Apache OpenJPA
Developer(s)Apache Software Foundation
Stable release
3.2.2 / March 16, 2022; 2 years ago (2022-03-16)[1]
RepositoryOpenJPA Repository
Written inJava
Operating systemCross-platform
Size21.8 MB (archived binary) / 11.7 MB (archived source)
TypeObject-relational mapping
LicenseApache License 2.0

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.


Kodo, a Java Data Objects implementation, was originally developed by SolarMetric, Inc in 2001. BEA Systems acquired SolarMetric in 2005, where Kodo was expanded to be an implementation of both the JDO (JSR 12)[2] and JPA (JSR 220)[3] specifications. In 2006, BEA donated a large part of the Kodo source code to the Apache Software Foundation under the name OpenJPA. The donated source code will be the core persistence engine of BEA Weblogic Server, IBM WebSphere, and the Geronimo Application Server.[4] In May 2007, OpenJPA graduated from the incubator to a top-level project and also passed Sun's Technology Compatibility Kit compliant with the Java Persistence API.[5]

See also


  1. ^ "Apache OpenJPA Downloads". 11 August 2010. Retrieved 27 September 2022.
  2. ^ Sun JCP JSR-12 Java Data Objects JDO Specification
  3. ^ Sun JCP JSR-220 Enterprise JavaBeansTM 3.0
  4. ^ Both BEA Weblogic Server and IBM WebSphere adopted OpenJPA for java persistence framework.[1]
  5. ^ OpenJPA Project Incubation Status