Package org.datanucleus.store

Package handling the storage of classes to the datastore, and the management of the datastore.

See: Description

Interface Summary

Interface	Description
BackedSCOStoreManager	Interface implemented by a StoreManager when it supports "backed" SCO wrappers (i.e SCO fields have a connection to the datastore via a "backing store" to support more efficient connectivity).
Extent<T>	Extent of objects within DataNucleus.
FieldValues	Interface for field values.
NucleusConnection	Access to the underlying DataStore Connection.
NucleusSequence	Sequence of values.
ObjectReferencingStoreManager	Interface to be implemented by any StoreManager that provides objects that are actually created by the underlying datastore.
StoreManager	Interface defining management of a datastore.
StorePersistenceHandler	Interface defining persistence operations of a StoreManager.

Class Summary

Class	Description
AbstractExtent<T>	Abstract representation of a JDO Extent.
AbstractPersistenceHandler	Abstract representation of a persistence handler, to be extended by datastores own variant.
AbstractStoreManager	An abstract representation of a Store Manager.
DefaultCandidateExtent<T>	Extent that does a simple JDOQL query for the candidate with/without subclasses.
NucleusConnectionImpl	Representation of a datastore connection.
NucleusSequenceImpl	Basic generic implementation of a datastore sequence.
StoreData	Basic store information about an object that is stored in a datastore.
StoreDataManager	Manager for store information.
VersionHelper	Helper methods for handling optimistic versioning.

Enum Summary

Enum	Description
PersistenceBatchType	Enum for the type of a batched operation

Package org.datanucleus.store Description

Package handling the storage of classes to the datastore, and the management of the datastore. Each type of datastore will have its own subpackage (e.g org.datanucleus.store.rdbms) and its own StoreManager. When providing support for a new datastore you need to extend AbstractStoreManager.

The package also provides definition of StoreData - data held about each class and utilised by the StoreManager to perform its duties. This data is populated either at runtime when classes are requested, or when using an "auto-starter". There are several auto-start mechanisms. This package has ClassesAutoStarter and XMLAutoStarter.