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

        assert msg != null;
        assert "payload".equals(msg.getObject());
    }


    private static void setProps(JChannel channel) {
        ProtocolStack stack=channel.getProtocolStack();
        MERGE2 merge=(MERGE2)stack.findProtocol(MERGE2.class);
        if(merge != null) {
            merge.setMinInterval(1000);
            merge.setMaxInterval(3000);
        }
        FD fd=(FD)stack.findProtocol(FD.class);
        if(fd != null) {
            fd.setTimeout(1000);
            fd.setMaxTries(2);
        }
        FD_ALL fd_all=(FD_ALL)stack.findProtocol(FD_ALL.class);
        if(fd_all != null) {
            fd_all.setTimeout(2000);
            fd_all.setInterval(600);
        }
    }

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    }




    private static void modifyConfigs(JChannel ... channels) throws Exception {
        for(JChannel ch: channels) {
            ProtocolStack stack=ch.getProtocolStack();
            stack.removeProtocol("MERGE2");
            stack.removeProtocol("FC");
            stack.removeProtocol("VERIFY_SUSPECT");
            NAKACK nak=(NAKACK)stack.findProtocol(NAKACK.class);
            if(nak != null)
                nak.setLogDiscardMessages(false);
        }
    }

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        }
    }




    private static void changeViewBundling(JChannel channel) {
        ProtocolStack stack=channel.getProtocolStack();
        GMS gms=(GMS)stack.findProtocol(GMS.class);
        if(gms != null) {
            gms.setViewBundling(true);
            gms.setMaxBundlingTime(500);
        }
    }

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            gms.setMaxBundlingTime(500);
        }
    }


    private static void changeMergeInterval(JChannel channel) {
        ProtocolStack stack=channel.getProtocolStack();
        MERGE2 merge=(MERGE2)stack.findProtocol(MERGE2.class);
        if(merge != null) {
            merge.setMinInterval(5000);
            merge.setMaxInterval(10000);
        }
    }

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            merge.setMaxInterval(10000);
        }
    }
    
    private static void replaceDiscoveryProtocol(JChannel ch) throws Exception {
        ProtocolStack stack=ch.getProtocolStack();
        Protocol discovery=stack.removeProtocol("TCPPING");
        if(discovery != null){
            Protocol transport = stack.getTransport();
            MPING mping=new MPING();
            InetAddress bindAddress=Util.getBindAddress(new Properties());
            mping.setBindAddr(bindAddress);
            mping.setMulticastAddress("230.1.2.3");
            mping.setMcastPort(8888);            
            stack.insertProtocol(mping, ProtocolStack.ABOVE, transport.getName());
            mping.setProtocolStack(ch.getProtocolStack());
            mping.init();
            mping.start();            
            System.out.println("Replaced TCPPING with MPING. See http://wiki.jboss.org/wiki/Wiki.jsp?page=JGroupsMERGE2");            
        }

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    public static void addFlush(Channel ch, FLUSH flush) {
        if(ch == null || flush == null)
            throw new IllegalArgumentException("ch and flush have to be non-null");
        ProtocolStack stack=ch.getProtocolStack();
        stack.insertProtocolAtTop(flush);
    }

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     * the view until failure detection has kicked in and the new coord installed the new view */
    public static void shutdown(Channel ch) throws Exception {
        DISCARD discard=new DISCARD();
        discard.setLocalAddress(ch.getAddress());
        discard.setDiscardAll(true);
        ProtocolStack stack=ch.getProtocolStack();
        TP transport=stack.getTransport();
        stack.insertProtocol(discard,  ProtocolStack.ABOVE, transport.getClass());
        
        //abruptly shutdown FD_SOCK just as in real life when member gets killed non gracefully
        FD_SOCK fd = (FD_SOCK) ch.getProtocolStack().findProtocol("FD_SOCK");
        if(fd != null)
            fd.stopServerSocket(false);
        
        View view=ch.getView();
        if (view != null) {
            ViewId vid = view.getViewId();
            List<Address> members = Arrays.asList(ch.getAddress());


            ViewId new_vid = new ViewId(ch.getAddress(), vid.getId() + 1);
            View new_view = new View(new_vid, members);


            // inject view in which the shut down member is the only element
            GMS gms = (GMS) stack.findProtocol(GMS.class);
            gms.installView(new_view);
        }
        Util.close(ch);
    }

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    @BeforeMethod
    void setUp() throws Exception {
        JChannel mock_channel=new JChannel() {};
        stack=new ProtocolStack(mock_channel);
    }

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    }




    protected static JChannel createChannel() throws Exception {
        JChannel ch=new JChannel(false);
        ProtocolStack stack=new ProtocolStack();
        ch.setProtocolStack(stack);
        stack.addProtocol(new SHARED_LOOPBACK().setValue("oob_thread_pool_rejection_policy", "run")
                            .setValue("thread_pool_rejection_policy", "run")
                            .setValue("thread_pool_queue_max_size", 100000))
          .addProtocol(new PING())
          .addProtocol(new MERGE2())
          .addProtocol(new FD_SOCK())
          .addProtocol(new VERIFY_SUSPECT())
          .addProtocol(new BARRIER())
          .addProtocol(new NAKACK().setValue("use_mcast_xmit", false).setValue("discard_delivered_msgs", true))
          .addProtocol(new UNICAST2().setValue("stable_interval", 10000).setValue("max_bytes", 50000))
          .addProtocol(new STABLE().setValue("max_bytes", 50000))
          .addProtocol(new GMS().setValue("print_local_addr", false))
          .addProtocol(new UFC().setValue("max_credits", 2000000))
          .addProtocol(new MFC().setValue("max_credits", 2000000))
          .addProtocol(new FRAG2());
        stack.init();
        return ch;
    }

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        View view=ch2.getView();
        assert view.size() == 2 : " view=" + view;
    }


    private static void setLoopback(JChannel ch, boolean b) {
        ProtocolStack stack=ch.getProtocolStack();
        List<Protocol> prots=stack.getProtocols();
        TP transport=(TP)prots.get(prots.size() -1);
        transport.setLoopback(b);
    }

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