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Java EE 7 Developer Handbook by Peter A. Pilgrim

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Chapter 4. Essential Java Persistence API 3.2

Alice Walker said, "In search of my mother's garden, I found my own."

In the last chapter, we introduced the session beans, which are the business service endpoints for your Java EE application. In this chapter, we are changing over to persistence, in what used to be called entity EJBs in the older J2EE specifications, but are now simply called Persistence Capable Objects (PCO).

The Java Persistence API (JPA), JSR 338, Version 3.2 is the specification that mandates how persistence can be applied to the objects in the Java EE product. One solution is storing data and a standard. Other solutions do exist, which also handle the problem of accessing and reading data into different types of long-term storage ...

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