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 protocolStackTest() throws Exception {


    logger.info("programmatically create a channel start");
    
    JChannel channel = new JChannel(false);
    ProtocolStack stack = new ProtocolStack();
    channel.setProtocolStack(stack);
    
    stack.addProtocols(new UDP().setValue("bind_addr", InetAddress.getByName("192.168.1.108")))
        .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();
    
    
  }

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        try {
            mq.reset();


            // new stack is created on open() - bela June 12 2003
            prot_stack=new ProtocolStack(this, props);
            prot_stack.setup();
            closed=false;
        }
        catch(Exception e) {
            throw new ChannelException("failed to open channel" , e);

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    protected final void init(ProtocolStackConfigurator configurator) throws ChannelException {
        if(log.isInfoEnabled())
            log.info("JGroups version: " + Version.description);
        ConfiguratorFactory.substituteVariables(configurator); // replace vars with system props
        props=configurator.getProtocolStackString();
        prot_stack=new ProtocolStack(this, props);
        try {
            prot_stack.setup(); // Setup protocol stack (create layers, queues between them
        }
        catch(Throwable e) {
            throw new ChannelException("unable to setup the protocol stack", e);

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        c2_repl.clear();
    }




    private void setCorrectPortRange(Channel ch) {
        ProtocolStack stack=((MuxChannel)ch).getProtocolStack();
        Protocol tcpping=stack.findProtocol("TCPPING");
        if(tcpping == null)
            return;


        Properties props=tcpping.getProperties();
        String port_range=props.getProperty("port_range");

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   }




   public boolean isSupportStateTransfer() {
      // tests whether state transfer is supported.  We *need* STREAMING_STATE_TRANSFER.
      ProtocolStack stack;
      if (channel != null && (stack = channel.getProtocolStack()) != null) {
         if (stack.findProtocol(STREAMING_STATE_TRANSFER.class) == null) {
            log.error("Channel does not contain STREAMING_STATE_TRANSFER.  Cannot support state transfers!");
            return false;
         }
      } else {
         log.warn("Channel not set up properly!");

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   }


   public static DISCARD getDiscardForCache(Cache<?, ?> c) throws Exception {
      JGroupsTransport jgt = (JGroupsTransport) TestingUtil.extractComponent(c, Transport.class);
      Channel ch = jgt.getChannel();
      ProtocolStack ps = ch.getProtocolStack();
      DISCARD discard = new DISCARD();
      ps.insertProtocol(discard, ProtocolStack.ABOVE, TP.class);
      return discard;
   }

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    * @throws Exception
    */
   public static DELAY setDelayForCache(Cache<?, ?> cache, int in_delay_millis, int out_delay_millis) throws Exception {
      JGroupsTransport jgt = (JGroupsTransport) TestingUtil.extractComponent(cache, Transport.class);
      Channel ch = jgt.getChannel();
      ProtocolStack ps = ch.getProtocolStack();
      DELAY delay = new DELAY();
      delay.setInDelay(in_delay_millis);
      delay.setOutDelay(out_delay_millis);
      ps.insertProtocol(delay, ProtocolStack.ABOVE, TP.class);
      return delay;
   }

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    this.protStack[this.protStack.length-1].setDownProtocol(ad);
    top=protStack[0];
    bottom=this.protStack[this.protStack.length-1];


    try {
      prot_stack=new ProtocolStack();
    } catch (ChannelException e) {           
      e.printStackTrace();
    }


    if(protStack.length > 1) {

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        this.harness=harness;
        props="LOOPBACK:" + props; // add a loopback layer at the bottom of the stack


        config=new Configurator();
        JChannel mock_channel=new JChannel() {};
        ProtocolStack stack=new ProtocolStack(mock_channel,props);
        stack.setup();
        stack.insertProtocol(harness, ProtocolStack.ABOVE, stack.getTopProtocol().getClass());
        
        bottom=stack.getBottomProtocol();


        // has to be set after StartProtocolStack, otherwise the up and down handler threads in the harness
        // will be started as well (we don't want that) !
        // top.setUpProtocol(harness);
    }

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            cluster_name=channel != null? channel.getClusterName() : null;
        if(cluster_name == null)
            cluster_name="null";


        if(register_protocols) {
            ProtocolStack stack=channel.getProtocolStack();
            Vector<Protocol> protocols=stack.getProtocols();
            for(Protocol p:protocols) {
                register(p,
                         ManagementFactory.getPlatformMBeanServer(),
                         getProtocolRegistrationName(cluster_name, domain, p));
            }

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