Acknowledgments Reviewers EJB Design Patterns could never have been completed without the reviews, suggestions,corrections,and even questions of all the members of TheServer- Side.com JEE Community who reviewed my work over a period of eight months: Alex Tyurin,Alex Wologodzew,Allan Schweitz,Alun R.Butler,Andre Cesta, Andre Winssen,Andreas Kruiger,Andy Stevens,Andy Turner,Ankur Kumar, Anthony Catalfano,Anuj Vohra,Anup Kumar Maliyackel,Aparna Walawalkar, Ashim Chakraborty,Babur Begg,Ben Beazley,Bill Ennis,Billy Newport Blasius Lofi Dewanto,Bob Lee,Boris Melamed,Botnen Trygve,Brian Benton, Brian Dobby,Brian Walsh,Brian Weith,Carmine Scotto d'Antuono,Cecile Saint-Martin,Chad Vawter,Chandra Mora,Charles N.May,Colin He Constantin Gonciulea,Cristina Belderrain,Curt Smith,Dan Bereczki,Dan Zainea,Daniel F.Burke,Daniel Massey,Darrow Kirkpatrick,Dave David Ziegler,Dimitri Rakitine Eduard Skhisov,Emmanuel Valentin,Engstrom Anders,Erez Nahir,Faisal aveed,Fernando Bellas Permuy,FM Spruzen Simon,Forslof Mats,Frank Robbins,Frank Sampson,Frank Stefan,Fried Hoeben,Gabriela Chiribau, Ganesh Ramani,Geert Mergan,Gene McKenna,Geoff Soutter,Gjino Bledar, Gunnar Eikman,Hai Hoang,Heng Ngee Mok,Hildebrando Arguello,Hossein S.Attar,Howard Katz,Huu-An Nguyen,Iain McCorquodale,J.D.Bertron, James Hicks,James Kelly,Janne Nykanen,Jean Safar,Jean-Pierre Belanger Jeff Anderson,Jerome Beau,Jesper Andersen,John Ipe,Jonathan Asbell,Jorg Winter,Joseph Sheinis,Juan-Francisco Borras-Correa,Julian Chee,Junaid Bhatra,Justin Leavesley,Justin Walsh,Ken Hoying,Ken Sizer,Krishnan Subramanian,Kristin Love,Kyle Brown,Lance Hankins,Larry Yang,Laura Fang,Laurent Rieu,Leo Shuster,MHeling,Madhu Gopinathan,Mark Buchner, Mark L.Stevens Martin cciarini,Matt Mikulic Mattias Fagerstrom Mohan Radhakrishnan,Mohit Sehgal,Muhammad Farhat Kaleem,Muller Laszlo,Murray Knox,Nakamura Tadashi,Nicholas Jackson,Nick Minutello, Nick Smith,Niklas Eriksson,Oliver Kamps,Olivier Brand,Partha Nages swaran Patrick Caulfield,Paul Wadmore,Paulo Ferreira de Moura Jr.,Paulo Merson, Peter Miller.Pontus Hellgren.Raffaele Spazzoli Rais Ahmed.Raiesh Jayaprakash,Reg Whitton,Richard Dedeyan,Rick Vogel,Robert Melntosh Robert Nicholson,Robert O'Leary,Roger Rhoades,Roman Stepanenko, Samuel Santiago,Sashi Guduri,Scot McPhee,Scott Chen,Scott Stirling,Scott W.Ambler,Sebastien Couturiaux,Sergey Oreshko,Shorn Tolley,Simon Brown,Simon Harris,Simone Milani,Stefan Piesche,Stefan Tilkov,Stephan J. Schmidt,Steve Divers,Steve Hill,Steven Sagaert,Sun-Lai Chang,Tarek Hammoud,Taylor Cowan,Terry Griffey,Thanh C.Bryan,Therese Hermansson, Thierry Janaudy,Thomas Bohn,Toby Reyelts,Tom Wood,Tracy Milburn,Reviewers EJB Design Patterns could never have been completed without the reviews, suggestions, corrections, and even questions of all the