A wrapper for log events/packets. More...

#include <pipeline_interfaces.h>

Public Member Functions
	Pipeline_event (Data_packet base_packet, Format_description_log_event fde_event, int modifier=UNDEFINED_EVENT_MODIFIER, enum_group_replication_consistency_level consistency_level=GROUP_REPLICATION_CONSISTENCY_EVENTUAL, Members_list *online_members=nullptr)
	Create a new pipeline wrapper based on a packet. More...

	Pipeline_event (Log_event base_event, Format_description_log_event fde_event, int modifier=UNDEFINED_EVENT_MODIFIER, enum_group_replication_consistency_level consistency_level=GROUP_REPLICATION_CONSISTENCY_EVENTUAL, Members_list *online_members=nullptr)
	Create a new pipeline wrapper based on a log event. More...

	~Pipeline_event ()

int	get_FormatDescription (Format_description_log_event **out_fde)
	Return current format description event. More...

int	get_LogEvent (Log_event **out_event)
	Return a log event. More...

void	set_LogEvent (Log_event *in_event)
	Sets the pipeline event's log event. More...

void	set_Packet (Data_packet *in_packet)
	Sets the pipeline event's packet. More...

int	get_Packet (Data_packet **out_packet)
	Return a packet. More...

Log_event_type	get_event_type ()
	Returns the event type. More...

void	mark_event (int modifier)
	Sets the event context flag. More...

int	get_event_context ()
	Returns the event context flag. More...

void	reset_pipeline_event ()
	Resets all variables in the event for reuse. More...

enum_group_replication_consistency_level	get_consistency_level ()
	Get transaction consistency level. More...

Members_list *	get_online_members ()
	Get the list of ONLINE Group members when a Transaction_with_guarantee_message message was received, or NULL if if any group member version is from a version lower than TRANSACTION_WITH_GUARANTEES_VERSION. More...

void	release_online_members_memory_ownership ()
	Release memory ownership of m_online_members. More...

void	set_delayed_view_change_waiting_for_consistent_transactions ()
	Set view change cannot be processed now and should be delayed due to consistent transaction. More...

bool	is_delayed_view_change_waiting_for_consistent_transactions ()
	Check if current view change is delayed due to consistent transaction. More...

void	set_delayed_view_change_resumed ()
	Allow resume the log of delayed views that were waiting for consistent transactions from previous view to complete. More...

bool	is_delayed_view_change_resumed ()
	Check if old view change processing is resumed. More...

Private Types
enum class	Processing_state { DEFAULT , DELAYED_VIEW_CHANGE_WAITING_FOR_CONSISTENT_TRANSACTIONS , DELAYED_VIEW_CHANGE_RESUMED }

Private Member Functions
int	convert_packet_to_log_event ()
	Converts the existing packet into a log event. More...

int	convert_log_event_to_packet ()
	Converts the existing log event into a packet. More...

Private Attributes
Data_packet *	packet

Log_event *	log_event

int	event_context

Format_description_log_event *	format_descriptor

enum_group_replication_consistency_level	m_consistency_level

Members_list *	m_online_members

bool	m_online_members_memory_ownership

Processing_state	m_packet_processing_state {Processing_state::DEFAULT}

Detailed Description

A wrapper for log events/packets.

This class allows for the marking of events and its transformation between the packet and log event formats as requested in the interface.

Note: Events can be marked as with event modifiers. This is a generic field allowing modifiers to vary with use context. If not specified, this field has a default value of 0.

Member Enumeration Documentation

◆ Processing_state

enum class Pipeline_event::Processing_state

strongprivate

Enumerator
DEFAULT
DELAYED_VIEW_CHANGE_WAITING_FOR_CONSISTENT_TRANSACTIONS
DELAYED_VIEW_CHANGE_RESUMED

Constructor & Destructor Documentation

◆ Pipeline_event() [1/2]

Pipeline_event::Pipeline_event	(	Data_packet *	base_packet,
		Format_description_log_event *	fde_event,
		int	modifier = `UNDEFINED_EVENT_MODIFIER`,
		enum_group_replication_consistency_level	consistency_level = `GROUP_REPLICATION_CONSISTENCY_EVENTUAL`,
		Members_list *	online_members = `nullptr`
	)

inline

Create a new pipeline wrapper based on a packet.

