Targeted at Java and J2EE developers both with and without prior EJB experience, Beginning EJB 3 Application Development takes readers through the details of the EJB 3.0 architecture, and shows how EJB can be used to develop a strong, based backend business logic-standard. With 12 years of combined EJB experience, the author offers practical insight into the entire EJB architecture and covers all areas of the EJB 3.0 specification, including Complete exploration of all types of beans, from session beans to message-driven beans and entity beans A look far on the persistence mechanism for EJB 3 new and object-relational mapping integration test client application inside and outside the application EJB container Comprehensive sample with integrated EJB components Upgrade headachescommon problems encountered when migrating from EJB 2.1 for EJB 3.0 With Java and SQL under your belt, this book will teach you EJB 3 from bottom to top. And it covers upgrade issues that youll meeting when migrating from EJB 2.1 for EJB 3.0, so it is irrelevant if you're already EJB developers.