Java Persistence API

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The Java Persistence API (JPA) is a Java application programming interface for accessing, persisting, and managing data between Java objects / classes and a relational database. It is a collection of classes and methods to persistently store the vast amounts of data into a database. JPA was defined as part of the EJB 3.0 specification as a replacement for the EJB 2 CMP Entity Beans specification. It describes the management of relational data in applications using Java Platform, Standard Edition and Java Platform, Enterprise Edition. JPA is now considered the standard industry approach for Object to Relational Mapping (ORM) in the Java Industry.

Java Persistence consists of four areas:

  • Object/relational mapping metadata
  • The Java Persistence API
  • The query language
  • The Java Persistence Criteria API

               JPA CACHING

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