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}