Accelerated GWT: Building Enterprise Google Web Toolkit Applications

313 Pages·2008·6.64 MB·English

by  Vipul Gupta

CYAN YELLOW
MAGENTA bLACK
PANTONE 123 C
EMPOWERING PRODUCTIVITY FOR THE JAVA™ DEVLOPER THE EXPERT’s VOICE® IN WEb DEVELOPMENT
Companion
eBook
Available
Accelerated GWT: Building Enterprise
Google Web Toolkit Applications
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Dear Reader, c Accelerated
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Writing web applications in JavaScript and making them work in different l
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browsers has long been an issue faced by developers. Not anymore! Discover
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the GWT framework, which helps you write Ajax-based web applications in
a
Java and then converts them into JavaScript for all supported browsers. GW T
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Accelerated GWT is my way of taking the pain out of learning GWT for you. e
As a developer, I was immediately excited by the idea of not doing repetitive d
coding and adding tweaks to make an application compatible with different
browsers. Since then, I’ve come to understand and admire the clarity and ease G
of developing web applications using GWT. I can honestly say that GWT greatly
simplifies the creation of complex Ajax-based web applications and puts a lot W
of fun back into developing.
If you’re trying to decide whether GWT would be good for your project,
you’ll find that this book covers what you need to know and what you can gain
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by using it.
After mastering the fundamentals of GWT, you’ll learn about the remote
procedure calls and the asynchronous callback mechanism, how to write test
cases and benchmark tests for your application, how to bundle images, how to
write applications with internationalization in mind, and how to design reusable
Building Enterprise Google
modules. In addition, you’ll learn how to compile and convert your Java code
into JavaScript and deploy your applications on a web server. Throughout the
book, you’ll find a large number of examples to help you understand and use
Web Toolkit Applications
these features with ease.
After reading this book, you will thoroughly understand the GWT framework
and what it can do for your applications.
Vipul Gupta
Write high-performance Ajax applications using
Companion eBook
Google Web Toolkit (GWT) to generate optimized
THE APRESS ROADMAP JavaScript and avoid the dreaded browser “quirks.”
Accelerated GWT: Building
Enterprise Google Web Toolkit
Beginning Google Web Toolkit:
See last page for details From Novice to Professional
on $10 eBook version Pro Web 2.0 Application
Development with GWT
Vipul Gupta
SOURCE CODE ONLINE ISBN-13: 978-1-59059-975-4
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Accelerated GWT
Building Enterprise Google
Web Toolkit Applications
Vipul Gupta
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Accelerated GWT: Building Enterprise Google Web Toolkit Applications
Copyright © 2008 by Vipul Gupta
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
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ISBN-13 (pbk): 978-1-59059-975-4
ISBN-10 (pbk): 1-59059-975-6
ISBN-13 (electronic): 978-1-4302-0616-3
ISBN-10 (electronic): 1-4302-0616-0
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To my parents,for always being supportive and loving
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Contents at a Glance
About the Author .................................................................xv
Acknowledgments ...............................................................xvii
Introduction .....................................................................xix
PART 1 n n n Getting Started with GWT
nCHAPTER 1 GWT Basics and a First Application .............................3
nCHAPTER 2 GWT Architectureand Internal Features........................27
PART 2 n n n UI Programming and Client-Server
Communication
nCHAPTER 3 UI Programming:Basic Widgets ...............................59
nCHAPTER 4 Communication:RPC ..........................................89
nCHAPTER 5 UI Programming:Handling Events and Using AdvancedWidgets...105
nCHAPTER 6 Communication:Advanced Techniques .......................135
PART 3 n n n Making Applications Ready for
the Real World
nCHAPTER 7 Testing GWT Applications ....................................171
nCHAPTER 8 Internationalizing Your Applications:A Modern-Day Reality ....201
nCHAPTER 9 Some Important,Not-to-Be-Missed Techniques ...............233
nCHAPTER 10 Peeking Into the Upcoming GWT 1.5 Release ..................265
nINDEX .......................................................................283
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Contents
About the Author .................................................................xv
Acknowledgments ...............................................................xvii
Introduction .....................................................................xix
PART 1 n n n Getting Started with GWT
nCHAPTER 1 GWT Basics and a First Application ........................3
Setting Up Your GWT Environment .................................4
Hosted Mode vs.Web Mode .......................................4
Web Mode .................................................4
Hosted Mode ...............................................5
What Are All Those GWT Files For? .................................6
Creating Your First GWT Application ................................6
Tools for Creating a Project...................................6
Running the Application Using Generated Scripts................9
Working with Modules in GWT ....................................11
Structure of a Module File ...................................11
Creating the Host HTML File ......................................15
Steps to CreateaGWT Application ................................16
Creating Another Application Step-by-Step .........................17
Creating the Basic Project Structure ..........................17
Adding the Module File .....................................17
Creating the Entry-Point Class ...............................18
Creating the Host HTML File .................................21
Running the Application in Hosted Mode ......................22
Summary ......................................................25
nCHAPTER 2 GWT Architecture and Internal Features ..................27
Understanding the Components That Make Up the GWT Framework ...27
Development Tools Explained................................27
Class Libraries Explained....................................28
What Version of the Java Language Does the GWT Support? .........31
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viii nCONTENTS
The Same Origin Policy and Its Implications on GWT.................33
Same Origin Policy Explained ................................33
What Are the Implications of the Same Origin Policy on GWT? ...34
Deferred Binding................................................34
Understanding Generator,Related Classes,and Code Generation
UsingGenerators .............................................36
Example of Using Generator to Autogenerate Code for Your
Applications ............................................39
Building the Generator-Based Application .....................40
GWT:Startup/Bootstrap Process ..................................52
Summary ......................................................55
PART 2 n n n UI Programming and Client-Server
Communication
nCHAPTER 3 UI Programming: Basic Widgets ...........................59
GUI Building with Fundamental Widgets ...........................59
Hierarchy of Base Classes Explained .........................60
How Do You Use the Widgets Provided by GWT? ...............65
Understanding Layouts Using Panels ..............................70
Starting with a RootPanel ...................................72
Aligning Widgets Using a CellPanel ...........................72
What Is an HTMLTable Panel? ...............................76
WhatIs a FlowPanel? .......................................78
Creating Complex Widgets Using Composites.......................79
Developing a Sample Application Using Composites ............80
Summary ......................................................86
nCHAPTER 4 Communication: RPC .......................................89
Understanding RPC .............................................89
Howto Use RPC in GWT .........................................90
Creating Service Interface (Also Called the Synchronous Interface) ...90
Creating the Asynchronous Interface .........................91
Understanding the AsyncCallback Interface....................91
Making an Actual Remote Procedure Call .....................92
Your First Complete RPC Example .................................93
RPC in GWT:Behind the Scenes .................................100
Summary .....................................................103