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Class com.oroinc.net.TimeUDPClient

java.lang.Object
   |
   +----com.oroinc.net.DatagramSocketClient
           |
           +----com.oroinc.net.TimeUDPClient

public final class TimeUDPClient
extends DatagramSocketClient
The TimeUDPClient class is a UDP implementation of a client for the Time protocol described in RFC 868. To use the class, merely open a local datagram socket with open and call getTime or getDate to retrieve the time. Then call close to close the connection properly. Unlike TimeTCPClient , successive calls to getTime or getDate are permitted without re-establishing a connection. That is because UDP is a connectionless protocol and the Time protocol is stateless.

Copyright © 1997 Original Reusable Objects, Inc. All rights reserved.

See Also:
TimeTCPClient

Variable Index

 o DEFAULT_PORT
The default time port.
 o SECONDS_1900_TO_1970
The number of seconds between 00:00 1 January 1900 and 00:00 1 January 1970.

Constructor Index

 o TimeUDPClient()

Method Index

 o getDate(InetAddress)
Same as getTime(host, DEFAULT_PORT);
 o getDate(InetAddress, int)
Retrieves the time from the server and returns a Java Date containing the time converted to the local timezone.
 o getTime(InetAddress)
Same as getTime(host, DEFAULT_PORT);
 o getTime(InetAddress, int)
Retrieves the time from the specified server and port and returns it.

Variables

 o DEFAULT_PORT
 public static final int DEFAULT_PORT
The default time port. It is set to 37 according to RFC 868.

 o SECONDS_1900_TO_1970
 public static final long SECONDS_1900_TO_1970
The number of seconds between 00:00 1 January 1900 and 00:00 1 January 1970. This value can be useful for converting time values to other formats.

Constructors

 o TimeUDPClient
 public TimeUDPClient()

Methods

 o getTime
 public long getTime(InetAddress host,
                     int port) throws IOException
Retrieves the time from the specified server and port and returns it. The time is the number of seconds since 00:00 (midnight) 1 January 1900 GMT, as specified by RFC 868. This method reads the raw 32-bit big-endian unsigned integer from the server, converts it to a Java long, and returns the value.

Parameters:
host - The address of the server.
port - The port of the service.
Returns:
The time value retrieved from the server.
Throws: IOException
If an error occurs while retrieving the time.
 o getTime
 public long getTime(InetAddress host) throws IOException
Same as getTime(host, DEFAULT_PORT);

 o getDate
 public Date getDate(InetAddress host,
                     int port) throws IOException
Retrieves the time from the server and returns a Java Date containing the time converted to the local timezone.

Parameters:
host - The address of the server.
port - The port of the service.
Returns:
A Date value containing the time retrieved from the server converted to the local timezone.
Throws: IOException
If an error occurs while fetching the time.
 o getDate
 public Date getDate(InetAddress host) throws IOException
Same as getTime(host, DEFAULT_PORT);


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