mosquittopp with MQTT v5 RPC Response Topics

[sdettmer]

Hi,

I'm trying to use MQTT v5 RPC Response Topics with Mosquitto. There is a mosquitto_rr tool supporting it, so I assume the mosquitto lib suopport it (via mosquitto_subscribe_v5 / mosquitto_subscribe_multiple), however I find no way to call it via mosquittopp. I cannot even implement in a child class, because unfortunately the struct mosquitto *m_mosq; is private:.

What do I do wrongly?

In case it is not possibly, I suggest to:

1. add the missing functionality to mosquittopp
2. verify other missing functionality (I guess, all properties-aware functionality could be missing)
3. make struct mosquitto *m_mosq; to be protected: or add a protected: accessor (getter).

I think I'm missing a point, because missing properties would make mosquittopp not MQTT v5 compliant I think, so maybe it is not maintained (?) and nobody is using it? Also the documentation https://mosquitto.org/api/files/cpp/mosquittopp-h.html is quite brief and contains DEPRECATED. Is mosquittopp deprecated, and if so, by what?

Would it be welcome to propose patches?

Regards,
Steffen

[ralight]

mosquittopp was deprecated because I saw approximately zero use, was extra burden to maintain, was only an extremely thin wrapper around the C library, and the Paho C++ library provided a better C++ experience. After suggesting it was deprecated, there was sufficient interest to reverse the decision - the API documentation is out of date by a reasonable while in that regard.

The C++ wrapper has been updated in the develop branch - I'd be grateful if you gave it a try and reported back if it is all working for you.

[vimpostor]

I'd be grateful if you gave it a try and reported back if it is all working for you.

I tested the C++ bindings and they seem to be working fine.