Request-Reply

NATS supports this pattern with its core communication mechanism, publish and subscribe. A request is published on a given subject with a reply subject, and responders listen on that subject and send responses to the reply subject. Reply subjects are unique subjects called inbox that are dynamically directed back to the requestor, regardless of location of either party.

The power of NATS even allows multiple responses where the first response is utilized and the system efficiently discards the additional ones. This allows for a sophisticated pattern to have multiple responders reduce response latency and jitter.

Try NATS request reply on your own, using a live server by walking through the request/reply tutorial.