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 #ifndef RELATIONAL_STORE_CONNECTION_H 16 #define RELATIONAL_STORE_CONNECTION_H 17 #ifdef RELATIONAL_STORE 18 19 #include <atomic> 20 #include <string> 21 22 #include "db_types.h" 23 #include "iconnection.h" 24 #include "macro_utils.h" 25 #include "ref_object.h" 26 #include "relational_store_delegate.h" 27 28 namespace DistributedDB { 29 class IRelationalStore; 30 using RelationalObserverAction = std::function<void(const std::string &device)>; 31 class RelationalStoreConnection : public IConnection, public virtual RefObject { 32 public: 33 struct SyncInfo { 34 const std::vector<std::string> &devices; 35 SyncMode mode = SYNC_MODE_PUSH_PULL; 36 const SyncStatusCallback &onComplete; 37 const Query &query; 38 bool wait = true; 39 }; 40 41 RelationalStoreConnection(); 42 43 explicit RelationalStoreConnection(IRelationalStore *store); 44 45 virtual ~RelationalStoreConnection() = default; 46 47 DISABLE_COPY_ASSIGN_MOVE(RelationalStoreConnection); 48 49 // Close and release the connection. 50 virtual int Close() = 0; 51 virtual int TriggerAutoSync() = 0; 52 virtual int SyncToDevice(SyncInfo &info) = 0; 53 virtual std::string GetIdentifier() = 0; 54 virtual int CreateDistributedTable(const std::string &tableName) = 0; 55 virtual int RegisterLifeCycleCallback(const DatabaseLifeCycleNotifier ¬ifier) = 0; 56 57 virtual int RemoveDeviceData(const std::string &device) = 0; 58 virtual int RemoveDeviceData(const std::string &device, const std::string &tableName) = 0; 59 virtual void RegisterObserverAction(const RelationalObserverAction &action) = 0; 60 virtual int RemoteQuery(const std::string &device, const RemoteCondition &condition, uint64_t timeout, 61 std::shared_ptr<ResultSet> &result) = 0; 62 virtual int RemoveDeviceData() = 0; 63 protected: 64 // Get the stashed 'RelationalDB_ pointer' without ref. 65 template<typename DerivedDBType> GetDB()66 DerivedDBType *GetDB() const 67 { 68 return static_cast<DerivedDBType *>(store_); 69 } 70 71 virtual int Pragma(int cmd, void *parameter); 72 IRelationalStore *store_ = nullptr; 73 std::atomic<bool> isExclusive_; 74 }; 75 } // namespace DistributedDB 76 #endif 77 #endif // RELATIONAL_STORE_CONNECTION_H