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java.lang.Object org.apache.commons.net.DatagramSocketClient org.apache.commons.net.time.TimeUDPClient
public final class 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.
TimeTCPClient
Field Summary | |
---|---|
static int |
DEFAULT_PORT
The default time port. |
static long |
SECONDS_1900_TO_1970
The number of seconds between 00:00 1 January 1900 and 00:00 1 January 1970. |
Fields inherited from class org.apache.commons.net.DatagramSocketClient |
---|
_isOpen_, _socket_, _socketFactory_, _timeout_ |
Constructor Summary | |
---|---|
TimeUDPClient()
|
Method Summary | |
---|---|
Date |
getDate(InetAddress host)
Same as getTime(host, DEFAULT_PORT); |
Date |
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 as getTime(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 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 |
---|
public static final int DEFAULT_PORT
public static final long SECONDS_1900_TO_1970
Constructor Detail |
---|
public TimeUDPClient()
Method Detail |
---|
public long getTime(InetAddress host, int port) throws IOException
host
- The address of the server.port
- The port of the service.
IOException
- If an error occurs while retrieving the time.public long getTime(InetAddress host) throws IOException
getTime(host, DEFAULT_PORT);
IOException
public Date getDate(InetAddress host, int port) throws IOException
host
- The address of the server.port
- The port of the service.
IOException
- If an error occurs while fetching the time.public Date getDate(InetAddress host) throws IOException
getTime(host, DEFAULT_PORT);
IOException
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