"brachie" wrote : I thought it would be a too tight dependency between the SFSB. For instance, if you inject SFSB A into SFSB B and SFSB C and change some business logic in A maybe B or C are broken because they use some methods of A. Umm. This is why you define an API? I think coupling that loosely is impossible (your components need to interact!). anonymous wrote : Ok, so I would have to inject the EntityHome into my SFSB implementing the use case? Yup. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4121753#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...