Question: How do you design an application that can be released multiple times on the same JBoss instance?

I am planning on creating a website and ejbs for a web application. This application will have different customers that need their own instance of the application. All the code will remain the same, but will access a different Dataset/Database.

I understand context in the Servlet Engine architecture, but how do you move that concept into EJBs? I have programmed a site not using EJBs, and all I needed to do is change 3 configurations: DB Info, Logging Info, and a Directory. I was then able to run on the same server under different contexts.

I was using a home grown framework that was doing a lot of what Application servers do, so I figured it would be best to switch over to a more Standards compliant environment.

I have thought of a couple ways to get the job done, but I will not explain them now, because I have a feeling that it will limit the discussion rather than promoting new ideas. I will gladly explain my ideas at a later point, or when asked.

I assume that there will be questions, so I will be available to answer any questions.

Thanks,
Jeffrey