Configuring a Java Application to log to TraceListener

Requirements

log4j version 2.0 (download it from here)

Application build requirements:

add a reference to the log4j.jar to your application

Application configuration

pogrammatic configuration:

import org.apache.log4j.*;
import org.apache.log4j.net.UDPAppender;
import org.apache.log4j.xml.XMLLayout;
...
public static void main(String[] args)
{
	// configure an UdpAppender with XML Layout
	xmll.setLocationInfo(true);
	// log to the local machine as a remotehost and on port 9991
	UDPAppender udpApp = new UDPAppender("localhost", 9991);
	XMLLayout xmll = new XMLLayout();
	xmll.SetLocationInfo(true);
	udpApp.setLayout(xmll);
	udpApp.setEncoding("default");
	BasicConfigurator.configure(udpApp);
	// log a debug string to TraceListener
	Logger.getLogger("MainForm").info("Hello from log4j.");
}

configuration through a XML configuration file:

import org.apache.log4j.*;
import org.apache.log4j.joran.JoranConfigurator;

public static void main(String[] args)
{
	JoranConfigurator jc = new JoranConfigurator();
	jc.doConfigure("c:/LogConfig.xml", LogManager.getLoggerRepository());
	Logger.getLogger("MainForm").info("Hello from log4j.");
}

XML configuration file:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration >
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
	<appender name="UDPAppender" class="org.apache.log4j.net.UDPAppender">
		<param name="RemoteHost" value="localhost"/>
		<param name="Port" value="9991"/>
		<param name="Encoding" value="default"/>
		<layout class="org.apache.log4j.xml.XMLLayout">
			<param name="LocationInfo" value="true"/>
		</layout>
	</appender>
	<root>
		<appender-ref ref="UDPAppender" />
	</root>
</log4j:configuration>