Mastering Enterprise JavaBeans - Roman_ Ed.pdf

(2290 KB) Pobierz
all_original
Mastering Enterprise
JavaBeans ™
Second Edition
Ed Roman
Scott Ambler
Tyler Jewell
Wiley Computer Publishing
John Wiley & Sons, Inc.
N EW YORK • CHICHESTER • WEINHEIM • BRISBANE • SINGAPORE • TORONTO
705571048.004.png 705571048.005.png
Publisher: Robert Ipsen
Editor: Robert M. Elliott
Developmental Editor: Emilie Herman
Managing Editor: John Atkins
Associate New Media Editor: Brian Snapp
Text Design & Composition: MacAllister Publishing Services, LLC
Designations used by companies to distinguish their products are often claimed as trade-
marks. In all instances where John Wiley & Sons, Inc., is aware of a claim, the product
names appear in initial capital or ALL CAPITAL LETTERS. Readers, however, should con-
tact the appropriate companies for more complete information regarding trademarks and
registration.
This book is printed on acid-free paper.
Copyright © 2002 by The Middleware Company. All rights reserved.
Published by John Wiley & Sons, Inc.
Published simultaneously in Canada.
No part of this publication may be reproduced, stored in a retrieval system or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, scanning or
otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copy-
right Act, without either the prior written permission of the Publisher, or authorization
through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222
Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 750-4744. Requests to the
Publisher for permission should be addressed to the Permissions Department, John Wiley
& Sons, Inc., 605 Third Avenue, New York, NY 10158-0012, (212) 850-6011, fax (212) 850-
6008, E-Mail: permreq@wiley.com.
This publication is designed to provide accurate and authoritative information in regard to
the subject matter covered. It is sold with the understanding that the publisher is not
engaged in professional services. If professional advice or other expert assistance is
required, the services of a competent professional person should be sought.
Library of Congress Cataloging-in-Publication Data:
ISBN: 0-471-41711-4
Printed in the United States of America.
10 9 8 7 6 5 4 3 2 1
705571048.006.png 705571048.007.png
To my wonderful wife, Younhi.
—Ed Roman
705571048.001.png
CONTENTS
Acknowledgments
xix
Preface
xxi
Introduction
xxv
About the Author
xxxi
Part One Overview
1
Chapter 1 Overview
3
The Motivation for EJB
4
Divide and Conquer to the Extreme
5
Component Architectures
12
Introducing Enterprise JavaBeans
13
Why Java?
14
EJB as a Business Solution
14
The EJB Ecosystem
16
The Bean Provider
17
The Application Assembler
17
The EJB Deployer
18
The System Administrator
19
The Container and Server Provider
19
The Tool Vendors
20
Summary of Roles
20
The Java 2 Platform, Enterprise Edition (J2EE)
22
The J2EE Technologies
23
Summary
26
Chapter 2 EJB Fundamentals
29
Enterprise Beans
29
Types of Beans
30
Distributed Objects: The Foundation for EJB
32
Distributed Objects and Middleware
34
Explicit Middleware
34
Implicit Middleware
35
What Constitutes an Enterprise Bean?
37
The Enterprise Bean Class
37
vii
705571048.002.png
viii
CONTENTS
The EJB Object
38
The Home Object
44
The Local Interfaces
46
Deployment Descriptors
50
Vendor-Specific Files
51
Ejb-Jar File
51
Summary of Terms
52
Summary
54
Chapter 3 Writing Your First Bean
55
How to Develop an EJB Component
55
The Remote Interface
57
The Local Interface
58
The Home Interface
58
The Local Home Interface
59
The Bean Class
62
The Deployment Descriptor
66
The Vendor-Specific Files
67
The Ejb-jar File
67
Deploying the Bean
68
The Optional EJB Client JAR file
68
Understanding How to Call Beans
69
Looking up a Home Object
70
Running the System
74
The Server-Side Output
75
The Client-Side Output
75
Implementing Component Interfaces
75
A Solution
76
Summary
77
Part Two The Triad of Beans
79
Chapter 4 Introduction to Session Beans
81
Session Bean Lifetime
81
Session Bean Subtypes
82
Stateful Session Beans
82
Stateless Session Beans
83
Special Characteristics of Stateful Session Beans
84
Achieving the Effect of Pooling with Stateful Beans
85
The Rules Governing Conversational State
86
Activation and Passivation Callbacks
87
705571048.003.png

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin