title: Custom delivery-tag rabbitmq
body: <p>I want to receive streaming replies from RabbitMQ based on the publisher model. It's the only way I see that I can stream replies without having to use RPC. </p>
  
  <p>So I went ahead and tried to use the ack delivery-tag as the identifier of the item I just processed. But that gave me an error that such a delivery-tag does not exist. So, is it possible to manually set the delivery tag when sending a message to RabbitMQ?</p>
  
  <p>If not, is there another to achieve streaming updates/acknowledgements from consumer to producer without using rpc?</p>