#pragma once
#ifndef _MYSQLMON_H
#define _MYSQLMON_H
/*
 * Copyright (c) 2016 MariaDB Corporation Ab
 *
 * Use of this software is governed by the Business Source License included
 * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
 *
 * Change Date: 2020-01-01
 *
 * On the date above, in accordance with the Business Source License, use
 * of this software will be governed by version 2 or later of the General
 * Public License.
 */

/**
 * @file mysqlmon.h - The MySQL monitor
 *
 * @verbatim
 * Revision History
 *
 * Date     Who                 Description
 * 08/07/13 Mark Riddoch        Initial implementation
 * 26/05/14 Massimiliano Pinto  Default values for MONITOR_INTERVAL
 * 28/05/14 Massimiliano Pinto  Addition of new fields in MYSQL_MONITOR struct
 * 24/06/14 Massimiliano Pinto  Addition of master field in MYSQL_MONITOR struct and MONITOR_MAX_NUM_SLAVES
 * 28/08/14 Massimiliano Pinto  Addition of detectStaleMaster
 * 30/10/14 Massimiliano Pinto  Addition of disableMasterFailback
 * 07/11/14 Massimiliano Pinto  Addition of NetworkTimeout: connect, read, write
 * 20/04/15 Guillaume Lefranc   Addition of availableWhenDonor
 * 22/04/15 Martin Brampton     Addition of disableMasterRoleSetting
 * 07/05/15 Markus Makela       Addition of command execution on Master server failure
 * @endverbatim
 */

#include <maxscale/cdefs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <maxscale/monitor.h>
#include <maxscale/spinlock.h>
#include <maxscale/thread.h>
#include <mysql.h>
#include <mysqld_error.h>
#include <maxscale/log_manager.h>
#include <maxscale/secrets.h>
#include <maxscale/dcb.h>
#include <maxscale/modinfo.h>
#include <maxscale/config.h>
#include <maxscale/hashtable.h>

MXS_BEGIN_DECLS

/**
 * The handle for an instance of a MySQL Monitor module
 */
typedef struct
{
    THREAD thread; /**< Monitor thread */
    int shutdown; /**< Flag to shutdown the monitor thread */
    int status; /**< Monitor status */
    unsigned long id; /**< Monitor ID */
    int replicationHeartbeat; /**< Monitor flag for MySQL replication heartbeat */
    bool detectStaleMaster; /**< Monitor flag for MySQL replication Stale Master detection */
    bool detectStaleSlave; /**< Monitor flag for MySQL replication Stale Master detection */
    bool multimaster; /**< Detect and handle multi-master topologies */
    int disableMasterFailback; /**< Monitor flag for Galera Cluster Master failback */
    int availableWhenDonor; /**< Monitor flag for Galera Cluster Donor availability */
    int disableMasterRoleSetting; /**< Monitor flag to disable setting master role */
    bool mysql51_replication; /**< Use MySQL 5.1 replication */
    MXS_MONITOR_SERVERS *master; /**< Master server for MySQL Master/Slave replication */
    char* script; /*< Script to call when state changes occur on servers */
    uint64_t events; /*< enabled events */
    HASHTABLE *server_info; /**< Contains server specific information */
    bool detect_standalone_master; /**< If standalone master are detected */
    int failcount; /**< How many monitoring cycles servers must be
                                   down before failover is initiated */
    bool allow_cluster_recovery; /**< Allow failed servers to rejoin the cluster */
    bool warn_failover; /**< Log a warning when failover happens */
    bool load_journal; /**< Whether journal file should be loaded */
    time_t journal_max_age; /**< Maximum age of journal file */
    bool allow_external_slaves; /**< Whether to allow usage of external slave servers */
    MXS_MONITOR* monitor;
} MYSQL_MONITOR;

/**
 * @brief Store a journal of server states
 *
 * @param monitor Monitor to journal
 */
void store_server_journal(MXS_MONITOR *monitor);

/**
 * @brief Load a journal of server states
 *
 * @param monitor Monitor where journal is loaded
 */
void load_server_journal(MXS_MONITOR *monitor);

/**
 * @brief Remove stored journal file
 *
 * @param monitor Monitor whose journal is removed
 */
void remove_server_journal(MXS_MONITOR *monitor);

/**
 * @brief Check whether the journal is too old
 *
 * @param monitor Monitor to check
 * @return True if journal is stale or an error occurred while reading the file.
 * False if the file is still valid.
 */
bool journal_is_stale(MXS_MONITOR *monitor, time_t max_age);

MXS_END_DECLS

#endif