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/* Copyright (C) 2000-2003 MySQL AB, 2008-2009 Sun Microsystems, Inc
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef RPL_MI_H
#define RPL_MI_H
#ifdef HAVE_REPLICATION
#include "rpl_rli.h"
#include "rpl_reporting.h"
#include "my_sys.h"
typedef struct st_mysql MYSQL;
/*****************************************************************************
Replication IO Thread
Master_info contains:
- information about how to connect to a master
- current master log name
- current master log offset
- misc control variables
Master_info is initialized once from the master.info file if such
exists. Otherwise, data members corresponding to master.info fields
are initialized with defaults specified by master-* options. The
initialization is done through init_master_info() call.
The format of master.info file:
log_name
log_pos
master_host
master_user
master_pass
master_port
master_connect_retry
To write out the contents of master.info file to disk ( needed every
time we read and queue data from the master ), a call to
flush_master_info() is required.
To clean up, call end_master_info()
*****************************************************************************/
class Master_info : public Slave_reporting_capability
{
public:
Master_info(bool is_slave_recovery);
~Master_info();
bool shall_ignore_server_id(ulong s_id);
/* the variables below are needed because we can change masters on the fly */
char master_log_name[FN_REFLEN];
char host[HOSTNAME_LENGTH+1];
char user[USERNAME_LENGTH+1];
char password[MAX_PASSWORD_LENGTH+1];
bool ssl; // enables use of SSL connection if true
char ssl_ca[FN_REFLEN], ssl_capath[FN_REFLEN], ssl_cert[FN_REFLEN];
char ssl_cipher[FN_REFLEN], ssl_key[FN_REFLEN];
bool ssl_verify_server_cert;
my_off_t master_log_pos;
File fd; // we keep the file open, so we need to remember the file pointer
IO_CACHE file;
mysql_mutex_t data_lock, run_lock;
mysql_cond_t data_cond, start_cond, stop_cond;
THD *io_thd;
MYSQL* mysql;
uint32 file_id; /* for 3.23 load data infile */
Relay_log_info rli;
uint port;
/*
to hold checksum alg in use until IO thread has received FD.
Initialized to novalue, then set to the queried from master
@@global.binlog_checksum and deactivated once FD has been received.
*/
uint8 checksum_alg_before_fd;
uint connect_retry;
#ifndef DBUG_OFF
int events_till_disconnect;
#endif
bool inited;
volatile bool abort_slave;
volatile uint slave_running;
volatile ulong slave_run_id;
/*
The difference in seconds between the clock of the master and the clock of
the slave (second - first). It must be signed as it may be <0 or >0.
clock_diff_with_master is computed when the I/O thread starts; for this the
I/O thread does a SELECT UNIX_TIMESTAMP() on the master.
"how late the slave is compared to the master" is computed like this:
clock_of_slave - last_timestamp_executed_by_SQL_thread - clock_diff_with_master
*/
long clock_diff_with_master;
/*
Keeps track of the number of events before fsyncing.
The option --sync-master-info determines how many
events should happen before fsyncing.
*/
uint sync_counter;
float heartbeat_period; // interface with CHANGE MASTER or master.info
ulonglong received_heartbeats; // counter of received heartbeat events
DYNAMIC_ARRAY ignore_server_ids;
ulong master_id;
};
void init_master_log_pos(Master_info* mi);
int init_master_info(Master_info* mi, const char* master_info_fname,
const char* slave_info_fname,
bool abort_if_no_master_info_file,
int thread_mask);
void end_master_info(Master_info* mi);
int flush_master_info(Master_info* mi,
bool flush_relay_log_cache,
bool need_lock_relay_log);
int change_master_server_id_cmp(ulong *id1, ulong *id2);
#endif /* HAVE_REPLICATION */
#endif /* RPL_MI_H */
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