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  • Book Overview & Buying DWR Java AJAX Applications
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DWR Java AJAX Applications

DWR Java AJAX Applications

By : Sami Salkosuo
5 (2)
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DWR Java AJAX Applications

DWR Java AJAX Applications

5 (2)
By: Sami Salkosuo
Buy this Book

Overview of this book

The initial part guides the reader through the features of DWR and how it works to make the developer ready for practical implementation. The later part contains plenty of code (with explanations) and graphical interface-driven step-by-step examples, which the reader can try out while surfing through the book to learn by doing. This book is written for competent Java developers and assumes that you are a professional rather than hobbyist. You should be familiar with the concepts of programming, Web 2.0, and AJAX.
Table of Contents (12 chapters)
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DWR Java AJAX Applications
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DWR Java AJAX Applications
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
Preface
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Preface
Lock Free Chapter
1
Introduction
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Introduction
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What is AJAX?
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DWR: AJAX for Java Developers
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The DWR Community
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Summary
2
DWR Features
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DWR Features
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Ease of Use
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Reverse AJAX
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DWR JavaScript Libraries
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Converters
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Creators, Filters, and Signatures
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Integration with Other Projects
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Security
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Summary
3
Getting Started
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Getting Started
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Supported Browsers and Environments
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Configuration
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Setting up a Development Environment
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Testing and Debugging
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Error Handling
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Packaging and Deployment
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Summary
4
User Interface: Basic Elements
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User Interface: Basic Elements
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Creating a Dynamic User Interface
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Implementing Tables and Lists
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Implementing Field Completion
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Summary
5
User Interface: Advanced Elements
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User Interface: Advanced Elements
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Creating Forms
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Building a Navigation Tree
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Map Scrolling Using DWR
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Summary
6
Backend Integration
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Backend Integration
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Integrating a Database with DWR
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Integrating with Web Services
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Integrating with a Messaging System
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Summary
7
Sample Applications
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Sample Applications
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Collaborative Book Authoring
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Chatroom
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Summary

Chatroom

The Chatroom sample application is a very typical multi-user chatroom. The functionalities of this sample include a list of online users, automatic refresh of chat text, and the ability to send messages to the chat room.

Some of the code here is taken directly from the previous Book Authoring sample. Only the package names have been changed while the rest of the code is basically just copy-pasted to a new class

Re-use by copy-paste is not a recommended practice, but it is done here in order to keep these samples self-contained without dependencies to other samples.

Starting the Project and Configuration

We start by creating a new project for our chat room, with the project name DWRChatRoom. We also need to add the dwr.jar file to the lib directory and enable DWR in the web.xml file. The following is the source code of the dwr.xml file. 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC
"-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
"http://getahead.org...
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
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DWR Java AJAX Applications
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