org.hibernate.cache.redis.hibernate4.strategy.AbstractReadWriteRedisAccessStrategy Maven / Gradle / Ivy
/*
* Copyright 2002-2015 the original author or authors.
*
* 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 org.hibernate.cache.redis.hibernate4.strategy;
import lombok.extern.slf4j.Slf4j;
import org.hibernate.cache.redis.hibernate4.regions.RedisTransactionalDataRegion;
import org.hibernate.cache.spi.access.SoftLock;
import org.hibernate.cfg.Settings;
import java.util.Comparator;
/**
* Superclass for all Redis specific read/write AccessStrategy implementations.
*
* @param the type of the enclosed cache region
* @author [email protected]
* @since 13. 4. 5. 오후 10:07
*/
@Slf4j
public class AbstractReadWriteRedisAccessStrategy
extends AbstractRedisAccessStrategy {
private final Comparator versionComparator;
/**
* Creates a read/write cache access strategy around the given cache region.
*/
public AbstractReadWriteRedisAccessStrategy(T region, Settings settings) {
super(region, settings);
this.versionComparator = region.getCacheDataDescription().getVersionComparator();
}
/**
* Returns null if the item is not readable. Locked items are not readable, nor are items created
* after the start of this transaction.
*/
public final Object get(Object key, long txTimestamp) {
return region.get(key);
}
@Override
public final boolean putFromLoad(Object key,
Object value,
long txTimestamp,
Object version,
boolean minimalPutOverride) {
region.put(key, value);
return true;
}
/**
* Soft-lock a cache item.
*/
public final SoftLock lockItem(Object key, Object version) {
region.remove(key);
return null;
}
/**
* Soft-unlock a cache item.
*/
public final void unlockItem(Object key, SoftLock lock) {
region.remove(key);
}
}