public class

NullAppender

extends AppenderSkeleton

java.lang.Object
↳	org.apache.log4j.AppenderSkeleton
	↳	org.apache.log4j.varia.NullAppender

Class Overview

A NullAppender merely exists, it never outputs a message to any device.

Inherited Fields

Public Constructors
	NullAppender()

Public Methods
void	activateOptions() There are no options to acticate.
void	close()
void	doAppend(LoggingEvent event) Does not do anything.
NullAppender	getInstance() This method is deprecated. Use getNullAppender instead. getInstance should have been static.
static NullAppender	getNullAppender() Whenever you can, use this method to retreive an instance instead of instantiating a new one with `new`.
boolean	requiresLayout() NullAppenders do not need a layout.

Protected Methods
void	append(LoggingEvent event) Does not do anything.

Inherited Methods

void	activateOptions() Derived appenders should override this method if option structure requires it.
void	addFilter(Filter newFilter) Add a filter to end of the filter list.
abstract void	append(LoggingEvent event) Subclasses of `AppenderSkeleton` should implement this method to perform actual logging.
void	clearFilters() Clear the filters chain.
synchronized void	doAppend(LoggingEvent event) This method performs threshold checks and invokes filters before delegating actual logging to the subclasses specific `append(LoggingEvent)` method.
void	finalize() Finalize this appender by calling the derived class' `close` method.
ErrorHandler	getErrorHandler() Return the currently set `ErrorHandler` for this Appender.
Filter	getFilter() Returns the head Filter.
final Filter	getFirstFilter() Return the first filter in the filter chain for this Appender.
Layout	getLayout() Returns the layout of this appender.
final String	getName() Returns the name of this appender.
Priority	getThreshold() Returns this appenders threshold level.
boolean	isAsSevereAsThreshold(Priority priority) Check whether the message level is below the appender's threshold.
synchronized void	setErrorHandler(ErrorHandler eh) Set the `ErrorHandler` for this Appender.
void	setLayout(Layout layout) Set the layout for this appender.
void	setName(String name) Set the name of this Appender.
void	setThreshold(Priority threshold) Set the threshold level.

From class java.lang.Object

abstract void	addFilter(Filter newFilter) Add a filter to the end of the filter list.
abstract void	clearFilters() Clear the list of filters by removing all the filters in it.
abstract void	close() Release any resources allocated within the appender such as file handles, network connections, etc.
abstract void	doAppend(LoggingEvent event) Log in `Appender` specific way.
abstract ErrorHandler	getErrorHandler() Returns the `ErrorHandler` for this appender.
abstract Filter	getFilter() Returns the head Filter.
abstract Layout	getLayout() Returns this appenders layout.
abstract String	getName() Get the name of this appender.
abstract boolean	requiresLayout() Configurators call this method to determine if the appender requires a layout.
abstract void	setErrorHandler(ErrorHandler errorHandler) Set the `ErrorHandler` for this appender.
abstract void	setLayout(Layout layout) Set the `Layout` for this appender.
abstract void	setName(String name) Set the name of this appender.

There are no options to acticate.

Does not do anything.

This method is deprecated.
Use getNullAppender instead. getInstance should have been static.

Whenever you can, use this method to retreive an instance instead of instantiating a new one with new.

Whenever you can, use this method to retreive an instance instead of instantiating a new one with new.