Examples of org.jgroups.stack.GossipRouter

org.jgroups.stack.GossipRouter
Router for TCP based group comunication (using layer TCP instead of UDP). Instead of the TCP layer sending packets point-to-point to each other member, it sends the packet to the router which - depending on the target address - multicasts or unicasts it to the group / or single member.
This class is especially interesting for applets which cannot directly make connections (neither UDP nor TCP) to a host different from the one they were loaded from. Therefore, an applet would create a normal channel plus protocol stack, but the bottom layer would have to be the TCP layer which sends all packets point-to-point (over a TCP connection) to the router, which in turn forwards them to their end location(s) (also over TCP). A centralized router would therefore have to be running on the host the applet was loaded from.
An alternative for running JGroups in an applet (IP multicast is not allows in applets as of 1.2), is to use point-to-point UDP communication via the gossip server. However, then the appplet has to be signed which involves additional administrative effort on the part of the user.
Note that a GossipRouter is also a good way of running JGroups in Amazon's EC2 environment which (as of summer 09) doesn't support IP multicasting. @author Bela Ban @author Vladimir Blagojevic @author Ovidiu Feodorov @since 2.1.1

        Integer loadFactor = RunDistributedCommandBus.determineLoadFactor();


        System.setProperty("loadFactor", loadFactor.toString());


        // Start the GossipRouter if it is not already running
        GossipRouter gossipRouter = new GossipRouter();
        try {
            gossipRouter.start();
        } catch (BindException e) {
            System.out.println("Gossip router is already started in another JVM instance.");
        }


        // Load the spring beans from the xml configuration file.

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        mockCommandBus2 = spy(new SimpleCommandBus());
        clusterName = "test-" + new Random().nextInt(Integer.MAX_VALUE);
        serializer = spy(new XStreamSerializer());
        connector1 = new JGroupsConnector(channel1, clusterName, mockCommandBus1, serializer);
        connector2 = new JGroupsConnector(channel2, clusterName, mockCommandBus2, serializer);
        gossipRouter = new GossipRouter(12001, "127.0.0.1");
    }

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        else
            bind_addr="127.0.0.1";
        promise=new Promise<Boolean>();
        gossip_router_port=ResourceManager.getNextTcpPort(InetAddress.getByName(bind_addr));
        gossip_router_hosts=bind_addr + "[" + gossip_router_port + "]";
        gossipRouter=new GossipRouter(gossip_router_port, bind_addr);
        gossipRouter.start();
    }

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        StackType type=Util.getIpStackType();
        String bind_addr_str=type == StackType.IPv6? "::1" : "127.0.0.1";
        bind_addr=InetAddress.getByName(bind_addr_str);
        gossip_router_port=ResourceManager.getNextTcpPort(bind_addr);
        gossip_router_hosts=bind_addr.getHostAddress() + "[" + gossip_router_port + "]";
        gossipRouter=new GossipRouter(gossip_router_port, bind_addr_str);
        gossipRouter.start();
    }

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            tmp=type == StackType.IPv6? "::1" : "127.0.0.1";
        }


        bind_addr=InetAddress.getByName(tmp);
        gossip_router_port=ResourceManager.getNextTcpPort(bind_addr);
        gossipRouter=new GossipRouter(gossip_router_port, null);
        gossipRouter.start();
    }

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        b=createTunnelChannel("B");
        b.setReceiver(new MyReceiver("c2", done, lock, cond));
        b.connect("demo");


        System.out.println("-- starting GossipRouter");
        router=new GossipRouter(gossip_router_port, bind_addr_str);
        router.start();


        System.out.println("-- waiting for merge to happen --");
        long target_time=System.currentTimeMillis() + 40000;
        lock.lock();

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