nl.knowledgeplaza.util.jpa
Class EntityManagerExtender

java.lang.Object
  nl.knowledgeplaza.util.jpa.EntityManagerExtender

All Implemented Interfaces:

InvocationHandler

Direct Known Subclasses:

EclipselinkEntityManagerExtender

public class EntityManagerExtender
extends Object
implements InvocationHandler

The disconnected usage of the EM requires that prior to storing or removing the toplevel entity a clear must be called, then the toplevel entity is stored/removed and is propogated down. In order to propogate down, any entity must be reachable. This works fine for storing, however removed entities are not reachable anymore and the clear has cleared the EM's list of removed entities. Because of this, removed subentities are in fact not removed, but where cleared by the clear call. To work around this, this wrapper was created: 1. keep a separate administration of removed enitit

Author:

toeu

Nested Class Summary

class	EntityManagerExtender.Action
static interface	EntityManagerExtender.EventListener
static class	EntityManagerExtender.EventListenerImpl

Field Summary

static Object	CLEAR_DELAYED_ACTIONS
static Object	EXECUTE_DELAYED_ACTIONS
static Object	EXECUTE_DELAYED_MERGE_ACTIONS
static Object	EXECUTE_DELAYED_PERSIST_ACTIONS
static Object	EXECUTE_DELAYED_REMOVE_ACTIONS
static Object	NO_CLEAR_DELAYED_ACTIONS
static String	SOURCECODE_VERSION Standard variable for determining version of a class file.

Constructor Summary

protected

EntityManagerExtender(javax.persistence.EntityManager em)

Method Summary

void	clearDelayedActions()
void	clearDelayedActionsHashcode()
static void	clearDelayedPersistActions(javax.persistence.EntityManager entityManager)
static void	clearWithoutClearingDelayedActions(javax.persistence.EntityManager entityManager)
void	executeDelayedActions()
static void	executeDelayedActions(javax.persistence.EntityManager entityManager)
void	executeDelayedMergeActions()
static void	executeDelayedMergeActions(javax.persistence.EntityManager entityManager)
void	executeDelayedPersistActions()
static void	executeDelayedPersistActions(javax.persistence.EntityManager entityManager)
void	executeDelayedRemoveActions()
static void	executeDelayedRemoveActions(javax.persistence.EntityManager entityManager)
static void	executeNextClearWithoutClearingDelayedActions(javax.persistence.EntityManager entityManager)
static void	executeNextClearWithoutClearingRemovedEntities(javax.persistence.EntityManager entityManager) Deprecated.
List<EntityManagerExtender.Action>	getDelayedActions() DelatedActions
javax.persistence.EntityManager	getEntityManager() EntityManager
Object	invoke(Object proxy, Method method, Object[] args)
static javax.persistence.EntityManager	wrap(javax.persistence.EntityManager em)

Methods inherited from class java.lang.Object

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

Field Detail

SOURCECODE_VERSION

public static final String SOURCECODE_VERSION

Standard variable for determining version of a class file.

See Also:

Constant Field Values

NO_CLEAR_DELAYED_ACTIONS

public static final Object NO_CLEAR_DELAYED_ACTIONS

CLEAR_DELAYED_ACTIONS

public static final Object CLEAR_DELAYED_ACTIONS

EXECUTE_DELAYED_ACTIONS

public static final Object EXECUTE_DELAYED_ACTIONS

EXECUTE_DELAYED_PERSIST_ACTIONS

public static final Object EXECUTE_DELAYED_PERSIST_ACTIONS

EXECUTE_DELAYED_MERGE_ACTIONS

public static final Object EXECUTE_DELAYED_MERGE_ACTIONS

EXECUTE_DELAYED_REMOVE_ACTIONS

public static final Object EXECUTE_DELAYED_REMOVE_ACTIONS

Constructor Detail

EntityManagerExtender

protected EntityManagerExtender(javax.persistence.EntityManager em)

Method Detail

getEntityManager

public javax.persistence.EntityManager getEntityManager()

EntityManager

getDelayedActions

public List<EntityManagerExtender.Action> getDelayedActions()

DelatedActions

clearDelayedActions

public void clearDelayedActions()

clearDelayedActionsHashcode

public void clearDelayedActionsHashcode()

executeDelayedActions

public void executeDelayedActions()

executeDelayedPersistActions

public void executeDelayedPersistActions()

executeDelayedMergeActions

public void executeDelayedMergeActions()

executeDelayedRemoveActions

public void executeDelayedRemoveActions()

invoke

public Object invoke(Object proxy,
                     Method method,
                     Object[] args)
              throws Throwable

Specified by:

invoke in interface InvocationHandler

Throws:

Throwable

wrap

public static javax.persistence.EntityManager wrap(javax.persistence.EntityManager em)

executeNextClearWithoutClearingDelayedActions

public static void executeNextClearWithoutClearingDelayedActions(javax.persistence.EntityManager entityManager)

clearWithoutClearingDelayedActions

public static void clearWithoutClearingDelayedActions(javax.persistence.EntityManager entityManager)

executeNextClearWithoutClearingRemovedEntities

public static void executeNextClearWithoutClearingRemovedEntities(javax.persistence.EntityManager entityManager)

Deprecated.

executeDelayedActions

public static void executeDelayedActions(javax.persistence.EntityManager entityManager)

clearDelayedPersistActions

public static void clearDelayedPersistActions(javax.persistence.EntityManager entityManager)

executeDelayedPersistActions

public static void executeDelayedPersistActions(javax.persistence.EntityManager entityManager)

executeDelayedMergeActions

public static void executeDelayedMergeActions(javax.persistence.EntityManager entityManager)

executeDelayedRemoveActions

public static void executeDelayedRemoveActions(javax.persistence.EntityManager entityManager)