generaldataregion.java

一个Java持久层类库

package org.hibernate.cache;

/**
 * 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 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;
}