Flow based programming in elixir

If you use Supervision tree you have - you guessed it, tree. Maybe that’s a partial solution?

The quick answer is yes. How would you use this graph flow based programming ?

@tty, I basically want to create REST API’s using the graphs.

Take a look at the flow library. It might provide the tools you are looking for .

flow isn’t related to the FBP paradigm

I still don’t quite get it. Are you intending each graph node as a state ? The edges as transitions to that state ?

I want to create something like this

Each node being a function

Yes that looks very possible. If each node is a function you have the choice of having an Elixir process handle one function or you can mimic all of these within a FSM. Unfortunately Elixir doesn’t have a corresponding Erlang gen_fsm / gen_statem and will have to use the Erlang behaviours.

I think state machines aren’t the answer to this. As we might me dealing with a function which requires more than one input argument, and they are waiting for the output from a different node, which can be of asynchronous nature.

Ok. Go with GenServer to begin with and model a simple system. It looks very doable.