Addison wesley enterprise java programming with IBM websphere 2nd edition dec 2003 ISBN 032118579x

Enterprise Java Programming with IBM WebSphere, Second Edition Brown, Craig, Hester, Stinehour, Pitt, Weitzel, Amsden, Jakab, and Berg... When the first edition came out, it was easy to

Russell Stinehour, W David Pitt, Mark

Weitzel, Jim Amsden, Peter M Jakab, Daniel

environmentsandsystematic guidance for delivering systems of exceptional performance, robustness, and businessvalue.

Coverage includes

Sum Practical introductions to J2EE, WebSphere Application Server 5.0, and Web application

Sum In-depth insight into EJB architecture,

including transactions, security, and advanced

Sum Web services: examples and best practices leveraging WebSphere Application Server 5.x's latest enhancements

• Table of Contents

• Examples

Enterprise Java™ Programming with IBM® WebSphere®, Second Edition

By

Kyle Brown, Gary Craig, Greg Hester, Russell Stinehour, W David Pitt, Mark Weitzel, Jim Amsden, Peter M Jakab, Daniel Berg

Chapter 5.

Section 8.1.

Edit the Web Deployment Descriptor

Section 8.2.

Summary

Chapter 9.

Chapter 13.

Chapter 14.

XML/XSL Web Interfaces in WSAD

Section 15.1.

Strategy for Using XML/XSL for Web Interfaces Section 15.2.

Example XML/XSL Web Interface with WSAD

Chapter 20.

Simple CMP Entity Beans

Section 24.5.

Summary

Chapter 25.

Introduction to Message-Driven Beans

Participating in a Transaction

Implementing the Case Study User Interface Section 31.1.

User's Guide

Section 31.2.

Summary

Chapter 32.

Constructing J2EE Web Services for WebSphere

Section 33.1.

Getting Started with Web Services

Section 33.2.

Building Web Service Clients

Section 33.3.

Summary

Chapter 34.

Summary

Bibliography

LICENSE AGREEMENT AND LIMITED WARRANTY

About the CD-ROMs

Index

© Copyright International Business Machines Corporation 2003 All

rights reserved.

Note to U S Government UsersDocumentation related to restrictedrightsUse, duplication, or disclosure is subject to restrictions set forth inGSA ADP Schedule Contract with IBM Corp

Many of the designations used by manufacturers and sellers to

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assume no responsibility for errors or omissions No liability is assumedfor incidental or consequential damages in connection with or arising out

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IBM and WebSphere are trademarks of IBM Corporation in the UnitedStates, other countries, or both

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in a retrieval system, or transmitted, in any form, or by any means,

electronic, mechanical, photocopying, recording, or otherwise, without theprior consent of the publisher Printed in the United States of America.Published simultaneously in Canada

Gary CraigTo my wife Judy, and my three terrific children, Andrew,

Greg HesterI would like to thank my wife, Sherry, and my four children

for their patience while I worked on this book Without their love and

support, this book would not have been possible I'd also like to thankGod for the many blessings and opportunities

Russell StinehourI would like to thank my wife, Lee Ann, and my

children for their patience while I missed family functions to work on thisbook Lee Ann is a patient saint and a real asset in editing my work Iwould also like to thank Greg Hester and David Pitt for their support to

me personally It's nice to be able to work with your friends on a dailybasis I thank God for blessing me to be able to work on this book and forCrossLogic

W David PittTo my daughter Lauren for her enthusiasm in pointing out

our first edition in retail bookshelves

Mark WeitzelThis book is dedicated to Marialana, for her support,

encouragement, and Loveand for Big Sky And to Montana and Reece,for their patience and understanding when this work had to come first Ialso owe special thanks to Kyle Brown and Steve Graham for their adviceand friendship

Jim AmsdenI'd like to thank my wife Marjorie, and son Carl for their

support in this endeavor, and for their continued patience during the nextone I'd also like to thank Kyle for the wonderful opportunity to participatewith such a great team of co-authors

Peter M JakabTo my wife Mabel, my daughter Jessie and my son

Justin Without their support and encouragement this book would nothave been written And lastly, to Shadow, our black lab, who always kept

me company during the long days and nights writing this book

Daniel BergI would like to dedicate this book to my lovely wife Michelle.

