JDO v.2.1.1

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JDO 2.1.1 can be useful as it provides a standard way to access persistent data in databases. It uses plain old Java objects (POJO) to represent persistent data. The approach separates data manipulation (done by accessing Java data members in the Java domain objects) from database manipulation (done by calling the JDO interface methods). This separation of concerns leads to a high degree of independence of the Java view of data from the database view of the data. Interfaces are defined for the user's view of persistence:PersistenceManager: the component responsible for the life cycle of persistent instances, Query factory, and Transaction accessQuery: the component responsible for querying the datastore and returning persistent instances or valuesTransaction: the component responsible for initiating and completing transactionsMajor Features: Standards-DrivenChoice of datastoresSupport POJOsUsable in J2SEUsable in J2EEOut of box implementationSimple to unit testDynamic queriesComprehensive ORMPrimary Key generationSupports inherited objectsSchema CreationExisting schema

JDO 2.1.1 can be useful as it provides a ...

 
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