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 org.apache.commons.net.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 and DaytimeUDP classes. This program connects to the default daytime service port of a 028 * specified server, retrieves the daytime, and prints it to standard output. The default is to use the TCP port. Use the -udp flag to use the UDP port. 029 * <p> 030 * Usage: daytime [-udp] <hostname> 031 */ 032public final class daytime { 033 034 public static void daytimeTCP(final String host) throws IOException { 035 final DaytimeTCPClient client = new DaytimeTCPClient(); 036 037 // We want to timeout if a response takes longer than 60 seconds 038 client.setDefaultTimeout(60000); 039 client.connect(host); 040 System.out.println(client.getTime().trim()); 041 client.disconnect(); 042 } 043 044 public static void daytimeUDP(final String host) throws IOException { 045 final DaytimeUDPClient client = new DaytimeUDPClient(); 046 047 // We want to timeout if a response takes longer than 60 seconds 048 client.setDefaultTimeout(60000); 049 client.open(); 050 System.out.println(client.getTime(InetAddress.getByName(host)).trim()); 051 client.close(); 052 } 053 054 public static void main(final String[] args) { 055 056 if (args.length == 1) { 057 try { 058 daytimeTCP(args[0]); 059 } catch (final IOException e) { 060 e.printStackTrace(); 061 System.exit(1); 062 } 063 } else if (args.length == 2 && args[0].equals("-udp")) { 064 try { 065 daytimeUDP(args[1]); 066 } catch (final IOException e) { 067 e.printStackTrace(); 068 System.exit(1); 069 } 070 } else { 071 System.err.println("Usage: daytime [-udp] <hostname>"); 072 System.exit(1); 073 } 074 075 } 076 077}