147 lines
4.8 KiB
C++
147 lines
4.8 KiB
C++
/* Copyright (c) 2018, 2021, Alibaba and/or its affiliates. All rights reserved.
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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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL/PolarDB-X Engine hereby grant you an
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additional permission to link the program and your derivative works with the
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separately licensed software that they have included with
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MySQL/PolarDB-X Engine.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@addtogroup Replication
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@{
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@file control_consensus_events.h
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*/
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#ifndef CONTROL_CONSENSUS_EVENT_INCLUDED
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#define CONTROL_CONSENSUS_EVENT_INCLUDED
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#include <sys/types.h>
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#include <time.h>
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#include <list>
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#include <map>
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#include <vector>
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#include "binlog_event.h"
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#include "template_utils.h"
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#include "uuid.h"
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namespace binary_log {
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class Consensus_event : public Binary_log_event {
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public:
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Consensus_event(const char *buf, unsigned int event_len,
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const Format_description_event *desciption_event);
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/**
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Constructor.
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*/
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explicit Consensus_event(unsigned int flag_arg,
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unsigned long long int term_arg,
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unsigned long long int index_arg,
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unsigned long long int length_arg)
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: Binary_log_event(CONSENSUS_LOG_EVENT),
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flag(flag_arg),
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term(term_arg),
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index(index_arg),
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length(length_arg),
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reserve(0) {}
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protected:
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static const int ENCODED_FLAG_LENGTH = 4;
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static const int ENCODED_TERM_LENGTH = 8;
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static const int ENCODED_INDEX_LENGTH = 8;
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static const int ENCODED_LENGTH_LENGTH = 8;
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static const int ENCODED_RESERVE_LENGTH = 8;
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unsigned int flag; /** preserved */
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unsigned long long int term; /** term when entry was received by leader */
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unsigned long long int index; /** position if entry in the log */
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unsigned long long int length; /** log length */
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/* currently, reserve is used for checksum */
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unsigned long long int reserve; /** reserved */
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public:
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static const int POST_HEADER_LENGTH = ENCODED_FLAG_LENGTH
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+ ENCODED_TERM_LENGTH
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+ ENCODED_INDEX_LENGTH
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+ ENCODED_LENGTH_LENGTH
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+ ENCODED_RESERVE_LENGTH;
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static const int CONSENSUS_INDEX_OFFSET = LOG_EVENT_HEADER_LEN
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+ ENCODED_FLAG_LENGTH + ENCODED_TERM_LENGTH;
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static const int MAX_EVENT_LENGTH =
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LOG_EVENT_HEADER_LEN + POST_HEADER_LENGTH;
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};
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class Previous_consensus_index_event : public Binary_log_event {
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public:
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Previous_consensus_index_event(
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const char *buf, unsigned int event_len,
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const Format_description_event *desciption_event);
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/**
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Constructor.
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*/
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explicit Previous_consensus_index_event(unsigned long long int index_arg)
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: Binary_log_event(PREVIOUS_CONSENSUS_INDEX_LOG_EVENT),
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index(index_arg) {}
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protected:
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static const int ENCODED_INDEX_LENGTH = 8;
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unsigned long long int
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index; /** max consensus log index in the previous binlog file */
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public:
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static const int POST_HEADER_LENGTH = ENCODED_INDEX_LENGTH;
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};
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class Consensus_cluster_info_event : public Binary_log_event {
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public:
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Consensus_cluster_info_event(
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const char *buf, unsigned int event_len,
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const Format_description_event *desciption_event);
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/**
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Constructor.
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*/
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explicit Consensus_cluster_info_event(unsigned int info_length_arg,
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char *info_arg)
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: Binary_log_event(CONSENSUS_CLUSTER_INFO_EVENT),
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info_length(info_length_arg),
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info(info_arg) {}
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protected:
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static const int ENCODED_INFO_LENGTH_LENGTH = 4;
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unsigned int info_length; /** info length */
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const char *info; /** info content */
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public:
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static const int POST_HEADER_LENGTH = ENCODED_INFO_LENGTH_LENGTH;
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};
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class Consensus_empty_event : public Binary_log_event {
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public:
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Consensus_empty_event(const char *buf, unsigned int event_len,
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const Format_description_event *desciption_event);
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/**
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Constructor.
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*/
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explicit Consensus_empty_event() : Binary_log_event(CONSENSUS_EMPTY_EVENT) {}
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};
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} // namespace binary_log
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#endif
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