/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.distcache;
import javax.cache.Cache;
/**
* Interface for a distributed cache.
*/
public interface ObjectCache<K,V> extends Cache<K,V>
{
/**
* Returns the extended entry
*/
public ExtCacheEntry<K,V> getExtCacheEntry(K key);
/**
* Updates the cache if the old value hash matches the current value.
* A null value for the old value hash only adds the entry if it's new
*
* @param key the key to compare
* @param version the version of the old value returned by getEntry
* @param value the new value
*
* @return true if the update succeeds, false if it fails
*/
public boolean compareAndPut(K key, long version, Object value);
/**
* Removes the entry from the cache if the current entry's version
* matches.
*/
public boolean compareAndRemove(K key, long version);
/**
* Returns true if the cache is closed
*/
public boolean isClosed();
//
// for statistics
//
public ExtCacheEntry<K,V> getStatCacheEntry(K key);
}