[CONF] OpenJPA: Index (page edited)

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Page Edited : openjpa : Index Index has been edited by Donald Woods (May 18, 2009). Change summary: use new Intro page for the Welcome text (View changes) Content: Welcome to Apache OpenJPA Apache OpenJPA is a Java Persistence API project at the Apache Software Foundation and can be used as a stand-alone POJO persistence layer or integrated into any JavaEE compliant container and many other lightweight frameworks, such as Tomcat and Spring. The 1.x releases (1.2.1 is the latest) are a feature-rich, Java Persistence API (JPA) 1.0 compliant implementation of the persistence part of Enterprise Java Beans 3.0. The upcoming 2.0 release (see JPA 2.0 Roadmap) will implement the JSR-317 Java Persistence 2.0 specification. All downloads and documentation on this site are made available under the terms of the Apache Software License. News Friday, May 15, 2009 OpenJPA 2.0 iteration 6 is complete The sixth iteration of OpenJPA 2.0 is complete! Content of this iteration is based upon the 03/13/2009 draft of the JPA 2.0 specification. This iteration contains these new features: With the completion of iteration 6, OpenJPA includes several additional JPA 2.0 (based on the 03/13/2009 spec draft) features. Here is a summary of the new features provided by OpenJPA: Query timeout detection for additional databases. Query timeouts are more accurately detected and reported in DB2, Oracle, SQL Server, and Informix. Support for scalar expressions in JPQL subqueries. Scalar expressions such as substring can now be used within a subquery. Support for explicit access types on persistent types. The persistence access method can now be specified on a per-type and field or method level. Spec related updates to OrderColumn and EntityManager methods. JPQL queries now support key/value paths as arguments to scalar functions. KEY() and VALUE() can now be used to indicate that a map key or value should be used as an argument to a scalar function. These new features are available in the latest nightly snapshot build. Be aware that the JPA 2.0 specification is not final so these features are subject to change. Many thanks to those who contributed to this iteration! If you'd like to be a contributor to the OpenJPA project, please post your interest on the dev mailing list or contact one of the active committers. -Jeremy Posted at 15 May @ 7:23 AM by Jeremy Bauer | 0 comments Wednesday, April 22, 2009 OpenJPA participates in Google Summer of Code 2009 Google Summer of Code (GSoC) is a global program that offers student developers stipends to write code for various open source software projects. More than 100 organizations including Apache Software Foundation are participating in this program that offers an excellent opportunity for the students all over the globe to actively involve in open source development. OpenJPA team had offered several projects on behalf of Apache Software Foundation to participate in GSoC 2009. Recently after an extensive ranking process, following projects had been selected: (the full list of selected projects can be seen here) Cross-partition Query in a Distributed Database Environment Adaptive Query Targeting in Distributed Database Environment Posted at 22 Apr @ 9:08 AM by Pinaki Poddar | 0 comments Thursday, April 9, 2009 OpenJPA 2.0 iteration 5 is complete The fifth iteration of OpenJPA 2.0 is complete! Content of this iteration is based upon the 03/13/2009 draft of the JPA 2.0 specification. This iteration contains these new features: Updated spec APIs and schemas based upon most current specification draft. New, unimplemented methods will throw an UnsupportedOperationException. Support new JPA LockModeType in find, lock and refresh methods in the EntityManager interface. A new "mixed" lock manager is introduced implementing the new mixed optimistic and pessimistic entity locking semantics. AttributeOverride enhanced to allow navigation of multiple levels of embeddables, use with map keys and values, and use with element collections. AssociationOverride enhanced to support specification of a join table and override of embeddables within relationships. Support for general and qualified identification variables in JQPL selections. KEY, ENTRY, and VALUE qualifiers can now be used within the SELECT clause. Lock and query timeout hint values can now be specified on applicable entity manager and query methods. Lock mode (including the new pessimistic lock modes) can be specified on query methods and named queries. This allows for fine-grained locking configuration at the query level. The unwrap method can be used to get an instance of OpenJPA entity manager and query interfaces. Single entities or an entity graph may be detached from the entity manager. Specifying the new cascade type of DETACH or ALL on relationships allows selective detachment of an entity graph. The third argument of the JPQL SUBSTRING function is now optional. JPQL queries have been enhanced to support the projection of element collections, nested embeddables, and relationships from embeddables. These new features are available in the latest nightly snapshot build. Be aware that the JPA 2.0 specification is not final so these features are subject to change. Many thanks to those who contributed to this iteration! If you'd like to be a contributor to the OpenJPA project, please post your interest on the dev mailing list or contact one of the active committers. -Jeremy Posted at 09 Apr @ 7:11 AM by Jeremy Bauer | 0 comments Monday, March 23, 2009 OpenJPA 1.2.1 released OpenJPA 1.2.1 is now available from http://openjpa.apache.org/downloads.html and from the ibiblio maven repository. Version 1.2.1 is a bugfix release which includes 30 notatble bug fixes and 10 improvements. The complete list of issues resolved can be found in the release notes at http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/RELEASE-NOTES.html. Thanks again to everyone who contributed to making this release a success! Posted at 23 Mar @ 6:10 PM by Michael Dick | 1 comment Resources Quick Start Guide to OpenJPA Obtaining OpenJPA OpenJPA Documentation Integration with Containers and Application Servers Enhancing entities with Maven2 OpenJPA can be browsed (and checked out using SVN from): http://svn.apache.org/repos/asf/openjpa/trunk/ Bugs and other issues can be reported at: http://issues.apache.org/jira/browse/OPENJPA Development questions can be addressed to: d...@openjpa.apache.org (archives) OpenJPA development resources

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