/*
* Copyright Terracotta, 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 org.ehcache.event;
/**
* Definition of the contract for implementing listeners to receive {@link CacheEvent}s from a
* {@link org.ehcache.Cache Cache}.
*
* @param <K> the key type for the observed cache
* @param <V> the value type for the observed cache
*/
public interface CacheEventListener<K, V> {
/**
* Invoked on {@link org.ehcache.event.CacheEvent CacheEvent} firing.
* <p>
* This method is invoked according to the {@link EventOrdering}, {@link EventFiring} and
* {@link EventType} requirements provided at listener registration time.
* <p>
* Any exception thrown from this listener will be swallowed and logged but will not prevent other listeners to run.
*
* @param event the actual {@code CacheEvent}
*/
void onEvent(CacheEvent<? extends K, ? extends V> event);
}