Includes material more than 30 percent revised and five new chapters, which include 2.1 new features such as EJB Timer Service and JMS as well as the latest open source Java solutions This book was developed as part of TheServerSide.com online EJB community, ensuring the built-in audience Indicates how to build an EJB system, program with EJB, adopt best practices, and utilizing advanced EJB concepts and techniques, including transactions, persistence, clustering, integration, and performance optimization offering practical guidance on when not using EJB and how to use a simpler, more low-cost open source technology in place of or in connection with the EJB