Beginning Java Google App Engine

265 Pages·2009·2.41 MB·English

cYAn YellOW
mAgenTA BlAcK
PAnTOne 123 c
BOOKs fOR PROfessIOnAls BY PROfessIOnAls® eXPeRT’s VOIce® In clOud cOmPuTIng
Companion
eBook Available
Beginning Java Google App
™
Beginning
Engine
FPO
Dear Reader,
Cloud computing is becoming a model of choice for many developers like Beginning
yourself. This book gives you the keys to Google App Engine, which is a major
Cloud platform for JavaTM. We’ll show you all the core components of the SDK,
Kyle Roche
the platform, and the services that Google provides – the essentials for building
Java Google
a web application on App Engine.
You'll learn how to put App Engine to work quickly, starting with the Google ™
Plugin for Eclipse and moving on to the development server, the datastore, Java
Data Objects (JDO), and Persistence as a Service. Then we'll show you how to use
Spring as a Service for transaction, data access, and more. You'll see how you can
create Ajax applications with Google Web Toolkit, and how to build Web apps that
even integrate with Salesforce.com and Google Wave. And once your app is up App Engine
and running, you'll learn how to monitor, manage, and maintain it.
Beginning Java™ Google App Engine gives you a complete guided tour of
Google App Engine. Once you’ve read this book, you’ll be able to implement
your next big project with this exciting new platform, with the knowledge and
skills you’ve gained from this book as your foundation.
Jeff Douglas

Kyle Roche and Jeff Douglas
THE APRESS ROADMAP
Learn about the core components of the Google
Beginning Java™ EE 6 Beginning JavaTM
Platform with GlassFish™ 3 Google App Engine Pro Scala App Engine SDK, platform, and services for web
Companion eBook
developers using JavaTM technology
Beginning Groovy The Definitive Guide to Grails,
Pro Hadoop
and Grails Second Edition
The Definitive Guide to Lift:
Beginning Scala A Scala-based
See last page for details Web Framework
on $10 eBook version
SOURCE CODE ONLINE
www.apress.com D Kyle Roche and Jeff Douglas
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u
ISBN 978-1-4302-2553-9 o
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US $44.99 54499 lach
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Shelve in:
Web Development /
Programming Languages / Java
User level:
9 781430 225539
Beginner to Intermediate
this print for content only—size & color not accurate 7.5 x 9.25 spine = x.xxx" xxx page count
cYAn YellOW
mAgenTA BlAcK
PAnTOne 123 c
OOKs fOR PROfessIOnAls BY PROfessIOnAls® eRT’s VOIce® In clOud cOmPuTI
Beginning Java Google App
™
Engine
FPO
Dear Reader,
Cloud computing is becoming a model of choice for many developers like
yourself. This book gives you the keys to Google App Engine, which is a major
Cloud platform for JavaTM. We’ll show you all the core components of the SDK,
Kyle Roche
the platform, and the services that Google provides – the essentials for building
a web application on App Engine.
You'll learn how to put App Engine to work quickly, starting with the Google
Plugin for Eclipse and moving on to the development server, the datastore, Java
Data Objects (JDO), and Persistence as a Service. Then we'll show you how to use
Spring as a Service for transaction, data access, and more. You'll see how you can
create Ajax applications with Google Web Toolkit, and how to build Web apps that
even integrate with Salesforce.com and Google Wave. And once your app is up
and running, you'll learn how to monitor, manage, and maintain it.
Beginning Java™ Google App Engine gives you a complete guided tour of
Google App Engine. Once you’ve read this book, you’ll be able to implement
your next big project with this exciting new platform, with the knowledge and
skills you’ve gained from this book as your foundation.
Jeff Douglas

Kyle Roche and Jeff Douglas
THE APRESS ROADMAP
Beginning Java™ EE 6 Beginning JavaTM
Platform with GlassFish™ 3 Google App Engine Pro Scala
Companion eBook
Beginning Groovy The Definitive Guide to Grails,
Pro Hadoop
and Grails Second Edition
The Definitive Guide to Lift:
Beginning Scala A Scala-based
See last page for details Web Framework
on $10 eBook version
SOURCE CODE ONLINE
www.apress.com
US $44.99
Shelve in:
Web Development /
Programming Languages / Java
User level:
Beginner to Intermediate
this print for content only—size & color not accurate 7.5 x 9.25 spine = x.xxx" xxx page count
™
Beginning Java
Google App Engine

