Apache JDO release latest revision of the Java Data Objects specification, API and TCK
Java DataObjects (JDO) provides standardised persistence for Java objects allowing persistence to a full range of datastores (RDBMS, ODBMS, XML, LDAP, etc).
JDO2.2 is a revision to the JDO2 specification providing :-
- Support for specification of the transaction isolation level
- Dynamic Fetch Groups (via API)
- Ability to specify a datastore as "read-only" so preventing any writes
- Support for choosing which classes/fields are put in the L2 cache
DataNucleus AccessPlatform 1.0 is the "reference implementation" for JDO2.2. This release of the JDO spec is likely the last one that will support JDK1.3/1.4.
JDO2.3 is open to discussion and interested parties should contact Apache JDO if they have any particular requirements