Expert's Voice in Java

By: Frank Zammetti

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Paperback | 24 January 2008

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568 Pages

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23.4 x 18.1 x 2.8

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The Ajax craze is sweeping the world, and there is no shortage of libraries from which to choose to make it all easier to develop. One of those libraries has risen near the top in the Java space, and that library is DWR. DWR, or Direct Web Remoting, allows you to treat your Java classes running on the server as if they were local objects running in the browser, bringing the full power of your server-side business logic to the client without the usual problems that entails. In this book, you will:

Explore DWR and all it offers
Find six full, working applications that use DWR, instead of a lot of theoretical musings
Learn by example, more importantly, by doing, as you tear the applications apart, see what makes them tick, and even extend them at your own pace

In the end, you'll have a great feel for what DWR offers and how Ajax can bring the world of Web 2.0 to your doorstep, and you'll have a good time doing it.

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Non-Fiction Computing & I.T.Computer Programming & Software Development Software Engineering Object-Oriented Programming or OOP Programming & Scripting Languages Web Programming Computer Networking & Communications

Foreword	p. xiii
About the Author	p. xv
About the Technical Reviewer	p. xvii
About the Illustrator	p. xix
Acknowledgments	p. xxi
Introduction	p. xxiii
Setting the Table
An Introduction to Ajax, RPC, and Modern RIAs	p. 3
A Brief History of Web Development: The "Classic" Model	p. 3
Dawn of a Whole New World: The PC Era	p. 5
Yet Another Revolution: Enter the Web	p. 7
What's So Wrong with the Classic Web?	p. 11
Enter Ajax	p. 14
Why Is Ajax a Paradigm Shift? On the Road to RIAs	p. 18
The Flip Side of the Coin	p. 23
Let's Get to the Good Stuff: Our First Ajax Code, the Manual Way	p. 25
A Quick Postmortem	p. 29
Hey, I Thought This Was Ajax?!?	p. 30
Cutting IN the Middle Man: Ajax Libraries to Ease Our Pain	p. 33
Alternatives to Ajax	p. 36
Hmm, Are We Forgetting Something? What Could It Be? Oh Yeah, DWR!	p. 39
Summary	p. 40
Getting to Know DWR	p. 43
First Things First: Why DWR at All?	p. 43
DWR: RPC on Steroids for the Web	p. 45
DWR Architectural Overview	p. 47
Getting Ready for the Fun: Your DWR Development Environment	p. 49
A Simple Webapp to Get Us Started	p. 52
Getting the Lay of the Land: Directory Structure	p. 52
From Code to Executable: Ant Build Script	p. 53
Application Configuration: web.xml	p. 54
The Markup: index.jsp	p. 55
On the Server Side: MathServlet.java	p. 56
The Workhorse: MathDelegate.java	p. 58
It's Alive: Seeing It in Action	p. 60
Adding DWR to the Mix	p. 61
The DWR Test/Debug Page	p. 65
Configuring DWR Part 1: web.xml	p. 67
Configuring DWR Part 2: dwr.xml	p. 70
Built-in Creators and Converters	p. 75
The [left angle bracket]init[right angle bracket] Section	p. 76
The [left angle bracket]allow[right angle bracket] Section	p. 76
The [left angle bracket]signatures[right angle bracket] Section	p. 79
Interacting with DWR on the Client	p. 81
Basic Call Syntax	p. 81
Call Metadata Object Approach	p. 82
A Word on Some Funky Syntax	p. 83
Setting Beans on a Remote Object	p. 83
Extended Data Passing to Callbacks	p. 87
Interacting with DWR on the Server	p. 88
DWR Configuration and Other Concepts: The engine.js File	p. 90
Call Batching	p. 92
A Quick Look at util.js, the DWR Utility Package	p. 92
Summary	p. 94
Advanced DWR	p. 95
Locking the Doors: Security in DWR	p. 95
Deny by Default	p. 96
J2EE Security and DWR	p. 98
When Perfection Is Elusive: Error Handling in DWR Applications	p. 101
Handling Warnings	p. 102
Handling Errors	p. 102
Handling Exceptions	p. 102
Edge Cases: Improper Responses	p. 102
The Mechanics of Handling Exceptional Situations	p. 105
Another Word on Exceptions	p. 106
Help from Elsewhere: Accessing Other URLs	p. 107
Turning the Tables: Reverse Ajax	p. 109
Polling	p. 111
Comet	p. 112
Piggybacking	p. 114
The Code of Reverse Ajax	p. 115
Don't Go It Alone: Integration with Frameworks and Libraries	p. 117
Spring	p. 118
JSF	p. 119
WebWork/Struts 2	p. 119
Struts "Classic"	p. 120
Beehive	p. 121
Hibernate	p. 122
Something Old, Something New: Annotations	p. 122
Summary	p. 125
The Projects
InstaMail: An Ajax-Based Webmail Client	p. 129
Application Requirements and Goals	p. 129
Dissecting InstaMail	p. 130
Configuration Files	p. 132
The Client-Side Code	p. 134
The Server-Side Code	p. 163
Suggested Exercises	p. 187
Summary	p. 188
Share Your Knowledge: DWiki, the DWR-Based Wiki	p. 189
Application Requirements and Goals	p. 189
FreeMarker	p. 191
Apache Derby	p. 194
Spring JDBC	p. 195
Dissecting DWiki	p. 197
Configuration Files	p. 199
The Client-Side Code	p. 205
The Server-Side Code	p. 230
Suggested Exercises	p. 257
Summary	p. 258
Remotely Managing Your Files: DWR File Manager	p. 259
Application Requirements and Goals	p. 259
dhtmlx UI Components	p. 261
Jakarta Commons IO	p. 268
Jakarta Commons FileUpload	p. 269
Dissecting Fileman	p. 270
Configuration Files	p. 273
The Client-Side Code	p. 278
The Server-Side Code	p. 314
Suggested Exercises	p. 326
Summary	p. 326
Enter the Enterprise: A DWR-Based Report Portal	p. 329
Application Requirements and Goals	p. 329
Spring Dependency Injection (IoC)	p. 331
DataVision	p. 333
Quartz	p. 336
script.aculo.us	p. 337
A Sample Database to Report Against	p. 340
Dissecting RePortal	p. 341
Configuration Files	p. 346
The RePortal Database	p. 351
The Client-Side Code	p. 352
The Server-Side Code	p. 385
Suggested Exercises	p. 416
Summary	p. 417
DWR for Fun and Profit (a DWR Game!)	p. 419
Application Requirements and Goals	p. 419
DWR Annotations	p. 420
Reverse Ajax in Action	p. 421
Anything Else, or Can We Get Goin' Already?!?	p. 422
Dissecting InMemoria	p. 423
Configuration Files	p. 424
The Client-Side Code	p. 426
The Server-Side Code	p. 441
Suggested Exercises	p. 456
Summary	p. 456
Timekeeper: DWR Even Makes Project Management Fun!	p. 457
Application Requirements and Goals	p. 457
HSQLDB	p. 458
Hibernate	p. 459
Ext JS	p. 461
Dissecting Timekeeper	p. 463
Configuration Files	p. 465
The Client-Side Code	p. 471
The Server-Side Code	p. 507
Suggested Exercises	p. 520
Summary	p. 521
Index	p. 523
Table of Contents provided by Ingram. All Rights Reserved.

Expert's Voice in Java

At a Glance

Paperback

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