110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#pragma once
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#include <maxscale/ccdefs.hh>
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#include <memory>
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#include <list>
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#include <string>
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#include <maxscale/buffer.hh>
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namespace maxscale
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{
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class SessionCommand;
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typedef std::shared_ptr<SessionCommand> SSessionCommand;
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typedef std::list<SSessionCommand> SessionCommandList;
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class SessionCommand
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{
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SessionCommand(const SessionCommand&);
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SessionCommand& operator=(const SessionCommand&);
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public:
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/**
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* @brief Get the command type of the session command
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*
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* @return The type of the command
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*/
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uint8_t get_command() const;
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/**
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* @brief Get the position of this session command
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*
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* @return The position of the session command
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*/
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uint64_t get_position() const;
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/**
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* @brief Creates a deep copy of the internal buffer
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*
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* @return A deep copy of the internal buffer or NULL on error
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*/
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GWBUF* deep_copy_buffer();
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/**
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* @brief Create a new session command
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*
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* @param buffer The buffer containing the command. Note that the ownership
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* of @c buffer is transferred to this object.
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* @param id A unique position identifier used to track replies
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*/
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SessionCommand(GWBUF* buffer, uint64_t id);
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~SessionCommand();
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/**
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* @brief Debug function for printing session commands
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*
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* @return String representation of the object
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*/
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std::string to_string();
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/**
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* @brief Equality comparison
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*
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* @return True if @c rhs is equal
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*/
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bool eq(const SessionCommand& rhs) const;
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/**
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* Mark the session command as a re-execution of another command
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*
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* This function makes the current command's buffer a reference to the other
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* command's buffer. The commands will still have separate positions and
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* reply statuses.
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*
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* @param rhs Session command whose data is used
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*/
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void mark_as_duplicate(const SessionCommand& rhs);
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private:
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mxs::Buffer m_buffer; /**< The buffer containing the command */
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uint8_t m_command; /**< The command being executed */
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uint64_t m_pos; /**< Unique position identifier */
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bool m_reply_sent; /**< Whether the session command reply has been sent */
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};
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inline bool operator==(const SessionCommand& lhs, const SessionCommand& rhs)
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{
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return lhs.eq(rhs);
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}
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inline bool operator!=(const SessionCommand& lhs, const SessionCommand& rhs)
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{
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return !lhs.eq(rhs);
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}
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}
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