1 /* 2 * Copyright (c) 2023 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 CLOUD_SYNC_STRATEGY_H 17 #define CLOUD_SYNC_STRATEGY_H 18 19 #include "data_transformer.h" 20 #include "db_errno.h" 21 #include "db_types.h" 22 #include "icloud_sync_storage_interface.h" 23 24 namespace DistributedDB { 25 class CloudSyncStrategy { 26 public: 27 CloudSyncStrategy(); 28 virtual ~CloudSyncStrategy() = default; 29 30 void SetConflictResolvePolicy(SingleVerConflictResolvePolicy policy); 31 32 virtual OpType TagSyncDataStatus(bool existInLocal, bool isCloudWin, const LogInfo &localInfo, 33 const LogInfo &cloudInfo); 34 35 virtual bool JudgeUpdateCursor(); 36 37 virtual bool JudgeUpload(); 38 39 static bool IsDelete(const LogInfo &info); 40 41 static bool IsLogNeedUpdate(const LogInfo &cloudInfo, const LogInfo &localInfo); 42 43 OpType TagUpdateLocal(const LogInfo &cloudInfo, const LogInfo &localInfo) const; 44 protected: 45 static bool IsSameVersion(const LogInfo &cloudInfo, const LogInfo &localInfo); 46 47 bool IsIgnoreUpdate(const LogInfo &localInfo) const; 48 49 bool IsSameRecord(const LogInfo &cloudInfo, const LogInfo &localInfo); 50 51 SingleVerConflictResolvePolicy policy_; 52 }; 53 } 54 #endif // CLOUD_SYNC_STRATEGY_H 55