Servlet and utility problem

Question

Can we Implement "observer" utility in a class extending "HttpServlet"???
I am giving a proposed code. Assume that all the packages has been imported. This code is giving run time error......
The Code follows Like :
class SomeServlet extends HttpServlets implements Observer
       public void Service(HttpServletRequest request, HttpServletResponse response)
                BeingWatched bw = new BeingWatched(this);
      update(Observable o, Object arg)
//Here is the code which is implementing Observable
public class BeingWatched extends Observable
     public BeingWatched(Observer o)
          addObserver(o);
          counter(10);
     void counter(int period)
          for(;period>=0;period--)
               setChanged();
               //notifyObservers();
               notifyObservers(new Integer(period));
               try
                    Thread.sleep(1000);
               catch(InterruptedException e)
                    System.out.println("sleep Interrupted");
     }

Answer 1

Hi sumitk,
Sorry for the delay in responding, I live down under so I'm in bed when everyone else is logged on.
You can implement Observer as you have done from a servlet, I think something in the way you have written the servlet is causing you threading problems. My knowledge is a bit vague but try this article from javaworld:
http://www.javaworld.com/javaworld/javatips/jw-javatip29.html?
Its seems pretty good.