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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 * Copyright (C) The Apache Software Foundation. All rights reserved.
 * This software is published under the terms of the Apache Software
 * License version 1.1, a copy of which has been included with this
 * distribution in the LICENSE.txt file.  */

package examples.subclass;

import org.apache.log4j.*;
import org.apache.log4j.spi.LoggerFactory;
import org.apache.log4j.xml.DOMConfigurator;
import examples.customLevel.XLevel;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.helpers.LogLog;

   A simple example showing logger subclassing. 


See source code for more details.

See {@link MyLoggerTest} for a usage example. */ public class MyLogger extends Logger { // It's usually a good idea to add a dot suffix to the fully // qualified class name. This makes caller localization to work // properly even from classes that have almost the same fully // qualified class name as MyLogger, e.g. MyLoggerTest. static String FQCN = MyLogger.class.getName() + "."; // It's enough to instantiate a factory once and for all. private static MyLoggerFactory myFactory = new MyLoggerFactory(); /** Just calls the parent constuctor. */ public MyLogger(String name) { super(name); } /** Overrides the standard debug method by appending " world" at the end of each message. */ public void debug(Object message) { super.log(FQCN, Level.DEBUG, message + " world.", null); } /** This method overrides {@link Logger#getInstance} by supplying its own factory type as a parameter. */ public static Category getInstance(String name) { return Logger.getLogger(name, myFactory); } /** This method overrides {@link Logger#getLogger} by supplying its own factory type as a parameter. */ public static Logger getLogger(String name) { return Logger.getLogger(name, myFactory); } public void trace(Object message) { super.log(FQCN, XLevel.TRACE, message, null); } }

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