Note: If a modifier is not provided the event will be marked as UNDEFINED

Parameters

[in]	base_packet	the wrapper packet
[in]	fde_event	the format description event for conversions
[in]	modifier	the event modifier
[in]	consistency_level	the transaction consistency level
[in]	online_members	the ONLINE members when the transaction message was delivered

◆ Pipeline_event() [2/2]

Pipeline_event::Pipeline_event	(	Log_event *	base_event,
		Format_description_log_event *	fde_event,
		int	modifier = `UNDEFINED_EVENT_MODIFIER`,
		enum_group_replication_consistency_level	consistency_level = `GROUP_REPLICATION_CONSISTENCY_EVENTUAL`,
		Members_list *	online_members = `nullptr`
	)

inline

Create a new pipeline wrapper based on a log event.

Note: If a modifier is not provided the event will be marked as UNDEFINED

Parameters

[in]	base_event	the wrapper log event
[in]	fde_event	the format description event for conversions
[in]	modifier	the event modifier
[in]	consistency_level	the transaction consistency level
[in]	online_members	the ONLINE members when the transaction message was delivered

◆ ~Pipeline_event()

Pipeline_event::~Pipeline_event ( )

inline

Member Function Documentation

◆ convert_log_event_to_packet()

int Pipeline_event::convert_log_event_to_packet ( )

inlineprivate

Converts the existing log event into a packet.

Returns: the operation status

Return values

0	OK
!=0	Error on log event conversion

◆ convert_packet_to_log_event()

int Pipeline_event::convert_packet_to_log_event ( )

inlineprivate

Converts the existing packet into a log event.

Returns: the operation status

Return values

0	OK
1	Error on packet conversion

◆ get_consistency_level()

enum_group_replication_consistency_level Pipeline_event::get_consistency_level ( )

inline

Get transaction consistency level.

◆ get_event_context()

int Pipeline_event::get_event_context ( )

inline

Returns the event context flag.

◆ get_event_type()

Log_event_type Pipeline_event::get_event_type ( )

inline

Returns the event type.

Be it a Log_event or Packet, it's marked with a type we can extract.

Returns: the pipeline event type

◆ get_FormatDescription()

int Pipeline_event::get_FormatDescription ( Format_description_log_event ** out_fde )

inline

Return current format description event.

Parameters

[out] out_fde the outputted format description event

Returns: Operation status

Return values

0 OK

◆ get_LogEvent()

int Pipeline_event::get_LogEvent ( Log_event ** out_event )

inline

Return a log event.

If one does not exist, the contained packet will be converted into one.

Parameters

[out] out_event the outputted log event

Returns: Operation status

Return values

0	OK
!=0	error on conversion

◆ get_online_members()

Members_list * Pipeline_event::get_online_members ( )

inline

Get the list of ONLINE Group members when a Transaction_with_guarantee_message message was received, or NULL if if any group member version is from a version lower than TRANSACTION_WITH_GUARANTEES_VERSION.

For Transaction_message messages it always return NULL

Returns: list of all ONLINE members, if all members have version equal or greater than TRANSACTION_WITH_GUARANTEES_VERSION for Transaction_with_guarantee_message messages otherwise NULL

Note: the memory allocated for the list ownership belongs to the caller

◆ get_Packet()

int Pipeline_event::get_Packet ( Data_packet ** out_packet )

inline

Return a packet.

If one does not exist, the contained log event will be converted into one.

Parameters

[out] out_packet the outputted packet

Returns: the operation status

Return values

0	OK
!=0	error on conversion

◆ is_delayed_view_change_resumed()

bool Pipeline_event::is_delayed_view_change_resumed ( )

inline

Check if old view change processing is resumed.

