net.sf.ehcache.hibernate.regions.EhcacheDataRegion Maven / Gradle / Ivy
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/**
* 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.regions;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import net.sf.ehcache.Ehcache;
import net.sf.ehcache.Element;
import net.sf.ehcache.constructs.nonstop.NonStopCacheException;
import net.sf.ehcache.hibernate.nonstop.HibernateNonstopCacheExceptionHandler;
import net.sf.ehcache.hibernate.strategy.EhcacheAccessStrategyFactory;
import net.sf.ehcache.util.Timestamper;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.Region;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* An Ehcache specific data region implementation.
*
* This class is the ultimate superclass for all Ehcache Hibernate cache regions.
*
* @author Chris Dennis
* @author Greg Luck
* @author Emmanuel Bernard
* @author Abhishek Sanoujam
*/
public abstract class EhcacheDataRegion implements Region {
private static final Logger LOG = LoggerFactory.getLogger(EhcacheDataRegion.class);
private static final String CACHE_LOCK_TIMEOUT_PROPERTY = "net.sf.ehcache.hibernate.cache_lock_timeout";
private static final int DEFAULT_CACHE_LOCK_TIMEOUT = 60000;
/**
* Ehcache instance backing this Hibernate data region.
*/
protected final Ehcache cache;
/**
* The {@link EhcacheAccessStrategyFactory} used for creating various access strategies
*/
protected final EhcacheAccessStrategyFactory accessStrategyFactory;
private final int cacheLockTimeout;
/**
* Create a Hibernate data region backed by the given Ehcache instance.
*/
EhcacheDataRegion(EhcacheAccessStrategyFactory accessStrategyFactory, Ehcache cache, Properties properties) {
this.accessStrategyFactory = accessStrategyFactory;
this.cache = cache;
String timeout = properties.getProperty(CACHE_LOCK_TIMEOUT_PROPERTY, Integer.toString(DEFAULT_CACHE_LOCK_TIMEOUT));
this.cacheLockTimeout = Timestamper.ONE_MS * Integer.decode(timeout);
}
/**
* {@inheritDoc}
*/
public String getName() {
return cache.getName();
}
/**
* {@inheritDoc}
*/
public void destroy() throws CacheException {
try {
cache.getCacheManager().removeCache(cache.getName());
} catch (IllegalStateException e) {
//When Spring and Hibernate are both involved this will happen in normal shutdown operation.
//Do not throw an exception, simply log this one.
LOG.debug("This can happen if multiple frameworks both try to shutdown ehcache", e);
} catch (net.sf.ehcache.CacheException e) {
if (e instanceof NonStopCacheException) {
HibernateNonstopCacheExceptionHandler.getInstance().handleNonstopCacheException((NonStopCacheException) e);
} else {
throw new CacheException(e);
}
}
}
/**
* {@inheritDoc}
*/
public long getSizeInMemory() {
try {
return cache.calculateInMemorySize();
} catch (Throwable t) {
if (t instanceof NonStopCacheException) {
HibernateNonstopCacheExceptionHandler.getInstance().handleNonstopCacheException((NonStopCacheException) t);
}
return -1;
}
}
/**
* {@inheritDoc}
*/
public long getElementCountInMemory() {
try {
return cache.getMemoryStoreSize();
} catch (net.sf.ehcache.CacheException ce) {
if (ce instanceof NonStopCacheException) {
HibernateNonstopCacheExceptionHandler.getInstance().handleNonstopCacheException((NonStopCacheException) ce);
return -1;
} else {
throw new CacheException(ce);
}
}
}
/**
* {@inheritDoc}
*/
public long getElementCountOnDisk() {
try {
return cache.getDiskStoreSize();
} catch (net.sf.ehcache.CacheException ce) {
if (ce instanceof NonStopCacheException) {
HibernateNonstopCacheExceptionHandler.getInstance().handleNonstopCacheException((NonStopCacheException) ce);
return -1;
} else {
throw new CacheException(ce);
}
}
}
/**
* {@inheritDoc}
*/
public Map toMap() {
try {
Map result = new HashMap();
for (Object key : cache.getKeys()) {
Element e = cache.get(key);
if (e != null) {
result.put(key, e.getObjectValue());
}
}
return result;
} catch (Exception e) {
if (e instanceof NonStopCacheException) {
HibernateNonstopCacheExceptionHandler.getInstance().handleNonstopCacheException((NonStopCacheException) e);
return Collections.emptyMap();
} else {
throw new CacheException(e);
}
}
}
/**
* {@inheritDoc}
*/
public long nextTimestamp() {
return Timestamper.next();
}
/**
* {@inheritDoc}
*/
public int getTimeout() {
return cacheLockTimeout;
}
/**
* Return the Ehcache instance backing this Hibernate data region.
*/
public Ehcache getEhcache() {
return cache;
}
/**
* Returns true if this region contains data for the given key.
*
* This is a Hibernate 3.5 method.
*/
public boolean contains(Object key) {
return cache.isKeyInCache(key);
}
}