DataNucleus Access Platform 3.2.2

DataNucleus Access Platform is an open source software that provides data persistence and retrieval to a range of data stores using various APIs, with a range of query languages.

- APIs Supported: JDO, JPA
- Datastores Supported: RDBMS, db4o, LDAP, Excel, XML, NeoDatis, JSON
- Query Languages: JDOQL, JPQL, SQL, db4o Native, NucleusSQL, NeoDatis Criteria

Product's homepage

Requirements:

· Java 2 Standard Edition Runtime Environment

What's New in This Release: [ read full changelog ]

· Fix to in-memory evaluation when using a variable that has no possible value
· Move operation queue for SCOs to ExecutionContext so that it can control the whole flush process
· Disable ObjectProvider pooling since it currently causes issues when in a highly multithreaded environment
· Add check on attempted persistence of final fields
· JPA : allow for user overriding a JNDI datasource with a URL-based datasource
· RDBMS : fix to bulk update when setting fields to NULL
· RDBMS : Cater for fields of a type that have a TypeConverter but no Mapping defined, falling back to the TypeConverter
· Neo4j : Support for bulk delete
· MongoDB : Support for bulk delete
· HBase : Support for bulk delete

Version 3.2 includes the following major changes over 3.1:

· The enhancer and ASM are now merged into datanucleus-core
· L2 caching of embedded/serialised fields now defaults to ON
· ExecutionContext objects are now pooled, together with various other improvements for performance
· Enhancer now includes an option to enhance classes as detachable regardless of metadata
· Neo4j : now uses a single connection per PM/EM
· Neo4j : now supports bulk delete
· MongoDB : now uses a single connection per PM/EM
· MongoDB : now supports bulk delete
· HBase : supports various extensions for bloom filters, compression, in-memory etc (Nicolas Seyvet)
· HBase : now supports bulk delete
· RDBMS : support added for the Virtuoso database (Emmanuel Poitier)
· RDBMS : support added for Tomcat connection pool (Marshall Reeske)
· OSGi : improved deployability due to dependency version restrictions
· JPA : validated to work with JBoss 7 (thanks to Nicolas Seyvet and Scott Marlow)
· JPA : access of non-detached field will result in IllegalAccessException instead of the previous JDO exception
· JPA : support for JPA2.1 FROM "ON" clauses
· JPA : support for bulk usage of persist(), remove(), merge() and detach() (pass in Collection or array of entities)
· JPA : support for JPA2.1 "Generate Schema" feature
· If a type is supported to be persistent then it defaults to persistent now (no need to mark all non-standard typed fields as persistent).
· Add ability to disable the L2 cache on a PM/EM-basis where the PMF/EMF has it enabled.
· Cache : provides support for javax.cache v0.61
· Many bug fixes, and minor feature additions.