/**
* 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.URL;
import net.sf.ehcache.Ehcache;
import net.sf.ehcache.config.CacheConfiguration;
import net.sf.ehcache.config.Configuration;
import net.sf.ehcache.config.ConfigurationFactory;
import net.sf.ehcache.config.NonstopConfiguration;
import net.sf.ehcache.config.TerracottaConfiguration;
import net.sf.ehcache.config.TerracottaConfiguration.ValueMode;
import net.sf.ehcache.config.TimeoutBehaviorConfiguration.TimeoutBehaviorType;
import org.hibernate.cache.CacheException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author Chris Dennis
* @author Abhishek Sanoujam
*/
public final class HibernateUtil {
private static final Logger LOG = LoggerFactory.getLogger(HibernateUtil.class);
private HibernateUtil() { }
/**
* Create a cache manager configuration from the supplied url, correcting it for Hibernate compatibility.
* <p>
* Currently correcting for Hibernate compatibility means simply switching any identity based value modes to serialization.
*/
static Configuration loadAndCorrectConfiguration(URL url) {
Configuration config = ConfigurationFactory.parseConfiguration(url);
if (config.getDefaultCacheConfiguration().isTerracottaClustered()) {
if (ValueMode.IDENTITY.equals(config.getDefaultCacheConfiguration().getTerracottaConfiguration().getValueMode())) {
LOG.warn("The default cache value mode for this Ehcache configuration is \"identity\". This is incompatible with clustered "
+ "Hibernate caching - the value mode has therefore been switched to \"serialization\"");
config.getDefaultCacheConfiguration().getTerracottaConfiguration().setValueMode(ValueMode.SERIALIZATION.name());
}
setupHibernateTimeoutBehavior(config.getDefaultCacheConfiguration().getTerracottaConfiguration().getNonstopConfiguration());
}
for (CacheConfiguration cacheConfig : config.getCacheConfigurations().values()) {
if (cacheConfig.isTerracottaClustered()) {
if (ValueMode.IDENTITY.equals(cacheConfig.getTerracottaConfiguration().getValueMode())) {
LOG.warn("The value mode for the {0} cache is \"identity\". This is incompatible with clustered Hibernate caching - "
+ "the value mode has therefore been switched to \"serialization\"", cacheConfig.getName());
cacheConfig.getTerracottaConfiguration().setValueMode(ValueMode.SERIALIZATION.name());
}
setupHibernateTimeoutBehavior(cacheConfig.getTerracottaConfiguration().getNonstopConfiguration());
}
}
return config;
}
private static void setupHibernateTimeoutBehavior(NonstopConfiguration nonstopConfig) {
nonstopConfig.getTimeoutBehavior().setType(TimeoutBehaviorType.EXCEPTION.getTypeName());
}
/**
* Validates that the supplied Ehcache instance is valid for use as a Hibernate cache.
*/
static void validateEhcache(Ehcache cache) throws CacheException {
CacheConfiguration cacheConfig = cache.getCacheConfiguration();
if (cacheConfig.isTerracottaClustered()) {
TerracottaConfiguration tcConfig = cacheConfig.getTerracottaConfiguration();
switch (tcConfig.getValueMode()) {
case IDENTITY:
throw new CacheException("The clustered Hibernate cache " + cache.getName() + " is using IDENTITY value mode.\n"
+ "Identity value mode cannot be used with Hibernate cache regions.");
case SERIALIZATION:
default:
// this is the recommended valueMode
break;
}
}
}
}