1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef I_KV_DB_SNAP_SHOT_H
17 #define I_KV_DB_SNAP_SHOT_H
18 
19 #include "db_types.h"
20 #include "kv_store_changed_data.h"
21 
22 namespace DistributedDB {
23 class IKvDBSnapshot {
24 public:
~IKvDBSnapshot()25     virtual ~IKvDBSnapshot() {}
26 
27     // Get the value according the key in the snapshot
28     virtual int Get(const Key &key, Value &value) const = 0;
29 
30     // Get the data according the prefix key in the snapshot
31     virtual int GetEntries(const Key &keyPrefix, std::vector<Entry> &entries) const = 0;
32 };
33 } // namespace DistributedDB
34 
35 #endif // I_KV_DB_SNAP_SHOT_H
36