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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or .
 */
package org.hibernate.engine.internal;

import java.io.Serializable;

import org.hibernate.cache.spi.access.RegionAccessStrategy;
import org.hibernate.engine.spi.SessionEventListenerManager;
import org.hibernate.engine.spi.SharedSessionContractImplementor;

/**
 * @author Steve Ebersole
 * @author Sanne Grinovero
 */
public final class CacheHelper {

	private CacheHelper() {
	}

	public static Serializable fromSharedCache(
			SharedSessionContractImplementor session,
			Object cacheKey,
			RegionAccessStrategy cacheAccessStrategy) {
		final SessionEventListenerManager eventListenerManager = session.getEventListenerManager();
		Serializable cachedValue = null;
		eventListenerManager.cacheGetStart();
		try {
			cachedValue = (Serializable) cacheAccessStrategy.get( session, cacheKey, session.getTimestamp() );
		}
		finally {
			eventListenerManager.cacheGetEnd( cachedValue != null );
		}
		return cachedValue;
	}

}