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/* Copyright (c) 2006 MySQL AB, 2009 Sun Microsystems, Inc.
Use is subject to license terms.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#ifndef SEMISYNC_SLAVE_H
#define SEMISYNC_SLAVE_H
#include "semisync.h"
#include "my_global.h"
#include "sql_priv.h"
#include "rpl_mi.h"
#include "mysql.h"
class Master_info;
/**
The extension class for the slave of semi-synchronous replication
*/
class ReplSemiSyncSlave
:public ReplSemiSyncBase {
public:
ReplSemiSyncSlave()
:slave_enabled_(false)
{}
~ReplSemiSyncSlave() {}
void setTraceLevel(unsigned long trace_level) {
trace_level_ = trace_level;
}
/* Initialize this class after MySQL parameters are initialized. this
* function should be called once at bootstrap time.
*/
int initObject();
bool getSlaveEnabled() {
return slave_enabled_;
}
void setSlaveEnabled(bool enabled) {
slave_enabled_ = enabled;
}
bool isDelayMaster(){
return delay_master_;
}
void setDelayMaster(bool enabled) {
delay_master_ = enabled;
}
void setKillConnTimeout(unsigned int timeout) {
kill_conn_timeout_ = timeout;
}
/* A slave reads the semi-sync packet header and separate the metadata
* from the payload data.
*
* Input:
* header - (IN) packet header pointer
* total_len - (IN) total packet length: metadata + payload
* semi_flags - (IN) store flags: SEMI_SYNC_SLAVE_DELAY_SYNC and SEMI_SYNC_NEED_ACK
* payload - (IN) payload: the replication event
* payload_len - (IN) payload length
*
* Return:
* 0: success; non-zero: error
*/
int slaveReadSyncHeader(const char *header, unsigned long total_len, int *semi_flags,
const char **payload, unsigned long *payload_len);
/* A slave replies to the master indicating its replication process. It
* indicates that the slave has received all events before the specified
* binlog position.
*/
int slaveReply(Master_info* mi);
int slaveStart(Master_info *mi);
int slaveStop(Master_info *mi);
int requestTransmit(Master_info*);
void killConnection(MYSQL *mysql);
int resetSlave(Master_info *mi);
private:
/* True when initObject has been called */
bool init_done_;
bool slave_enabled_; /* semi-sycn is enabled on the slave */
bool delay_master_;
unsigned int kill_conn_timeout_;
};
/* System and status variables for the slave component */
extern my_bool rpl_semi_sync_slave_enabled;
extern my_bool rpl_semi_sync_slave_status;
extern ulong rpl_semi_sync_slave_trace_level;
extern ReplSemiSyncSlave repl_semisync_slave;
extern char rpl_semi_sync_slave_delay_master;
extern unsigned int rpl_semi_sync_slave_kill_conn_timeout;
extern unsigned long long rpl_semi_sync_slave_send_ack;
#endif /* SEMISYNC_SLAVE_H */
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