Slave_reporting_capability Class Reference

Mix-in to handle the message logging and reporting for relay log info and master log info structures. More...

#include <rpl_reporting.h>

Inheritance diagram for Slave_reporting_capability:

Classes
class	Error
	Error information structure. More...

Public Member Functions
	Slave_reporting_capability (char const *thread_name)
	Constructor. More...
virtual void	report (loglevel level, int err_code, const char *msg,...) const
	Writes a message and, if it's an error message, to Last_Error (which will be displayed by SHOW SLAVE STATUS). More...
void	va_report (loglevel level, int err_code, const char *prefix_msg, const char *msg, va_list v_args) const
void	clear_error ()
	Clear errors. More...
int	has_temporary_error (THD *thd, uint error_arg=0, bool *silent=nullptr) const
	Check if the current error is of temporary nature or not. More...
Error const &	last_error () const
bool	is_error () const
virtual const char *	get_for_channel_str (bool upper_case) const =0
virtual	~Slave_reporting_capability ()=0

Public Attributes
mysql_mutex_t	err_lock
	lock used to synchronize m_last_error on 'SHOW SLAVE STATUS' More...

Protected Member Functions
virtual void	do_report (loglevel level, int err_code, const char *msg, va_list v_args) const

Protected Attributes
Error	m_last_error
	Last error produced by the I/O or SQL thread respectively. More...

Private Member Functions
	Slave_reporting_capability (const Slave_reporting_capability &rhs)
Slave_reporting_capability &	operator= (const Slave_reporting_capability &rhs)

Private Attributes
char const *const	m_thread_name

Detailed Description

Mix-in to handle the message logging and reporting for relay log info and master log info structures.

By inheriting from this class, the class is imbued with capabilities to do slave reporting.

Constructor & Destructor Documentation

Slave_reporting_capability() [1/2]

Slave_reporting_capability::Slave_reporting_capability

(

char const *

thread_name

)

Constructor.

Parameters

thread_name

Printable name of the slave thread that is reporting.

~Slave_reporting_capability()

Slave_reporting_capability::~Slave_reporting_capability ( )

pure virtual

Slave_reporting_capability() [2/2]

Slave_reporting_capability::Slave_reporting_capability ( const Slave_reporting_capability &  rhs )

private

Member Function Documentation

clear_error()

void Slave_reporting_capability::clear_error ( )

inline

Clear errors.

They will not show up under SHOW SLAVE STATUS.

do_report()

void Slave_reporting_capability::do_report ( loglevel  level, int  err_code, const char *  msg, va_list  v_args  ) const

inlineprotectedvirtual

Reimplemented in Slave_worker.

get_for_channel_str()

virtual const char * Slave_reporting_capability::get_for_channel_str ( bool  upper_case ) const

pure virtual

Implemented in Master_info, Relay_log_info, and Slave_worker.

has_temporary_error()

int Slave_reporting_capability::has_temporary_error	(	THD *	thd,
		uint	error_arg = 0,
		bool *	silent = nullptr
	)		const

Check if the current error is of temporary nature or not.

Some error codes are always considered temporary in nature, such as ER_LOCK_DEADLOCK and ER_LOCK_WAIT_TIMEOUT.

It is also possible to signal that the error is temporary by pushing a warning with the error code ER_GET_TEMPORARY_ERRMSG or ER_REPLICA_SILENT_RETRY_TRANSACTION.

Parameters

	thd	Thread handle
	error_arg	The error code for assessment. Defaults to zero which makes the function check the top of the reported errors stack.
[out]	silent	Return value indicating whether the error should be silently handled.

Returns

1 as the positive and 0 as the negative verdict

is_error()

bool Slave_reporting_capability::is_error ( ) const

inline

last_error()

Error const & Slave_reporting_capability::last_error ( ) const

inline

operator=()

Slave_reporting_capability & Slave_reporting_capability::operator= ( const Slave_reporting_capability &  rhs )

private

report()

void Slave_reporting_capability::report ( loglevel  level, int  err_code, const char *  msg,   ...  ) const

virtual

Writes a message and, if it's an error message, to Last_Error (which will be displayed by SHOW SLAVE STATUS).

Parameters

level	The severity level
err_code	The error code
msg	The message (usually related to the error code, but can contain more information), in printf() format.

va_report()

void Slave_reporting_capability::va_report	(	loglevel	level,
		int	err_code,
		const char *	prefix_msg,
		const char *	msg,
		va_list	v_args
	)		const

Member Data Documentation

err_lock

mysql_mutex_t Slave_reporting_capability::err_lock

mutable

lock used to synchronize m_last_error on 'SHOW SLAVE STATUS'

m_last_error

Error Slave_reporting_capability::m_last_error

mutableprotected

Last error produced by the I/O or SQL thread respectively.

m_thread_name

char const* const Slave_reporting_capability::m_thread_name

private

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

• sql/rpl_reporting.h
• sql/rpl_reporting.cc