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OpenJPA 2.0.0 Early Access 2

The Apache OpenJPA community is proud to provide an early access distribution of OpenJPA 2.0. This distribution is based on the 03/13/2009 draft of the JPA 2.0/JSR-317 specification. Included are many enhancements, fixes, and new functionality; giving developers early access to many key features of JPA 2.0. Some of the key features included in this distribution:

• JPA 2.0 API and persistence and orm schemas
• Support for nested embeddables and relationships within embeddables
• Support for collections of embeddables and basic types
• A programmatic query construction API based upon the 10/2008 revision of the JSR-317 specification
• A standardized Level 2 cache interface
• Enhanced map collection support
• Support for standard javax.persistence configuration properties
• A new prepared query cache for the caching of the SQL underlying JPQL and find queries
• Support for derived identities
• The ability to specify an order column on ordered collections
• Significant enhancements to JPQL
• Automatic orphan removal
• Support for individual entity detachment, including the ability to cascade
• Methods to retrieve active and all supported properties on the entity manager and entity manager factory
• New lock modes, including pessimistic locking on a per entity manager and query method level
• Support for query and lock timeout hints on a per entity manager and query method level
• Specification of explicit persistent access type on persistent classes and attributes
• Many more...

This early access distribution is based upon the contributions provided in development iterations through iteration 7, as defined in the JPA 2.0 Roadmap. The JPA 2.0 Roadmap contains a complete list of features and feature summaries, including what is on deck for future iterationsPut overview of EA2 here...

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