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https://github.com/mod-playerbots/azerothcore-wotlk.git
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112 lines
2.7 KiB
C++
112 lines
2.7 KiB
C++
/*
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* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
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* Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
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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() : _cleanedUp(false) { }
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virtual ~TransactionBase() { Cleanup(); }
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void Append(char const* sql);
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template<typename Format, typename... Args>
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void PAppend(Format&& sql, Args&&... args)
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{
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Append(Acore::StringFormat(std::forward<Format>(sql), std::forward<Args>(args)...).c_str());
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}
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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;
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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> 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(trans) { }
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~TransactionTask() { }
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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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