org.hibernate.cache.redis.strategy.ReadOnlyRedisEntityRegionAccessStrategy Maven / Gradle / Ivy

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/*
 * Copyright 2011-2013 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.strategy;

import lombok.extern.slf4j.Slf4j;
import org.hibernate.cache.redis.regions.RedisEntityRegion;
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;

/**
 * ReadOnlyRedisEntityRegionAccessStrategy
 *
 * @author [email protected]
 * @since 13. 4. 5. 오후 11:12
 */
@Slf4j
public class ReadOnlyRedisEntityRegionAccessStrategy
        extends AbstractRedisAccessStrategy
        implements EntityRegionAccessStrategy {

    public ReadOnlyRedisEntityRegionAccessStrategy(RedisEntityRegion region, Settings settings) {
        super(region, settings);
    }

    @Override
    public EntityRegion getRegion() {
        return region;
    }

    @Override
    public Object get(Object key, long txTimestamp) {
        return region.get(key);
    }

    @Override
    public boolean putFromLoad(Object key,
                               Object value,
                               long txTimestamp,
                               Object version,
                               boolean minimalPutOverride) {
        if (minimalPutOverride && region.contains(key)) {
            return false;
        }
        region.put(key, value);
        return true;
    }

    @Override
    public SoftLock lockItem(Object key, Object version) {
        return null;
    }

    @Override
    public void unlockItem(Object key, SoftLock lock) {
        evict(key);
    }


    @Override
    public boolean insert(Object key, Object value, Object version) {
        return false;
    }

    @Override
    public boolean afterInsert(Object key, Object value, Object version) {
        region.put(key, value);
        return true;
    }

    @Override
    public boolean update(Object key, Object value, Object currentVersion, Object previousVersion) {
        throw new UnsupportedOperationException("Can't write to a readonly object");
    }

    @Override
    public boolean afterUpdate(Object key,
                               Object value,
                               Object currentVersion,
                               Object previousVersion,
                               SoftLock lock) {
        throw new UnsupportedOperationException("Can't write to a readonly object");
    }
}