📄 mylogger.java
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/* * 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. <p>See <b><a href="doc-files/MyLogger.java">source code</a></b> for more details. <p>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#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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