001// Copyright 2008, 2010, 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.services;
016
017/**
018 * A service that allows listeners to be registered to learn about {@link org.apache.tapestry5.http.Link} creation.
019 */
020public interface LinkCreationHub
021{
022    /**
023     * Adds a listener. If the scope of the listener is per-thread, then it must be removed.
024     * 
025     * @param listener
026     */
027    void addListener(LinkCreationListener listener);
028
029    /**
030     * Adds a listener. If the scope of the listener is per-thread, then it must be removed.
031     * 
032     * @param listener
033     * @since 5.2.0
034     */
035    void addListener(LinkCreationListener2 listener);
036}