1 /* 2 * $Header: /home/cvs/jakarta-commons/httpclient/src/test/org/apache/commons/httpclient/server/StreamProxy.java,v 1.1.2.1 2003/12/05 21:02:52 oglueck Exp $ 3 * $Revision: 1.1.2.1 $ 4 * $Date: 2003/12/05 21:02:52 $ 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.io.InputStream; 68 import java.io.OutputStream; 69 70 /*** 71 * Pipes all data of an input stream through to an output stream asynchronously. 72 * Instances of this class are thread safe. 73 * 74 * @author Ortwin Glueck 75 */ 76 class StreamProxy { 77 private InputStream in; 78 private OutputStream out; 79 private Pump pump = new Pump(); 80 private Thread pumpThread = new Thread(pump, "Stream copier"); 81 private int state = 0; 82 83 public StreamProxy(InputStream in, OutputStream out) { 84 this.in = in; 85 this.out = out; 86 } 87 88 public synchronized void start() { 89 if (state != 0) throw new IllegalStateException("Can not start again."); 90 state = 1; 91 pumpThread.start(); 92 } 93 94 /*** 95 * Returns immediately. The object must not be used again. 96 */ 97 public void abort() { 98 if (state != 1) return; 99 state = 2; 100 pumpThread.interrupt(); 101 dispose(); 102 } 103 104 /*** 105 * Blocks until all data has been copied. Basically calls the 106 * join method on the pump thread. 107 * @throws InterruptedException 108 */ 109 public void block() throws InterruptedException { 110 if (state != 1) throw new IllegalStateException("Can not block before started"); 111 pumpThread.join(); 112 } 113 114 private void dispose() { 115 pumpThread = null; 116 pump = null; 117 in = null; 118 out = null; 119 } 120 121 private class Pump implements Runnable { 122 123 public void run() { 124 byte[] buffer = new byte[10000]; 125 try { 126 while (!Thread.interrupted()) { 127 int len; 128 while ((len = in.read(buffer)) != -1) { 129 out.write(buffer, 0, len); 130 out.flush(); 131 } 132 } 133 } catch(IOException e) { 134 /* expected if parties close connection */ 135 e.printStackTrace(); 136 } finally { 137 dispose(); 138 } 139 } 140 141 } 142 }

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