■ ■ ■

Kyle Roche
Jeff Douglas
Beginning Java™ Google App Engine
Copyright © 2009 by Kyle Roche and Jeff Douglas
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage or retrieval
system, without the prior written permission of the copyright owner and the publisher.
ISBN-13 (pbk): 978-1-4302-2553-9
ISBN-13 (electronic): 978-1-4302-2554-6
Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1
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Lead Editor: Steve Anglin
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Technical Reviewer: Kunal Mittal
Editorial Board: Clay Andres, Steve Anglin, Mark Beckner, Ewan Buckingham, Gary Cornell,
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There’s an Irish saying . . . no man can prosper without his woman’s leave. —KR
To Cathy, who has touched not only my heart,
but the hearts of so many that will never remember her. I love you. —JD

Contents at a Glance
Foreword.................................................................................................................xiii
About the Authors.....................................................................................................xv
About the Technical Reviewer................................................................................xvii
Acknowledgments...................................................................................................xix
Introduction.............................................................................................................xxi
Chapter 1: Beginning Google App Engine for Java....................................................1
Chapter 2: Introduction to App Engine.......................................................................7
Chapter 3: Getting Started with Google App Engine for Java...................................25
Chapter 4: Servlet Container and Frameworks........................................................43
Chapter 5: Developing Your Application...................................................................89
Chapter 6: Authenticating Users.............................................................................123
Chapter 7: Using the App Engine Datastore............................................................135
Chapter 8: App Engine Services.............................................................................169
Chapter 9: Administration and Integration.............................................................197
Index.......................................................................................................................221
v
vi
Contents
Foreword.................................................................................................................xiii
About the Authors.....................................................................................................xv
About the Technical Reviewer................................................................................xvii
Acknowledgments...................................................................................................xix
Introduction.............................................................................................................xxi
Chapter 1: Beginning Google App Engine for Java....................................................1
Cloud Computing and App Engine.................................................................................................................1
Find More Time to Innovate......................................................................................................................4
What You’ll Learn in This Book.................................................................................................................5
Summary.......................................................................................................................................................6
Chapter 2: Introduction to App Engine.......................................................................7
App Engine Architecture................................................................................................................................7
Being a Good Neighbor With Quotas..............................................................................................................9
Billable and Fixed Quotas.......................................................................................................................10
Detailed Resource Quotas......................................................................................................................12
Components of an App Engine Application..................................................................................................22
Summary.....................................................................................................................................................23
Chapter 3: Getting Started with Google App Engine for Java...................................25
Where Do We Start?....................................................................................................................................25
Create Your First App Engine Project...........................................................................................................30
Local Development Server...........................................................................................................................37
Summary.....................................................................................................................................................42
vii
■ CONTENTS
Chapter 4: Servlet Container and Frameworks........................................................43
Choosing a Framework................................................................................................................................43
Servlets and JavaServer Pages...................................................................................................................46
Views......................................................................................................................................................46
Model......................................................................................................................................................59
Controller................................................................................................................................................64
Deployment Descriptor...........................................................................................................................69
PersistenceManager...............................................................................................................................69
Spring MVC..................................................................................................................................................70
Server Configuration...............................................................................................................................71
Views......................................................................................................................................................72
Adobe Flex...................................................................................................................................................74
Server Configuration...............................................................................................................................76
Client-Side Code.....................................................................................................................................79
Server-Side Code....................................................................................................................................83
Summary.....................................................................................................................................................88
Chapter 5: Developing Your Application...................................................................89
Functional Specifications............................................................................................................................89
Timecard UI Mock-up.............................................................................................................................90
Technical Specifications..............................................................................................................................91
Authentication........................................................................................................................................91
Presentation...........................................................................................................................................91
Persistence.............................................................................................................................................92
Using Google Web Toolkit............................................................................................................................92
Creating Your Project..............................................................................................................................93
Running the Initial Starter Application....................................................................................................96
Developing Your Application........................................................................................................................97
Required Imports..................................................................................................................................101
Coding Your UI......................................................................................................................................102
viii