The Persistence Manager
Chapter 1 describes in general terms, the implicit and explicit persistence services that JDO provides. The application does not take any special steps to invoke the implicit services. JDO provides them automatically and transparently to all objects whose classes implement the PersistenceCapable interface. On the other hand, to invoke the explicit services, the application calls the JDO API at the appropriate points in its code. Most of the explicit persistence services are contained in the PersistenceManager interface. Those related to transactions are found in the Transaction interface. This chapter discusses the PersistenceManager interface. Chapter 4 describes the Transaction interface.
KeywordsApplication Data Identity Class Query Object Persistent State Transient Method
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