When an application sends a request and expects a response from a receiver, create two channels one for the request and one for the response.
To demonstrate NATS request/reply.
- Get and run nats-rply:
go get github.com/nats-io/go-nats-examples/tools/nats-rply nats-rply -s demo.nats.io subject "my response" - Get and run nats-req:
go get github.com/nats-io/go-nats-examples/tools/nats-req nats-req -s demo.nats.io subject "my request" - Verify requester output:
Published [subject] : 'my request' Received [_INBOX.5cE7rtqAFLWkhaLEawkBqL] : 'my response' - Verify queue reply output:
Listening on [subject] [#1] Received on [subject]: 'my request'
Now that you've seen how it works, try running multiple nats-rply and sending multiple messages. For each request, a random queue responder will be selected and at most one response will be sent back to the client.