I'm trying to implement some kind of client notification or callback.

I have a set of EJB3 entity beans, a couple of session and message driven beans on my JBoss 4.0.3 RC2 server, and a Swing 1.5 client application that invokes methods on my session beans to manipulate the entities (add, remove, etc.). All it's working just fine.

Now, I want to implement a JList where I list all the instances of an entity, let's say Customer, i.e. I want to display a list of all the customer names in the database. I've implemented a custom ListModel that it's fetched by the Swing client from the server via a session bean method call. So far, so good! The problem is that this model contains all customer names that were in the database when the client app fetched the ListModel object from the server.

What I would like to have now is some mechanism to forward notifications of inserts, updates or deletes of customers on the database to the client application so that it can update its copy of the model and the associated JList component, i.e. I want the GUI to automatically display the name of a new customer, inserted in the database by some other client.

Does anyone have any idea on how to implement this, using EJB3 built-in features? (e.g. any annotation I can use to mark a method on a class as a remote callback!?)

I would like to avoid setting up any RMI communication or something like that, i.e. ideally I would like to use some sort of EJB3 or JBoss annotation!?

Thanks in advance for any thoughts!