org.apache.commons.net.daytime
Class DaytimeUDPClient
java.lang.Object
org.apache.commons.net.DatagramSocketClient
org.apache.commons.net.daytime.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. |
| 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 |
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
DaytimeUDPClient
public DaytimeUDPClient()
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
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