I need to write a small j2ee application that I can deploy on jboss, weblogic and websphere. This application needs to run alongside customer's any other application already running on the application server.
My application will have a need to persist some simple data. I am looking for suggestions on which technologies I can use to persist my data in a portable way or at least in a way that requires minimum changes to customer's application server... something that I can just drop and deploy on a running server:
- using flat files... but its against j2ee specs - using hibernate - using entity beans