She has selflessly supported me in this endeavor For this I have to saythank you and I love you I would also like to dedicate this book to my

it possible to create an amazing J2EE development tool in WebSphereStudio

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Enterprise Java Programming with IBM WebSphere, Second Edition

Brown, Craig, Hester, Stinehour, Pitt, Weitzel, Amsden, Jakab, and Berg

I don't often find books like this one terribly interesting Books on a

specific technology, such as WebSphere, are often handy if you're usingthat technologybut they don't contain any great insights I look to thesebooks to tell me exactly which animal I need to sacrifice with which

incense in order to get a job done And this book does tell you that forthese tools

What makes this book stand out is that it doesn't stop at that As the oldadage says, a fool with a tool is still a fool If you're developing enterpriseapplications with a technology like J2EE, it's easy to be a fool There arelots of ways you can mess things up, and all the wizards and cute

graphical interfaces in the world can't save you!

So this book also tells you how to reduce your foolishness by passing ondesign advice The authors have been building these kinds of

applications since before Java was invented Kyle Brown, in particular,has more than once steered me around a nasty distributed rock So here,you don't just find chapters on how to build a servlet, and what the

transaction attributes are for Enterprise JavaBeansthey actually give yousome advice on how to design these things Rather than just give a

offs you'll need to make in putting an Enterprise Java application

simple solution, suitable for a hands-on tutorial, they talk about the trade-together As a result, you may find some of this book hard work, but byputting the effort in to understanding it you'll avoid many of the pitfalls thatregularly send these kinds of projects to the great cubicle farm in the sky

In particular, the authors put a strong emphasis on layeringcentering theirdesign around a five-layer architecture While carefully separating layersare an odd complexity for simple examples, they are a key life vest forserious enterprise applications Time and time again, I've seen teamsbegin by reluctantly following layers, shrinking from the fact that simplelogic gets separated into several different classes Then slowly, they

appreciate that the layers allow changes to be made more easily, thatlayers make a system easier to test and easier to root out bugs If there is

architecture, even if it seems awkward to you You future self will thankyou for it

When the first edition came out, it was easy to find books on J2EE

technology but impossible to find any books giving good design advice.Indeed this was the first book that contained substantial design advice onJ2EE and as such influenced many writers of enterprise design booksitcertainly was very useful for me

The second edition builds on this by building its design advice on thework that has appeared since the first edition was published It spends alot of time showing you how to take some of the common enterprise

application patterns and implement them in J2EE As such it both

integrates and extends the work of authors like myself, and lays out morefoundations for our future work

So if you're a WebSphere developer, buy this book for its tutorial on

WebSphere, but treasure it for its design advice If you don't develop inWebSphere, or even J2EE, get this book for its design advice anyway

Martin Fowler

Chief Scientist, Thoughtworks

The first edition of Enterprise Java Programming with IBM WebSphere

was the first book that addressed J2EE development within the context of

an application server and Integrated Development Environment Thefeedback about the first edition was very positive, and led us to concludethat we had made the right choicethat developers usually learn J2EEtechnologies and the details of an application server together and that asingle book that teaches both is valuable

Since we published the first edition, a lot has changed When we wrotethe first edition, we couldn't use J2EE in the title because IBM was notyet a licensee of the newly developed J2EE brand, even though

WebSphere Application Server implemented all of the technologies in thenascent J2EE 1.0 specification Also, when we wrote the first edition,IBM's premier development environment for WebSphere was VisualAgefor Java; that environment has since been superseded by WebSphereStudio Application Developer

In this edition we will build on the firm foundation laid in the first edition,and expand the coverage of topics to include all of the major parts ofWebSphere Application Server 5.02 and WebSphere Studio ApplicationDeveloper 5.0 Those who have read the first edition will find a lot that isnew; new readers can be assured that we've built on a strong foundation

of describing the more mature parts of J2EE, while also describing newtechnologies like Web services and the EJB 2.0 specification

OO languages and programming environments While the details of thesystems that we have worked on have differed, they all shared somecommon features What we hope to do is to introduce J2EE, WebSphere,and WebSphere Studio by referring you to the things you already know,while showing you some best practices that we've learned in buildingclient/server and enterprise systems both before the age of Java and inthe J2EE universe.

