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Enterprise Java Programming with IBM WebSphere by Daniel Berg, Greg Hester, Mark Weitzel, Gary Craig, David Pitt, Jim Amsden, Kyle Brown, Russell Stinehour, Peter M. Jakab

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Chapter 23. Simple CMP Entity Beans

In Chapter 19 you read that there are three types of EJBs supported by WebSphere—MDBs, session beans, and entity beans. You have already learned a lot about how session beans work, and how they are developed in WebSphere Studio for deployment into WAS. Now it is time to discover another part of the puzzle—how CMP entity beans work, and how they provide access to persistent data stored in a relational database.

Container managed entity beans within road map.

Figure 23.1. Container managed entity beans within road map.

Entity Bean Basics

Earlier, in the chapter on EJB architecture, we discussed how entity beans could provide access to data sources like a relational ...

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