持久層框架 DataNucleus Access Platform
DataNucleus Access Platform 是一個兼容各種標準的 Java 數據持久化框架，完全兼容 JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, 和 JPA1 等 Java 標準。提供一個基于 REST 的API。通過它可以訪問所有常見的數據庫服務器，還包括 LDAP, NeoDatis, JSON, Excel/ODF spreadsheets, XML, BigTable, 和 HADOOP 數據庫等.
DataNucleus Access Platform 3.0.4 ("Newton") 發布了，DataNucleus 提供了 Java 對象到數據庫、XML、Excel 和 db4o 的映射框架，3.0.4 版本主要改進：
- AccessPlatform : drop support for ZIP distributions for db4o and NeoDatis datastores
- AccessPlatform : add Maven POM artifacts for main AccessPlatform combinations (JDO-RDBMS, JPA-RDBMS, etc)
- Add ability to turn off Metadata support for XML or annotations, for performance
- Parameterise all persistence property names for easy referencing
- Split support for java.awt geometry types into a separate plugin, and complete support for persisting in String form
- Improve startup process so that NucleusContext, PluginManager are more modular, and so that JPA doesn't create multiple working contexts
- SchemaTool : improvement to class resolution process when not forking the JVM process
- Support for Atomikos transaction manager (Matthew Adams)
- Support batching of L2 cache updates
- Support L2 cache "mode" to determine which classes are cacheable (JPA "sharedCache.Mode")
- RDBMS : Improvement to handling of result classes when single column selected
- RDBMS : Support for embedded inherited objects (likely part of JDO3.1/3.2)
- MongoDB : fix to handling of bidirectional relations when using IDENTITY strategy
- HBase : fix problem in table management
- Cache : support for javax.cache v0.3+ (in datanucleus-cache v3.1.0, while support for the earlier version is in datanucleus-cache v3.0)
- Eclipse : update to the plugin to move API to general preferences and drop the enhancer "type" since it was not being used
可從 DataNucleus community site. 下載
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