Understanding MDC

[jay andrews <ja...@hotmail.com>]

Hello,
I am just beginning to use log4j and I am trying to get my head around using 
the MDC class.  From reading through the archives it appears that I need to 
use this class for my logging within my servlet.  That being said, I'm 
having a little understanding exactly how its used.  Is it as simple as the 
following or is there more to it?  Can someone please shed some light?

Thanks.


MyServlet extends HttpServlet {

  public void doPost {

    MDC.put("ipAddress", ipAddress);
    logger.info("my event.");

    // code

    logger.info("my event2.");

  }

}

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