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持久层框架,DataNucleus Access Platform 3.0.5 发布

DataNucleus Access Platform 是一个兼容各种标准的 JAVA 数据持久化框架,完全兼容 JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, 和 JPA1 等 Java 标准。提供一个基于 REST 的API。通过它可以访问所有常见的数据库服务器,还包括 LDAP, NeoDatis, JSON, Excel/ODF spreadsheets, XML, BigTable, 和 HADOOP 数据库等.

3.0.5 版本改进记录:

  • make use of bulk load from L2 cache on use of PM.getObjectsById
  • Support for override of metadata for inherited fields/properties in embedded objects
  • Fix to in-memory query evaluation when an order clause is null
  • Some clean ups for logging
  • Fix to default value of "datanucleus.identifier.case" which was incorrect in 3.0.4
  • RDBMS : dont load all query results when running non-tx when we retain the connection
  • RDBMS : Support for use of sql-type when there are multiple possible for a jdbc-type
  • RDBMS : Support various mysql sql types such as LONGTEXT, MEDIUMBLOB etc
  • RDBMS : Some improved error messages
  • JSON : Support for enum fields
  • JSON : Support datastore identity
  • JSON : Support 1-1/1-N/M-N relations
  • JSON : Support field types that have long/String converters
  • JSON : Support versioning of objects
  • DB4O : Remove invalid import from OSGi info 

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