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EclipseLink/UserGuide/JPA/Basic JPA Development


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Basic JPA Development

To develop a JPA project, you must be aware of the following items:

Project development is a 3-step process.

Step 1

Define your persistence units in persistence.xml.

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For more information, see Section 3.1, "EntityManager," and Chapter 8. "Entity Packaging." in the JPA Specification.

Step 2

Annotate classes with @Entity, @Embeddable, and @MappedSuperClass and/or define classes in your mapping file (orm.xml).

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For more information, see Chapter 2 "The Entity Class" in the JPA Specification.

Step 3

Configure your application with:

  • javax.persistence.transactionType
  • javax.persistence.jtaDataSource
  • javax.persistence.nonJtaDataSource


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