members of TheServer￾Side.com J2EE Community who reviewed my work over a period of eight months: Alex Tyurin, Alex Wologodzew, Allan Schweitz, Alun R. Butler, Andre Cesta, Andre Winssen, Andreas Krüger, Andy Stevens, Andy Turner, Ankur Kumar, Anthony Catalfano, Anuj Vohra, Anup Kumar Maliyackel, Aparna Walawalkar, Ashim Chakraborty, Babur Begg, Ben Beazley, Bill Ennis, Billy Newport, Blasius Lofi Dewanto, Bob Lee, Boris Melamed, Botnen Trygve, Brian Benton, Brian Dobby, Brian Walsh, Brian Weith, Carmine Scotto d’Antuono, Cecile Saint-Martin, Chad Vawter, Chandra Mora, Charles N. May, Colin He, Constantin Gonciulea, Cristina Belderrain, Curt Smith, Dan Bereczki, Dan Zainea, Daniel F. Burke, Daniel Massey, Darrow Kirkpatrick, Dave Churchville, David E. Jones, David Ezzio, David Ziegler, Dimitri Rakitine, Dimitrios Varsos, Dion Almaer, Doal Miller, Don Schaefer, Donnie Hale, Eduard Skhisov, Emmanuel Valentin, Engström Anders, Erez Nahir, Faisal , aveed, Fernando Bellas Permuy, FM Spruzen Simon, Forslöf Mats, Frank Robbins, Frank Sampson, Frank Stefan, Fried Hoeben, Gabriela Chiribau, Ganesh Ramani, Geert Mergan, Gene McKenna, Geoff Soutter, Gjino Bledar, Gunnar Eikman, Hai Hoang, Heng Ngee Mok, Hildebrando Arguello, Hossein S. Attar, Howard Katz, Huu-An Nguyen, Iain McCorquodale, J.D. Bertron, James Hicks, James Kelly, Janne Nykanen, Jean Safar, Jean-Pierre Belanger, Jeff Anderson, Jérôme Beau, Jesper Andersen, John Ipe, Jonathan Asbell, Jörg Winter, Joseph Sheinis, Juan-Francisco Borras-Correa, Julian Chee, Junaid Bhatra, Justin Leavesley, Justin Walsh, Ken Hoying, Ken Sizer, Krishnan Subramanian, Kristin Love, Kyle Brown, Lance Hankins, Larry Yang, Laura Fang, Laurent Rieu, Leo Shuster, M Heling, Madhu Gopinathan, Mark Buchner, Mark L. Stevens, Martin Squicciarini, Matt Mikulics, Mattias Fagerström, Mohan Radhakrishnan, Mohit Sehgal, Muhammad Farhat Kaleem, Muller Laszlo, Murray Knox, Nakamura Tadashi, Nicholas Jackson, Nick Minutello, Nick Smith, Niklas Eriksson, Oliver Kamps, Olivier Brand, Partha Nageswaran, Patrick Caulfield, Paul Wadmore, Paulo Ferreira de Moura Jr., Paulo Merson, Peter Miller, Pontus Hellgren, Raffaele Spazzoli, Rais Ahmed, Rajesh Jayaprakash, Reg Whitton, Richard Dedeyan, Rick Vogel, Robert McIntosh, Robert Nicholson, Robert O’Leary, Roger Rhoades, Roman Stepanenko, Samuel Santiago, Sashi Guduri, Scot McPhee, Scott Chen, Scott Stirling, Scott W. Ambler, Sébastien Couturiaux, Sergey Oreshko, Shorn Tolley, Simon Brown, Simon Harris, Simone Milani, Stefan Piesche, Stefan Tilkov, Stephan J. Schmidt, Steve Divers, Steve Hill, Steven Sagaert, Sun-Lai Chang, Tarek Hammoud, Taylor Cowan, Terry Griffey, Thanh C. Bryan, Therese Hermansson, Thierry Janaudy, Thomas Bohn, Toby Reyelts, Tom Wood, Tracy Milburn, xx Acknowledgments