Home Tutorials Log4j Use of BasicConfigurator in Log4j logging
Questions:Ask|Latest


 
 

Share on Google+Share on Google+

Use of BasicConfigurator in Log4j logging

Advertisement
If you are getting foregoing log4j warn debug info, that means you have not initialized log4j properly. So In this part of tutorial we will tell you how to configure log4j using BasicConfigurator.

Use of BasicConfigurator in Log4j logging

     

log4j warning

log4j: WARN No appenders could be found for logger (org.activemq.transport.tcp.TcpTransportChannel).
log4j: WARN Please initialize the log4j system properly.

If  you are getting foregoing log4j warn debug info, that means you have not initialized log4j properly. So
In this part of tutorial we will tell you how to configure log4j using BasicConfigurator.

Now lets see when this log4j warning occurs. We are creating only SimpleLog file without configuring it as:

 

 

 

 

 

import org.apache.log4j.*;
public class SimpleLog {
  static Logger logger = Logger.getLogger("SimpleLog.class");
  public static void main(String[] args) {
  logger.debug("Hello world.");  
  }
}

After running the example we have got following log4j warning flashing on command prompt:

log4j:WARN No appenders could be found for logger (SimpleLog.class).
log4j:WARN Please initialize the log4j system properly.

It is because we don't have configured Log4j. There are many different ways of configuring Log4j. One way is through BasicConfigurator. This can be done as follows:

import org.apache.log4j.*;
import org.apache.log4j.BasicConfigurator;
public class SimpleLog {
  static Logger logger = Logger.getLogger("SimpleLog.class");
  public static void main(String[] args) {
  BasicConfigurator.configure();
  logger.debug("Hello world.");  
  }
}

Now after running this code you will get the following output on your console:

Output:

0 [main] DEBUG SimpleLog.class - Hello world.

where "0" shows time taken in milliseconds from start of program to the logging request. "Hello world" is the message that we have given.
SimpleLog.class is the logger name and in bracket [main] is the thread who have invoked logging.

Download Source Code

     

Advertisements

Liked it!  Share this Tutorial


Follow us on Twitter, or add us on Facebook or Google Plus to keep you updated with the recent trends of Java and other open source platforms.

Posted on: September 10, 2008

Ask Questions?    Discuss: Use of BasicConfigurator in Log4j logging  

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments
DMCA.com