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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