Supervising async tasks

Questions & Help Questions
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I need to:

  • do some asynchronous work concurrently
  • kill the work when the parent GenServer exits
  • be able to specify the timeout
  • do some bookkeeping when the work succeeds
  • do some other bookkeeping when the work fails

Is the Task.Supervisor the right tool for the job?

I’m thinking of writing a GenServer that would use Task.Supervisor.async_nolink to start Tasks, specifying the :shutdown option and handling the {ref, result} and :DOWN messages.

But how do I make sure that the tasks are immediately terminated when the GenServer is shut down? I guess Task.Supervisor.async is what I should use. But how will I get the results/crashes? Am I going to receive the same messages as with async_nolink?