1 /* 2 * Copyright (c) 2022 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 NATIVE_RDB_SQLITE_CONNECTION_POOL_H 17 #define NATIVE_RDB_SQLITE_CONNECTION_POOL_H 18 19 #include <atomic> 20 #include <condition_variable> 21 #include <iostream> 22 #include <iterator> 23 #include <list> 24 #include <memory> 25 #include <mutex> 26 #include <sstream> 27 #include <stack> 28 #include <vector> 29 30 #include "base_transaction.h" 31 #include "connection.h" 32 #include "rdb_common.h" 33 #include "rdb_store_config.h" 34 namespace OHOS { 35 namespace NativeRdb { 36 class ConnectionPool : public std::enable_shared_from_this<ConnectionPool> { 37 public: 38 using SharedConn = std::shared_ptr<Connection>; 39 using SharedConns = std::vector<SharedConn>; 40 static constexpr std::chrono::milliseconds INVALID_TIME = std::chrono::milliseconds(0); 41 static std::shared_ptr<ConnectionPool> Create(const RdbStoreConfig &config, int &errCode); 42 ~ConnectionPool(); 43 static std::pair<RebuiltType, std::shared_ptr<ConnectionPool>> HandleDataCorruption 44 (const RdbStoreConfig &storeConfig, int &errCode); 45 std::pair<int32_t, std::shared_ptr<Connection>> CreateTransConn(bool limited = true); 46 SharedConn AcquireConnection(bool isReadOnly); 47 SharedConn Acquire(bool isReadOnly, std::chrono::milliseconds ms = INVALID_TIME); 48 // this interface is only provided for resultSet 49 SharedConn AcquireRef(bool isReadOnly, std::chrono::milliseconds ms = INVALID_TIME); 50 std::pair<SharedConn, SharedConns> AcquireAll(int32_t time); 51 std::pair<int32_t, SharedConn> DisableWal(); 52 int32_t EnableWal(); 53 int32_t Dump(bool isWriter, const char *header); 54 55 int RestartReaders(); 56 int ConfigLocale(const std::string &localeStr); 57 int ChangeDbFileForRestore(const std::string &newPath, const std::string &backupPath, 58 const std::vector<uint8_t> &newKey, SlaveStatus &slaveStatus); 59 std::stack<BaseTransaction> &GetTransactionStack(); 60 std::mutex &GetTransactionStackMutex(); 61 int AcquireTransaction(); 62 void ReleaseTransaction(); 63 void CloseAllConnections(); 64 bool IsInTransaction(); 65 void SetInTransaction(bool isInTransaction); 66 67 private: 68 struct ConnNode { 69 static constexpr uint32_t CHECK_POINT_INTERVAL = 5; // 5 min 70 bool using_ = false; 71 int32_t tid_ = 0; 72 int32_t id_ = 0; 73 std::chrono::steady_clock::time_point time_ = std::chrono::steady_clock::now(); 74 std::chrono::steady_clock::time_point failedTime_; 75 std::shared_ptr<Connection> connect_; 76 77 explicit ConnNode(std::shared_ptr<Connection> conn); 78 std::shared_ptr<Connection> GetConnect(); 79 int64_t GetUsingTime() const; 80 bool IsWriter() const; 81 int32_t Unused(int32_t count); 82 }; 83 84 struct Container { 85 using Creator = std::function<std::pair<int32_t, std::shared_ptr<Connection>>()>; 86 static constexpr int32_t MAX_RIGHT = 0x4FFFFFFF; 87 static constexpr int32_t MIN_TRANS_ID = 10000; 88 bool disable_ = true; 89 int max_ = 0; 90 int total_ = 0; 91 int count_ = 0; 92 int trans_ = 0; 93 int32_t left_ = 0; 94 int32_t right_ = 0; 95 std::chrono::seconds timeout_; 96 std::list<std::shared_ptr<ConnNode>> nodes_; 97 std::list<std::weak_ptr<ConnNode>> details_; 98 std::mutex mutex_; 99 std::condition_variable cond_; 100 Creator creator_ = nullptr; 101 std::pair<int32_t, std::shared_ptr<ConnNode>> Initialize(Creator creator, int32_t max, int32_t timeout, 102 bool disable, bool acquire = false); 103 int32_t ConfigLocale(const std::string &locale); 104 std::shared_ptr<ConnNode> Acquire(std::chrono::milliseconds milliS); 105 std::list<std::shared_ptr<ConnNode>> AcquireAll(std::chrono::milliseconds milliS); 106 std::pair<int32_t, std::shared_ptr<ConnNode>> Create(); 107 108 void Disable(); 109 void Enable(); 110 int32_t Release(std::shared_ptr<ConnNode> node); 111 int32_t Drop(std::shared_ptr<ConnNode> node); 112 int32_t Clear(); 113 bool IsFull(); 114 int32_t Dump(const char *header, int32_t count); 115 116 private: 117 int32_t ExtendNode(); 118 int32_t RelDetails(std::shared_ptr<ConnNode> node); 119 }; 120 121 explicit ConnectionPool(const RdbStoreConfig &storeConfig); 122 std::pair<int32_t, std::shared_ptr<Connection>> Init(bool isAttach = false, bool needWriter = false); 123 int32_t GetMaxReaders(const RdbStoreConfig &config); 124 std::shared_ptr<Connection> Convert2AutoConn(std::shared_ptr<ConnNode> node, bool isTrans = false); 125 void ReleaseNode(std::shared_ptr<ConnNode> node, bool reuse = true); 126 int RestoreByDbSqliteType(const std::string &newPath, const std::string &backupPath, SlaveStatus &slaveStatus); 127 int RestoreMasterDb(const std::string &newPath, const std::string &backupPath); 128 bool CheckIntegrity(const std::string &dbPath); 129 130 static constexpr int LIMITATION = 1024; 131 static constexpr uint32_t ITER_V1 = 5000; 132 static constexpr uint32_t ITERS_COUNT = 2; 133 static constexpr uint32_t MAX_TRANS = 4; 134 const RdbStoreConfig &config_; 135 RdbStoreConfig attachConfig_; 136 Container writers_; 137 Container readers_; 138 int32_t maxReader_ = 0; 139 140 std::stack<BaseTransaction> transactionStack_; 141 std::mutex transactionStackMutex_; 142 std::condition_variable transCondition_; 143 std::mutex transMutex_; 144 bool transactionUsed_; 145 std::atomic<bool> isInTransaction_ = false; 146 std::atomic<uint32_t> transCount_ = 0; 147 }; 148 149 } // namespace NativeRdb 150 } // namespace OHOS 151 #endif 152