Returns: is event being processed from queue

Return values

true	event is being processed from queue
false	event is not being processed from queue

◆ is_delayed_view_change_waiting_for_consistent_transactions()

bool Pipeline_event::is_delayed_view_change_waiting_for_consistent_transactions ( )

inline

Check if current view change is delayed due to consistent transaction.

Returns: is event being queued for later processing

Return values

true	event is being queued
false	event is not being queued

◆ mark_event()

void Pipeline_event::mark_event ( int modifier )

inline

Sets the event context flag.

Parameters

[in] modifier the event modifier

◆ release_online_members_memory_ownership()

void Pipeline_event::release_online_members_memory_ownership ( )

inline

Release memory ownership of m_online_members.

◆ reset_pipeline_event()

void Pipeline_event::reset_pipeline_event ( )

inline

Resets all variables in the event for reuse.

Possible existing events/packets are deleted. The context flag is reset to UNDEFINED. Error messages are deleted.

Format description events, are NOT deleted. This is due to the fact that they are given, and do not belong to the pipeline event.

Transaction consistency level is not reset, despite the event is reset, consistency level belongs to the transaction.

◆ set_delayed_view_change_resumed()

void Pipeline_event::set_delayed_view_change_resumed ( )

inline

Allow resume the log of delayed views that were waiting for consistent transactions from previous view to complete.

◆ set_delayed_view_change_waiting_for_consistent_transactions()

void Pipeline_event::set_delayed_view_change_waiting_for_consistent_transactions ( )

inline

Set view change cannot be processed now and should be delayed due to consistent transaction.

◆ set_LogEvent()

void Pipeline_event::set_LogEvent ( Log_event * in_event )

inline

Sets the pipeline event's log event.

Note: This methods assume you have called reset_pipeline_event

Parameters

[in] in_event the given log event

◆ set_Packet()

void Pipeline_event::set_Packet ( Data_packet * in_packet )

inline

Sets the pipeline event's packet.

Note: This methods assume you have called reset_pipeline_event

Parameters

[in] in_packet the given packet

Member Data Documentation

◆ event_context

int Pipeline_event::event_context

private

◆ format_descriptor

Format_description_log_event* Pipeline_event::format_descriptor

private

◆ log_event

Log_event* Pipeline_event::log_event

private

◆ m_consistency_level

enum_group_replication_consistency_level Pipeline_event::m_consistency_level

private

◆ m_online_members

Members_list* Pipeline_event::m_online_members

private

◆ m_online_members_memory_ownership

bool Pipeline_event::m_online_members_memory_ownership

private

◆ m_packet_processing_state

Processing_state Pipeline_event::m_packet_processing_state {Processing_state::DEFAULT}

private

◆ packet

Data_packet* Pipeline_event::packet

private

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

plugin/group_replication/include/pipeline_interfaces.h

Public Member Functions

Private Types

Private Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

◆ Processing_state

Constructor & Destructor Documentation

◆ Pipeline_event() [1/2]

◆ Pipeline_event() [2/2]

◆ ~Pipeline_event()

Member Function Documentation

◆ convert_log_event_to_packet()

◆ convert_packet_to_log_event()

◆ get_consistency_level()

◆ get_event_context()

◆ get_event_type()

◆ get_FormatDescription()

◆ get_LogEvent()

◆ get_online_members()

◆ get_Packet()

◆ is_delayed_view_change_resumed()

◆ is_delayed_view_change_waiting_for_consistent_transactions()

◆ mark_event()

◆ release_online_members_memory_ownership()

◆ reset_pipeline_event()

◆ set_delayed_view_change_resumed()

◆ set_delayed_view_change_waiting_for_consistent_transactions()

◆ set_LogEvent()

◆ set_Packet()

Member Data Documentation

◆ event_context

◆ format_descriptor

◆ log_event

◆ m_consistency_level

◆ m_online_members

◆ m_online_members_memory_ownership

◆ m_packet_processing_state

◆ packet