Sun Certified Enterprise Architect for Java EE Study Guide (2nd ed.) [Cade & Sheil 2010-02-08].pdf

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Sun Certified Enterprise Architect

for Java

™

EE Study Guide

Second Edition

Mark Cade and Humphrey Sheil

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Library of Congress Cataloging-in-Publication Data:

Cade, Mark.

Sun Certified Enterprise Architect for Java EE study guide / Mark Cade, Humphrey Sheil. — 2nd ed.

p. cm.

Previous ed.: Sun Certified Enterprise Architect for J2EE technology study guide, 2002.

ISBN 978-0-13-148203-6 (pbk. : alk. paper) 1. Electronic data processing personnel—Certification. 2. Java

(Computer program language)—Examinations—Study guides. I. Sheil, Humphrey. II. Cade, Mark. Sun Certified

Enterprise Architect for J2EE technology study guide. III. Title.

QA76.3.C23 2010

005.13’3—dc22

2009052010

permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system,

or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For

information regarding permissions, write to:

Pearson Education, Inc

Rights and Contracts Department

501 Boylston Street, Suite 900

Boston, MA 02116

Fax (617) 671 3447

ISBN-13: 978-0-13-148203-6

ISBN-10: 0-13-148203-3

Text printed in the United States on recycled paper at RR Donnelley in Crawfordsville, Indiana

First printing February 2010

I dedicate this book to my lovely wife Lara for putting up with all the long hours.

Your support, compassion, and love drove me to finish this book. I look forward to

a wonderful vacation to make up for the time spent on this book.

—Mark Cade

I wish the reader of this book the very best toward passing the SCEA exam,

and in the process, becoming a better architect. Better architects create better

designs and code—and that’s what we all strive to do.

—Humphrey Sheil

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Contents

Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . xv

About the Authors . . . . . . . . . . . . . . . . . . . . . . . xvii

Chapter 1

What Is Architecture? . . . . . . . . . . . . . . . . . . . . . . 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Prerequisite Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Understanding Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Role of the Architect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

More Detail on the Exam Itself . . . . . . . . . . . . . . . . . . . . . . . . . 6

Part I: Multiple Choice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Part II: Solving the Business Problem . . . . . . . . . . . . . . . . . . . 8

Part III: Defending Your Solution . . . . . . . . . . . . . . . . . . . . . . . 9

Preparing for the Exam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Preparing for Part I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Preparing for Part II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Preparing for Part III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Essential Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Review Your Progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter 2

Architecture Decomposition . . . . . . . . . . . . . . . . 13

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Prerequisite Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Decomposition Strategies . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Layering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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