Emitter Publisher-Subscriber Matrix

[omidkrad]

Hi, I put together this Publisher-Subscriber Matrix to better understand how subscriptions and filtering work in Emitter.

First column is channel to publish to
First row is channel that subscriber is listening to
✔️ Subscriber will receive the message
❌ Subscriber won't receive the message

Publish to ⬇️ / Subscriber ➡️	C	C/A	C/+	C/A/B	C/+/B	C/D
C	✔️	❌	❌	❌	❌	❌
C/A	✔️	✔️	✔️	❌	❌	❌
C/A/B	✔️	✔️	❌	✔️	✔️	❌
C/D	✔️	❌	✔️	❌	❌	✔️
C/D/B	✔️	❌	❌	❌	✔️	✔️

Can you please verify if this is correct? It would be very helpful if we can add something like this to the documentation. Thanks!

[VladimirAkopyan]

are you just trying to figure out how MQTT topics work, or something specific to emitter? This diagram is very confusing .
If you are trying to get general understanding of topics, I think this is a good guide - http://www.hivemq.com/blog/mqtt-essentials-part-5-mqtt-topics-best-practices

[omidkrad]

Thanks for the link, it was useful. I added a legend to the table above to make it more clear.

[VladimirAkopyan]

That seems correct to me

[kelindar]

@omidkrad thanks for the suggestion, added here: https://emitter.io/develop/message-filtering