Business Logic Using EJB

Abstract

The EJB 3.2 specification has been included as part of the Java EE 7 release, and with it will come more enhancements to further solidify the Java enterprise platform. Although the EJB 3.2 release does not include any radical redesigns, it helps improve developer productivity and flexibility by adding a few new features and bringing the specification into alignment with other EE 7 technology updates. The updates include minor enhancements to the transactional life cycle, bean passivation, timers, and more. New features have been added to EJB Lite, a subset of features for those who do not need the entire EJB stack. Better alignment with the Java Message Service (JMS) has also been added, making it even easier to configure message-driven beans (MDBs). Lastly, a handful of features that are rarely used, or induce overhead, have been pruned from the release to make it even easier to use. This chapter will focus on each area of the updates and show examples of how to utilize the latest features.