Log4j 1.3alpha0

org.apache.log4j.chainsaw.messages
Class MessageCenterAppender

java.lang.Object
  |
  +--org.apache.log4j.AppenderSkeleton
        |
        +--org.apache.log4j.chainsaw.messages.MessageCenterAppender
All Implemented Interfaces:
Appender, OptionHandler

public final class MessageCenterAppender
extends AppenderSkeleton

A very basic appender that takes the events and stores them in to a ListModel for late retrieval.

Author:
Paul Smith

Field Summary
 
Fields inherited from class org.apache.log4j.AppenderSkeleton
closed, errorHandler, headFilter, layout, name, tailFilter, threshold
 
Constructor Summary
MessageCenterAppender()
           
 
Method Summary
protected  void append(LoggingEvent event)
          Subclasses of AppenderSkeleton should implement this method to perform actual logging.
 void clearModel()
          Removes all the Events from the model
 void close()
          Release any resources allocated within the appender such as file handles, network connections, etc.
 javax.swing.ListModel getModel()
          Returns a reference to the ListModel that contains all the LoggingEvents that have been appended to this class.
 boolean requiresLayout()
          Configurators call this method to determine if the appender requires a layout.
 
Methods inherited from class org.apache.log4j.AppenderSkeleton
activateOptions, 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

MessageCenterAppender

public MessageCenterAppender()
Method Detail

getModel

public final javax.swing.ListModel getModel()
Returns a reference to the ListModel that contains all the LoggingEvents that have been appended to this class.

Returns:

append

protected 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

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.


requiresLayout

public boolean requiresLayout()
Description copied from interface: Appender
Configurators call this method to determine if the appender requires a layout. If this method returns true, meaning that layout is required, then the configurator will configure an layout using the configuration information at its disposal. If this method returns false, meaning that a layout is not required, then layout configuration will be skipped even if there is available layout configuration information at the disposal of the configurator..

In the rather exceptional case, where the appender implementation admits a layout but can also work without it, then the appender should return true.


clearModel

public void clearModel()
Removes all the Events from the model


Log4j 1.3alpha0

Copyright 2000-2003 Apache Software Foundation.