/*
* JBoss, Home of Professional Open Source
* Copyright 2013 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*
*/
package org.infinispan.loaders.jpa;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.atomic.AtomicInteger;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
/**
*
* @author <a href="mailto:rtsang@redhat.com">Ray Tsang</a>
*
*/
public class EntityManagerFactoryRegistry {
private static final Log log = LogFactory.getLog(EntityManagerFactoryRegistry.class);
private Map<String, EntityManagerFactory> registry = new HashMap<String, EntityManagerFactory>();
public Map<String, AtomicInteger> usage = new HashMap<String, AtomicInteger>();
public EntityManagerFactory getEntityManagerFactory(String persistenceUnitName) {
synchronized (this) {
if (!registry.containsKey(persistenceUnitName)) {
EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnitName);
registry.put(persistenceUnitName, emf);
usage.put(persistenceUnitName, new AtomicInteger(1));
return emf;
} else {
incrementUsage(persistenceUnitName);
return registry.get(persistenceUnitName);
}
}
}
public void closeEntityManagerFactory(String persistenceUnitName) {
synchronized (this) {
if (!registry.containsKey(persistenceUnitName)) {
return;
}
int count = decrementUsage(persistenceUnitName);
if (count == 0) {
EntityManagerFactory emf = registry.remove(persistenceUnitName);
try {
if (emf.isOpen()) emf.close();
} catch (IllegalStateException e) {
log.warn("Entity manager factory was already closed: " + persistenceUnitName);
}
}
}
}
public void closeAll() {
synchronized (this) {
for (Entry<String, EntityManagerFactory> entry : registry.entrySet()) {
try {
if (entry.getValue().isOpen())
entry.getValue().close();
} catch (IllegalStateException e) {
log.warn("Entity manager factory was already closed: " + entry.getKey());
}
}
}
}
protected int incrementUsage(String persistenceUnitName) {
synchronized (this) {
return usage.get(persistenceUnitName).incrementAndGet();
}
}
protected int decrementUsage(String persistenceUnitName) {
synchronized (this) {
return usage.get(persistenceUnitName).decrementAndGet();
}
}
protected int getUsage(String persistenceUnitName) {
synchronized (this) {
return usage.get(persistenceUnitName).intValue();
}
}
}