Override of a log4j appender : where should I add the class in my Fuse ?

[vmahe]

Hello everyone,

I'm trying to override the MDCSiftingAppender which I find great except that I don't want any log whenever the MDC key is not found in the current thread context.

I have written the following Java code :

package com.orange.c4m.common.log;

import org.apache.log4j.sift.MDCSiftingAppender;

import org.apache.log4j.spi.LoggingEvent;

public class SiftingWhileRejectingDefaultAppender extends MDCSiftingAppender {

     @Override

     protected void append(LoggingEvent event) {

          Object value = event.getMDC(getKey());

          if (value != null) {

               super.append(event);

          }

          else

               System.out.println("SiftingWhileRejectingDefaultAppender : value is null !");

     }

}

But can you tell me how I deploy now this class so that I can use it in my org.ops4j.pax.logging.cfg file ?

Thanks

Regards,

Vincent

[ffang]

Hi,

Basically you need put your customer append into a fragment bundle and append the fragment bundle to org.ops4j.pax.logging.pax-logging-service(pax-logging-service play the role as a host bundle)

Take a look at to get more details, the "Using your own appenders" chapter

http://karaf.apache.org/manual/latest-2.2.x/users-guide/logging-system.html

Freeman

[vmahe]

Thank you freeman for this reply.

Could you send me some sample pom.xml Maven file which would enable me to generate this kind of bundle ?

Regards,

Vincent

[ffang]

Hi,

I don't have a complete one at hand, but the key point is add Fragment-Host for maven-bundle-plugin, something just like

$

and you can google to get more details.

Freeman