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.

The following properties if set, provide support for IPv6:

• java.net.preferIPv6Addresses=TRUE
• net.jini.discovery.GLOBAL_ANNOUNCE=TRUE

Note that support for global announcement must be specifically set to be enabled. There is no support for global request, for obvious reasons.

Author:

Sun Microsystems, Inc.

Field Summary

Fields

Modifier and Type	Field and Description
static short	discoveryPort The port for both unicast and multicast boot requests.
static Boolean	GLOBAL_ANNOUNCE If true and IPv6 is also true, the announcement protocol will propagate over global networks.
static Boolean	IPv6 If true IPv6 has been enabled.

Method Summary

Modifier and Type	Method and Description
static InetAddress	getAnnouncementAddress() Return the address of the multicast group over which the multicast announcement protocol takes place.
static InetAddress	getRequestAddress() Return the address of the multicast group over which the multicast request protocol takes place.

Methods inherited from class java.lang.Object

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

Field Detail

IPv6

public static final Boolean IPv6

If true IPv6 has been enabled.

GLOBAL_ANNOUNCE

public static final Boolean GLOBAL_ANNOUNCE

If true and IPv6 is also true, the announcement protocol will propagate over global networks.

discoveryPort

public static final short discoveryPort

The port for both unicast and multicast boot requests.

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

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