Declare the queue

        When completed, the on_queue_declareok method will be invoked by pika.

def setup_queue(self):
        """Declare the queue

        When completed, the on_queue_declareok method will be invoked by pika.
        """
        logger.debug("Declaring queue %s" % self._queue)
        self._channel.queue_declare(self.on_queue_declareok, self._queue, durable=True)