binary_log::View_change_event Class Reference

This class is used to add view change markers in the binary log when a member of the group enters or leaves the group. More...

#include <control_events.h>

Inheritance diagram for binary_log::View_change_event:

Public Member Functions
	View_change_event (const char *buf, const Format_description_event *fde)
	Decodes the view_change_log_event generated in case a server enters or leaves the group. More...
	View_change_event (const char *raw_view_id)
	~View_change_event () override
	Destructor of the View_change_event class. More...
Public Member Functions inherited from binary_log::Binary_log_event
virtual	~Binary_log_event ()=0
	Binary_log_event (const Binary_log_event &)=default
	Binary_log_event (Binary_log_event &&)=default
Binary_log_event &	operator= (const Binary_log_event &)=default
Binary_log_event &	operator= (Binary_log_event &&)=default
enum Log_event_type	get_event_type () const
	Helper method. More...
const Log_event_header *	header () const
	Return a const pointer to the header of the log event. More...
Log_event_header *	header ()
	Return a non-const pointer to the header of the log event. More...
const Log_event_footer *	footer () const
	Return a const pointer to the footer of the log event. More...
Log_event_footer *	footer ()
	Return a non-const pointer to the footer of the log event. More...
Event_reader &	reader ()
	Returns a reference to the event Event_reader object. More...

Protected Attributes
char	view_id [ENCODED_VIEW_ID_MAX_LEN]
long long int	seq_number
std::map< std::string, std::string >	certification_info

Static Protected Attributes
static const int	ENCODED_VIEW_ID_OFFSET = 0
static const int	ENCODED_SEQ_NUMBER_OFFSET = 40
static const int	ENCODED_CERT_INFO_SIZE_OFFSET = 48
static const int	ENCODED_VIEW_ID_MAX_LEN = 40
static const int	ENCODED_CERT_INFO_KEY_SIZE_LEN = 2
static const int	ENCODED_CERT_INFO_VALUE_LEN = 4

Additional Inherited Members
Public Types inherited from binary_log::Binary_log_event
enum	enum_post_header_length {   QUERY_HEADER_MINIMAL_LEN = (4 + 4 + 1 + 2) , QUERY_HEADER_LEN = (QUERY_HEADER_MINIMAL_LEN + 2) , STOP_HEADER_LEN = 0 , START_V3_HEADER_LEN = (2 + ST_SERVER_VER_LEN + 4) ,   ROTATE_HEADER_LEN = 8 , INTVAR_HEADER_LEN = 0 , APPEND_BLOCK_HEADER_LEN = 4 , DELETE_FILE_HEADER_LEN = 4 ,   RAND_HEADER_LEN = 0 , USER_VAR_HEADER_LEN = 0 , FORMAT_DESCRIPTION_HEADER_LEN = (START_V3_HEADER_LEN + 1 + LOG_EVENT_TYPES) , XID_HEADER_LEN = 0 ,   BEGIN_LOAD_QUERY_HEADER_LEN = APPEND_BLOCK_HEADER_LEN , ROWS_HEADER_LEN_V1 = 8 , TABLE_MAP_HEADER_LEN = 8 , EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN = (4 + 4 + 4 + 1) ,   EXECUTE_LOAD_QUERY_HEADER_LEN , INCIDENT_HEADER_LEN = 2 , HEARTBEAT_HEADER_LEN = 0 , IGNORABLE_HEADER_LEN = 0 ,   ROWS_HEADER_LEN_V2 = 10 , TRANSACTION_CONTEXT_HEADER_LEN = 18 , VIEW_CHANGE_HEADER_LEN = 52 , XA_PREPARE_HEADER_LEN = 0 ,   TRANSACTION_PAYLOAD_HEADER_LEN = 0 }
	The lengths for the fixed data part of each event. More...
Static Public Attributes inherited from binary_log::Binary_log_event
static const int	LOG_EVENT_TYPES = (ENUM_END_EVENT - 1)
Protected Member Functions inherited from binary_log::Binary_log_event
	Binary_log_event (Log_event_type type_code)
	This constructor is used to initialize the type_code of header object m_header. More...
	Binary_log_event (const char **buf, const Format_description_event *fde)
	This constructor will create a new object of Log_event_header and initialize the variable m_header, which in turn will be used to initialize Log_event's member common_header. More...

Detailed Description

This class is used to add view change markers in the binary log when a member of the group enters or leaves the group.

Name

Format

Description

view_id

40 length character array

This is used to store the view id value of the new view change when a node add or leaves the group.

seq_number

8 bytes integer

Variable to identify the next sequence number to be allotted to the certified transaction.

certification_info

variable length map to store the certification data.

Map to store the certification info ie. the hash of write_set and the snapshot sequence value.

Constructor & Destructor Documentation

View_change_event() [1/2]

binary_log::View_change_event::View_change_event	(	const char *	buf,
		const Format_description_event *	fde
	)

Decodes the view_change_log_event generated in case a server enters or leaves the group.

The buffer layout is as follows

Parameters

buf	Contains the serialized event.
fde	An FDE event (see Rotate_event constructor for more info).

View_change_event() [2/2]

binary_log::View_change_event::View_change_event ( const char *  raw_view_id )

explicit

~View_change_event()

binary_log::View_change_event::~View_change_event ( )

override

Destructor of the View_change_event class.

Member Data Documentation

certification_info

std::map<std::string, std::string> binary_log::View_change_event::certification_info

protected

ENCODED_CERT_INFO_KEY_SIZE_LEN

const int binary_log::View_change_event::ENCODED_CERT_INFO_KEY_SIZE_LEN = 2

staticprotected

ENCODED_CERT_INFO_SIZE_OFFSET

const int binary_log::View_change_event::ENCODED_CERT_INFO_SIZE_OFFSET = 48

staticprotected

ENCODED_CERT_INFO_VALUE_LEN

const int binary_log::View_change_event::ENCODED_CERT_INFO_VALUE_LEN = 4

staticprotected

ENCODED_SEQ_NUMBER_OFFSET

const int binary_log::View_change_event::ENCODED_SEQ_NUMBER_OFFSET = 40

staticprotected

ENCODED_VIEW_ID_MAX_LEN

const int binary_log::View_change_event::ENCODED_VIEW_ID_MAX_LEN = 40

staticprotected

ENCODED_VIEW_ID_OFFSET

const int binary_log::View_change_event::ENCODED_VIEW_ID_OFFSET = 0

staticprotected

seq_number

long long int binary_log::View_change_event::seq_number

protected

view_id

char binary_log::View_change_event::view_id[ENCODED_VIEW_ID_MAX_LEN]

protected

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

• libbinlogevents/include/control_events.h
• libbinlogevents/src/control_events.cpp