AckContainer Class Reference

AckContainer stores received acks internally and tell the caller the ack's position when a transaction is fully acknowledged, so it can wake up the waiting transactions. More...

#include <semisync_source.h>

Inheritance diagram for AckContainer:

Public Member Functions
	AckContainer ()
	~AckContainer ()
void	clear ()
	Clear the content of the ack array. More...
int	resize (unsigned int size, const AckInfo **ackinfo)
	Adjust capacity for the container and report the ack to semisync master, if it is full. More...
const AckInfo *	insert (int server_id, const char *log_file_name, my_off_t log_file_pos)
	Insert an ack's information into the container and report the minimum ack to semisync master if it is full. More...
const AckInfo *	insert (const AckInfo &ackinfo)
Public Member Functions inherited from Trace
void	function_enter (const char *func_name)
int	function_exit (const char *func_name, int exit_code)
bool	function_exit (const char *func_name, bool exit_code)
void	function_exit (const char *func_name)
	Trace ()
	Trace (unsigned long trace_level)

Private Member Functions
	AckContainer (AckContainer &container)
AckContainer &	operator= (const AckContainer &container)
bool	full ()
unsigned int	size ()
void	remove_all (const char *log_file_name, my_off_t log_file_pos)
	Remove all acks which equal to the given position. More...
unsigned int	updateIfExist (int server_id, const char *log_file_name, my_off_t log_file_pos)
	Update a slave's ack into the container if another ack of the slave is already in it. More...
AckInfo *	minAck (const char *log_file_name, my_off_t log_file_pos)
	Find the minimum ack which is smaller than given position. More...

Private Attributes
AckInfo	m_greatest_ack
AckInfo *	m_ack_array
unsigned int	m_size
unsigned int	m_empty_slot

Additional Inherited Members
Public Attributes inherited from Trace
unsigned long	trace_level_
Static Public Attributes inherited from Trace
static const unsigned long	kTraceFunction = 0x0040
static const unsigned long	kTraceGeneral = 0x0001
static const unsigned long	kTraceDetail = 0x0010
static const unsigned long	kTraceNetWait = 0x0020

Detailed Description

AckContainer stores received acks internally and tell the caller the ack's position when a transaction is fully acknowledged, so it can wake up the waiting transactions.

Constructor & Destructor Documentation

AckContainer() [1/2]

AckContainer::AckContainer ( )

inline

~AckContainer()

AckContainer::~AckContainer ( )

inline

AckContainer() [2/2]

AckContainer::AckContainer ( AckContainer &  container )

private

Member Function Documentation

clear()

void AckContainer::clear ( )

inline

Clear the content of the ack array.

full()

bool AckContainer::full ( )

inlineprivate

insert() [1/2]

const AckInfo * AckContainer::insert ( const AckInfo &  ackinfo )

inline

insert() [2/2]

const AckInfo * AckContainer::insert	(	int	server_id,
		const char *	log_file_name,
		my_off_t	log_file_pos
	)

Insert an ack's information into the container and report the minimum ack to semisync master if it is full.

Parameters

[in]	server_id	slave server_id of the ack
[in]	log_file_name	binlog file name of the ack
[in]	log_file_pos	binlog file position of the ack

Returns

Pointer of an ack if the ack should be reported to semisync master. Otherwise, NULL is returned.

minAck()

AckInfo * AckContainer::minAck ( const char *  log_file_name, my_off_t  log_file_pos  )

inlineprivate

Find the minimum ack which is smaller than given position.

When more than one slots are minimum acks, it returns the one has smallest index.

Parameters

[in]	log_file_name	binlog file name
[in]	log_file_pos	binlog file position

Returns

NULL if no ack is smaller than given position, otherwise return its pointer.

operator=()

AckContainer & AckContainer::operator= ( const AckContainer &  container )

private

remove_all()

void AckContainer::remove_all ( const char *  log_file_name, my_off_t  log_file_pos  )

inlineprivate

Remove all acks which equal to the given position.

Parameters

[in]	log_file_name	binlog name of the ack that should be removed
[in]	log_file_pos	binlog position of the ack that should removed

resize()

int AckContainer::resize	(	unsigned int	size,
		const AckInfo **	ackinfo
	)

Adjust capacity for the container and report the ack to semisync master, if it is full.

Parameters

[in]	size	size of the container.
	ackinfo	Acknowledgement information

Returns

0 if succeeds, otherwise fails.

size()

unsigned int AckContainer::size ( )

inlineprivate

updateIfExist()

unsigned int AckContainer::updateIfExist ( int  server_id, const char *  log_file_name, my_off_t  log_file_pos  )

inlineprivate

Update a slave's ack into the container if another ack of the slave is already in it.

Parameters

[in]	server_id	server_id of the ack
[in]	log_file_name	binlog file name of the ack
[in]	log_file_pos	binlog file position of the ack

Returns

index of the slot that is updated. if it equals to the size of container, then no slot is updated.

Member Data Documentation

m_ack_array

AckInfo* AckContainer::m_ack_array

private

m_empty_slot

unsigned int AckContainer::m_empty_slot

private

m_greatest_ack

AckInfo AckContainer::m_greatest_ack

private

m_size

unsigned int AckContainer::m_size

private

---

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

• plugin/semisync/semisync_source.h
• plugin/semisync/semisync_source.cc