MQTT Client Id

[Leo Chan]

Using the MQTT plugin, does anyone know if it is possible to propagate the client id to the AMQP message user_id field?

I have a use case where I need to be able to identify the publisher of an MQTT message. Another possible way to solve this is to limit which topics a publisher can publish to.

Has anyone else come across any similar use cases and solutions?

Thanks in advance.

Leo

[Jesse Trana]

I was wondering about this recently too. I came to the conclusion that I don't think that information is being propagated in any way from MQTT to AMQP after looking at the source: https://github.com/rabbitmq/rabbitmq-mqtt/blob/master/src/rabbit_mqtt_processor.erl#L615 and at this older message that seems to indicate that at least at the beginning it did not propagate either: https://github.com/rabbitmq/rabbitmq-mqtt/issues/8

I personally would like to see this added as a feature. I have to imagine that many of us would like to be able to use the client id to feed into something like consistent hash exchange for IoT types of applications...

[Jesse Trana]

Also, I think you'll have better luck here: https://groups.google.com/forum/#!forum/rabbitmq-users