com.phloc.db.jpa

Class AbstractPerRequestEntityManager

java.lang.Object

com.phloc.scopes.AbstractSingleton

com.phloc.scopes.singleton.RequestSingleton

com.phloc.db.jpa.AbstractPerRequestEntityManager

All Implemented Interfaces:

com.phloc.scopes.IScopeDestructionAware

@ThreadSafe
public abstract class AbstractPerRequestEntityManager
extends com.phloc.scopes.singleton.RequestSingleton

Abstract request singleton to handle a single EntityManager.
Note: this class does NOT implement IEntityManagerProvider by purpose, as this class should not be used as a direct callback parameter, because than only the object of this particular request is used.

Author:

Philip Helger

Field Summary

Fields

Modifier and Type	Field and Description
protected ReadWriteLock	m_aRWLock

Constructor Summary

Constructors

Constructor and Description
AbstractPerRequestEntityManager() Deprecated.

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract javax.persistence.EntityManager	createEntityManager() Create a new EntityManager when required.
javax.persistence.EntityManager	getEntityManager()
protected void	onDestroy()

Methods inherited from class com.phloc.scopes.singleton.RequestSingleton

getAllRequestSingletons, getRequestSingleton, getRequestSingletonIfInstantiated, isRequestSingletonInstantiated

Methods inherited from class com.phloc.scopes.AbstractSingleton

getAllSingletons, getSingleton, getSingletonIfInstantiated, getSingletonScopeKey, isDestroyed, isInDestruction, isInInstantiation, isInstantiated, isSingletonInstantiated, isUsableObject, onAfterInstantiation, onScopeDestruction, readAbstractSingletonFields, setDestroyed, setInDestruction, setInInstantiation, setInstantiated, toString, writeAbstractSingletonFields

Methods inherited from class java.lang.Object

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

Field Detail

m_aRWLock

protected final ReadWriteLock m_aRWLock

Constructor Detail

AbstractPerRequestEntityManager

@Deprecated
@UsedViaReflection
public AbstractPerRequestEntityManager()

Deprecated.

Method Detail

createEntityManager

@Nonnull
@IsLocked(value=WRITE)
protected abstract javax.persistence.EntityManager createEntityManager()

Create a new EntityManager when required.

Returns:

The created EntityManager. Never null.

getEntityManager

@Nonnull
public javax.persistence.EntityManager getEntityManager()

Returns:

The EntityManager to be used in this request. If it is the first request to an EntityManager in this request is created via createEntityManager(). Never null .

onDestroy

@OverridingMethodsMustInvokeSuper
protected void onDestroy()

Overrides:

onDestroy in class com.phloc.scopes.AbstractSingleton