1 /* 2 * $Header: /home/cvs/jakarta-commons/httpclient/src/test/org/apache/commons/httpclient/server/HttpRequestHandlerChain.java,v 1.1.2.3 2003/11/24 23:13:22 oglueck Exp $ 3 * $Revision: 1.1.2.3 $ 4 * $Date: 2003/11/24 23:13:22 $ 5 * 6 * ==================================================================== 7 * 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 1999-2003 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, if 26 * any, must include the following acknowlegement: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowlegement may appear in the software itself, 30 * if and wherever such third-party acknowlegements normally appear. 31 * 32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software 33 * Foundation" must not be used to endorse or promote products derived 34 * from this software without prior written permission. For written 35 * permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache" 38 * nor may "Apache" appear in their names without prior written 39 * permission of the Apache Group. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>. 59 * 60 * [Additional notices, if required by prior licensing conditions] 61 * 62 */ 63 64 package org.apache.commons.httpclient.server; 65 66 import java.io.IOException; 67 import java.util.ArrayList; 68 import java.util.Iterator; 69 import java.util.List; 70 71 /*** 72 * Maintains a chain of {@link HttpRequestHandler}s where new request-handlers 73 * can be prepended/appended. 74 * 75 * For each call to {@link #processRequest(ResponseWriter,SimpleHttpServerConnection,RequestLine,Header[])} 76 * we iterate over the chain from the start to the end, stopping as soon as a handler 77 * has claimed the output. 78 * 79 * @author Christian Kohlschuetter 80 */ 81 public class HttpRequestHandlerChain implements HttpRequestHandler { 82 private List subhandlers = new ArrayList(); 83 84 public HttpRequestHandlerChain() { 85 } 86 87 public synchronized void clear() { 88 subhandlers.clear(); 89 } 90 public synchronized void prependHandler(HttpRequestHandler handler) { 91 subhandlers.add(0,handler); 92 } 93 public synchronized void appendHandler(HttpRequestHandler handler) { 94 subhandlers.add(handler); 95 } 96 97 public synchronized boolean processRequest(SimpleHttpServerConnection conn) throws IOException { 98 99 for(Iterator it=subhandlers.iterator();it.hasNext();) { 100 HttpRequestHandler h = (HttpRequestHandler)it.next(); 101 boolean stop = h.processRequest(conn); 102 if (stop) { 103 return true; 104 } 105 } 106 return false; 107 } 108 }

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