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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.impl.bridge;
import org.hibernate.cache.access.CollectionRegionAccessStrategy;
import org.hibernate.cache.access.SoftLock;
import org.hibernate.cache.CacheConcurrencyStrategy;
import org.hibernate.cache.CollectionRegion;
import org.hibernate.cache.CacheException;
import org.hibernate.cfg.Settings;
/**
* Adapter specifically bridging {@link CollectionRegionAccessStrategy} to {@link CacheConcurrencyStrategy}.
*
* @author Steve Ebersole
*/
public class CollectionAccessStrategyAdapter implements CollectionRegionAccessStrategy {
private final CollectionRegion region;
private final CacheConcurrencyStrategy ccs;
private final Settings settings;
public CollectionAccessStrategyAdapter(CollectionRegion region, CacheConcurrencyStrategy ccs, Settings settings) {
this.region = region;
this.ccs = ccs;
this.settings = settings;
}
public CollectionRegion getRegion() {
return region;
}
public Object get(Object key, long txTimestamp) throws CacheException {
return ccs.get( key, txTimestamp );
}
public boolean putFromLoad(Object key, Object value, long txTimestamp, Object version) throws CacheException {
return putFromLoad( key, value, txTimestamp, version, settings.isMinimalPutsEnabled() );
}
public boolean putFromLoad(
Object key,
Object value,
long txTimestamp,
Object version,
boolean minimalPutOverride) throws CacheException {
return ccs.put( key, value, txTimestamp, version, region.getCacheDataDescription().getVersionComparator(), minimalPutOverride );
}
public SoftLock lockItem(Object key, Object version) throws CacheException {
return ccs.lock( key, version );
}
public SoftLock lockRegion() throws CacheException {
// no-op; CCS did not have such a concept
return null;
}
public void unlockItem(Object key, SoftLock lock) throws CacheException {
ccs.release( key, lock );
}
public void unlockRegion(SoftLock lock) throws CacheException {
// again, CCS did not have such a concept; but a reasonable
// proximity is to clear the cache after transaction *as long as*
// the underlying cache is not JTA aware.
if ( !region.isTransactionAware() ) {
ccs.clear();
}
}
public void remove(Object key) throws CacheException {
ccs.evict( key );
}
public void removeAll() throws CacheException {
// again, CCS did not have such a concept; however a reasonable
// proximity is to clear the cache. For non-transaction aware
// caches, we will also do a clear at the end of the transaction
ccs.clear();
}
public void evict(Object key) throws CacheException {
ccs.remove( key );
}
public void evictAll() throws CacheException {
ccs.clear();
}
public void destroy() {
ccs.destroy();
}
}