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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
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DWR Java AJAX Applications

DWR Java AJAX Applications

5 (2)
By: Sami Salkosuo
Buy this Book

Overview of this book

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

Integrating a Database with DWR

Here, we integrate a database with DWR by exposing a database table via a remoted Java class. Our Java class connects directly to the database using JDBC, and related SQL statements are included in the class. Other ways to access databases include EJBs, Hibernate, and numerous others.

The example here replaces the first example in Chapter 4, Tables and Lists, so that country data comes from a database instead of a CSV file. From the application point of view there is only one change required in the dwr.xml file and that is changing the entry to point to the Java class that handles database access. Before we implement the Java class we have to set up and populate the database. Here we use Apache Derby database, which comes bundled with the Geronimo application server.

Configuring the Database in Geronimo

The first thing to do is to set up a database and table for our country data. This is easy when using Geronimo because it gives us the necessary tools for database...

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