001// Copyright 2006, 2011 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.ioc.services;
016
017/**
018 * Event hub for notifications when the IOC {@link org.apache.tapestry5.ioc.Registry} shuts down.
019 */
020public interface RegistryShutdownHub
021{
022    /**
023     * Adds a listener for eventual notification.
024     */
025    void addRegistryShutdownListener(RegistryShutdownListener listener);
026
027    /**
028     * Adds a listener for eventual notification when the registry shuts down.  Runtime exceptions thrown by the listener
029     * will be logged and ignored.
030     *
031     * @since 5.3
032     */
033    void addRegistryShutdownListener(Runnable listener);
034
035    /**
036     * Adds a listener for eventual notification. RegistryWillShutdownListeners are notified before any standard listeners,
037     * and before service proxies and other parts of the Registry are  disabled. Runtime exceptions thrown by the listener will
038     * be logged and ignored.
039     *
040     * @since 5.3
041     */
042    void addRegistryWillShutdownListener(Runnable listener);
043}