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 MULTI_VER_NATURAL_STORE_SNAPSHOT_H
17 #define MULTI_VER_NATURAL_STORE_SNAPSHOT_H
18 
19 #ifndef OMIT_MULTI_VER
20 #include "ikvdb_snapshot.h"
21 #include "storage_executor.h"
22 
23 namespace DistributedDB {
24 class MultiVerNaturalStoreSnapshot : public IKvDBSnapshot {
25 public:
26     explicit MultiVerNaturalStoreSnapshot(StorageExecutor *handle);
27     ~MultiVerNaturalStoreSnapshot() override;
28 
29     DISABLE_COPY_ASSIGN_MOVE(MultiVerNaturalStoreSnapshot);
30 
31     // Get the value according the key in the snapshot
32     int Get(const Key &key, Value &value) const override;
33 
34     // Get the data according the prefix key in the snapshot
35     int GetEntries(const Key &keyPrefix, std::vector<Entry> &entries) const override;
36 
37     void Close();
38 
39 private:
40     StorageExecutor *databaseHandle_;
41 };
42 } // namespace DistributedDB
43 
44 #endif  // MULTI_VER_NATURAL_STORE_SNAPSHOT_H
45 #endif