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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.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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