001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.wicket;
018
019
020import org.apache.wicket.core.request.handler.RenderPageRequestHandler;
021import org.apache.wicket.util.io.IClusterable;
022
023/**
024 * Interface to be implemented by {@link Component}s or {@link org.apache.wicket.behavior.Behavior}s
025 * that listen for requests from the client browser.
026 * 
027 * @author Jonathan Locke
028 */
029public interface IRequestListener extends IClusterable
030{
031
032        /**
033         * Does invocation of this listener render the page. 
034         * 
035         * @return default {@code true}, i.e. a {@link RenderPageRequestHandler} is schedules after invocation 
036         */
037        default boolean rendersPage()
038        {
039                return true;
040        }
041        
042        /**
043         * Called when a request is received.
044         */
045        void onRequest();
046}