We set forward to achieve several goals in the writing of this book Theyare to:

Introduce developers to the primary J2EE technologies

Teach developers how to apply these technologies within the rightarchitectural framework

Demonstrate how WebSphere Application Server implements theJ2EE standard, and what advantages it gives to developers as aJ2EE application server

Demonstrate the advantages WebSphere Studio Application

Developer conveys as a platform for developing J2EE programs fordeployment on WebSphere Application Server

Of these four goals, the most important one is listed second: to teachdevelopers how to apply J2EE technologies within the right architecturalcontext It has been our experience that teaching someone a new

technology without teaching how to apply it is a terrible mistake A lot ofour time as consultants is spent getting customers out of problems thathave been created either by trying to make a technology do something itwas not intended to do or by viewing one particular technology as ahammer and all problems as nails

While we can convey some of this architectural context by teaching youthe dos and don'ts of the technologies, most of you are like usyou learnbest by doing To help you gain a feel for the J2EE technologies we willcover, you will want to walk with us through the example system that weare building and find out for yourselves how the pieces fit together It isonly by seeing the entire system end-to-end, and by working through theexample on your own, that you will start to understand how the different

specifications

So, we want to welcome you on an adventure It's been a long, hard roadfor us in mastering these technologies, tools, and techniques We hope

we can make the way easier for you who are following us It will take a lot

of preparation and effort for you to really learn how and why to applythese technologies, and how best to take advantage of the features ofWebSphere, but we feel that the effort is worthwhile

side systems, and IBM has developed a wonderful set of tools that makethose technologies real We hope that by the time you reach the end ofthis book, you will understand and agree with why we think so highly ofthese tools We also hope that this book will enable you to start designingand building these large-scale, enterprise systems that J2EE,

J2EE is a terrific architecture for building scalable, manageable server-WebSphere, and WebSphere Studio Application Developer make

possible Thanks for coming along with us on this journey, and good luck

in reaching your destination

Building a book like this is a team effort We would like to acknowledgeall of those team members who contributed to this book but whose

names are not mentioned on the cover Without the important

contributions from these people, this book would not have been possible.These include Keys Botzum, Jaime Niswonger, Rachel Reinitz, ScottRich, and Geoff Hambrick We would also like to thank the remarkablegroup of people who have participated as reviewers of this project andprovided very insightful feedback and help That dedicated group

consisted of Keys Botzum, John Smith, Dan Kehn, Roland Barcia, PaulIlechko, Johannes DeJong, and Bobby Woolf You have our gratitude andour thanks

Welcome to Enterprise Java Programming with IBM WebSphere, 2nd Edition This book was designed to help you understand how to design,

build, and deploy applications based on the Java 2 Enterprise Edition(J2EE) using the IBM WebSphere family of tools and runtime This bookwas written for technical managers seeking guidance in understandingJ2EE and WebSphere; architects who wish to design scalable, secureenterprise applications; and for the day-to-day developer who wishes tocreate more robust, consistent code

You'll find our approach to be a bit different than other books Rather thansimply focusing on the bits and bytes of each technology component thatmakes up WebSphere, we take a slightly broader view We will show youhow J2EE and WebSphere combine to form an architecture and runtimesuitable for large, mission-critical applications

If you have already invested in the award-winning WebSphere Studiofamily of tools, or you are considering doing so, this book will ensure thatyou get the maximum productivity benefits WebSphere has to offer

Through hands-on examples, we will illustrate how the IBM WebSphereStudio family of tools helps you master enterprise application

development These examples will also demonstrate some of the J2EEbest practices which are intended to make your development tasks

easier, your code more maintainable, and your enterprise projects

successful Along the way, we will also provide rationale for our

approaches to building enterprise applications We will start by

discussing the importance of enterprise development, explaining thedevelopment process, and presenting the topology of properly layeredenterprise applications