Enthuware Web Container Model Question

[Isha Garg]

Consider the code for doGet method of a servlet.

public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException
{
  String userId = null;
  try
  {
    userId = loginUser(req);
  }
  catch(Exception e)
  {
     // 1    :  log "Unknown User" and the exception to the log file.
  }
  if(userId != null)
  {
    //do something.
  }
}

Which of the given LOCs can be inserted at //1 to log the message as well as the exception's stack trace?
1. req.log(e, "Unknown User");
2.req.log(e, "Unknown User");
3.this.getServletContext().log("Unknown User",e);
4.this.getServletContext().log(e, "Unknown User");
5.The stack trace of the exception cannot be logged using log(...) methods.

Correct answer is 3.
But I say it should also be 4.
As, in ServletContext we have message log(Exception e,String message)

[Christophe Verré]

It's deprecated. You shouldn't use it. The API clearly states that you should "use log(String message, Throwable throwable) instead.".

[Isha Garg]

Ok.. Thanks for your reply.