org.qi4j.entitystore.gae
Class GaeEntityStoreUnitOfWork

java.lang.Object
  org.qi4j.entitystore.gae.GaeEntityStoreUnitOfWork

All Implemented Interfaces:

EntityStoreUnitOfWork

public class GaeEntityStoreUnitOfWork
extends Object
implements EntityStoreUnitOfWork

Constructor Summary

GaeEntityStoreUnitOfWork(com.google.appengine.api.datastore.DatastoreService datastore, String identity, ModuleSPI module)

Method Summary

StateCommitter	applyChanges()
void	discard()
EntityState	getEntityState(EntityReference reference) Get the EntityState for a given identity.
String	identity()
EntityState	newEntityState(EntityReference anIdentity, EntityDescriptor entityDescriptor) Create new EntityState for a given identity.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GaeEntityStoreUnitOfWork

public GaeEntityStoreUnitOfWork(com.google.appengine.api.datastore.DatastoreService datastore,
                                String identity,
                                ModuleSPI module)

Method Detail

identity

public String identity()

Specified by:

identity in interface EntityStoreUnitOfWork

newEntityState

public EntityState newEntityState(EntityReference anIdentity,
                                  EntityDescriptor entityDescriptor)
                           throws EntityStoreException

Description copied from interface: EntityStoreUnitOfWork

Create new EntityState for a given identity.

This should only create the EntityState and not insert it into any database, since that should occur during the EntityStoreUnitOfWork.applyChanges() call.

Specified by:

newEntityState in interface EntityStoreUnitOfWork

Parameters:

anIdentity - the identity of the entity

entityDescriptor - entity descriptor

Returns:

The new entity state.

Throws:

EntityStoreException - Thrown if creational fails.

getEntityState

public EntityState getEntityState(EntityReference reference)
                           throws EntityStoreException,
                                  EntityNotFoundException

Description copied from interface: EntityStoreUnitOfWork

Get the EntityState for a given identity. Throws EntityNotFoundException if the entity with given anIdentity is not found.

Specified by:

getEntityState in interface EntityStoreUnitOfWork

Parameters:

reference - The entity identity. This argument must not be null.

Returns:

Entity state given the composite descriptor and identity.

Throws:

EntityStoreException - thrown if retrieval failed.

EntityNotFoundException - if requested entity does not exist

applyChanges

public StateCommitter applyChanges()
                            throws EntityStoreException

Specified by:

applyChanges in interface EntityStoreUnitOfWork

Throws:

EntityStoreException

discard

public void discard()

Specified by:

discard in interface EntityStoreUnitOfWork