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


    public static void unregisterChannel(org.jgroups.JChannel c,
                                         MBeanServer server,
                                         String clusterName) throws Exception {


        ProtocolStack stack=c.getProtocolStack();
        Vector<Protocol> protocols=stack.getProtocols();
        for(Protocol p:protocols) {
            if(p.getClass().isAnnotationPresent(MBean.class)) {
                try {
                    unregister(p,
                               ManagementFactory.getPlatformMBeanServer(),

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     * Returns a pretty-printed form of all the protocols. If include_properties
     * is set, the properties for each protocol will also be printed.
     */
    @ManagedOperation
    public String printProtocolSpec(boolean include_properties) {
        ProtocolStack ps=getProtocolStack();
        return ps != null? ps.printProtocolSpec(include_properties) : null;
    }

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            mq.reset();


            String props=getProperties();


            // 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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        // ConfiguratorFactory.substituteVariables(configurator); // replace vars with system props
        String tmp=configurator.getProtocolStackString();
        tmp=Util.substituteVariable(tmp); // replace vars with system props


        prot_stack=new ProtocolStack(this, tmp);
        try {
            prot_stack.setup(); // Setup protocol stack (creates protocol, calls init() on them)
            properties=tmp;
        }
        catch(Throwable e) {

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    protected final void init(JChannel ch) throws ChannelException {
        if(ch == null)
            throw new IllegalArgumentException("channel is null");
        if(log.isInfoEnabled())
            log.info("JGroups version: " + Version.description);
        prot_stack=new ProtocolStack(this, null);
        try {
            prot_stack.setup(ch.getProtocolStack()); // Setup protocol stack (creates protocol, calls init() on them)
            getProperties();
        }
        catch(Throwable e) {

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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.streamingStateTransferNotPresent();
            return false;
         }
      } else {
         log.channelNotSetUp();

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      }
      //bundling is not good for sync caches
      Configuration.CacheMode cacheMode = configuration.getCacheMode();
      if (!cacheMode.equals(Configuration.CacheMode.LOCAL) && configuration.getCacheMode().isSynchronous())
      {
         ProtocolStack stack = ((JChannel) channel).getProtocolStack();
         TP transport = stack.getTransport();
         if (transport.isEnableBundling() && log.isWarnEnabled())
         {
            log.warn("You have enabled jgroups's message bundling, which is not recommended for sync replication. If there is no particular " +
                  "reason for this we strongly recommend to disable message bundling in JGroups config (enable_bundling=\"false\").");
         }
      }
      //bundling is good for async caches
      if (!cacheMode.isSynchronous())
      {
         ProtocolStack stack = ((JChannel) channel).getProtocolStack();
         TP transport = stack.getTransport();
         if (!transport.isEnableBundling() && log.isWarnEnabled())
         {
            log.warn("You have disabled jgroups's message bundling, which is not recommended for async replication. If there is no particular " +
                  "reason for this we strongly recommend to enable message bundling in JGroups config (enable_bundling=\"true\").");
         }

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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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         return;
      }
      
      JChannel jchannel = (JChannel) channel;
      
      ProtocolStack stack = jchannel.getProtocolStack();
      List<Protocol> protocols = stack.getProtocols();
      TP tp = null;
      for (int i = protocols.size() - 1; i >= 0; i--)
      {
         if (protocols.get(i) instanceof TP)
         {

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         getServer().registerMBean(conf.asDynamicMBean(ch), channelName);
         allNames.add(channelName);
         if (isExposeProtocols())
         {
            String baseName = getDomain() + ":type=protocol,cluster=" + channelId;
            ProtocolStack stack=ch.getProtocolStack();
            List<Protocol> protocols=stack.getProtocols();
            
            for(Protocol prot : protocols)
            {                                
                ObjectName prot_name=new ObjectName(baseName + ",protocol=" + prot.getName());
                server.registerMBean(conf.asDynamicMBean(prot), prot_name);

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