org.apache.commons.net
Class DaytimeUDPClient

java.lang.Object
  org.apache.commons.net.DatagramSocketClient
      org.apache.commons.net.DaytimeUDPClient

public final class DaytimeUDPClient
extends DatagramSocketClient

The DaytimeUDPClient class is a UDP implementation of a client for the Daytime protocol described in RFC 867. To use the class, merely open a local datagram socket with open and call getTime to retrieve the daytime string, then call close to close the connection properly. Unlike DaytimeTCPClient, successive calls to getTime are permitted without re-establishing a connection. That is because UDP is a connectionless protocol and the Daytime protocol is stateless.

Author:

Daniel F. Savarese

See Also:

DaytimeTCPClient

Field Summary

static int

DEFAULT_PORT The default daytime port.

Fields inherited from class org.apache.commons.net.DatagramSocketClient

_isOpen_, _socket_, _socketFactory_, _timeout_

Constructor Summary

DaytimeUDPClient()

Method Summary

String	getTime(InetAddress host) Same as getTime(host, DaytimeUDPClient.DEFAULT_PORT);
String	getTime(InetAddress host, int port) Retrieves the time string from the specified server and port and returns it.

Methods inherited from class org.apache.commons.net.DatagramSocketClient

close, getDefaultTimeout, getLocalAddress, getLocalPort, getSoTimeout, isOpen, open, open, open, setDatagramSocketFactory, setDefaultTimeout, setSoTimeout

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_PORT

public static final int DEFAULT_PORT

The default daytime port. It is set to 13 according to RFC 867.

See Also:

Constant Field Values

Constructor Detail

DaytimeUDPClient

public DaytimeUDPClient()

Method Detail

getTime

public String getTime(InetAddress host,
                      int port)
               throws IOException

Retrieves the time string from the specified server and port and returns it.

Parameters:

host - The address of the server.

port - The port of the service.

Returns:

The time string.

Throws:

IOException - If an error occurs while retrieving the time.

getTime

public String getTime(InetAddress host)
               throws IOException

Same as getTime(host, DaytimeUDPClient.DEFAULT_PORT);

Throws:

IOException