Graceful shutdown of supervised GenServer

Questions / Help
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5

I read that having a GenServer monitor the shutdown of other GenServers is a common pattern.

But it seemed strange to me to have a GenServer to help my Supervisor supervising…

I ended up passing the Supervisor’s pid as a init arg to the Genservers and if I got {:error, :econnrefused} when trying to connect to the TCP socket, I close the Supervisor with Supervisor.stop\1

 @impl true
  def handle_info(:connect, state = %{:config => config, :supervisor => supervisor}) do
    IO.puts("connecting")

    case connect(config) do
      {:ok, socket} ->
        Process.send_after(self(), :read_data, 1)
        new_state = Map.put(state, :socket, socket)
        {:noreply, new_state}

      {:error, :econnrefused} ->
        :ok = Supervisor.stop(supervisor)
        {:noreply, state}
    end
  end

On all other errors I let it crash :exclamation:

Feel free to suggest better patterns to this :+1: