In Detail The 3 EJB (Enterprise Java Beans version 3) specification is a core component of enterprise level Jee (Java Platform Enterprise Edition) implementations and this improved version is set to simplify development of Java Enterprise applications. This book covers the core elements of EJB 3 technology, exploring them in a concise with examples that support a lot. You will: Getting a quick introduction to three important EJB Entity principlesCreate while learning about the underlying, Message-Driven Beans, Session Beans and clientsLook them in running EJB client from the client application containerLearn how to package and distribute a JQPL EJBUse (Java Persistence Query Language) Explore the entity manager interfaceLearn about the object / relational mapping with EJB 3Look in Java Messaging API and message-driven beansLook on transactions, interceptors, and EJB timer servicesUnderstand how EJB 3 differs from the security features of EJB 3's versionImplement 2.x Approach This book is a quick tutorial that explores the key features of EJB 3 with many accompanying examples. This book is not a complete reference guide, but a brief exploration of the core elements of EJB 3's. Who is this book written for? This book is primarily intended for professional developers who already have knowledge of Java. As a new version of EJB is so very different from the previous version (EJB 2.x), this book is suitable for and should appeal to those who have experience working with EJB 2.x.