001// Copyright 2004, 2005 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.tapestry.services;
016
017import org.apache.tapestry.event.ResetEventListener;
018
019/**
020 * Service interface for a source of <b>reset</b> events; this events are used
021 * to inform other services that they should discard any cached data.
022 *
023 * @author Howard Lewis Ship
024 * @since 4.0
025 */
026public interface ResetEventHub
027{
028    public void addResetEventListener(ResetEventListener l);
029
030    public void removeResetEventListener(ResetEventListener l);
031
032        /**
033         * Notifies registered listeners.
034         */
035    public void fireResetEvent();
036}