This is a sample Maven Java EE ear/war/ejb project demonstrating dependency injection via annotations (e.g. @Stateless, @EJB) which can be overridden from XML deployment descriptors (e.g. ejb-jar.xml or application.xml).
As long as there is only a single implementation for a given bean interface, there is no problem at all. Once you add additional bean implementations you have to specify which implementation to use, otherwise the deployment will fail.
There are two use cases:
- All EJB implementations are in the same ejb module
- use the
ejb-jar.xmlin the ejb module to specify the bean implementation - working sample: browse sample-ejb-app@249cbe
- use the
- EJB implementations are spread across multiple ejb modules
- use the
application.xmlin the ear project to specify the bean implementation - working sample: browse sample-ejb-app@d6659a
- use the