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/**
* Copyright (c) 2013-2019 Nikita Koksharov
*
* 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.
*/
/*
* 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.redisson.hibernate.strategy;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.spi.EntityRegion;
import org.hibernate.cache.spi.GeneralDataRegion;
import org.hibernate.cache.spi.access.EntityRegionAccessStrategy;
import org.hibernate.cache.spi.access.SoftLock;
import org.hibernate.cfg.Settings;
import org.redisson.api.RLock;
import org.redisson.api.RMapCache;
/**
*
* @author Nikita Koksharov
* @author Strong Liu
*
*/
public class ReadWriteEntityRegionAccessStrategy extends AbstractReadWriteAccessStrategy implements EntityRegionAccessStrategy {
public ReadWriteEntityRegionAccessStrategy(Settings settings, GeneralDataRegion region, RMapCache mapCache) {
super(settings, region, mapCache);
}
@Override
public EntityRegion getRegion() {
return (EntityRegion) region;
}
@Override
public boolean insert(Object key, Object value, Object version) throws CacheException {
return false;
}
@Override
public boolean afterInsert(Object key, Object value, Object version) throws CacheException {
RLock writeLock = mapCache.getReadWriteLock(key).writeLock();
writeLock.lock();
try {
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 update(Object key, Object value, Object currentVersion, Object previousVersion)
throws CacheException {
return false;
}
@Override
public boolean afterUpdate(Object key, Object value, Object currentVersion, Object previousVersion, SoftLock lock)
throws CacheException {
RLock writeLock = mapCache.getReadWriteLock(key).writeLock();
writeLock.lock();
try {
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();
}
}
}
