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
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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
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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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.net.InetAddress;
59 import org.apache.commons.net.DaytimeTCPClient;
60 import org.apache.commons.net.DaytimeUDPClient;
61
62 /****
63 * This is an example program demonstrating how to use the DaytimeTCP
64 * and DaytimeUDP classes.
65 * This program connects to the default daytime service port of a
66 * specified server, retrieves the daytime, and prints it to standard output.
67 * The default is to use the TCP port. Use the -udp flag to use the UDP
68 * port.
69 * <p>
70 * Usage: daytime [-udp] <hostname>
71 * <p>
72 ***/
73 public final class daytime
74 {
75
76 public static final void daytimeTCP(String host) throws IOException
77 {
78 DaytimeTCPClient client = new DaytimeTCPClient();
79
80 // We want to timeout if a response takes longer than 60 seconds
81 client.setDefaultTimeout(60000);
82 client.connect(host);
83 System.out.println(client.getTime().trim());
84 client.disconnect();
85 }
86
87 public static final void daytimeUDP(String host) throws IOException
88 {
89 DaytimeUDPClient client = new DaytimeUDPClient();
90
91 // We want to timeout if a response takes longer than 60 seconds
92 client.setDefaultTimeout(60000);
93 client.open();
94 System.out.println(client.getTime(
95 InetAddress.getByName(host)).trim());
96 client.close();
97 }
98
99
100 public static final void main(String[] args)
101 {
102
103 if (args.length == 1)
104 {
105 try
106 {
107 daytimeTCP(args[0]);
108 }
109 catch (IOException e)
110 {
111 e.printStackTrace();
112 System.exit(1);
113 }
114 }
115 else if (args.length == 2 && args[0].equals("-udp"))
116 {
117 try
118 {
119 daytimeUDP(args[1]);
120 }
121 catch (IOException e)
122 {
123 e.printStackTrace();
124 System.exit(1);
125 }
126 }
127 else
128 {
129 System.err.println("Usage: daytime [-udp] <hostname>");
130 System.exit(1);
131 }
132
133 }
134
135 }
136
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