/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.cache.spi;

import org.hibernate.cache.CacheException;

/**
 * Contract for general-purpose cache regions.
 *
 * @author Steve Ebersole
 */
public interface GeneralDataRegion extends Region {

	/**
	 * Get an item from the cache.
	 *
	 * @param key The key of the item to be retrieved.
	 * @return the cached object or <tt>null</tt>
	 * @throws org.hibernate.cache.CacheException Indicates a problem accessing the item or region.
	 */
	public Object get(Object key) throws CacheException;

	/**
	 * Put an item into the cache.
	 *
	 * @param key The key under which to cache the item.
	 * @param value The item to cache.
	 * @throws CacheException Indicates a problem accessing the region.
	 */
	public void put(Object key, Object value) throws CacheException;

	/**
	 * Evict an item from the cache immediately (without regard for transaction
	 * isolation).
	 *
	 * @param key The key of the item to remove
	 * @throws CacheException Indicates a problem accessing the item or region.
	 */
	public void evict(Object key) throws CacheException;

	/**
	 * Evict all contents of this particular cache region (without regard for transaction
	 * isolation).
	 *
	 * @throws CacheException Indicates problem accessing the region.
	 */
	public void evictAll() throws CacheException;
}