Package org.apache.commons.net.time

Class TimeTCPClient

java.lang.Object

org.apache.commons.net.SocketClient

org.apache.commons.net.time.TimeTCPClient

public final class TimeTCPClient
extends SocketClient

The TimeTCPClient class is a TCP implementation of a client for the Time protocol described in RFC 868. To use the class, merely establish a connection with connect and call either getTime() or getDate() to retrieve the time, then call disconnect to close the connection properly.

See Also:

• TimeUDPClient

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_PORT	The default time port.
static final 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.SocketClient

_defaultPort_, _hostname_, _input_, _output_, _serverSocketFactory_, _socket_, _socketFactory_, _timeout_, connectTimeout, NETASCII_EOL, remoteInetSocketAddress

Constructor Summary

Constructors

Constructor	Description
TimeTCPClient()	The default TimeTCPClient constructor.

Method Summary

Modifier and Type	Method	Description
Date	getDate()	Retrieves the time from the server and returns a Java Date containing the time converted to the local time zone.
long	getTime()	Retrieves the time from the server and returns it.

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

_connectAction_, addProtocolCommandListener, applySocketAttributes, checkOpenOutputStream, connect, connect, connect, connect, connect, connect, createCommandSupport, disconnect, fireCommandSent, fireReplyReceived, getCharset, getCharsetName, getCommandSupport, getConnectTimeout, getDefaultPort, getDefaultTimeout, getKeepAlive, getLocalAddress, getLocalPort, getProxy, getReceiveBufferSize, getRemoteAddress, getRemoteInetSocketAddress, getRemotePort, getSendBufferSize, getServerSocketFactory, getSoLinger, getSoTimeout, getTcpNoDelay, isAvailable, isConnected, removeProtocolCommandListener, setCharset, setConnectTimeout, setDefaultPort, setDefaultTimeout, setKeepAlive, setProxy, setReceiveBufferSize, setSendBufferSize, setServerSocketFactory, setSocketFactory, setSoLinger, setSoTimeout, setTcpNoDelay, verifyRemote

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_PORT

public static final int DEFAULT_PORT

The default time port. It is set to 37 according to RFC 868.

See Also:

• Constant Field Values

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.

See Also:

• Constant Field Values

Constructor Details

TimeTCPClient

public TimeTCPClient()

The default TimeTCPClient constructor. It merely sets the default port to DEFAULT_PORT.

Method Details

getDate

public Date getDate()
             throws IOException

Retrieves the time from the server and returns a Java Date containing the time converted to the local time zone.

The server will have closed the connection at this point, so you should call disconnect after calling this method. To retrieve another time, you must initiate another connection with connect before calling getDate() again.

Returns:

A Date value containing the time retrieved from the server converted to the local time zone.

Throws:

IOException - If an error occurs while fetching the time.

getTime

public long getTime()
             throws IOException

Retrieves the time from the server 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.

The server will have closed the connection at this point, so you should call disconnect after calling this method. To retrieve another time, you must initiate another connection with connect before calling getTime() again.

Returns:

The time value retrieved from the server.

Throws:

IOException - If an error occurs while fetching the time.