Binlog_transmit_observer Struct Reference

#include <replication.h>

List of all members.

Public Attributes
uint32	len
int(*	transmit_start )(Binlog_transmit_param *param, const char *log_file, my_off_t log_pos)
int(*	transmit_stop )(Binlog_transmit_param *param)
int(*	reserve_header )(Binlog_transmit_param *param, unsigned char *header, unsigned long size, unsigned long *len)
int(*	before_send_event )(Binlog_transmit_param *param, unsigned char *packet, unsigned long len, const char *log_file, my_off_t log_pos)
int(*	after_send_event )(Binlog_transmit_param *param, const char *event_buf, unsigned long len, const char *skipped_log_file, my_off_t skipped_log_pos)
int(*	after_reset_master )(Binlog_transmit_param *param)

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Detailed Description

Observe and extends the binlog dumping thread.

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Member Data Documentation

int(* Binlog_transmit_observer::after_reset_master)(Binlog_transmit_param *param)

This callback is called after resetting master status

This is called when executing the command RESET MASTER, and is used to reset status variables added by observers.

Parameters:

param

Observer common parameter

Return values:

0	Sucess
1	Failure

int(* Binlog_transmit_observer::after_send_event)(Binlog_transmit_param *param, const char *event_buf, unsigned long len, const char *skipped_log_file, my_off_t skipped_log_pos)

This callback is called after an event packet is sent to the slave or is skipped.

Parameters:

param	Observer common parameter
event_buf	Binlog event packet buffer sent
len	length of the event packet buffer
skipped_log_file	Binlog file name of the event that was skipped in the master. This is null if the position was not skipped
skipped_log_pos	Binlog position of the event that was skipped in the master. 0 if not skipped

Return values:

0	Sucess
1	Failure

int(* Binlog_transmit_observer::before_send_event)(Binlog_transmit_param *param, unsigned char *packet, unsigned long len, const char *log_file, my_off_t log_pos)

This callback is called before sending an event packet to slave

Parameters:

param	Observer common parameter
packet	Binlog event packet to send
len	Length of the event packet
log_file	Binlog file name of the event packet to send
log_pos	Binlog position of the event packet to send

Return values:

0	Sucess
1	Failure

int(* Binlog_transmit_observer::reserve_header)(Binlog_transmit_param *param, unsigned char *header, unsigned long size, unsigned long *len)

This callback is called to reserve bytes in packet header for event transmission

This callback is called when resetting transmit packet header to reserve bytes for this observer in packet header.

The header buffer is allocated by the server code, and size is the size of the header buffer. Each observer can only reserve a maximum size of size in the header.

Parameters:

param	Observer common parameter
header	Pointer of the header buffer
size	Size of the header buffer
len	Header length reserved by this observer

Return values:

0	Sucess
1	Failure

int(* Binlog_transmit_observer::transmit_start)(Binlog_transmit_param *param, const char *log_file, my_off_t log_pos)

This callback is called when binlog dumping starts

Parameters:

param	Observer common parameter
log_file	Binlog file name to transmit from
log_pos	Binlog position to transmit from

Return values:

0	Sucess
1	Failure

int(* Binlog_transmit_observer::transmit_stop)(Binlog_transmit_param *param)

This callback is called when binlog dumping stops

Parameters:

param

Observer common parameter

Return values:

0	Sucess
1	Failure

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The documentation for this struct was generated from the following file:

• replication.h