/*
* Copyright (C) 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.concurrency;
/**
*
* @param <K>
* @param <V>
*/
public interface EvictionListener<K, V> {
/**
* notifies a listener that a key/value pair has been evicted. No guarantee
* is made that the key/value pair is not re-inserted by the time this
* occurs (ie, an eviction occurred in the past)
* @param key key that was evicted
* @param value value evicted. May be null in the case that either null
* was inserted, or an exception was thrown producing the value
*/
void evicted(K key, V value);
}