Designing and building a web application using AJAX and Java EE 5 can present a lot of challenges to developers:

• how much AJAX to use and where to use it
• how to apply Model View Contoller and other design patterns
• how to build your domain model with Java Persistence APIs
• whether to return XML or HTML or JSON to service XMLHttpRequests
• how to leverage RSS feeds as data sources
• how to mash up with Google Map APIs to provide location-specific searches of your data
• how to wrap AJAX in JSF components
• how to incorporate an existing AJAX library like DOJO toolkit
• how to choose a convention for JavaScript you write
• and many other design choices

The Java Pet Store 2.0, Early Access, provides a reference application illustrating the blueprints for designing a complex AJAX web application on Java EE 5. The Java Petstore 2.0 runs on a Java EE application server such as the Java EE 5 SDK or the GlassFish project.

Download the first early access public release of Java Pet Store 2.0!
The download also includes a NetBeans project to make it easy to use in an IDE.