How to pass back object to client?

Question

Forgive me if i ask too stupid question, but I really confuse what is really happen when it is not working.
Firstly, client A pass several objects to the server one by one, and the server will have to wait untill another client (let call it client b) able to process this object, and pass it back to the client a.
This object include some data that need to compute and save the result back to the object.
In this case, I have write the code to enable the server to callback client a, when the object is processed. Rather then put it in a while loop to wait the result coming back.
But I have difficult to trace back the original client. It cannot find client A and update the object.
I already read the Stock, Time example (which is in Sun website), and follow it to develop my program, but I still cannot get it right.
Does anyone know have any reference that I can look at or give some suggestion that can help.
Thank in advance and wish you have a good day.
Regards,
Tai Tan

Answer 1

Really thank you for your help.
But i still unable to get it right.
Can I ask you few more questions. thank.
Can I know what the 'this' in the your example mean?
try
   UnicastRemoteObject.exportObject( this );  //what is 'this' mean?
   obj = (Hello)Naming.lookup("//" + ser + ":5000/Server");
   message = obj.sayHello( this );  //what is 'this' mean?
catch (Exception e)
     System.out.println("HelloApplet exception: " +
      e.getMessage());
     e.printStackTrace();
}because the client program is not extends Applet, so if i put 'this' in the above 2 lines, it will not accept by the compiler.
one more question, I put the client class in the first 'this' means:
UnicastRemoteObject.exportObject( jobClient jc );  and passing second object in the second 'this':
//message = obj.sayHello( this );
mytemp.submitJob(jb1);
// Note: mytemp is : 'static mainServer mytemp';
// which is a remote object of the serverSo, is this the correct way to export the stub and object?
(In the example that you give, the 'this' is the same. But in my program, the second 'this', I have to call submitJob(jb1) in the server, and passing the jb1 ( is a serialize object name call jobThread.)
Thank again and sorry for giving you such trouble.