public function startWorker($zProgramId, $aProducer_host, $bProducer_port, $cControl_port)
    {
        set_time_limit(0);

        $this->initialiseProgramSettings($zProgramId);
        // Connect to the control + producer socket (Unique per program)
        $control = $this->getZmqContext()->getSocket(ZMQ::SOCKET_SUB);
        //$control->setSockOpt(ZMQ::SOCKOPT_SUBSCRIBE, '');
        echo 'Connecting worker ' . getmypid() . ' to control socket at tcp://' . $aProducer_host . ':' . $cControl_port . PHP_EOL;
        $control->connect('tcp://' . $aProducer_host . ':' . $cControl_port);
        echo 'Connected' . PHP_EOL;
        $producer = $this->getZmqContext()->getSocket(ZMQ::SOCKET_PULL);
        echo 'Connecting worker ' . getmypid() . ' to producer socket at tcp://' . $aProducer_host . ':' . $bProducer_port . PHP_EOL;
        $producer->connect('tcp://' . $aProducer_host . ':' . $bProducer_port);
        echo 'Connected' . PHP_EOL;

        $poll = new ZMQPoll();
        $poll->add($producer, ZMQ::POLL_IN);
        $poll->add($control, ZMQ::POLL_IN);
        $read = $write = array();

        while(true)
        {
            try {
                // Don't set the timeout to -1, this will hang and prevent a lookup on the control port
                $event = $poll->poll($read, $write, 5000);
            } catch (\ZMQPollException $e)
            {
                echo $e->getMessage();
            }

            // Start scanning for events on the poll
            if($event)
            {
                foreach ($read as $read_socket)
                {
                    if ($read_socket === $producer)
                    {
                        echo 'It happened on the producer socket' . PHP_EOL;
                        $this->processRecords(json_decode($producer->recv(), true));
                    }

                    if ($read_socket === $control)
                    {
                        $ctlMessage = $control->recv(ZMQ::MODE_NOBLOCK);
                        echo 'Control message received' . PHP_EOL;
                        switch ($ctlMessage)
                        {
                            case System_ProgramDataWorker::WORKER_CONTROL_TERMINATE:
                                echo "Received a termination command on the control socket, closing worker: " . getmypid() . PHP_EOL;
                                exit();
                                break;
                        }
                    }
                }

            }

        }
    }