How to send message to client?

Question

Hello, I'm newbie in J2EE. I have a client (e.g. GUI class) which have to "connect" to EJB and start further processing when others 3 clients also connect to this EJB. It's not a problem to obtain reference to EJB and connect to it, but I don't know how to send some message from EJB to client.
I've tried to implement it with events, but it not works. Is it possible to use event for this? Are there any patterns to solve this class of problems? Please, help!
Below fragments of my code for events:
GamesListFrame.java
      try
         title.setText("text");
         tablesManager = getHome().create();
         tablesManager.addStartGameListener(this);
         tablesManager.generateEvent();
      } catch ...
}and TablesManagerBean.java
    * @ejb.interface-method
    *     view-type="remote"
   public void generateEvent()
      EventQueue q = Toolkit.getDefaultToolkit().getSystemEventQueue();
      StartGameEvent event = new StartGameEvent(this);
      q.postEvent(event);     
    * @ejb.interface-method
    *     view-type="remote"
   public void addStartGameListener(StartGameListener listener)
      listenerList.add(StartGameListener.class, listener);
   public void processEvent(AWTEvent event)
      if (event instanceof StartGameEvent)
         EventListener[] listeners = listenerList.getListeners(StartGameListener.class);
         for (int i=0; i<listeners.length; i++)
            ((StartGameListener)listeners).GameStarted((StartGameEvent)event);
else
super.processEvent(event);

Answer 1

Before you make any call form client to server check that sever is available. This is easily done by intorudciing an rmi method that will return true e.g m_sever.isAvalable(); if server is availbel you will get ture if not then you will get an RMI Excpetion which you then trap and attemp to reconnect to the server (NAming.lookup() ) .. if several attempts fail then assume server is down.
When a client dies it throws an excpetion on the sErver :
java.net.SocketException: Connection reset by peer: JVM_recv in socket input stream read
     at java.net.SocketInputStream.socketRead0(Native Method)
     at java.net.SocketInputStream.read(SocketInputStream.java:116)
     at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
     at java.io.FilterInputStream.read(FilterInputStream.java:66)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:442)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
     at java.lang.Thread.run(Thread.java:536)
trap this and deal with it appropriatly.
hope this helps.
Charbel.