/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010-2011, 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.testing.cache;
import java.util.Comparator;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.spi.EntityRegion;
import org.hibernate.cache.spi.access.EntityRegionAccessStrategy;
import org.hibernate.cache.spi.access.SoftLock;
/**
* @author Strong Liu
*/
class ReadWriteEntityRegionAccessStrategy extends AbstractReadWriteAccessStrategy
implements EntityRegionAccessStrategy {
private final EntityRegionImpl region;
ReadWriteEntityRegionAccessStrategy(EntityRegionImpl region) {
this.region = region;
}
@Override
public boolean insert(Object key, Object value, Object version) throws CacheException {
return false;
}
@Override
public boolean update(Object key, Object value, Object currentVersion, Object previousVersion)
throws CacheException {
return false;
}
@Override
public void evict(Object key) throws CacheException {
}
@Override
public boolean afterInsert(Object key, Object value, Object version) throws CacheException {
try {
writeLock.lock();
Lockable item = (Lockable) region.get( key );
if ( item == null ) {
region.put( key, new Item( value, version, region.nextTimestamp() ) );
return true;
}
else {
return false;
}
}
finally {
writeLock.unlock();
}
}
@Override
public boolean afterUpdate(Object key, Object value, Object currentVersion, Object previousVersion, SoftLock lock)
throws CacheException {
try {
writeLock.lock();
Lockable item = (Lockable) region.get( key );
if ( item != null && item.isUnlockable( lock ) ) {
Lock lockItem = (Lock) item;
if ( lockItem.wasLockedConcurrently() ) {
decrementLock( key, lockItem );
return false;
}
else {
region.put( key, new Item( value, currentVersion, region.nextTimestamp() ) );
return true;
}
}
else {
handleLockExpiry( key, item );
return false;
}
}
finally {
writeLock.unlock();
}
}
@Override
protected BaseGeneralDataRegion getInternalRegion() {
return region;
}
@Override
protected boolean isDefaultMinimalPutOverride() {
return region.getSettings().isMinimalPutsEnabled();
}
@Override
Comparator getVersionComparator() {
return region.getCacheDataDescription().getVersionComparator();
}
@Override
public EntityRegion getRegion() {
return region;
}
}