/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.cache.ehcache;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicInteger;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.config.Configuration;
import org.jboss.logging.Logger;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.ehcache.internal.util.HibernateEhcacheUtils;
import org.hibernate.cfg.Settings;
/**
* A singleton EhCacheRegionFactory implementation.
*
* @author Chris Dennis
* @author Greg Luck
* @author Emmanuel Bernard
* @author Alex Snaps
*/
public class SingletonEhCacheRegionFactory extends AbstractEhcacheRegionFactory {
private static final EhCacheMessageLogger LOG = Logger.getMessageLogger(
EhCacheMessageLogger.class,
SingletonEhCacheRegionFactory.class.getName()
);
private static final AtomicInteger REFERENCE_COUNT = new AtomicInteger();
/**
* Constructs a SingletonEhCacheRegionFactory
*/
@SuppressWarnings("UnusedDeclaration")
public SingletonEhCacheRegionFactory() {
}
/**
* Constructs a SingletonEhCacheRegionFactory
*
* @param prop Not used
*/
@SuppressWarnings("UnusedDeclaration")
public SingletonEhCacheRegionFactory(Properties prop) {
super();
}
@Override
public void start(Settings settings, Properties properties) throws CacheException {
this.settings = settings;
try {
String configurationResourceName = null;
if ( properties != null ) {
configurationResourceName = (String) properties.get( NET_SF_EHCACHE_CONFIGURATION_RESOURCE_NAME );
}
if ( configurationResourceName == null || configurationResourceName.length() == 0 ) {
manager = CacheManager.create();
REFERENCE_COUNT.incrementAndGet();
}
else {
URL url;
try {
url = new URL( configurationResourceName );
}
catch (MalformedURLException e) {
if ( !configurationResourceName.startsWith( "/" ) ) {
configurationResourceName = "/" + configurationResourceName;
LOG.debugf(
"prepending / to %s. It should be placed in the root of the classpath rather than in a package.",
configurationResourceName
);
}
url = loadResource( configurationResourceName );
}
final Configuration configuration = HibernateEhcacheUtils.loadAndCorrectConfiguration( url );
manager = CacheManager.create( configuration );
REFERENCE_COUNT.incrementAndGet();
}
mbeanRegistrationHelper.registerMBean( manager, properties );
}
catch (net.sf.ehcache.CacheException e) {
throw new CacheException( e );
}
}
@Override
public void stop() {
try {
if ( manager != null ) {
if ( REFERENCE_COUNT.decrementAndGet() == 0 ) {
manager.shutdown();
}
manager = null;
}
}
catch (net.sf.ehcache.CacheException e) {
throw new CacheException( e );
}
}
}