Example task supervisor using a function handle in Elixir (nerves example)

application.ex

require Logger

defmodule TestNpn.Application do
  use Application

  alias Nerves.Networking

  @interface :eth0


  # See http://elixir-lang.org/docs/stable/elixir/Application.html
  # for more information on OTP Applications
  def start(_type, _args) do
    import Supervisor.Spec, warn: false

    # Define workers and child supervisors to be supervised
    children = [
      worker(Task, [fn -> init_network() end], restart: :transient, id: TestNerves.Application.Network),
    ]

    # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
    # for other strategies and supported options
    opts = [strategy: :one_for_one, name: TestNpn.Supervisor]
    Supervisor.start_link(children, opts)
  end

  def init_network() do
    Logger.info "Starting Networking:interface: #{inspect @interface} pid: #{inspect self()}"
    {:ok, _} = Networking.setup @interface
  end

end