"epbernard" wrote : | Even if we define a proprietary abstraction implemented by JBoss AS and passed as an argument to createContainerEntityManagerFactory (in the Map), it does not solves the whole problem. | JBoss AS has to conform to the PersistenceUnitInfo contract so that other providers can bootstrap :) I'm not saying don't support the spec. I'm saying we can optimize it. There are really two seperate issues: 1) The embedded stuff where we don't require a packaging step to run tests, we create a VFS context that collects the disparate resources from across the IDE project. A sort of in memory symbolic link. See the VFSTestCase in the embedded project. 2) Optimizing the scanning/parsing of the class files for annotations. Scanning we can trim the list the list to speed things up since we already did the scan and know which are @Entity. And we've already parse those classes that do match. The issue that started this thread was (1). (2) is a nice to have. At the moment we have EJB3, Hibernate, Tomcat, AOP and in the future the MC all needing to scan packages for annotated classes. Doing it N times for N different modules is just a waste. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4109027#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...