Examples of org.jgroups.stack.ProtocolStack

org.jgroups.stack.ProtocolStack
A ProtocolStack manages a number of protocols layered above each other. It creates all protocol classes, initializes them and, when ready, starts all of them, beginning with the bottom most protocol. It also dispatches messages received from the stack to registered objects (e.g. channel, GMP) and sends messages sent by those objects down the stack.
The ProtocolStack makes use of the Configurator to setup and initialize stacks, and to destroy them again when not needed anymore @author Bela Ban






    private void sendMessages(Address dest, boolean use_scopes) throws Exception {
        if(use_scopes) {
            ProtocolStack stack=c2.getProtocolStack();
            Protocol neighbor=stack.findProtocol(UNICAST.class, UNICAST2.class);
            SCOPE scope=new SCOPE();
            stack.insertProtocolInStack(scope, neighbor, ProtocolStack.ABOVE);
            scope.init();
        }


        c1.connect("SCOPE_Test");
        c2.connect("SCOPE_Test");

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    static void log(String msg) {
        System.out.println(" -- "+ msg);
    }


    private static void modifyStack(JChannel ch) {
        ProtocolStack stack=ch.getProtocolStack();
        GMS gms=(GMS)stack.findProtocol(GMS.class);
        if(gms != null)
            gms.setLogCollectMessages(false);
    }

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        DISCARD_PAYLOAD prot1=new DISCARD_PAYLOAD();
        MyReceiver receiver=new MyReceiver();
        c2.setReceiver(receiver);


        // the first channel will discard the unicast messages with seqno #3 two times, the let them pass down
        ProtocolStack stack=c1.getProtocolStack();
        Protocol neighbor=stack.findProtocol(UNICAST.class, UNICAST2.class);
        System.out.println("Found unicast protocol " + neighbor.getClass().getSimpleName());
        stack.insertProtocolInStack(prot1, neighbor, ProtocolStack.BELOW);


        c1.connect("UNICAST_OOB_Test");
        c2.connect("UNICAST_OOB_Test");
        assert c2.getView().size() == 2 : "ch2.view is " + c2.getView();

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    private void createChannels(boolean copy_multicasts, boolean copy_unicasts, int num_outgoing_copies, int num_incoming_copies) throws Exception {
        c1=createChannel(true, 3);
        DUPL dupl=new DUPL(copy_multicasts, copy_unicasts, num_incoming_copies, num_outgoing_copies);
        ProtocolStack stack=c1.getProtocolStack();
        stack.insertProtocol(dupl, ProtocolStack.BELOW, NAKACK.class);


        c2=createChannel(c1);
        c3=createChannel(c1);


        c1.connect("DuplicateTest");

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            disconnected.await();
        }
    }


    private static void modifyStack(JChannel ch) {
        ProtocolStack stack=ch.getProtocolStack();
        Protocol prot=stack.findProtocol(MERGE2.class);
        if(prot != null) {
            MERGE2 merge=(MERGE2)prot;
            merge.setMinInterval(3000);
            merge.setMaxInterval(5000);
        }
        prot=stack.findProtocol(STABLE.class);
        if(prot != null) {
            STABLE stable=(STABLE)prot;
            stable.setDesiredAverageGossip(5000);
        }
        prot=stack.findProtocol(NAKACK.class);
        if(prot != null) {
            ((NAKACK)prot).setLogDiscardMessages(false);
        }
        prot=stack.findProtocol(FD_SOCK.class);
        if(prot != null) {
            ((FD_SOCK)prot).setLogSuspectedMessages(false);
        }
    }

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    void _testDelayedJoinResponse(long discovery_timeout, long join_timeout,
                                  long delay_join_req, long tolerance) throws Exception {
        c1.connect("JoinTest");
        c2.connect("JoinTest");


        ProtocolStack stack=c2.getProtocolStack();
        GMS gms=(GMS)stack.findProtocol("GMS");
        if(gms != null) {
            gms.setJoinTimeout(join_timeout);
        }


        Discovery discovery=(Discovery)stack.findProtocol(Discovery.class);        
        if(discovery != null) {
            discovery.setNumInitialMembers(10);
            discovery.setTimeout(discovery_timeout);
        }


        stack=c1.getProtocolStack();
        DELAY_JOIN_REQ delay=new DELAY_JOIN_REQ();
        delay.setDelay(delay_join_req);
        stack.insertProtocol(delay, ProtocolStack.BELOW, "GMS");


        System.out.println(new Date() + ": joining c2");
        long start=System.currentTimeMillis(), stop;
        c2.connect("JoinTest-2");
        stop=System.currentTimeMillis();

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  List<String> order = new LinkedList<String>() ;


  @BeforeMethod
  void setUp() {
    stack=new ProtocolStack();
  }

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        return new JChannel(config);
    }




    protected static void makeUnique(Channel channel, int num) throws Exception {
        ProtocolStack stack=channel.getProtocolStack();
        TP transport=stack.getTransport();
        InetAddress bind_addr=transport.getBindAddressAsInetAddress();


        if(transport instanceof UDP) {
            String mcast_addr=ResourceManager.getNextMulticastAddress();
            short mcast_port=ResourceManager.getNextMulticastPort(bind_addr);
            ((UDP)transport).setMulticastAddress(InetAddress.getByName(mcast_addr));
            ((UDP)transport).setMulticastPort(mcast_port);
        }
        else if(transport instanceof BasicTCP) {
            List<Short> ports=ResourceManager.getNextTcpPorts(bind_addr, num);
            transport.setBindPort(ports.get(0));
            transport.setPortRange(num);


            Protocol ping=stack.findProtocol(TCPPING.class);
            if(ping == null)
                throw new IllegalStateException("TCP stack must consist of TCP:TCPPING - other config are not supported");


            List<String> initial_hosts=new LinkedList<String>();
            for(short port: ports) {

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  static final String BIND_ADDR = "192.168.1.101" ;


  public static void main(String[] args) throws Exception {


    JChannel channel = new JChannel(false);
    ProtocolStack stack = new ProtocolStack();
    channel.setProtocolStack(stack);
    
    stack.addProtocols(new UDP().setValue("bind_addr", InetAddress.getByName(BIND_ADDR)))
        .addProtocol(new PING())
        .addProtocol(new MERGE2())
        .addProtocol(new FD_SOCK())
        .addProtocol(new FD_ALL().setValue("timeout", 12000).setValue("interval", 3000))
        .addProtocol(new VERIFY_SUSPECT()).addProtocol(new BARRIER())
        .addProtocol(new NAKACK()).addProtocol(new UNICAST2())
        .addProtocol(new STABLE()).addProtocol(new GMS())
        .addProtocol(new UFC()).addProtocol(new MFC())
        .addProtocol(new FRAG2());
    stack.init();
    
    channel.setReceiver(new ReceiverAdapter(){


      public void receive(Message msg) {
        Address sender=msg.getSrc();

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            case MPerfHeader.CONFIG_RSP:
                handleConfigResponse((Configuration)msg.getObject());
                break;


            case MPerfHeader.EXIT:
                ProtocolStack stack=channel.getProtocolStack();
                String cluster_name=channel.getClusterName();
                try {
                    JmxConfigurator.unregisterChannel(channel, Util.getMBeanServer(), "jgroups", "mperf");
                }
                catch(Exception e) {
                }
                stack.stopStack(cluster_name);
                stack.destroy();
                break;


            case MPerfHeader.NEW_CONFIG:
                applyNewConfig(msg.getBuffer());
                break;

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