The Metro Web services stack is based on the reference implementations of the JAXB 2.x and JAX-WS 2.x Java™ standards but also includes support for a full range of WS-* SOAP extension technologies.

Start with a Java applet and build a server-based proxy system that uses your browser to access an arbitrary Web service. You'll use JavaScript code to access applet-based information and call a servlet, which retrieves the remote information. Thus, you bypass the same-server restrictions on what an applet can and cannot do.

A query for persistent Java™ objects is typesafe if a compiler can verify it for syntactic correctness. Version 2.0 of the Java Persistence API (JPA) introduces the Criteria API, which brings the power of typesafe queries to Java applications for the first time and provides a mechanism for constructing queries dynamically at run time. This article describes how to write dynamic, typesafe queries using the Criteria API and the closely associated Metamodel API.

This article gives you a hands-on introduction to developing for and deploying on the Amazon Elastic Compute Cloud (EC2). Learn how EC2 differs from Google App Engine, and leverage an Eclipse plug-in and the concise Groovy language to get a simple Web application up and running quickly on EC2.

Porting great infrastructure to OSGi often means solving complex classloading problems. This article is dedicated to one of the the hardest issues in this area: dynamic code generation.

The Metro Web service stack provides a comprehensive solution for accessing and implementing Web services. It's based on the reference implementations of the JAXB 2.x and JAX-WS 2.x Java™ standards, with added components to support WS-* SOAP extension technologies and actual Web service deployment.

If you're a Java programmer coming to Dojo with little or no experience of JavaScript, chances are you're going to struggle with some of the concepts that enable it to work. The main concerns with Dojo are that — at the time of writing — it is still in its infancy (version 1.0 was only released in February 2008) and the documentation available is still somewhat limited. This article helps you bridge the gap from Java code to Dojo so that you can get up to speed quickly and use the toolkit when developing your applications.

Lack of native Java™ support in the Facebook Platform needn't be an obstacle to building third-party Facebook applications in the Java language. This article shows how to create a Facebook app, implement it in Java, and deploy it on Google's App Engine service.

Online attackers grow more ingenious, with their exploits becoming more audacious and potentially more lucrative. We say crime doesn't pay, and yet the aggregated scale of online crime puts attackers' revenues at around the GDP equivalent of a large country. As software professionals, we have a duty to fight these attackers, and the means to do it in our arsenal of software tools and techniques. One key technique is data validation, which can filter out all kinds of nasty data. Stephen B. Morris explores Java-based validation with some examples using Hibernate Validator.

You don't need to debug Java™ applications on just your local desktop. Learn how to spread around your debugging using different connection types that make up remote debugging. This article explains the features and examples that show how to set up remote application debugging. Remote debugging can be useful for application development, such as developing a program for a low-end machine that cannot host the development platform, or debugging programs on dedicated machines like Web servers, whose services cannot be shut down. Other examples include Java applications running with limited memory or CPU power, such as mobile devices, or developers wanting to separate the application and development environments, etc.