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The designers [6] of the Java Persistence API aimed to provide for relational persistence, with many of the key areas taken from object-relational mapping tools such as Hibernate and TopLink. Java Persistence API improved on and replaced EJB 2.0, evidenced by its inclusion in EJB 3.0.
The Jakarta Persistence Query Language (JPQL; formerly Java Persistence Query Language) is a platform-independent object-oriented query language [1]: 284, §12 defined as part of the Jakarta Persistence (JPA; formerly Java Persistence API) specification. JPQL is used to make queries against entities stored in a relational database.
It features Java Persistence API 2.1. In September 2015, Hibernate ORM 5.0.2 Final was released. It has improved bootstrapping, hibernate-java8, hibernate-spatial, Karaf support. In November 2018, Hibernate ORM 5.1.17 Final was released. This is the final release of the 5.1 series. In October 2018, Hibernate ORM 5.3 Final was released.
Many features originally in Hibernate were incorporated in the Java Persistence API, the replacement for entity beans in EJB 3.0. The EJB 3.0 specification relies heavily on the use of annotations (a feature added to the Java language with its 5.0 release) and convention over configuration to enable a much less verbose coding style.
OpenJPA is an open source implementation of the Java Persistence API specification. It is an object-relational mapping (ORM) solution for the Java language, which simplifies storing objects in databases. It is open-source software distributed under the Apache License 2.0.
Although this design pattern is applicable to most programming languages, most software with persistence needs, and most databases, it is traditionally associated with Java EE applications and with relational databases (accessed via the JDBC API because of its origin in Sun Microsystems' best practice guidelines [1] "Core J2EE Patterns".
Very briefly mentioned in the 2004 book Enterprise Java Development on a Budget: Leveraging Java Open Source by Brian Sam-Bodden and Christopher M Jud on page 386. [3] Explained in the 2015 book Learning NHibernate 4 by Suhas Chatekar on page 53 and 144–145. [4] Mentioned in the 2017 book NHibernate 4.x cookbook on page 35. [5]
This module enables the application with data persistence and retrieval between application and database management systems. JPA: Java Persistence API Unifies the tools for the ORM (Object-Relational Mapping). The default JPA implementation in Canigó 3 is Hibernate. Spring Data JPA makes it easy to easily implement JPA based repositories.