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/*
* 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.internal.strategy;
import net.sf.ehcache.Ehcache;
import net.sf.ehcache.Element;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.ehcache.internal.regions.EhcacheEntityRegion;
import org.hibernate.cache.spi.EntityRegion;
import org.hibernate.cache.spi.access.EntityRegionAccessStrategy;
import org.hibernate.cache.spi.access.SoftLock;
import org.hibernate.cfg.Settings;
/**
* JTA EntityRegionAccessStrategy.
*
* @author Chris Dennis
* @author Ludovic Orban
* @author Alex Snaps
*/
public class TransactionalEhcacheEntityRegionAccessStrategy extends AbstractEhcacheAccessStrategy
implements EntityRegionAccessStrategy {
private final Ehcache ehcache;
/**
* Construct a new entity region access strategy.
*
* @param region the Hibernate region.
* @param ehcache the cache.
* @param settings the Hibernate settings.
*/
public TransactionalEhcacheEntityRegionAccessStrategy(EhcacheEntityRegion region, Ehcache ehcache, Settings settings) {
super( region, settings );
this.ehcache = ehcache;
}
/**
* {@inheritDoc}
*/
public boolean afterInsert(Object key, Object value, Object version) {
return false;
}
/**
* {@inheritDoc}
*/
public boolean afterUpdate(Object key, Object value, Object currentVersion, Object previousVersion, SoftLock lock) {
return false;
}
/**
* {@inheritDoc}
*/
public Object get(Object key, long txTimestamp) throws CacheException {
try {
Element element = ehcache.get( key );
return element == null ? null : element.getObjectValue();
}
catch ( net.sf.ehcache.CacheException e ) {
throw new CacheException( e );
}
}
/**
* {@inheritDoc}
*/
public EntityRegion getRegion() {
return region;
}
/**
* {@inheritDoc}
*/
public boolean insert(Object key, Object value, Object version)
throws CacheException {
//OptimisticCache? versioning?
try {
ehcache.put( new Element( key, value ) );
return true;
}
catch ( net.sf.ehcache.CacheException e ) {
throw new CacheException( e );
}
}
/**
* {@inheritDoc}
*/
public SoftLock lockItem(Object key, Object version) throws CacheException {
return null;
}
/**
* {@inheritDoc}
*/
public boolean putFromLoad(Object key, Object value, long txTimestamp,
Object version, boolean minimalPutOverride) throws CacheException {
try {
if ( minimalPutOverride && ehcache.get( key ) != null ) {
return false;
}
//OptimisticCache? versioning?
ehcache.put( new Element( key, value ) );
return true;
}
catch ( net.sf.ehcache.CacheException e ) {
throw new CacheException( e );
}
}
/**
* {@inheritDoc}
*/
@Override
public void remove(Object key) throws CacheException {
try {
ehcache.remove( key );
}
catch ( net.sf.ehcache.CacheException e ) {
throw new CacheException( e );
}
}
/**
* {@inheritDoc}
*/
public void unlockItem(Object key, SoftLock lock) throws CacheException {
// no-op
}
/**
* {@inheritDoc}
*/
public boolean update(Object key, Object value, Object currentVersion,
Object previousVersion) throws CacheException {
try {
ehcache.put( new Element( key, value ) );
return true;
}
catch ( net.sf.ehcache.CacheException e ) {
throw new CacheException( e );
}
}
}
