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    
015    package org.apache.tapestry5.ioc.services;
016    
017    /**
018     * Event hub for notifications when the IOC {@link org.apache.tapestry5.ioc.Registry} shuts down.
019     */
020    public 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    }