Java Enterprise in a Nutshell (In a Nutshell (OReilly))

6.1. What Version Is Covered Here?

As discussed in the introduction to this book, the current versions of virtually all the prominent J2EE servers support the 1.4 version of the J2EE specification. This translates to supporting the EJB 2.1 specification, the version required by J2EE 1.4. At the time of this writing, however, draft versions of the EJB 3.0 specification have been distributed, and various vendors and open source projects have announced support for the new version. Since the EJB 3.0 specification is still in development and likely to change before it is finalized, we've restricted our coverage in the chapter to EJB 2.1. But at the end of the chapter, we do provide a short summary of the new programming model being planned for EJB 3.0.

The code examples in this chapter have been tested in the EJB container in JBoss 4.