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_VIRTUAL_DEVICE_H 17 #define KV_VIRTUAL_DEVICE_H 18 19 #include "generic_virtual_device.h" 20 21 #include "virtual_single_ver_sync_db_Interface.h" 22 namespace DistributedDB { 23 class KvVirtualDevice final : public GenericVirtualDevice { 24 public: 25 explicit KvVirtualDevice(const std::string &deviceId); 26 ~KvVirtualDevice() override; 27 28 int GetData(const Key &key, VirtualDataItem &item); 29 int GetData(const Key &key, Value &value); 30 int PutData(const Key &key, const Value &value, const Timestamp &time, int flag); 31 int PutData(const Key &key, const Value &value); 32 int DeleteData(const Key &key); 33 int StartTransaction(); 34 int Commit(); 35 void SetSaveDataDelayTime(uint64_t milliDelayTime); 36 void DelayGetSyncData(uint64_t milliDelayTime); 37 void SetGetDataErrCode(int whichTime, int errCode, bool isGetDataControl); 38 void ResetDataControl(); 39 40 int Subscribe(QuerySyncObject query, bool wait, int id); 41 int UnSubscribe(QuerySyncObject query, bool wait, int id); 42 int UnSubscribe(const QuerySyncObject &query, bool wait, int id, const SyncOperation::UserCallback &callback); 43 44 void SetSaveDataCallback(const std::function<void()> &callback); 45 void EraseWaterMark(const std::string &dev); 46 47 void SetPushNotifier(const std::function<void(const std::string &)> &pushNotifier); 48 }; 49 } // namespace DistributedDB 50 51 #endif // KV_VIRTUAL_DEVICE_H 52