Package org.jgroups.tests

Class McastDiscovery

java.lang.Object

org.jgroups.tests.McastDiscovery

public class McastDiscovery
extends Object

Discovers all neighbors in an IP multicast environment by using expanding ring multicasts (increasing TTL). The sender multicasts a discovery packet on all available network interfaces, while also listening on all interfaces. The discovery packet contains the sender's address, which is the address and port of the interface on which the packet was sent. A receiver replies with an ACK back to the sender's address and port. After n responses or m milliseconds, the sender terminates and computes the network interfaces which should be used. The network interface is the intersection of the interface variable of all ACKs received.

Version:

$Revision: 1.1 $

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) class	McastDiscovery.McastSender
(package private) class	McastDiscovery.MessageHandler

Field Summary

Fields

Modifier and Type	Field	Description
(package private) List	handlers
(package private) long	interval
(package private) HashMap	map
(package private) InetAddress	mcast_addr
(package private) int	mcast_port
(package private) McastDiscovery.McastSender	mcast_sender
(package private) boolean	running
(package private) int	ttl

Constructor Summary

Constructors

Constructor	Description
McastDiscovery(InetAddress mcast_addr, int mcast_port, long interval, int ttl)

Method Summary

Modifier and Type	Method	Description
(package private) static void	help()
static void	main(String[] args)
(package private) void	printValidInterfaces()
void	start()

Methods inherited from class java.lang.Object

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

Field Details

ttl

int ttl

handlers

List handlers

mcast_addr

InetAddress mcast_addr

mcast_port

int mcast_port

interval

long interval

mcast_sender

McastDiscovery.McastSender mcast_sender

running

volatile boolean running

map

HashMap map

Constructor Details

McastDiscovery

public McastDiscovery(InetAddress mcast_addr,
 int mcast_port,
 long interval,
 int ttl)

Method Details

start

public void start()
           throws Exception

Throws:

Exception

printValidInterfaces

void printValidInterfaces()

main

public static void main(String[] args)

help

static void help()