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.

        }
    }


    @Override
    public AgentControlAnswer sendRequest(AgentControlCommand cmd, int timeoutInMilliseconds) throws AgentControlChannelException {
        Request request = new Request(this.getId(), -1, new Command[] { cmd } , true, false);
        request.setSequence(getNextSequence());


        AgentControlListener listener = new AgentControlListener(request);


        registerControlListener(listener);
        try {

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        }
    }


    @Override
    public void postRequest(AgentControlCommand cmd) throws AgentControlChannelException {
        Request request = new Request(this.getId(), -1, new Command[] { cmd } , true, false);
        request.setSequence(getNextSequence());
        postRequest(request);
    }

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              super(type, link, req);
          }


        @Override
        protected void doTask(Task task) throws Exception {
            Request req = (Request)this.get();
            if (!(req instanceof Response)) {
                processRequest(req, task.getLink());
            }
        }

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            if (task.getType() == Task.Type.CONNECT) {
                _shell.getBackoffAlgorithm().reset();
                setLink(task.getLink());
                sendStartup(task.getLink());
            } else if (task.getType() == Task.Type.DATA) {
                Request request;
                try {
                    request = Request.parse(task.getData());
                    if (request instanceof Response) {
                        //It's for pinganswer etc, should be processed immediately.
                        processResponse((Response) request, task.getLink());

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        final AgentAttache agent = getAttache(hostId);
        if (agent == null || agent.isClosed()) {
            throw new AgentUnavailableException("agent not logged into this management server", hostId);
        }


        Request req = new Request(hostId, agent.getName(), _nodeId, cmds, commands.stopOnError(), true);
        req.setSequence(agent.getNextSequence());
        Answer[] answers = agent.send(req, timeout);
        notifyAnswersToMonitors(hostId, req.getSequence(), answers);
        commands.setAnswers(answers);
        return answers;
    }

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        assert cmds.length > 0 : "Why are you sending zero length commands?";
        if (cmds.length == 0) {
            throw new AgentUnavailableException("Empty command set for agent " + agent.getId(), agent.getId());
        }
        Request req = new Request(hostId, agent.getName(), _nodeId, cmds, commands.stopOnError(), true);
        req.setSequence(agent.getNextSequence());


        agent.send(req, listener);
        return req.getSequence();
    }

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            }
        }


        try {
            if (attache == null) {
                final Request readyRequest = new Request(-1, -1, ready, false);
                link.send(readyRequest.getBytes());
            } else {
                easySend(attache.getId(), ready);
            }
        } catch (Exception e) {
            s_logger.debug("Failed to send ready command:" + e.toString());

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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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        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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