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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 02110-1335 USA */
#ifndef SEMISYNC_SLAVE_H
#define SEMISYNC_SLAVE_H
#include "semisync.h"
/**
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;
}
/* 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
* need_reply - (IN) whether the master is waiting for the reply
* 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, bool *need_reply,
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.
*
* Input:
* mysql - (IN) the mysql network connection
* binlog_filename - (IN) the reply point's binlog file name
* binlog_filepos - (IN) the reply point's binlog file offset
*
* Return:
* 0: success; non-zero: error
*/
int slaveReply(MYSQL *mysql, const char *binlog_filename,
my_off_t binlog_filepos);
int slaveStart(Binlog_relay_IO_param *param);
int slaveStop(Binlog_relay_IO_param *param);
private:
/* True when initObject has been called */
bool init_done_;
bool slave_enabled_; /* semi-sycn is enabled on the slave */
MYSQL *mysql_reply; /* connection to send reply */
};
/* System and status variables for the slave component */
extern char rpl_semi_sync_slave_enabled;
extern unsigned long rpl_semi_sync_slave_trace_level;
extern char rpl_semi_sync_slave_status;
#endif /* SEMISYNC_SLAVE_H */
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