Logger::LoggerAppenderQueue Class Reference

Implements queue serializing async appender events. More...

#include <Logger.qm.dox.h>

Inheritance diagram for Logger::LoggerAppenderQueue:

Public Member Methods
	process (timeout ms=0)
	Processes queued events. More...
bool	push (LoggerAppender appender, int type, auto params)
	Adds appender event. More...
int	size ()
	Returns the current number of events waiting in queue.

Private Member Methods
*hash< auto >	getEvent (timeout ms)
	Returns the next event from queue or NOTHING if there is no event available within the timeout period. More...

Detailed Description

Implements queue serializing async appender events.

All async events may be processed by one worker thread dedicated to one or more appenders so the thread posting logging event remains unblocked.

Member Function Documentation

getEvent()

*hash< auto > Logger::LoggerAppenderQueue::getEvent ( timeout  ms )

private

Returns the next event from queue or NOTHING if there is no event available within the timeout period.

Parameters

ms

a timeout value to wait for data to become available on the queue; integers are interpreted as milliseconds; relative date/time values are interpreted literally with a maximum resolution of milliseconds. A value that converts to integer 0 causes the call to time out immediately if the call would otherwise block. If a positive timeout argument is passed, and no data is available in the timeout period then waits up to timeout value, If a negative timeout value is passed as the argument, then the call blocks until data is available on the queue.

Returns

the next event from queue or NOTHING if there is no event available within the timeout period

process()

Logger::LoggerAppenderQueue::process

(

timeout

ms = 0

)

Processes queued events.

This method should typically be called in a dedicated thread

Parameters

ms

a timeout value to wait for data to become available on the queue; integers are interpreted as milliseconds; relative date/time values are interpreted literally with a maximum resolution of milliseconds. A value that converts to integer 0 causes the call to time out immediately if the call would otherwise block. If a positive timeout argument is passed, and no data is available in the timeout period then waits up to timeout value, If a negative timeout value is passed as the argument, then the call blocks until data is available on the queue. Default value is 0.

push()

bool Logger::LoggerAppenderQueue::push	(	LoggerAppender	appender,
		int	type,
		auto	params
	)

Adds appender event.

Parameters

appender	a logger appender object
type	see EVENT_xxx constants
params	data prepared by LoggerAppender::serializeImpl()

Returns

True if the event was succesfully added to queue