api/sendEmail
to the
QStash. Later, if you want to send a Slack notification, you need to update the
serverless function adding another call to QStash to submit
api/sendNotification
. In this example, you need to update and redeploy the
Serverless function at each time you change (or add) the endpoints.
If you create a topic product-purchase
and produce messages to that topic in
the function, then you can add or remove endpoints by only updating the topic.
Topics give you freedom to modify endpoints without touching the backend
implementation.
Check here to learn how to publish
to topics.