question: how to avoid processing the same message multiple times about dramatiq

[Bogdanp]

There is a Gitter here but I'm the only one on it. I should add it to the README. :D

I could use a concrete example here because I'm having trouble understanding exactly what you're asking. One message will only be delivered to one worker, unless it fails and gets retried, but then even the retries will each make it to one worker at a time.

If you want a specific actor to only process one message at a time, then yes, you can use a distributed lock (check out the docs here: https://dramatiq.io/cookbook.html#rate-limiting).

[ericgj]

I think RabbitMQ gives you this guarantee with direct as opposed to fanout exchanges? (And presumably the Redis broker does too although I'm not as familiar with it.)

[Bogdanp]

I'm closing this for now. @MattBlack85 feel free to re-open it if your question wasn't answered.