Versioning REST APIs with a custom Accept header in Jersey

Versioning REST APIs is a hot topic these days. In this post, I will show you how versioning with a custom Accept header works in Jersey, without going into the politics of which versioning approach is the best. I will build on the project from one of my previous posts on rest.

Troubleshooting in Java

This post is just a collection of troubleshooting tips that I've picked up during the years.

Environment configuration property injection using Java CDI

In Spring Framework, injecting environment properties is made simple using the context:property-placeholder to configure property file locations and the @Value("#{propKey}") annotation to specify the key of the property.

Java CDI does not have an equivalent out-of-the-box, but it's flexible and rolling your own is easy using a single qualifier and a producer method.

How-to: RESTful Web services with JAX-RS and Spring

When providing services in a specific technology (i.e. EJB, JAX-WS, JAX-RS), it's wise to avoid mixing the business logic of your service and the technology that you are using to expose it to the outside world. This separation facilitates easier adoption of newer technologies and makes it easier to maintain and test services.

Testing Java classes with field injections

Dependency injection frameworks in Java give us 3 points of injection: constructor, field and setter methods. Many of us prefer field injection because we can skip writing setter methods and keep the number of lines to a minimum. The downside of field injection is that the class no longer can be used or tested without a dependency injection framework, for instance during unit-testing. In this post, I'm going to look at how we can unit-test a class with field injections.

Working with JAXB for binding XML

Here are a few snippets for binding Java objects to XML using JAXB.

Apache Wicket 6.5 vs. JSF 2.0

Having developed several web applications with JSF, and recently with Apache Wicket, I want to share my experience. On the web, Wicket has mostly positive buzz, but JSF seems to be hated by many (See http://ptrthomas.wordpress.com/2009/05/15/jsf-sucks/). I beg to differ.

Before I start, it should be noted that many of the frustrations and limitations of JSF discussed around the web have been have been addressed in version 2.0. And one more thing, the comparison aspects below are in no particular order.