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Java > Open Source Codes > examples > daytime


1 /*
2  * Copyright 2001-2005 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package examples;
17
18 import java.io.IOException JavaDoc;
19 import java.net.InetAddress JavaDoc;
20 import org.apache.commons.net.DaytimeTCPClient;
21 import org.apache.commons.net.DaytimeUDPClient;
22
23 /***
24  * This is an example program demonstrating how to use the DaytimeTCP
25  * and DaytimeUDP classes.
26  * This program connects to the default daytime service port of a
27  * specified server, retrieves the daytime, and prints it to standard output.
28  * The default is to use the TCP port. Use the -udp flag to use the UDP
29  * port.
30  * <p>
31  * Usage: daytime [-udp] <hostname>
32  * <p>
33  ***/
34 public final class daytime
35 {
36
37     public static final void daytimeTCP(String JavaDoc host) throws IOException JavaDoc
38     {
39         DaytimeTCPClient client = new DaytimeTCPClient();
40
41         // We want to timeout if a response takes longer than 60 seconds
42 client.setDefaultTimeout(60000);
43         client.connect(host);
44         System.out.println(client.getTime().trim());
45         client.disconnect();
46     }
47
48     public static final void daytimeUDP(String JavaDoc host) throws IOException JavaDoc
49     {
50         DaytimeUDPClient client = new DaytimeUDPClient();
51
52         // We want to timeout if a response takes longer than 60 seconds
53 client.setDefaultTimeout(60000);
54         client.open();
55         System.out.println(client.getTime(
56                                           InetAddress.getByName(host)).trim());
57         client.close();
58     }
59
60
61     public static final void main(String JavaDoc[] args)
62     {
63
64         if (args.length == 1)
65         {
66             try
67             {
68                 daytimeTCP(args[0]);
69             }
70             catch (IOException JavaDoc e)
71             {
72                 e.printStackTrace();
73                 System.exit(1);
74             }
75         }
76         else if (args.length == 2 && args[0].equals("-udp"))
77         {
78             try
79             {
80                 daytimeUDP(args[1]);
81             }
82             catch (IOException JavaDoc e)
83             {
84                 e.printStackTrace();
85                 System.exit(1);
86             }
87         }
88         else
89         {
90             System.err.println("Usage: daytime [-udp] <hostname>");
91             System.exit(1);
92         }
93
94     }
95
96 }
97
98
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