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 KV_STORE_OBSERVER_H
17 #define KV_STORE_OBSERVER_H
18 
19 #include "kv_store_changed_data.h"
20 #include "store_observer.h"
21 
22 namespace DistributedDB {
23 class KvStoreObserver : public StoreObserver {
24 public:
~KvStoreObserver()25     ~KvStoreObserver() override {}
26 
27     // Data change callback
28     virtual void OnChange(const KvStoreChangedData &data) = 0;
29 
OnChange(const StoreChangedData & data)30     void OnChange(const StoreChangedData &data) override
31     {
32     }
33 
OnChange(Origin origin,const std::string & originalId,ChangedData && data)34     void OnChange(Origin origin, const std::string &originalId, ChangedData &&data) override
35     {
36     }
37 
OnChange(StoreChangedInfo && data)38     void OnChange(StoreChangedInfo &&data) override
39     {
40     }
41 };
42 } // namespace DistributedDB
43 
44 #endif // KV_STORE_OBSERVER_H