Examples of com.cloud.agent.transport.Request

com.cloud.agent.transport.Request
Request is a simple wrapper around command and answer to add sequencing, versioning, and flags. Note that the version here represents the changes in the over the wire protocol. For example, if we decide to not use Gson. It does not version the changes in the actual commands. That's expected to be done by adding new classes to the command and answer list. A request looks as follows: 1. Version - 1 byte; 2. Flags - 3 bytes; 3. Sequence - 8 bytes; 4. Length - 4 bytes; 5. ManagementServerId - 8 bytes; 6. AgentId - 8 bytes; 7. Data Package.

                    }
                }
            }


            if (s_logger.isDebugEnabled()) {
                new Request(-1l, -1l, cmds, true, false).logD("Startup request from directly connected host: ", true);
            }


            if (old) {
                StartupCommand firstCmd = cmds[0];
                host = findHostByGuid(firstCmd.getGuid());

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                s_logger.debug(log(seq, "No more commands found"));
            }
            return;
        }


        Request req = _requests.pop();
        if (s_logger.isDebugEnabled()) {
            s_logger.debug(log(req.getSequence(), "Sending now.  is current sequence."));
        }
        try {
            send(req);
        } catch (AgentUnavailableException e) {
            if (s_logger.isDebugEnabled()) {
                s_logger.debug(log(req.getSequence(), "Unable to send the next sequence"));
            }
            cancel(req.getSequence());
        }
        _currentSequence = req.getSequence();
    }

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      final Type type = task.getType();
      s_logger.info("recieved task of type "+ type.toString() +" to handle in BootStrapTakHandler");
      if (type == Task.Type.DATA)
      {
        final byte[] data = task.getData();
        final Request request = Request.parse(data);
        final Command cmd = request.getCommand();
        
        if (cmd instanceof StartupVMMAgentCommand) {


          StartupVMMAgentCommand vmmCmd = (StartupVMMAgentCommand) cmd;

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              "8250",
              HypervServerDiscoverer.class.getPackage().getImplementationVersion());
          
          // send bootstrap command to agent running on SCVMM host  
          s_logger.info("sending bootstrap request to SCVMM agent on host "+ url.getHost());
          Request request = new Request(0, 0, cmd, false);


          // :FIXME without sleep link.send failing why??????
          Thread.currentThread().sleep(5000);
          _link.send(request.toBytes());


          //wait for SCVMM agent to connect back
      HostVO connectedHost = waitForHostConnect(dcId, podId, clusterId, guidWithTail);
      if (connectedHost == null)
      {

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        return _sslEngines.get(peerName);
    }


    public void cancel(String peerName, long hostId, long sequence, String reason) {
        CancelCommand cancel = new CancelCommand(sequence, reason);
        Request req = new Request(hostId, _nodeId, cancel, true);
        req.setControl(true);
        routeToPeer(peerName, req.getBytes());
    }

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            //1) Set transfer mode to false - so the agent can start processing requests normally
            forwardAttache.setTransferMode(false);
            
            //2) Get all transfer requests and route them to peer
            Request requestToTransfer = forwardAttache.getRequestToTransfer();
            while (requestToTransfer != null) {
                s_logger.debug("Forwarding request " + requestToTransfer.getSequence() + " held in transfer attache " + hostId + " from the management server " + _nodeId + " to " + futureOwnerId);
                boolean routeResult = routeToPeer(Long.toString(futureOwnerId), requestToTransfer.getBytes());
                if (!routeResult) {
                    logD(requestToTransfer.getBytes(), "Failed to route request to peer");
                }
                
                requestToTransfer = forwardAttache.getRequestToTransfer();
            }

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                    if (Request.isControl(data)) {
                        if (agent == null) {
                            logD(data, "No attache to process cancellation");
                            return;
                        }
                        Request req = Request.parse(data);
                        Command[] cmds = req.getCommands();
                        CancelCommand cancel = (CancelCommand) cmds[0];
                        if (s_logger.isDebugEnabled()) {
                            logD(data, "Cancel request received");
                        }
                        agent.cancel(cancel.getSequence());
                        return;
                    }


                    try {
                        if (agent == null || agent.isClosed()) {
                            throw new AgentUnavailableException("Unable to route to agent ", hostId);
                        }


                        if (Request.isRequest(data) && Request.requiresSequentialExecution(data)) {
                            // route it to the agent.
                            // But we have the serialize the control commands here so we have
                            // to deserialize this and send it through the agent attache.
                            Request req = Request.parse(data);
                            agent.send(req, null);
                            return;
                        } else {
                            if (agent instanceof Routable) {
                                Routable cluster = (Routable) agent;

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                        s_logger.debug("Ping from " + _id);
                    }
                    long seq = _seq++;


                    if (s_logger.isTraceEnabled()) {
                        s_logger.trace("SeqA " + _id + "-" + seq + ": " + new Request(_id, -1, cmd, false).toString());
                    }


                    _mgr.handleCommands(DirectAgentAttache.this, seq, new Command[]{cmd});
                } else {
                    s_logger.debug("Unable to send ping because agent is disconnected " + _id);

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        s_logger.info("Stopping the agent: Reason = " + reason + (detail != null ? ": Detail = " + detail : ""));
        if (_connection != null) {
            final ShutdownCommand cmd = new ShutdownCommand(reason, detail);
            try {
                if (_link != null) {
                    Request req = new Request((_id != null ? _id : -1), -1, cmd, false);
                    _link.send(req.toBytes());
                }
            } catch (final ClosedChannelException e) {
                s_logger.warn("Unable to send: " + cmd.toString());
            } catch (Exception e) {
                s_logger.warn("Unable to send: " + cmd.toString() + " due to exception: ", e);

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        for (int i = 0; i < startup.length; i++) {
            setupStartupCommand(startup[i]);
            commands[i] = startup[i];
        }


        final Request request = new Request(_id != null ? _id : -1, -1, commands, false, false);
        request.setSequence(getNextSequence());


        if (s_logger.isDebugEnabled()) {
            s_logger.debug("Sending Startup: " + request.toString());
        }
        synchronized (this) {
            _startup = new StartupTask(link);
            _timer.schedule(_startup, _startupWait);
        }
        try {
            link.send(request.toBytes());
        } catch (final ClosedChannelException e) {
            s_logger.warn("Unable to send reques: " + request.toString());
        }
    }

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com.cloud.agent.Agent$AgentRequestHandler

com.cloud.agent.Agent$ServerHandler

com.cloud.agent.manager.AgentAttache

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com.cloud.agent.manager.AgentManagerImpl$AgentHandler

com.cloud.agent.manager.ClusteredAgentManagerImpl

com.cloud.agent.manager.ClusteredAgentManagerImpl$ClusteredAgentHandler

com.cloud.agent.manager.ClusteredDirectAgentAttache

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