/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and/or its affiliates, and individual
* contributors by the @authors tag. See the copyright.txt in the
* distribution for a full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.seam.persistence;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import javax.enterprise.context.ContextNotActiveException;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import org.jboss.logging.Logger;
import org.jboss.seam.solder.bean.ContextualLifecycle;
import org.jboss.seam.solder.literal.DefaultLiteral;
/**
* SMPC lifecycle for SMPC's configured via @ExtensionManaged
*
* @author Stuart Douglas
*
*/
public class ManagedPersistenceContextBeanLifecycle implements ContextualLifecycle<EntityManager>
{
private static final Logger log = Logger.getLogger(ManagedPersistenceContextBeanLifecycle.class);
private final Class<?> proxyClass;
private final Constructor<?> proxyConstructor;
private volatile SeamPersistenceProvider persistenceProvider;
private volatile PersistenceContexts persistenceContexts;
protected final Annotation[] qualifiers;
protected final BeanManager manager;
private EntityManagerFactory emf;
private final List<SeamPersistenceProvider> persistenceProviders;
public ManagedPersistenceContextBeanLifecycle(Set<Annotation> qualifiers, ClassLoader loader, BeanManager manager, Set<Class<?>> additionalinterfaces, List<SeamPersistenceProvider> persistenceProviders)
{
this.manager = manager;
this.persistenceProviders = new ArrayList<SeamPersistenceProvider>(persistenceProviders);
Class<?>[] interfaces = new Class[additionalinterfaces.size() + 3];
int count = 0;
for (Class<?> i : additionalinterfaces)
{
interfaces[count++] = i;
}
interfaces[count++] = EntityManager.class;
interfaces[count++] = Serializable.class;
interfaces[count++] = ManagedPersistenceContext.class;
proxyClass = Proxy.getProxyClass(loader, interfaces);
try
{
proxyConstructor = proxyClass.getConstructor(InvocationHandler.class);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
this.qualifiers = new Annotation[qualifiers.size()];
int i = 0;
for (Annotation a : qualifiers)
{
this.qualifiers[i++] = a;
}
}
/**
* creates the proxy
*/
public EntityManager create(Bean<EntityManager> bean, CreationalContext<EntityManager> arg0)
{
try
{
EntityManagerFactory emf = getEntityManagerFactory();
EntityManager entityManager = emf.createEntityManager();
entityManager = getPersistenceProvider(entityManager).proxyEntityManager(entityManager);
PersistenceContexts persistenceContexts = null;
try
{
persistenceContexts = getPersistenceContexts();
}
catch (ContextNotActiveException e)
{
// it's null already
}
ManagedPersistenceContextProxyHandler handler = new ManagedPersistenceContextProxyHandler(entityManager, manager, bean.getQualifiers(), persistenceContexts, getPersistenceProvider(entityManager));
EntityManager proxy = (EntityManager) proxyConstructor.newInstance(handler);
arg0.push(proxy);
getPersistenceProvider(entityManager).setFlushMode(proxy, getFlushMode());
manager.fireEvent(new SeamManagedPersistenceContextCreated(entityManager), qualifiers);
return proxy;
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
private FlushModeType getFlushMode()
{
try
{
return getPersistenceContexts().getFlushMode();
}
catch (ContextNotActiveException e)
{
// TODO Set the default flush mode for the app
return FlushModeType.AUTO;
}
}
public void destroy(Bean<EntityManager> bean, EntityManager em, CreationalContext<EntityManager> arg1)
{
((ManagedPersistenceContext) em).closeAfterTransaction();
arg1.release();
try
{
getPersistenceContexts().untouch((ManagedPersistenceContext) em);
}
catch (ContextNotActiveException e)
{
log.debug("Could not untouch PersistenceContext as conversation scope not active");
}
}
private PersistenceContexts getPersistenceContexts()
{
if (persistenceContexts == null)
{
synchronized (this)
{
if (persistenceContexts == null)
{
Bean<PersistenceContexts> bean = (Bean) manager.resolve(manager.getBeans(PersistenceContexts.class, DefaultLiteral.INSTANCE));
if (bean == null)
{
throw new RuntimeException("Could not find PersistenceContexts bean");
}
CreationalContext<PersistenceContexts> ctx = manager.createCreationalContext(bean);
persistenceContexts = (PersistenceContexts) manager.getReference(bean, PersistenceContexts.class, ctx);
}
}
}
return persistenceContexts;
}
private SeamPersistenceProvider getPersistenceProvider(EntityManager em)
{
if (persistenceProvider == null)
{
synchronized (this)
{
if (persistenceProvider == null)
{
for (SeamPersistenceProvider i : persistenceProviders)
{
if (i.isCorrectProvider(em))
{
persistenceProvider = i;
break;
}
}
}
}
}
return persistenceProvider;
}
/**
* lazily resolve the relevant EMF
*/
protected EntityManagerFactory getEntityManagerFactory()
{
if (emf == null)
{
Bean<EntityManagerFactory> bean = (Bean) manager.resolve(manager.getBeans(EntityManagerFactory.class, qualifiers));
if (bean == null)
{
throw new RuntimeException("Could not find EntityManagerFactory bean with qualifiers" + Arrays.toString(qualifiers));
}
CreationalContext<EntityManagerFactory> ctx = manager.createCreationalContext(bean);
emf = (EntityManagerFactory) manager.getReference(bean, EntityManagerFactory.class, ctx);
}
return emf;
}
}