org.broadleafcommerce.common.util

Class EntityManagerAwareRunnable

java.lang.Object

org.broadleafcommerce.common.util.EntityManagerAwareRunnable

All Implemented Interfaces:

Runnable

public abstract class EntityManagerAwareRunnable
extends Object
implements Runnable

Provides a Runnable implementation that allows the execution of the run() method inside the context of a thread-bound EntityManager. This MUST be run in a background thread (typically a TaskExecutor; not a HTTP request thread, a EntityManagerFactoryAwareSystemEventConsumer, or a thread to which an EntityManager has already been bound).

Author:

Kelly Tisdell

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_ENTITY_MANAGER_NAME

Constructor Summary

Constructors

Constructor and Description
EntityManagerAwareRunnable() Constructs an abstract Runnable implementation that can be run in another thread.
EntityManagerAwareRunnable(Semaphore sem) Constructs an abstract Runnable implementation that can be run in another thread.

Method Summary

Modifier and Type	Method and Description
protected abstract void	executeInternal() Executes within the context of a thread-bound EntityManager.
protected org.springframework.context.ApplicationContext	getApplicationContext()
protected javax.persistence.EntityManager	getEntityManager()
protected javax.persistence.EntityManagerFactory	getEntityManagerFactory()
String	getEntityManagerName() The name of the persistence unit.
protected void	registerError(Exception e)
void	run() This method attempts to create / bind an EntityManager prior to execution.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ENTITY_MANAGER_NAME

public static final String DEFAULT_ENTITY_MANAGER_NAME

See Also:

Constant Field Values

Constructor Detail

EntityManagerAwareRunnable

public EntityManagerAwareRunnable()

Constructs an abstract Runnable implementation that can be run in another thread. Guarantees that an EntityManager is bound to the current thread.

EntityManagerAwareRunnable

public EntityManagerAwareRunnable(Semaphore sem)

Constructs an abstract Runnable implementation that can be run in another thread. Guarantees that an EntityManager is bound to the current thread. If a Semaphore is provided (not null), a single permit will be released prior to the completion of the run method.

Parameters:

sem -

Method Detail

run

public final void run()

This method attempts to create / bind an EntityManager prior to execution. This will also create and bind a BroadleafRequestContext, which should not already be bound to the background thread. If the run method is executed in a foreground thread, any existing BroadleafRequestContext bound to the thread will be returned to its previous state.

Specified by:

run in interface Runnable

executeInternal

protected abstract void executeInternal()
                                 throws Exception

Executes within the context of a thread-bound EntityManager. Helps avoid LazyInitializationExceptions and exceptions indicating that the Hibernate Session is closed.

Throws:

Exception

getEntityManagerName

public String getEntityManagerName()

The name of the persistence unit. Defaults to "blPU", the main persistence unit in Broadleaf.

Returns:

getEntityManagerFactory

protected javax.persistence.EntityManagerFactory getEntityManagerFactory()

getApplicationContext

protected org.springframework.context.ApplicationContext getApplicationContext()

getEntityManager

protected final javax.persistence.EntityManager getEntityManager()

registerError

protected void registerError(Exception e)