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Explore NATS Request/Reply
NATS supports request/reply messaging. In this tutorial you explore how to exchange point-to-point messages using NATS.

Prerequisites

Go and the NATS server should be installed.

1. Start the NATS server

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% nats-server
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2. Start two terminal sessions

You will use these sessions to run the NATS request and reply clients.

3. Change to the examples directory

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% cd $GOPATH/src/github.com/nats-io/nats.go/examples
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4. In one terminal, run the reply client listener

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% go run nats-rply/main.go help.please "OK, I CAN HELP!!!"
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You should see the message: Listening on [help.please]
This means that the NATS receiver client is listening for requests messages on the "help.please" subject. In NATS, the receiver is a subscriber.

5. In the other terminal, run the request client

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% go run nats-req/main.go help.please "I need help!"
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The NATS requestor client makes a request by sending the message "I need help!" on the “help.please” subject.
The NATS receiver client receives the message, formulates the reply ("OK, I CAN HELP!!!"), and sends it to the inbox of the requester.
Last modified 1yr ago