Beginning Java Google App Engine

by Roche, Kyle

• ISBN13: 9781430225539
• ISBN10: 143022553X
• Format: Paperback
• Copyright: 2009-12-30
• Publisher: Springer Verlag

Summary

Google App Engine is one of the key technologies to emerge in recent years to help you build scalable web applications even if you have limited previous experience. If you are a Java programmer, this book offers you a Java approach to beginning Google App Engine. You will explore the runtime environment, front-end technologies like Google Web Toolkit, and the datastore behind App Engine. You'll also explore Java support on App Engine from end to end.The journey begins with a look at the Google Plugin for Eclipse and finishes with a working web application that even uses Groovy/Grails as a service. Along the way, the authors dive deeply into the services that are available to access the datastore with a focus on Java Data Objects (JDO), Persistence as a Service more generally, as well as Spring as a Service and more.You'll then be ready to look at some of the more advanced topics in application administration, such as scheduled tasks, remote access to the datastore, and the Google Analytics API. What you'll learn How to get up and running with App Engine, starting with the Google Plugin for Eclipse All about the development server for testing and developing your applications How to leverage the datastore in your applications, including Persistence as a Service How to use Spring as a Service for transactions, data access, and more How to use Google Web Toolkit to create AJAX components to drive your web applications Use of Groovy and possibly Grails as a Service for your web applications How to schedule cron jobs using App Engine for scheduled processing behind your applications Advanced topics including the remote data APIs and Google Analytic API Who is this book for?This book is for Java programmers looking to get started on Google App Engine, as well as App Engine programmers looking to move to Java. About the Apress Beginning SeriesThe Beginning series from Apress is the right choice to get the information you need to land that crucial entrylevel job. These books will teach you a standard and important technology from the ground up because they are explicitly designed to take you from "novice to professional." Yours"ll start your journey by seeing what you need to know-but without needless theory and filler. Yours"ll build your skill set by learning how to put together realworld projects step by step. So whether your goal is your next career challenge or a new learning opportunity, the Beginning series from Apress will take you there-it is your trusted guide through unfamiliar territory!

Table of Contents

Foreword	p. xiii
About the Authors	p. xv
About the Technical Reviewer	p. xvii
Acknowledgments	p. xix
Introduction	p. xxi
Beginning Google App Engine for Java	p. 1
Cloud Computing and App Engine	p. 1
Find More Time to Innovate	p. 4
What You'll Learn in This Book	p. 5
Summary	p. 6
Introduction to App Engine	p. 7
App Engine Architecture	p. 7
Being a Good Neighbor With Quotas	p. 9
Billable and Fixed Quotas	p. 10
Detailed Resource Quotas	p. 12
Components of an App Engine Application	p. 22
Summary	p. 23
Getting Started with Google App Engine for Java	p. 25
Where Do We Start?	p. 25
Create Your First App Engine Project	p. 30
Local Development Server	p. 37
Summary	p. 42
Servlet Container and Frameworks	p. 43
Choosing a Framework	p. 43
Servlets and JavaServer Pages	p. 46
Views	p. 46
Model	p. 59
Controller	p. 64
Deployment Descriptor	p. 69
PersistenceManager	p. 69
Spring MVC	p. 70
Server Configuration	p. 71
Views	p. 72
Adobe Flex	p. 74
Server Configuration	p. 76
Client-Side Code	p. 79
Server-Side Code	p. 83
Summary	p. 88
Developing Your Application	p. 89
Functional Specifications	p. 89
Timecard UI Mock-up	p. 90
Technical Specifications	p. 91
Authentication	p. 91
Presentation	p. 91
Persistence	p. 92
Using Google Web Toolkit	p. 92
Creating Your Project	p. 93
Running the Initial Starter Application	p. 96
Developing Your Application	p. 97
Required Imports	p. 101
Coding Your UI	p. 102
Adding Your Styles	p. 107
Modifying Your Hosted Page	p. 107
Running Your Application	p. 108
Handling Client-Side Events	p. 108
Summary	p. 121
Authenticating Users	p. 123
Introducing Google Accounts	p. 123
Restricting Access to Resources	p. 124
Users API	p. 125
Development Mode	p. 126
Adding Authentication for Your Application	p. 127
Loginlnfo Class	p. 128
LoginService and LoginServiceAsync Interfaces	p. 129
Google Accounts Login Implementation	p. 130
Modifying the Deployment Descriptor	p. 131
Modifying the User Interface	p. 131
Summary	p. 133
Using the App Engine Datastore	p. 135
Introducing the App Engine Datastore	p. 135
Working with Entities	p. 136
Classes and Fields	p. 137
CRUDing Entities	p. 143
Performing Queries with JDOQL	p. 145
Filtering Queries	p. 146
Sorting Queries	p. 147
Query Ranges	p. 147
Using Indexes	p. 147
Building Indexes	p. 148
Creating Indexes In Development Mode	p. 148
Using Transactions	p. 149
Finishing Up Your Application	p. 150
Making Remote Procedure Calls with GWT RPC	p. 150
Creating Your Data Service	p. 156
Modifying the Deployment Descriptor	p. 161
Invoking the Service from the GWT Client	p. 161
Displaying Timecard Entries	p. 166
Summary	p. 168
App Engine Services	p. 169
Setting up the Project	p. 169
Memcache Service	p. 171
URL Fetch Service	p. 175
Images Service	p. 178
Creating the Java Classes	p. 179
Writing the ImageObject Class	p. 180
Writing the PersistenceManagerFactory Class	p. 182
Writing the ImageSource Class	p. 182
Writing the ImageTransform Class	p. 183
Completing the Application	p. 186
Testing the Service	p. 187
Mail API	p. 189
XMPP Service	p. 192
Summary	p. I95
Administration and Integration	p. 197
Managing Your App Engine Application	p. 197
The Application Dashboard	p. 199
Application Versioning	p. 203
Analyzing Log Files	p. 204
Integration	p. 206
Integration with Google Wave	p. 206
Integration with Salesforce.com	p. 214
Summary	p. 218
Index	p. 221
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