EJB 3.0 is a radical departure from previous releases and has virtually been rewritten, so even the most experienced developers will need to relearn how to best use EJB with open source technologiesThis new edition continues the tradition of the first three bestselling editions of Mastering Enterprise JavaBeans and is packed with more than 50 percent new and revised material, four new chapters, and one new appendixExplores the two key changes to the fundamental shift in architecture to a simpler, easier-to-use POJO (Plain Old Java Object) model and the use of a metadata rather than deployment descriptorsDiscusses how EJB 3.0 will be a part of the J2EE 5.0 platform, forcing developers to relearn how to use EJB to develop mission-critical applicationsPublishing day and date with the first EJB-3-compliant servers