net.jini.discovery
Class Constants

java.lang.Object
  net.jini.discovery.Constants

public class Constants
extends Object

A holder class for constants that pertain to the unicast and multicast discovery protocols.

Author:

Sun Microsystems, Inc.

Field Summary

static String	MULTICAST_ANNOUNCEMENT_ADDRESS_PROPERTY
static String	MULTICAST_DISCOVERY_PORT_PROPERTY
static String	MULTICAST_ENABLED_PROPERTY
static String	MULTICAST_REQUEST_ADDRESS_PROPERTY
static String	MULTICAST_TTL_PROPERTY
static String	USE_SOCKET_KEEP_ALIVE
static String	USE_SOCKET_TCP_NO_DELAY

Method Summary

static InetAddress	getAnnouncementAddress() Return the address of the multicast group over which the multicast announcement protocol takes place.
static int	getDiscoveryPort()
static String	getHostAddress() Return the local host address using java.net.InetAddress.getLocalHost().getHostAddress()
static InetAddress	getRequestAddress() Return the address of the multicast group over which the multicast request protocol takes place.
static int	getTtl() Default time to live value to use for sending multicast packets
static boolean	isMulticastEnabled()
static boolean	useSocketKeepAlive()
static boolean	useSocketTcpNoDelay()

Methods inherited from class java.lang.Object

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

Field Detail

MULTICAST_ANNOUNCEMENT_ADDRESS_PROPERTY

public static final String MULTICAST_ANNOUNCEMENT_ADDRESS_PROPERTY

See Also:

Constant Field Values

MULTICAST_REQUEST_ADDRESS_PROPERTY

public static final String MULTICAST_REQUEST_ADDRESS_PROPERTY

See Also:

Constant Field Values

MULTICAST_DISCOVERY_PORT_PROPERTY

public static final String MULTICAST_DISCOVERY_PORT_PROPERTY

See Also:

Constant Field Values

MULTICAST_TTL_PROPERTY

public static final String MULTICAST_TTL_PROPERTY

See Also:

Constant Field Values

MULTICAST_ENABLED_PROPERTY

public static final String MULTICAST_ENABLED_PROPERTY

See Also:

Constant Field Values

USE_SOCKET_KEEP_ALIVE

public static final String USE_SOCKET_KEEP_ALIVE

See Also:

Constant Field Values

USE_SOCKET_TCP_NO_DELAY

public static final String USE_SOCKET_TCP_NO_DELAY

See Also:

Constant Field Values

Method Detail

getRequestAddress

public static final InetAddress getRequestAddress()
                                           throws UnknownHostException

Return the address of the multicast group over which the multicast request protocol takes place.

Returns:

the address of the multicast group over which the multicast request protocol takes place

Throws:

UnknownHostException

getAnnouncementAddress

public static final InetAddress getAnnouncementAddress()
                                                throws UnknownHostException

Return the address of the multicast group over which the multicast announcement protocol takes place.

Returns:

the address of the multicast group over which the multicast announcement protocol takes place.

Throws:

UnknownHostException

getDiscoveryPort

public static int getDiscoveryPort()

getTtl

public static int getTtl()

Default time to live value to use for sending multicast packets

isMulticastEnabled

public static boolean isMulticastEnabled()

useSocketKeepAlive

public static boolean useSocketKeepAlive()

useSocketTcpNoDelay

public static boolean useSocketTcpNoDelay()

getHostAddress

public static String getHostAddress()
                             throws UnknownHostException

Return the local host address using java.net.InetAddress.getLocalHost().getHostAddress()

Returns:

The local host address

Throws:

UnknownHostException - if no IP address for the local host could be found.