org.apache.log4j.performance

Class NullAppender

java.lang.Object

org.apache.log4j.AppenderSkeleton

org.apache.log4j.performance.NullAppender

All Implemented Interfaces:

Appender, OptionHandler

public class NullAppender
extends AppenderSkeleton

A bogus appender which calls the format method of its layout object but does not write the result anywhere.

The org.apache.log4j.performance.NullAppender class is intended for internal use only. Consequently, it is not included in the log4j.jar file.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	s
java.lang.String	t

Fields inherited from class org.apache.log4j.AppenderSkeleton

closed, errorHandler, headFilter, layout, name, tailFilter, threshold

Constructor Summary

Constructors

Constructor and Description
NullAppender()
NullAppender(Layout layout)

Method Summary

Methods

Modifier and Type	Method and Description
void	append(LoggingEvent event) Subclasses of AppenderSkeleton should implement this method to perform actual logging.
void	close() Release any resources allocated within the appender such as file handles, network connections, etc.
void	doAppend(LoggingEvent event) This method performs threshold checks and invokes filters before delegating actual logging to the subclasses specific AppenderSkeleton.append(org.apache.log4j.spi.LoggingEvent) method.
boolean	requiresLayout() This is a bogus appender but it still uses a layout.

Methods inherited from class org.apache.log4j.AppenderSkeleton

activateOptions, addFilter, clearFilters, finalize, getErrorHandler, getFilter, getFirstFilter, getLayout, getName, getThreshold, isAsSevereAsThreshold, setErrorHandler, setLayout, setName, setThreshold

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

s

public static java.lang.String s

t

public java.lang.String t

Constructor Detail

NullAppender

public NullAppender()

NullAppender

public NullAppender(Layout layout)

Method Detail

close

public void close()

Description copied from interface: Appender

Release any resources allocated within the appender such as file handles, network connections, etc.

It is a programming error to append to a closed appender.

doAppend

public void doAppend(LoggingEvent event)

Description copied from class: AppenderSkeleton

This method performs threshold checks and invokes filters before delegating actual logging to the subclasses specific AppenderSkeleton.append(org.apache.log4j.spi.LoggingEvent) method.

Specified by:

doAppend in interface Appender

Overrides:

doAppend in class AppenderSkeleton

append

public void append(LoggingEvent event)

Description copied from class: AppenderSkeleton

Subclasses of AppenderSkeleton should implement this method to perform actual logging. See also AppenderSkeleton.doAppend method.

Specified by:

append in class AppenderSkeleton

requiresLayout

public boolean requiresLayout()

This is a bogus appender but it still uses a layout.