/*
 * 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 CacheEvents from a Cache. 
Type parameters:
<K> – the key type for the observed cache
<V> – the value type for the observed cache/**
 * 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 CacheEvent firing. 
 This method is invoked according to the EventOrdering, EventFiring and EventType requirements provided at listener registration time. 

Any exception thrown from this listener will be swallowed and logged but will not prevent other listeners to run.
Params:
event – the actual CacheEvent/**
   * 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);

}