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
018package examples.unix;
019
020import java.io.IOException;
021import java.net.InetAddress;
022
023import org.apache.commons.net.daytime.DaytimeTCPClient;
024import 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 ***/
036public final class daytime
037{
038
039    public static final void daytimeTCP(String host) throws IOException
040    {
041        DaytimeTCPClient client = new DaytimeTCPClient();
042
043        // We want to timeout if a response takes longer than 60 seconds
044        client.setDefaultTimeout(60000);
045        client.connect(host);
046        System.out.println(client.getTime().trim());
047        client.disconnect();
048    }
049
050    public static final void daytimeUDP(String host) throws IOException
051    {
052        DaytimeUDPClient client = new DaytimeUDPClient();
053
054        // We want to timeout if a response takes longer than 60 seconds
055        client.setDefaultTimeout(60000);
056        client.open();
057        System.out.println(client.getTime(
058                                          InetAddress.getByName(host)).trim());
059        client.close();
060    }
061
062
063    public static void main(String[] args)
064    {
065
066        if (args.length == 1)
067        {
068            try
069            {
070                daytimeTCP(args[0]);
071            }
072            catch (IOException e)
073            {
074                e.printStackTrace();
075                System.exit(1);
076            }
077        }
078        else if (args.length == 2 && args[0].equals("-udp"))
079        {
080            try
081            {
082                daytimeUDP(args[1]);
083            }
084            catch (IOException e)
085            {
086                e.printStackTrace();
087                System.exit(1);
088            }
089        }
090        else
091        {
092            System.err.println("Usage: daytime [-udp] <hostname>");
093            System.exit(1);
094        }
095
096    }
097
098}
099