1 /* 2 * Copyright (c) 2024 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 OHOS_DISTRIBUTED_DATA_DATAMGR_SERVICE_KVDB_WATCHER_H 17 #define OHOS_DISTRIBUTED_DATA_DATAMGR_SERVICE_KVDB_WATCHER_H 18 #include <mutex> 19 #include <shared_mutex> 20 21 #include "ikvstore_observer.h" 22 #include "kv_store_changed_data.h" 23 #include "store/general_value.h" 24 #include "store/general_watcher.h" 25 26 namespace OHOS::DistributedKv { 27 class KVDBWatcher : public DistributedData::GeneralWatcher { 28 public: 29 KVDBWatcher(); 30 int32_t OnChange(const Origin &origin, const PRIFields &primaryFields, ChangeInfo &&values) override; 31 int32_t OnChange(const Origin &origin, const GeneralWatcher::Fields &fields, ChangeData &&datas) override; 32 sptr<IKvStoreObserver> GetObserver() const; 33 void SetObserver(sptr<IKvStoreObserver> observer); 34 35 private: 36 std::vector<Entry> ConvertToEntries(const std::vector<DistributedData::Values> &values); 37 std::vector<std::string> ConvertToKeys(const std::vector<PRIValue> &values); 38 mutable std::shared_mutex mutex_; 39 sptr<IKvStoreObserver> observer_; 40 }; 41 } // namespace OHOS::DistributedKv 42 #endif // OHOS_DISTRIBUTED_DATA_DATAMGR_SERVICE_KVDB_WATCHER_H 43