package org.apache.commons.jcs.engine.behavior;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/**
* ShutdownObservers can observe ShutdownObservable objects.
* The CacheManager is the primary observable that this is intended for.
* <p>
* Most shutdown operations will occur outside this framework for now. The initial
* goal is to allow background threads that are not reachable through any reference
* that the cache manager maintains to be killed on shutdown.
* <p>
* Perhaps the composite cache itself should be the observable object.
* It doesn't make much of a difference. There are some problems with
* region by region shutdown. Some auxiliaries are local. They will
* need to track when every region has shutdown before doing things like
* closing the socket with a lateral.
* <p>
* @author Aaron Smuts
*
*/
public interface IShutdownObservable
{
/**
* Registers an observer with the observable object.
* @param observer
*/
void registerShutdownObserver( IShutdownObserver observer );
/**
* Deregisters the observer with the observable.
*
* @param observer
*/
void deregisterShutdownObserver( IShutdownObserver observer );
}