yugo_supervisor.ex

defmodule MyApp.YugoSupervisor do
  use Supervisor
  require Logger

  def start_link(init_arg) do
    Supervisor.start_link(__MODULE__, init_arg, name: __MODULE__)
  end

  @impl true
  def init(_init_arg) do
    Logger.info("Initializing YugoSupervisor")
    yugo_config = Application.fetch_env!(:myapp_ex, :yugo)

    children = [
      # IMAP Client specification
      %{
        id: Yugo.ScreenerClient,
        start:
          {Yugo.Client, :start_link,
           [
             [
               name: :yugo_client,
               server: yugo_config[:server],
               username: yugo_config[:username],
               password: yugo_config[:password],
               mailbox: yugo_config[:mailbox],
               ssl_verify: yugo_config[:ssl_verify]
             ]
           ]},
        restart: :permanent,
        shutdown: 5_000,
        restart_delay: 3_000,
        type: :worker
      },
      {MyApp.MailProcessor, Application.fetch_env!(:myapp_ex, MyApp.MailProcessor)}
    ]

    # :rest_for_one means if a child process terminates, all siblings are restarted too
    # max_restarts: 3 means allow 3 restarts
    # max_seconds: 5 means within a 5 second window
    Supervisor.init(children, strategy: :rest_for_one, max_restarts: 3, max_seconds: 5)
  end
end