org.apache.log4j.chainsaw
Class ChainsawAppender

java.lang.Object
  org.apache.log4j.AppenderSkeleton
      org.apache.log4j.chainsaw.ChainsawAppender

All Implemented Interfaces:

org.apache.log4j.Appender, org.apache.log4j.spi.OptionHandler

public class ChainsawAppender
extends org.apache.log4j.AppenderSkeleton

ChainsawAppender receives LoggingEvents from the local Log4J environment, and appends them into a model that can be used inside a Swing GUI

Version:

1.0

Author:

Paul Smith

Field Summary

Fields inherited from class org.apache.log4j.AppenderSkeleton

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

Constructor Summary

ChainsawAppender()
Constructor, initialises the singleton instance of the appender

Method Summary

void	activateOptions() Instantiates and activates an instance of a ChainsawViewer to view the contents of this appender.
protected void	append(org.apache.log4j.spi.LoggingEvent aEvent) Appends the event
void	close() Close does nothing
org.apache.log4j.Appender	getAppender()
java.lang.String	getApplication() Returns value of the Application option.
java.lang.String	getViewerClass() Gets the viewer class to use to view the events.
boolean	requiresLayout() This appender does not require layout and so return false
void	setAppender(org.apache.log4j.Appender appender)
void	setApplication(java.lang.String lapp) The Application option takes a string value which should be the name of the application getting logged
void	setViewerClass(java.lang.String classname) Sets the viewer class to use to view the events.

Methods inherited from class org.apache.log4j.AppenderSkeleton

addFilter, clearFilters, doAppend, 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

Constructor Detail

ChainsawAppender

public ChainsawAppender()

Constructor, initialises the singleton instance of the appender

Method Detail

requiresLayout

public boolean requiresLayout()

This appender does not require layout and so return false

Returns:

false and only false

getAppender

public org.apache.log4j.Appender getAppender()

setAppender

public void setAppender(org.apache.log4j.Appender appender)

append

protected void append(org.apache.log4j.spi.LoggingEvent aEvent)

Appends the event

Specified by:

append in class org.apache.log4j.AppenderSkeleton

Parameters:

aEvent - the LoggingEvent to append

activateOptions

public void activateOptions()

Instantiates and activates an instance of a ChainsawViewer to view the contents of this appender.

Specified by:

activateOptions in interface org.apache.log4j.spi.OptionHandler

Overrides:

activateOptions in class org.apache.log4j.AppenderSkeleton

close

public void close()

Close does nothing

setViewerClass

public void setViewerClass(java.lang.String classname)

Sets the viewer class to use to view the events. The class must implement the ChainsawViewer interface.

Parameters:

classname - The class name of the viewer class.

getViewerClass

public java.lang.String getViewerClass()

Gets the viewer class to use to view the events.

Returns:

The class name of the viewer class.

setApplication

public void setApplication(java.lang.String lapp)

The Application option takes a string value which should be the name of the application getting logged

getApplication

public java.lang.String getApplication()

Returns value of the Application option.