001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package examples;
019
020 import java.io.IOException;
021 import java.net.InetAddress;
022
023 import org.apache.commons.net.daytime.DaytimeTCPClient;
024 import org.apache.commons.net.daytime.DaytimeUDPClient;
025
026 /***
027 * This is an example program demonstrating how to use the DaytimeTCP
028 * and DaytimeUDP classes.
029 * This program connects to the default daytime service port of a
030 * specified server, retrieves the daytime, and prints it to standard output.
031 * The default is to use the TCP port. Use the -udp flag to use the UDP
032 * port.
033 * <p>
034 * Usage: daytime [-udp] <hostname>
035 * <p>
036 ***/
037 public final class daytime
038 {
039
040 public static final void daytimeTCP(String host) throws IOException
041 {
042 DaytimeTCPClient client = new DaytimeTCPClient();
043
044 // We want to timeout if a response takes longer than 60 seconds
045 client.setDefaultTimeout(60000);
046 client.connect(host);
047 System.out.println(client.getTime().trim());
048 client.disconnect();
049 }
050
051 public static final void daytimeUDP(String host) throws IOException
052 {
053 DaytimeUDPClient client = new DaytimeUDPClient();
054
055 // We want to timeout if a response takes longer than 60 seconds
056 client.setDefaultTimeout(60000);
057 client.open();
058 System.out.println(client.getTime(
059 InetAddress.getByName(host)).trim());
060 client.close();
061 }
062
063
064 public static final void main(String[] args)
065 {
066
067 if (args.length == 1)
068 {
069 try
070 {
071 daytimeTCP(args[0]);
072 }
073 catch (IOException e)
074 {
075 e.printStackTrace();
076 System.exit(1);
077 }
078 }
079 else if (args.length == 2 && args[0].equals("-udp"))
080 {
081 try
082 {
083 daytimeUDP(args[1]);
084 }
085 catch (IOException e)
086 {
087 e.printStackTrace();
088 System.exit(1);
089 }
090 }
091 else
092 {
093 System.err.println("Usage: daytime [-udp] <hostname>");
094 System.exit(1);
095 }
096
097 }
098
099 }
100