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128 lines
3.2 KiB
C++
128 lines
3.2 KiB
C++
/*
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* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TRANSACTION_H
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#define _TRANSACTION_H
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#include "DatabaseEnvFwd.h"
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#include "Define.h"
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#include "SQLOperation.h"
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#include "StringFormat.h"
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#include <functional>
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#include <mutex>
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#include <vector>
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/*! Transactions, high level class. */
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class AC_DATABASE_API TransactionBase
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{
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friend class TransactionTask;
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friend class MySQLConnection;
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template <typename T>
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friend class DatabaseWorkerPool;
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public:
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TransactionBase() = default;
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virtual ~TransactionBase() { Cleanup(); }
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void Append(std::string_view sql);
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template<typename... Args>
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void Append(std::string_view sql, Args&&... args)
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{
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Append(Acore::StringFormat(sql, std::forward<Args>(args)...));
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}
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[[nodiscard]] std::size_t GetSize() const { return m_queries.size(); }
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protected:
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void AppendPreparedStatement(PreparedStatementBase* statement);
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void Cleanup();
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std::vector<SQLElementData> m_queries;
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private:
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bool _cleanedUp{false};
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};
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template<typename T>
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class Transaction : public TransactionBase
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{
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public:
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using TransactionBase::Append;
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void Append(PreparedStatement<T>* statement)
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{
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AppendPreparedStatement(statement);
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}
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};
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/*! Low level class*/
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class AC_DATABASE_API TransactionTask : public SQLOperation
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{
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template <class T>
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friend class DatabaseWorkerPool;
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friend class DatabaseWorker;
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friend class TransactionCallback;
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public:
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TransactionTask(std::shared_ptr<TransactionBase> trans) : m_trans(std::move(trans)) { }
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~TransactionTask() override = default;
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protected:
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bool Execute() override;
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int TryExecute();
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void CleanupOnFailure();
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std::shared_ptr<TransactionBase> m_trans;
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static std::mutex _deadlockLock;
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};
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class AC_DATABASE_API TransactionWithResultTask : public TransactionTask
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{
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public:
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TransactionWithResultTask(std::shared_ptr<TransactionBase> trans) : TransactionTask(trans) { }
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TransactionFuture GetFuture() { return m_result.get_future(); }
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protected:
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bool Execute() override;
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TransactionPromise m_result;
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};
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class AC_DATABASE_API TransactionCallback
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{
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public:
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TransactionCallback(TransactionFuture&& future) : m_future(std::move(future)) { }
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TransactionCallback(TransactionCallback&&) = default;
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TransactionCallback& operator=(TransactionCallback&&) = default;
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void AfterComplete(std::function<void(bool)> callback) &
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{
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m_callback = std::move(callback);
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}
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bool InvokeIfReady();
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TransactionFuture m_future;
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std::function<void(bool)> m_callback;
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};
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#endif
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