Package org.zeromq

Examples of org.zeromq.ZFrame

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            ZHelper.setId (worker);     //  Set a printable identity

            worker.connect("ipc://backend.ipc");

            //  Tell backend we're ready for work
            ZFrame frame = new ZFrame (WORKER_READY);
            frame.send (worker, 0);

            while(true)
            {
                ZMsg msg = ZMsg.recvMsg (worker);
                if (msg == null)
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        public int handle(ZLoop loop, PollItem item, Object arg_) {

            LBBroker arg = (LBBroker)arg_;
            ZMsg msg = ZMsg.recvMsg(arg.backend);
            if (msg != null) {
                ZFrame address = msg.unwrap();
                //  Queue worker address for load-balancing
                arg.workers.add(address);

                //  Enable reader on frontend if we went from 0 to 1 workers
                if (arg.workers.size() == 1) {
                    PollItem newItem = new PollItem (arg.frontend, ZMQ.Poller.POLLIN);
                    loop.addPoller (newItem, frontendHandler, arg);
                }

                //  Forward message to client if it's not a READY
                ZFrame frame = msg.getFirst();
                if (Arrays.equals (frame.getData(), WORKER_READY))
                    msg.destroy();
                else
                    msg.send(arg.frontend);
            }
            return 0;
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    boolean isNewMsg = MSG_UPD.compareAndSet(this, null, new ZMsg());
    ZMsg msg = MSG_UPD.get(this);
    if (isNewMsg) {
      switch (socket.getType()) {
        case ZMQ.ROUTER:
          msg.add(new ZFrame(connectionId));
          break;
        default:
      }
    }
    msg.add(new ZFrame(bytes));

    if (flush) {
      doFlush(onComplete);
    }
  }
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                    break; // Interrupted
                if (items.pollin(0)) {
                    ZMsg msg = ZMsg.recvMsg(frontend);
                    if (msg == null)
                        break; // Interrupted
                    ZFrame address = msg.pop();
                    address.destroy();
                    msg.addFirst(new ZFrame("W"));
                    msg.send(backend);
                }
                if (items.pollin(1)) {
                    ZMsg msg = ZMsg.recvMsg(backend);
                    if (msg == null)
                        break; // Interrupted
                    ZFrame address = msg.pop();
                    address.destroy();
                    msg.addFirst(new ZFrame("C"));
                    msg.send(frontend);
                }
            }
            ctx.destroy();
        }
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                    if (!doTheWork(cycles++))
                        break; // crashed
                    liveness = HEARTBEAT_LIVENESS;
                    msg.send(worker);
                } else if (msg.size() == 1) { // heartbeat
                    ZFrame frame = msg.getFirst();
                    if (Arrays.equals(frame.getData(), PPP_HEARTBEAT)) {
                        liveness = HEARTBEAT_LIVENESS;
                    } else {
                        System.out.printf("E: invalid message (%s)\n",
                                frame.toString());
                    }
                    frame.destroy();
                } else {
                    System.out.printf("E: invalid message (%s)\n",
                            msg.toString());
                }
                interval = INTERVAL_INIT;
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                ZMsg msg = ZMsg.recvMsg(backend);
                if (msg == null)
                    break; // Interrupted

                // Any sign of life from worker means it's ready
                ZFrame address = msg.unwrap();
                workers.workerReady(new Worker(address));

                // Validate control message, or return reply to client
                if (msg.size() == 1) {
                    ZFrame frame = msg.getFirst();
                    if (!(Arrays.equals(frame.getData(), PPP_HEARTBEAT) || Arrays
                            .equals(frame.getData(), PPP_READY))) {
                        System.out.printf("E: invalid message from worker "
                                + msg.toString());
                    }
                    msg.destroy();
                } else
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                if (verbose) {
                    log.format("I: received message:\n");
                    msg.dump(log.out());
                }

                ZFrame sender = msg.pop();
                ZFrame empty = msg.pop();
                ZFrame header = msg.pop();

                if (MDP.C_CLIENT.frameEquals(header)) {
                    processClient(sender, msg);
                } else if (MDP.W_WORKER.frameEquals(header))
                    processWorker(sender, msg);
                else {
                    log.format("E: invalid message:\n");
                    msg.dump(log.out());
                    msg.destroy();
                }

                sender.destroy();
                empty.destroy();
                header.destroy();

            }
            purgeWorkers();
            sendHeartbeats();
        }
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    /**
     * Process a request coming from a client.
     */
    private void processClient(ZFrame sender, ZMsg msg) {
        assert (msg.size() >= 2); // Service name + body
        ZFrame serviceFrame = msg.pop();
        // Set reply return address to client sender
        msg.wrap(sender.duplicate());
        if (serviceFrame.toString().startsWith(INTERNAL_SERVICE_PREFIX))
            serviceInternal(serviceFrame, msg);
        else
            dispatch(requireService(serviceFrame), msg);
        serviceFrame.destroy();
    }
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     * Process message sent to us by a worker.
     */
    private void processWorker(ZFrame sender, ZMsg msg) {
        assert (msg.size() >= 1); // At least, command

        ZFrame command = msg.pop();

        boolean workerReady = workers.containsKey(sender.strhex());

        Worker worker = requireWorker(sender);

        if (MDP.W_READY.frameEquals(command)) {
            // Not first command in session || Reserved service name
            if (workerReady
                    || sender.toString().startsWith(INTERNAL_SERVICE_PREFIX))
                deleteWorker(worker, true);
            else {
                // Attach worker to service and mark as idle
                ZFrame serviceFrame = msg.pop();
                worker.service = requireService(serviceFrame);
                workerWaiting(worker);
                serviceFrame.destroy();
            }
        } else if (MDP.W_REPLY.frameEquals(command)) {
            if (workerReady) {
                // Remove & save client return envelope and insert the
                // protocol header and service name, then rewrap envelope.
                ZFrame client = msg.unwrap();
                msg.addFirst(worker.service.name);
                msg.addFirst(MDP.C_CLIENT.newFrame());
                msg.wrap(client);
                msg.send(socket);
                workerWaiting(worker);
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            returnCode = services.containsKey(name) ? "200" : "400";
        }
        msg.peekLast().reset(returnCode.getBytes());
        // Remove & save client return envelope and insert the
        // protocol header and service name, then rewrap envelope.
        ZFrame client = msg.unwrap();
        msg.addFirst(serviceFrame.duplicate());
        msg.addFirst(MDP.C_CLIENT.newFrame());
        msg.wrap(client);
        msg.send(socket);
    }
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Related Classes of org.zeromq.ZFrame

  • asyncsrv$server_worker
  • com.spotify.netty.handler.codec.zmtp.ZMTPFrameIntegrationTest
  • espresso$Listener
  • flserver2
  • flserver3
  • lbbroker3$BackendHandler
  • lbbroker3$WorkerTask
  • lvcache
  • mdbroker
  • mdcliapi
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