Lean service architectures with Java EE 6

The complexity and bloat often associated with Java EE are largely due to the inherent complexity of distributed computing; otherwise, the platform is surprisingly simple. As I discussed in my last article for JavaWorld, Enterprise JavaBeans (EJB) 3.1 actually consists of annotated classes and interfaces that are even leaner than classic POJOs; it would be hard to find anything more to simplify. Nonetheless, (mis)use of Java EE can lead to bloated and overstated architectures. In this article, I discuss the essential ingredients of a lean service-oriented architecture (SOA), then explain how to implement one in Java EE without compromising maintainability. I'll start by describing aspects of SOA implementation that lend themselves to procedural programming, then discuss domain-driven (aka object-oriented) design.

read more : Lean service architectures with Java EE 6