title: Best way to integrate Vaadin 7 and EJB or how make service layer?
body: <p>what is the best way to integrate Vaadin 7 and EJB? Or how make service layer? I want use JPA to persist data. I'm thinking about this schema: Vaadin -> EJB(Service) -> JPA. Maybe you have better solution. By the way, in future I will add Web Services.</p>