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1 package examples; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache Commons" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import java.io.IOException; 58 import java.io.InputStream; 59 import java.io.OutputStream; 60 import org.apache.commons.net.io.Util; 61 62 /**** 63 * This is a utility class providing a reader/writer capability required 64 * by the weatherTelnet, rexec, rshell, and rlogin example programs. 65 * The only point of the class is to hold the static method readWrite 66 * which spawns a reader thread and a writer thread. The reader thread 67 * reads from a local input source (presumably stdin) and writes the 68 * data to a remote output destination. The writer thread reads from 69 * a remote input source and writes to a local output destination. 70 * The threads terminate when the remote input source closes. 71 * <p> 72 ***/ 73 74 public final class IOUtil 75 { 76 77 public static final void readWrite(final InputStream remoteInput, 78 final OutputStream remoteOutput, 79 final InputStream localInput, 80 final OutputStream localOutput) 81 { 82 Thread reader, writer; 83 84 reader = new Thread() 85 { 86 public void run() 87 { 88 int ch; 89 90 try 91 { 92 while (!interrupted() && (ch = localInput.read()) != -1) 93 { 94 remoteOutput.write(ch); 95 remoteOutput.flush(); 96 } 97 } 98 catch (IOException e) 99 { 100 //e.printStackTrace(); 101 } 102 } 103 } 104 ; 105 106 107 writer = new Thread() 108 { 109 public void run() 110 { 111 try 112 { 113 Util.copyStream(remoteInput, localOutput); 114 } 115 catch (IOException e) 116 { 117 e.printStackTrace(); 118 System.exit(1); 119 } 120 } 121 }; 122 123 124 writer.setPriority(Thread.currentThread().getPriority() + 1); 125 126 writer.start(); 127 reader.setDaemon(true); 128 reader.start(); 129 130 try 131 { 132 writer.join(); 133 reader.interrupt(); 134 } 135 catch (InterruptedException e) 136 { 137 } 138 } 139 140 } 141

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