The web layer uses Struts with Action classes passing data to a model layer using a persistance frameworks based on the Data Access Object design pattern. Right now, I have designed my webapp to use XML persistance, but the frameworks I created accomodates the plugging in of alternate persistance mechanisms (JDBC, JDO, CMP, etc). I started with basic SAX, but remembered that you (Jason) had talked about using JDOM for persistance, so I have started moving in that direction.

I'd like to find a painless (or not too painful) way to get Collections of Value Objects (users, meetings, attendees, etc) into XML and back again using JDOM. Jason, it seems to me that your survey webapp also has similar requirements? It would be nice if we could come up with something we both can use.

I also have created a base class that handles logging (log4J, with the ability to plug in other loggers via the Jakarta-Commons- Logging package). My vision is to have a series of pluggable APIs that we all can reuse.

Here is a class diagram