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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. 


The example should make it clear that subclasses follow the hierarchy. You should also try running this example with a bad and good configuration file samples.

See source code for more details. */ public class MyLoggerTest { /** When called wihtout arguments, this program will just print

       DEBUG [main] - Hello world.
and exit. However, it can be called with a configuration file in XML or properties format. */ static public void main(String[] args) { if(args.length == 0) { // Note that the appender is added to root but that the log // request is made to an instance of MyLogger. The output still // goes to System.out. Logger root = Logger.getRootLogger(); Layout layout = new PatternLayout("%p [%t] %c (%F:%L) - %m%n"); root.addAppender(new ConsoleAppender(layout, ConsoleAppender.SYSTEM_OUT)); } else if(args.length == 1) { if(args[0].endsWith("xml")) { DOMConfigurator.configure(args[0]); } else { PropertyConfigurator.configure(args[0]); } } else { usage("Incorrect number of parameters."); } try { MyLogger c = (MyLogger) MyLogger.getInstance(""); c.trace("Hello"); c.debug("Hello"); } catch(ClassCastException e) { LogLog.error("Did you forget to set the factory in the config file?", e); } } static void usage(String errMsg) { System.err.println(errMsg); System.err.println("\nUsage: "+MyLogger.class.getName() + "[configFile]\n" + " where *configFile* is an optional configuration file, "+ "either in properties or XML format."); System.exit(1); } }
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