Java Reference
In-Depth Information
Part 1. Overview of the EJB landscape
This topic is about Enterprise Java Beans (EJB) 3, and covers up to the EJB 3.2 specific-
ation. The goal of EJB 3.2 is to continue to evolve the EJB specification to be a complete
solution for all Enterprise business needs and to improve the EJB architecture by reducing
its complexity from the developer's point of view.
Part 1
presents EJB 3 as a powerful, highly usable platform worthy of its place as the busi-
ness component development standard for mission-critical Enterprise development. We'll
introduce the Java Persistence API (JPA 2.1), a Java EE technology that aims to standardize
Java ORM and works hand-in-hand with EJB 3. We'll also take a quick look at Contexts and
Dependency Injection for Java (CDI 1.1), the next-generation generic type-safe dependency
injection technology for Java EE.
In
chapter 1
we introduce the pieces that make up EJB 3, touching on the unique strengths
EJB has as a development platform and the new features that promote productivity and ease
of use. We even throw in a “Hello World” example.
In
chapter 2
we provide more realistic code samples and introduce the Action-Bazaar ap-
plication, an imaginary Enterprise system developed throughout the topic. We'll try to give
you a feel for how EJB 3 looks as quickly and easily as possible. Be ready for a lot of code!
