/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.clustering.ee;
/**
* Locates a value from the cache.
* @author Paul Ferraro
*/
public interface Locator<K, V> {
/**
* Locates the value in the cache with the specified identifier.
* @param id the cache entry identifier
* @return the value of the cache entry, or null if not found.
*/
V findValue(K id);
/**
* Returns the value for the specified key, if possible.
* @param key a cache key
* @return the value of the cache entry, or null if not found or unavailable.
*/
default V tryValue(K key) {
return this.findValue(key);
}
}