MariaDBConnection.h

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/*
 * SNode.C - A Slim Toolkit for Network Communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *               2021, 2022 Daniel Flockert
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 * This program is free software: you can redistribute it and/or modify
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 * by the Free Software Foundation, either version 3 of the License, or
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 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
/*
 * MIT License
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#ifndef DATABASE_MARIADB_MARIADBCONNECTION
#define DATABASE_MARIADB_MARIADBCONNECTION
 
#include "core/eventreceiver/ExceptionalConditionEventReceiver.h"
#include "core/eventreceiver/ReadEventReceiver.h"
#include "core/eventreceiver/WriteEventReceiver.h"
#include "database/mariadb/MariaDBCommandSequence.h" // IWYU pragma: export
 
namespace database::mariadb {
    class MariaDBCommand;
    class MariaDBClient;
    class MariaDBConnection;
    struct MariaDBConnectionDetails;
    struct MariaDBState;
} // namespace database::mariadb
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
namespace utils {
    class Timeval;
}
 
#include <deque>
#include <functional>
#include <mysql.h>
#include <string>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace database::mariadb {
 
    class MariaDBCommandStartEvent : private core::EventReceiver {
    public:
        MariaDBCommandStartEvent(const std::string& name, MariaDBConnection* mariaDBConnection);
 
        using core::EventReceiver::span;
 
    private:
        void onEvent(const utils::Timeval& currentTime) override;
 
        void destruct() override;
 
        MariaDBConnection* mariaDBConnection = nullptr;
    };
 
    class MariaDBConnection
        : private core::eventreceiver::ReadEventReceiver
        , private core::eventreceiver::WriteEventReceiver
        , private core::eventreceiver::ExceptionalConditionEventReceiver {
    public:
        explicit MariaDBConnection(MariaDBClient* mariaDBClient,
                                   const MariaDBConnectionDetails& connectionDetails,
                                   const std::function<void(const MariaDBState&)>& onStateChanged);
        MariaDBConnection(const MariaDBConnection&) = delete;
 
        ~MariaDBConnection() override;
 
        MariaDBConnection& operator=(const MariaDBConnection&) = delete;
 
        MariaDBCommandSequence& execute_async(MariaDBCommandSequence&& commandSequence);
        void execute_sync(MariaDBCommand* mariaDBCommand);
 
        void commandStart(const utils::Timeval& currentTime);
        void commandContinue(int status);
        void commandCompleted();
 
        void unmanaged();
 
    protected:
        void checkStatus(int status);
 
        void readEvent() override;
        void writeEvent() override;
        void outOfBandEvent() override;
 
        void readTimeout() override;
        void writeTimeout() override;
        void outOfBandTimeout() override;
 
        void unobservedEvent() override;
 
    private:
        MariaDBClient* mariaDBClient;
        MYSQL* mysql;
        const std::string connectionName;
 
        std::deque<MariaDBCommandSequence> commandSequenceQueue;
 
        MariaDBCommand* currentCommand = nullptr;
        bool connected = false;
 
        MariaDBCommandStartEvent commandStartEvent;
 
        std::function<void(const MariaDBState&)> onStateChanged;
    };
 
} // namespace database::mariadb
 
#endif // DATABASE_MARIADB_MARIADBCONNECTION