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examples.rdate |
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1 | /* |
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2 | * Copyright 2001-2005 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package examples; |
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17 | ||
18 | import java.io.IOException; |
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19 | import java.net.InetAddress; |
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20 | import org.apache.commons.net.TimeTCPClient; |
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21 | import org.apache.commons.net.TimeUDPClient; |
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22 | ||
23 | /*** |
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24 | * This is an example program demonstrating how to use the TimeTCPClient |
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25 | * and TimeUDPClient classes. It's very similar to the simple Unix rdate |
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26 | * command. This program connects to the default time service port of a |
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27 | * specified server, retrieves the time, and prints it to standard output. |
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28 | * The default is to use the TCP port. Use the -udp flag to use the UDP |
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29 | * port. You can test this program by using the NIST time server at |
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30 | * 132.163.135.130 (warning: the IP address may change). |
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31 | * <p> |
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32 | * Usage: rdate [-udp] <hostname> |
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33 | * <p> |
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34 | * <p> |
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35 | * @author Daniel F. Savarese |
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36 | ***/ |
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37 | 0 | public final class rdate |
38 | { |
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39 | ||
40 | public static final void timeTCP(String host) throws IOException |
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41 | { |
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42 | 0 | TimeTCPClient client = new TimeTCPClient(); |
43 | ||
44 | // We want to timeout if a response takes longer than 60 seconds |
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45 | 0 | client.setDefaultTimeout(60000); |
46 | 0 | client.connect(host); |
47 | 0 | System.out.println(client.getDate().toString()); |
48 | 0 | client.disconnect(); |
49 | 0 | } |
50 | ||
51 | public static final void timeUDP(String host) throws IOException |
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52 | { |
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53 | 0 | TimeUDPClient client = new TimeUDPClient(); |
54 | ||
55 | // We want to timeout if a response takes longer than 60 seconds |
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56 | 0 | client.setDefaultTimeout(60000); |
57 | 0 | client.open(); |
58 | 0 | System.out.println(client.getDate(InetAddress.getByName(host)).toString()); |
59 | 0 | client.close(); |
60 | 0 | } |
61 | ||
62 | ||
63 | public static final void main(String[] args) |
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64 | { |
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65 | ||
66 | 0 | if (args.length == 1) |
67 | { |
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68 | try |
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69 | { |
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70 | 0 | timeTCP(args[0]); |
71 | } |
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72 | 0 | catch (IOException e) |
73 | { |
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74 | 0 | e.printStackTrace(); |
75 | 0 | System.exit(1); |
76 | 0 | } |
77 | } |
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78 | 0 | else if (args.length == 2 && args[0].equals("-udp")) |
79 | { |
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80 | try |
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81 | { |
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82 | 0 | timeUDP(args[1]); |
83 | } |
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84 | 0 | catch (IOException e) |
85 | { |
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86 | 0 | e.printStackTrace(); |
87 | 0 | System.exit(1); |
88 | 0 | } |
89 | } |
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90 | else |
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91 | { |
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92 | 0 | System.err.println("Usage: rdate [-udp] <hostname>"); |
93 | 0 | System.exit(1); |
94 | } |
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95 | ||
96 | 0 | } |
97 | ||
98 | } |
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99 |
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