net.oschina.j2cache.hibernate4.strategy.ReadOnlyJ2CacheEntityRegionAccessStrategy Maven / Gradle / Ivy
/**
* Copyright (c) 2015-2017.
*
* 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.oschina.j2cache.hibernate4.strategy;
import net.oschina.j2cache.hibernate4.regions.J2CacheEntityRegion;
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;
import org.hibernate.cfg.Settings;
public class ReadOnlyJ2CacheEntityRegionAccessStrategy extends AbstractJ2CacheAccessStrategy implements EntityRegionAccessStrategy {
public ReadOnlyJ2CacheEntityRegionAccessStrategy(J2CacheEntityRegion region, Settings settings) {
super(region, settings);
}
@Override
public EntityRegion getRegion() {
return region();
}
@Override
public Object get(Object key, long txTimestamp) throws CacheException {
return region().get(key);
}
@Override
public boolean putFromLoad(Object key, Object value, long txTimestamp, Object version, boolean minimalPutOverride)
throws CacheException {
if (minimalPutOverride && region().contains(key)) {
return false;
} else {
region().put(key, value);
return true;
}
}
@Override
public SoftLock lockItem(Object key, Object version) throws UnsupportedOperationException {
return null;
}
@Override
public void unlockItem(Object key, SoftLock lock) throws CacheException {
evict(key);
}
@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 {
region().put(key, value);
return true;
}
@Override
public boolean update(Object key, Object value, Object currentVersion, Object previousVersion) throws UnsupportedOperationException {
throw new UnsupportedOperationException("Can't write to a readonly object");
}
@Override
public boolean afterUpdate(Object key, Object value, Object currentVersion, Object previousVersion, SoftLock lock) throws UnsupportedOperationException {
throw new UnsupportedOperationException("Can't write to a readonly object");
}
}