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Chapter 3. Entities

Entities are classes that need to be persisted, usually in a relational database. In this chapter we cover the following topics:

  • EJB 3 entities
  • Java persistence API
  • Mapping an entity to a database table
  • Metadata defaults
  • Introduction to the entity manager
  • Packaging and deploying entities
  • Generating primary keys
  • Overriding metadata defaults
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