Learn Elixir: OTP, GenServers, Agents, & Tasks

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[@armanmirk]

Thank you for putting these videos together. It's very handy to see these concepts succinctly expressed specially because they are very unique at least to folks with conventional programming knowledge.

[@armanmirk]

I have a suggestion which is to consider explaining Agents, GenServer and Tasks within the context of something like a Phoenix app. There are two advantages to that form of explainations: 1) most devs these days are web developers and they want to understand the circumstances that make either of these constructs useful within a web app environment and 2) it would be good to understand the limitations of these constructs if your Phoenix website has to deal with a large volume of requests which should hopefully teach something about how to structure things to avoid bottlenecks. I hope this makes sense.

[@pupdoggify]

I've been looking for the same info and yet no one seems to care about explaining it in such context...waiting...

[@simonkistler6468]

And for what exactly are you using the genserver for your website? Phoenix uses genservers , but for a simple website you don't need to implement one at your own.

[@gettyorawo4371]

awesome stuff!

[@johnneiberger7311]

I'm not clear on how to use a GenServer. Are we supposed to call all those functions separately from another module? It seemed like you said that calling start_link will automatically call init, but I don't see how that works, and I don't understand how the state is passed from start_link to init. And if we configure a handle_call or handle_cast function, how do we interact with that from another function? Do we have some standard way to cast or call a process and it just knows to use the appropriate function to deal with the incoming message?