/**
* Copyright 2003-2010 Terracotta, Inc.
*
* 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 net.sf.ehcache.hibernate;
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.hibernate.cache.CacheException;
import org.hibernate.cfg.Settings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A singleton EhCacheRegionFactory implementation.
*
* @author Chris Dennis
* @author Greg Luck
* @author Emmanuel Bernard
*/
public class SingletonEhCacheRegionFactory extends AbstractEhcacheRegionFactory {
private static final Logger LOG = LoggerFactory.getLogger(SingletonEhCacheRegionFactory.class);
private static final AtomicInteger REFERENCE_COUNT = new AtomicInteger();
/**
* Returns a representation of the singleton EhCacheRegionFactory
*/
public SingletonEhCacheRegionFactory(Properties prop) {
super();
}
/**
* {@inheritDoc}
*/
public void start(Settings settings, Properties properties) throws CacheException {
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.debug("prepending / to {}. It should be placed in the root of the classpath rather than in a package.",
configurationResourceName);
}
url = loadResource(configurationResourceName);
}
Configuration configuration = HibernateUtil.loadAndCorrectConfiguration(url);
manager = CacheManager.create(configuration);
REFERENCE_COUNT.incrementAndGet();
}
mbeanRegistrationHelper.registerMBean(manager, properties);
} catch (net.sf.ehcache.CacheException e) {
throw new CacheException(e);
}
}
/**
* {@inheritDoc}
*/
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);
}
}
}