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 SINGLE_VER_SYNC_ENGINE_H
17 #define SINGLE_VER_SYNC_ENGINE_H
18 
19 #include "sync_engine.h"
20 
21 namespace DistributedDB {
22 class SingleVerSyncEngine final : public SyncEngine {
23 public:
SingleVerSyncEngine()24     SingleVerSyncEngine() : needClearRemoteStaleData_(false) {};
25 
26     // If set true, remote stale data will be clear when remote db rebuilt.
27     void EnableClearRemoteStaleData(bool enable);
28 
29     // used by SingleVerKVSyncer when db online
30     int StartAutoSubscribeTimer(const ISyncInterface &syncInterface) override;
31 
32     // used by SingleVerKVSyncer when remote/local db closed
33     void StopAutoSubscribeTimer() override;
34 
35     int SubscribeTimeOut(TimerId id);
36 
37     DISABLE_COPY_ASSIGN_MOVE(SingleVerSyncEngine);
38 protected:
~SingleVerSyncEngine()39     ~SingleVerSyncEngine() override {};
40 
41     // Create a context
42     ISyncTaskContext *CreateSyncTaskContext(const ISyncInterface &syncInterface) override;
43 
44 private:
45     DECLARE_OBJECT_TAG(SingleVerSyncEngine);
46 #ifndef RUNNING_ON_TESTCASE
47     static constexpr int SUBSCRIBE_TRIGGER_TIME_OUT = 30 * 60 * 1000; // 30min
48 #else
49     static constexpr int SUBSCRIBE_TRIGGER_TIME_OUT = 5 * 60 * 1000; // 5min for test
50 #endif
51 
52     bool needClearRemoteStaleData_;
53 
54     // for subscribe timeout callback
55     std::mutex timerLock_;
56     TimerId subscribeTimerId_ = 0;
57 };
58 } // namespace DistributedDB
59 
60 #endif // SINGLE_VER_SYNC_ENGINE_H