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/*
 * Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
 *
 * 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 com.hazelcast.hibernate.access;

import com.hazelcast.core.HazelcastException;
import com.hazelcast.hibernate.RegionCache;
import com.hazelcast.hibernate.region.AbstractTransactionalDataRegion;
import com.hazelcast.hibernate.region.HazelcastRegion;
import com.hazelcast.logging.ILogger;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.spi.access.SoftLock;

import java.util.Comparator;
import java.util.Properties;

/**
 * Base implementation for consistency guarantees
 *
 * @param  implementation type of HazelcastRegion
 */
public abstract class AbstractAccessDelegate implements AccessDelegate {

    protected final ILogger log;
    protected final T hazelcastRegion;
    protected final RegionCache cache;
    protected final Comparator versionComparator;

    protected AbstractAccessDelegate(final T hazelcastRegion, final Properties props) {
        this.hazelcastRegion = hazelcastRegion;
        log = hazelcastRegion.getLogger();
        if (hazelcastRegion instanceof AbstractTransactionalDataRegion) {
            this.versionComparator = ((AbstractTransactionalDataRegion) hazelcastRegion)
                    .getCacheDataDescription().getVersionComparator();
        } else {
            this.versionComparator = null;
        }
        cache = hazelcastRegion.getCache();
    }

    @Override
    public final T getHazelcastRegion() {
        return hazelcastRegion;
    }

    @Override
    public Object get(final Object key, final long txTimestamp) throws CacheException {
        try {
            return cache.get(key, txTimestamp);
        } catch (HazelcastException e) {
            if (log.isFinestEnabled()) {
                log.finest("Could not read from Cache[" + hazelcastRegion.getName() + "]: " + e.getMessage());
            }
            return null;
        }
    }

    @Override
    public boolean putFromLoad(final Object key, final Object value, final long txTimestamp,
                               final Object version) throws CacheException {
        try {
            return cache.put(key, value, txTimestamp, version);
        } catch (HazelcastException e) {
            if (log.isFinestEnabled()) {
                log.finest("Could not put into Cache[" + hazelcastRegion.getName() + "]: " + e.getMessage());
            }
            return false;
        }
    }

    @Override
    public boolean putFromLoad(final Object key, final Object value, final long txTimestamp,
                               final Object version, boolean minimalPuts) throws CacheException {
        return putFromLoad(key, value, txTimestamp, version);
    }

    @Override
    public void evict(final Object key) throws CacheException {
        cache.remove(key);
    }

    @Override
    public void evictAll() throws CacheException {
        cache.clear();
    }

    /**
     * NO-OP
     */
    @Override
    public SoftLock lockRegion() throws CacheException {
        return null;
    }

    @Override
    public void unlockRegion(final SoftLock lock) throws CacheException {
        cache.clear();
    }
}
    

    

    

                
 
            

    

                
 
            



    
    






    
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