Package com.oroinc.net
Class TimeUDPClient
java.lang.Object
com.oroinc.net.DatagramSocketClient
com.oroinc.net.TimeUDPClient
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.
- Author:
- Daniel F. Savarese
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
The default time port.static final long
The number of seconds between 00:00 1 January 1900 and 00:00 1 January 1970.Fields inherited from class com.oroinc.net.DatagramSocketClient
_isOpen_, _socket_, _socketFactory_, _timeout_
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiongetDate
(InetAddress host) Same asgetTime(host, DEFAULT_PORT);
getDate
(InetAddress host, int port) Retrieves the time from the server and returns a Java Date containing the time converted to the local timezone.long
getTime
(InetAddress host) Same asgetTime(host, DEFAULT_PORT);
long
getTime
(InetAddress host, int port) Retrieves the time from the specified server and port and returns it.Methods inherited from class com.oroinc.net.DatagramSocketClient
close, getDefaultTimeout, getLocalAddress, getLocalPort, getSoTimeout, isOpen, open, open, open, setDatagramSocketFactory, setDefaultTimeout, setSoTimeout
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Field Details
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DEFAULT_PORT
public static final int DEFAULT_PORTThe default time port. It is set to 37 according to RFC 868.- See Also:
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SECONDS_1900_TO_1970
public static final long SECONDS_1900_TO_1970The 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.- See Also:
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Constructor Details
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TimeUDPClient
public TimeUDPClient()
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Method Details
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getTime
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.
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getTime
Same asgetTime(host, DEFAULT_PORT);
- Throws:
IOException
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getDate
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.
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getDate
Same asgetTime(host, DEFAULT_PORT);
- Throws:
IOException
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