Confused about publish implementation

[Sayanc93]

Hey there,

Thanks for making and maintaining this library. I'm confused about the publish implementation here. Exmqttc publish

Publish I think is async in nature in :emqttc. If the nature of it is async, why handle it using a GenServer.call and not GenServer.cast. I think the backpressure that call generates in the message queue for async publish here is unnecessary?

Please help me understand if I'm wrong in my approach here.

[timbuchwaldt]

Hey, sorry for the slow response. Given that I wrote this library ages ago I can't say for certain, but I think your reasoning regarding backpressure is correct. GenServer.casting the message might mean that the GenServer is busy doing other stuff and might be overloaded, in which case I would prefer the error being pushed out to the boundary as far as possible by blocking the operation.