To ask technical questions or comment on the book, send email to bookquestions@oreilly. a web site for the book, where we'll list errata and any plans for future ditions. You can access this page at For more information about this book and others, see the O Reilly web site at http://www.oreilly.com/ The author maintains a web site for the discussion of ejb and related distributed computingtechnologies(http://www.ejbnow.com).EjbNow.coMprovidesnews about this book as well as code tips, articles, and an extensive list of links to EJB resources Acknowledgments While there is only one name on the cover of this book, the credit for development and delivery is shared by many individuals. Michael Loukides, my editor, was pivotal to the success of every edition of this book. Without his experience, craft, and guidance, this book would not have been possible Many expert technical reviewers helped ensure that the material was technically accurate and true to the spirit of Enterprise JavaBeans. Of special note are David Chappell of David Chappell Associates, Jim Farley, author of Java TM Distributed Computing(O'Reilly, 1998), Greg Nyberg of ObjectPartners, Prasad Muppirala and Shannon Pieper of BORN Information Services, contributed greatly to the technical accuracy of this book and brought a combination of industry and real-world experience to bear, helping to make this one of the best books on Enterprise Java Beans published today. Special thanks also go to Sriram Srinivasan of BEA, Anne Thomas of Sun MicrosystemsandlanmCcallionofIbmHursley,TimRohalyofjgUru.com, James D. Frentress of ITM Corp, Andrzej Jan Taramina of Accredo Systems Marc Loy, co-author of JavaTM Swing(O Reilly, 1998), Don Weiss of Step 1 Mike Slinn of The Dialog Corporation, and Kevin Dick of Kevin Dick Associates. The contributions of these technical experts were critical to the echnical and conceptual accuracy of earlier editions of this book. Others I would like to thank include Maggie Mezquita, Greg Hartzel, John Klug and Jon Jamsa of bORN Information who all suffered though the first draft of the first edition long ago to provide valuable feedback. Thanks also to Vlad Matena and Mark Hapner of Sun Microsystems, the primary architects of Enterprise JavaBeans; Linda DeMichiel, EJB 2.0 specification lead Copyright(c)2001 OReilly Associates 8DRAFT, 10/21/017/6/2001 Copyright (c) 2001 O'Reilly & Associates 8 info@oreilly.com To ask technical questions or comment on the book, send email to: bookquestions@oreilly.com We have a web site for the book, where we’ll list errata and any plans for future editions. You can access this page at: http://www.oreilly.com/catalog/entjbeans2/ For more information about this book and others, see the O’Reilly web site at: http://www.oreilly.com/ The author maintains a web site for the discussion of EJB and related distributed computing technologies (http://www.ejbnow.com). EJBNow.com provides news about this book as well as code tips, articles, and an extensive list of links to EJB resources. Acknowledgments While there is only one name on the cover of this book, the credit for its development and delivery is shared by many individuals. Michael Loukides, my editor, was pivotal to the success of every edition of this book. Without his experience, craft, and guidance, this book would not have been possible. Many expert technical reviewers helped ensure that the material was technically accurate and true to the spirit of Enterprise JavaBeans. Of special note are David Chappell of David Chappell & Associates, Jim Farley, author of Java™ Distributed Computing (O’Reilly, 1998), Greg Nyberg of ObjectPartners, Prasad Muppirala and Shannon Pieper of BORN Information Services, …………. They contributed greatly to the technical accuracy of this book and brought a combination of industry and real-world experience to bear, helping to make this one of the best books on Enterprise JavaBeans published today. Special thanks also go to Sriram Srinivasan of BEA, Anne Thomas of Sun Microsystems, and Ian McCallion of IBM Hursley, Tim Rohaly of jGuru.com, James D. Frentress of ITM Corp., Andrzej Jan Taramina of Accredo Systems, Marc Loy, co-author of Java™ Swing (O’Reilly, 1998), Don Weiss of Step 1, Mike Slinn of The Dialog Corporation, and Kevin Dick of Kevin Dick & Associates. The contributions of these technical experts were critical to the technical and conceptual accuracy of earlier editions of this book. Others I would like to thank include Maggie Mezquita, Greg Hartzel, John Klug and Jon Jamsa of BORN Information who all suffered though the first draft of the first edition so long ago to provide valuable feedback. Thanks also to Vlad Matena and Mark Hapner of Sun Microsystems, the primary architects of Enterprise JavaBeans; Linda DeMichiel, EJB 2.0 specification lead;