb.FVPair, error)
HLen(key []byte) (int64, error)
HMGet(key []byte, fields ...[]byte) ([][]byte, []error)
HMSet(key []byte, fields, values [][]byte) error
HSetNX(key, field, value []byte) (int64, error)
HStrLen(key, field []byte) (int64, error)
HIncrBy(key, field []byte, incrment int64) ([]byte, error)
}
// SetEngine is the storage of Set
type SetEngine interface {
SAdd(key []byte, members ...[]byte) (int64, error)
SRem(key []byte, members ...[]byte) (int64, error)
SCard(key []byte) (int64, error)
SMembers(key []byte) ([][]byte, error)
SIsMember(key []byte, member []byte) (int64, error)
SPop(key []byte) ([]byte, error)
}
// ZSetEngine is the storage of ZSet
type ZSetEngine interface {
ZAdd(key []byte, score float64, member []byte) (int64, error)
ZCard(key []byte) (int64, error)
ZCount(key []byte, min []byte, max []byte) (int64, error)
ZIncrBy(key []byte, member []byte, by float64) ([]byte, error)
ZLexCount(key []byte, min []byte, max []byte) (int64, error)
ZRange(key []byte, start int64, stop int64) ([]*raftcmdpb.ScorePair, error)
ZRangeByLex(key []byte, min []byte, max []byte) ([][]byte, error)
ZRangeByScore(key []byte, min []byte, max []byte) ([]*raftcmdpb.ScorePair, error)
ZRank(key []byte, member []byte) (int64, error)
ZRem(key []byte, members ...[]byte) (int64, error)
ZRemRangeByLex(key []byte, min []byte, max []byte) (int64, error)
ZRemRangeByRank(key []byte, start int64, stop int64) (int64, error)
ZRemRangeByScore(key []byte, min []byte, max []byte) (int64, error)
ZScore(key []byte, member []byte) ([]byte, error)
}
// ListEngine is the storage of List
type ListEngine interface {
LIndex(key []byte, index int64) ([]byte, error)
LInsert(key []byte, pos int, pivot []byte, value []byte) (int64, error)
LLen(key []byte) (int64, error)
LPop(key []byte) ([]byte, error)
LPush(key []byte, values ...[]byte) (int64, error)
LPushX(key []byte, value []byte) (int64, error)
LRange(key []byte, begin int64, end int64) ([][]byte, error)
LRem(key []byte, count int64, value []byte) (int64, error)
LSet(key []byte, index int64, value []byte) error
LTrim(key []byte, begin int64, end int64) error
RPop(key []byte) ([]byte, error)
RPush(key []byte, values ...[]byte) (int64, error)
RPushX(key []byte, value []byte) (int64, error)
}
// Seekable support seek
type Seekable interface {
Seek(key []byte) ([]byte, []byte, error)
}
// Scanable support scan
type Scanable interface {
// Scan scans the range and execute the handler fun.
// returns false means end the scan.
Scan(start, end []byte, handler func(key, value []byte) (bool, error), pooledKey bool) error
// Free free the pooled bytes
Free(pooled []byte)
}
// RangeDeleteable support range delete
type RangeDeleteable interface {
RangeDelete(start, end []byte) error
}
// DataEngine is the storage of redis data
type DataEngine interface {
RangeDeleteable
// GetTargetSizeKey Find a key in the range [startKey, endKey) that sum size over target
// if found returns the key
GetTargetSizeKey(startKey []byte, endKey []byte, size uint64) (uint64, []byte, error)
// CreateSnapshot create a snapshot file under the giving path
CreateSnapshot(path string, start, end []byte) error
// ApplySnapshot apply a snapshort file from giving path
ApplySnapshot(path string) error
// ScanIndexInfo scans the range and execute the handler fun. Returens a tuple (error count, first error)
ScanIndexInfo(startKey []byte, endKey []byte, skipEmpty bool, handler func(key, idxInfo []byte) error) (int, error)
SetIndexInfo(key, idxInfo []byte) error
GetIndexInfo(key []byte) (idxInfo []byte, err error)
}
// Engine is the storage of meta data
type Engine interface {
Scanable
Seekable
RangeDeleteable
Set(key []byte, value []byte) error
Get(key []byte) ([]byte, error)
Delete(key []byte) error
}