I’ve found in our office material from SUN course called The Business Component Development with EJB Technology, Java EE 5 (SL-351-EE5). After quick preview I know there is auction application implemented as a tutorial and there is whole business use cases description and UML: domain objects, persistence diagrams and implementation model. I am familiar with this world. I’ve seen much of this on SL-310-EE6, I’ve also have been on course for enterprise application architects but still I might discover something new in this materials :)