Written By : Amit
Title :
Different logging files Log4j

Description :
configuration time using Log4j
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Written By : Amit
Title :
How to use Log4j

Description :
PatternLayout
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Written By : Amit
Title :
Using NDC and Log4j

Description :
NDC Push with Log4j
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Written By : Amit
Title :
Log4j Example

Description :
Log4j Tutorial
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Written By : guddu
Title :
Apache Commons Logging

Description :
with Log4j Example
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Written By : ISHTEK
Title :
Log4j Example Configuration

Description :
Applying Levels Logger
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Replied By ->
Girish

Is it required to have two Loggers for this purpose?
Can we have two appenders and call these appenders as per
requirement?

Commented By ->
siva krishna k

Hi
   
  This is my log4j.xml file but it is not creating file and i m running this in tomcat server. 
I couln't find what's the probelm?In tomcat log files i have seen this.

/*log4j:WARN No appenders could be found for logger (org.apache.commons.digester.Digester.sax).
log4j:WARN Please initialize the log4j system properly.*/

How to solve this problem?

 I am configuring xml file using DOMConfigurator class in java. This is my java code.
I m importing this package into one jsp page and there i m sending request.
pls send me response. I need it urgent

package logapi;

import org.apache.log4j.*;
import org.apache.log4j.xml.DOMConfigurator;

public class LOGAPI 
{
	static Logger logger = null;
	
	static 
	{
		logger = Logger.getLogger(LOGAPI.class);
	}
	public void LOGAPI()
	{
		DOMConfigurator.configure("log4j.xml");
	}
	
	public void debug(Object o)
	{
		try
		{
			debug(o);	
		}
		catch (Exception e)
		{
			logger.debug("Debugging:",e);
		}
		
	}
	public void info(Object o)
	{
		try
		{
			info(o);	
		}
		catch (Exception e)
		{
			logger.info("Info:",e);
		}
	}
	public void warn(Object o)
	{
		try
		{
			warn(o);	
		}
		catch (Exception e)
		{
			logger.warn("Warn:",e);
		}
	}
	public void error(Object o)
	{
		try
		{
			error(o);	
		}
		catch (Exception e)
		{
			logger.error("Error:");
		}
	}
	public void fatal(Object o)
	{
		try
		{
			fatal(o);	
		}
		catch (Exception e)
		{
			logger.fatal("Fatal",e);
		}
	}

}

LOG4J.XML

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="true"
xmlns:log4j='http://jakarta.apache.org/log4j/'>

<appender name="xmltest" class="org.apache.log4j.RollingFileAppender">
	<param name="File" value="c:/newlog.log"/>
	<param name="MaxFileSize" value="10MB"/>
	<param name="MaxBackupIndex" value="3"/>
	<param name="Append" value="true"/>
	<layout class="org.apache.log4j.PatternLayout">
		<param name="ConversionPattern" value="%d{ISO8601} [%c] - %m%n"/>
	</layout>
</appender>

<root>
	<appender-ref ref="xmltest"/>
</root>

</log4j:configuration>

Commented By ->
Amit

I guess, you might have not placed log4j.xml file inside WEB-INF/classes
folder. As I have written a simple test client Java file to test 
your log4j.xml and LOGAPI file, and it is working fine provided I place
your log4j.xml file in the same folder in which I am executing this test
client (as shown below).

TestLOGAPI.java
import org.apache.log4j.*;
public class TestLOGAPI
{
	Logger logger = LOGAPI.logger;
	public TestLOGAPI() {
		test();
	}
	public void test() {
        logger.debug("inside test method....");
	}
	public static void main(String[] args) 
	{
        new TestLOGAPI();
	}
}


Hope this helps.
Please let us know if this example way it works.

Commented By ->
arun

i new to write log4j ?
how to write seperate files information regards 
to debug,error or info 

thanks in advance

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