128 lines
5.2 KiB
C++
128 lines
5.2 KiB
C++
#pragma once
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/*
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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: 2020-01-01
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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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#include <maxscale/cppdefs.hh>
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#include <string>
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using std::string;
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enum mysql_server_version
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{
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MYSQL_SERVER_VERSION_100,
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MYSQL_SERVER_VERSION_55,
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MYSQL_SERVER_VERSION_51
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};
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class Gtid
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{
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public:
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uint32_t domain;
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int64_t server_id; // Is actually 32bit unsigned. 0 is only used by server versions <= 10.1
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uint64_t sequence;
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Gtid();
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/**
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* Parse a Gtid-triplet from a string. In case of a multi-triplet value, only the triplet with
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* the given domain is returned.
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*
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* @param str Gtid string
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* @param search_domain The Gtid domain whose triplet should be returned. Negative domain stands for
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* autoselect, which is only allowed when the string contains one triplet.
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*/
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Gtid(const char* str, int64_t search_domain = -1);
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bool operator == (const Gtid& rhs) const;
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string to_string() const;
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private:
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void parse_triplet(const char* str);
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};
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// Contains data returned by one row of SHOW ALL SLAVES STATUS
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class SlaveStatusInfo
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{
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public:
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int64_t master_server_id; /**< The master's server_id value. Valid ids are 32bit unsigned. -1 is
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* unread/error. */
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string master_host; /**< Master server host name. */
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int master_port; /**< Master server port. */
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bool slave_io_running; /**< Whether the slave I/O thread is running and connected. */
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bool slave_sql_running; /**< Whether or not the SQL thread is running. */
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string master_log_file; /**< Name of the master binary log file that the I/O thread is currently
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* reading from. */
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uint64_t read_master_log_pos; /**< Position up to which the I/O thread has read in the current master
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* binary log file. */
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Gtid gtid_io_pos; /**< Gtid I/O position of the slave thread. Only shows the triplet with
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* the current master domain. */
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string last_error; /**< Last IO or SQL error encountered. */
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SlaveStatusInfo();
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};
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// This class groups some miscellaneous replication related settings together.
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class ReplicationSettings
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{
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public:
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bool gtid_strict_mode; /**< Enable additional checks for replication */
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bool log_bin; /**< Is binary logging enabled */
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bool log_slave_updates; /**< Does the slave log replicated events to binlog */
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ReplicationSettings()
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: gtid_strict_mode(false)
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, log_bin(false)
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, log_slave_updates(false)
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{}
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};
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/**
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* Monitor specific information about a server
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*
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* Note: These are initialized in @c init_server_info
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*/
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class MySqlServerInfo
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{
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public:
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int64_t server_id; /**< Value of @@server_id. Valid values are 32bit unsigned. */
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int group; /**< Multi-master group where this server belongs,
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* 0 for servers not in groups */
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bool read_only; /**< Value of @@read_only */
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bool slave_configured; /**< Whether SHOW SLAVE STATUS returned rows */
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bool binlog_relay; /** Server is a Binlog Relay */
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int n_slaves_configured; /**< Number of configured slave connections*/
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int n_slaves_running; /**< Number of running slave connections */
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int slave_heartbeats; /**< Number of received heartbeats */
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double heartbeat_period; /**< The time interval between heartbeats */
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time_t latest_event; /**< Time when latest event was received from the master */
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int64_t gtid_domain_id; /**< The value of gtid_domain_id, the domain which is used for
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* new non-replicated events. */
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Gtid gtid_current_pos; /**< Gtid of latest event. Only shows the triplet
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* with the current master domain. */
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Gtid gtid_binlog_pos; /**< Gtid of latest event written to binlog. Only shows
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* the triplet with the current master domain. */
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SlaveStatusInfo slave_status; /**< Data returned from SHOW SLAVE STATUS */
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ReplicationSettings rpl_settings; /**< Miscellaneous replication related settings */
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mysql_server_version version; /**< Server version, 10.X, 5.5 or 5.1 */
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MySqlServerInfo();
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/**
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* Calculate how many events are left in the relay log. If gtid_current_pos is ahead of Gtid_IO_Pos,
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* or a server_id is unknown, an error value is returned.
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*
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* @return Number of events in relay log according to latest queried info. A negative value signifies
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* an error in the gtid-values.
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*/
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int64_t relay_log_events();
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};
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