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 #ifndef SYNCER_H
16 #define SYNCER_H
17 
18 #include "generic_syncer.h"
19 
20 namespace DistributedDB {
21 class SingleVerSyncer : public GenericSyncer {
22 public:
23     void RemoteDataChanged(const std::string &device) override;
24 
25     void RemoteDeviceOffline(const std::string &device) override;
26 
27     // Set stale data wipe policy
28     int SetStaleDataWipePolicy(WipePolicy policy) override;
29 
30     // delete specified device's watermark
31     int EraseDeviceWaterMark(const std::string &deviceId, bool isNeedHash) override;
32 
33     // delete specified device's and table's watermark
34     int EraseDeviceWaterMark(const std::string &deviceId, bool isNeedHash,
35         const std::string &tableName) override;
36 
37     int GetHashDeviceId(const std::string &clientId, std::string &hashDevId) const override;
38 protected:
39     // Create a sync engine, if has memory error, will return nullptr.
40     ISyncEngine *CreateSyncEngine() override;
41 };
42 }
43 #endif // SYNCER_H
44