8.1 Organization of this chapter

The JPA is a specification aimed at simplifying the designing and coding of the database-related processing and is used for mapping Java objects and relational database (O/R mapping). By using the JPA, you can operate the database information as a Java object (entity), and set up a system efficiently.

This chapter gives an overview of JPA and describes the JPA usage with Application Server. The following table describes the organization of this chapter.

Table 8‒1: Organization of this chapter (Using JPA with Application Server)

Category	Title	Reference location
Description	Features of JPA	8.2
	JPA functionality that can be used with Application Server	8.3
	EntityManager	8.4
	Persistence context	8.5
Implementation	How to obtain a container-managed EntityManager	8.6
	How to obtain an application-managed EntityManager	8.7
	Definitions in persistence.xml	8.8
	Allocating persistence.xml	8.9
	JPA interfaces	8.10
Notes	Notes on setting up applications	8.11

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