Chapter 13. Container-managed persistence
Overview
Container-managed persistence (CMP) is a technique for allowing the EJB container to handle all the synchronization between the entity EJB and the underlying persistent storage device, usually a relational database. This chapter describes how to make use of CMP in both the EJB 1.1 and EJB 2.0 models. The chapter starts with a description of some of the issues that any persistence management scheme must address. It then describes how these issues were tackled in the EJB 1.1 scheme. Examination of some of the problems with the EJB 1.1 model allows an insight into the way in which the EJB 2.0 CMP model, although complex, solves many of the problems that prevented a wide uptake of CMP in EJB 1.1. ...
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