mysql::binlog::event::codecs::binary::Heartbeat Class Reference

Binary codec for the heartbeat log event. More...

#include <binary.h>

Inheritance diagram for mysql::binlog::event::codecs::binary::Heartbeat:

Public Types
enum	fields { OTW_HB_HEADER_END_MARK = 0 , OTW_HB_LOG_FILENAME_FIELD = 1 , OTW_HB_LOG_POSITION_FIELD = 2 }
	The on-the-wire fields. More...

Public Member Functions
	Heartbeat ()
std::pair< std::size_t, bool >	decode (const unsigned char *from, std::size_t size, Binary_log_event &to) const override
	This member function shall decode the contents of the buffer provided and fill in the event referenced. More...
std::pair< std::size_t, bool >	encode (const Binary_log_event &from, unsigned char *to, std::size_t size) const override
	This member function shall encode the contents of the event referenced and store the result in the buffer provided. More...
Public Member Functions inherited from mysql::binlog::event::codecs::binary::Base_codec
	Base_codec ()=default
	Base_codec (Base_codec &&) noexcept=default
Base_codec &	operator= (Base_codec &&) noexcept=default
	Base_codec (const Base_codec &) noexcept=default
Base_codec &	operator= (const Base_codec &)=default
	~Base_codec () override=default
Public Member Functions inherited from mysql::binlog::event::codecs::Codec
virtual	~Codec ()=default

Additional Inherited Members
Protected Member Functions inherited from mysql::binlog::event::codecs::binary::Base_codec
Event_reader &	reader ()
Protected Attributes inherited from mysql::binlog::event::codecs::binary::Base_codec
Event_reader *	m_reader = nullptr

Detailed Description

Binary codec for the heartbeat log event.

Member Enumeration Documentation

fields

enum mysql::binlog::event::codecs::binary::Heartbeat::fields

The on-the-wire fields.

Enumerator
OTW_HB_HEADER_END_MARK	Marks the end of the fields.
OTW_HB_LOG_FILENAME_FIELD	The log file name.
OTW_HB_LOG_POSITION_FIELD	The log position field.

Constructor & Destructor Documentation

Heartbeat()

mysql::binlog::event::codecs::binary::Heartbeat::Heartbeat ( )

inline

Member Function Documentation

decode()

std::pair< std::size_t, bool > mysql::binlog::event::codecs::binary::Heartbeat::decode ( const unsigned char *  from, std::size_t  size, Binary_log_event &  to  ) const

overridevirtual

This member function shall decode the contents of the buffer provided and fill in the event referenced.

This is the decoder member function for decoding heartbeats.

Note that the event provided needs to be of type HEARTBEAT_EVENT_V2.

Parameters

from	the buffer to decode
size	the size of the buffer to decode.
to	the event to store the decoded information into.

Returns

a pair containing the amount of bytes decoded and whether there was an error or not. False if no error, true otherwise.

Note that the log event must have the appropriate type code: HEARTBEAT_LOG_EVENT to be compatible with this specific decoder. If it is not, an error shall be returned

Parameters

from	the buffer to decode from.
size	the buffer size.
to	The log event to decode to.

Returns

a pair containing the number of bytes decoded and whether there was an error or not. False if no error, true otherwise.

Implements mysql::binlog::event::codecs::binary::Base_codec.

encode()

std::pair< std::size_t, bool > mysql::binlog::event::codecs::binary::Heartbeat::encode ( const Binary_log_event &  from, unsigned char *  to, std::size_t  size  ) const

overridevirtual

This member function shall encode the contents of the event referenced and store the result in the buffer provided.

This is the encoder member function for the heartbeat event.

Note that the event referenced needs to be of type HEARTBEAT_EVENT_V2.

Parameters

from	the event to encode.
to	the buffer where to store the encoded event.
size	the size of the buffer.

Returns

a pair containing the amount of bytes encoded and whether there was an error or not.

Note that the log event must have the appropriate type code: HEARTBEAT_LOG_EVENT to be compatible with this specific enccoder. If it is not, an error shall be returned

Parameters

from	The log event to decode to.
to	the buffer to decode from.
size	the buffer size.

Returns

a pair containing the number of bytes decoded and whether there was an error or not. False if no error, true otherwise.

Implements mysql::binlog::event::codecs::binary::Base_codec.

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The documentation for this class was generated from the following files:

• libs/mysql/binlog/event/codecs/binary.h
• libs/mysql/binlog/event/codecs/binary.cpp