You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
3.5 KiB
95 lines
3.5 KiB
/*
|
|
Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License, version 2.0,
|
|
as published by the Free Software Foundation.
|
|
|
|
This program is also distributed with certain software (including
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
|
as designated in a particular file or component or in included license
|
|
documentation. The authors of MySQL hereby grant you an additional
|
|
permission to link the program and your derivative works with the
|
|
separately licensed software that they have included with MySQL.
|
|
|
|
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, version 2.0, 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 "my_inttypes.h"
|
|
#include "plugin/semisync/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_ = false;
|
|
bool slave_enabled_ = false; /* semi-sycn is enabled on the slave */
|
|
MYSQL *mysql_reply = nullptr; /* connection to send reply */
|
|
};
|
|
|
|
/* System and status variables for the slave component */
|
|
extern bool 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 */
|
|
|