defmodule App do
  use Application

  defmodule SampleWorker do
    @moduledoc false

    use GenServer

    @this_module __MODULE__

    def start_link(opts), do: GenServer.start_link(@this_module, opts)

    @impl true
    def init(opts) do
      # Maintain init opts in state for later introspection.
      {:ok, opts}
    end
  end

  def start(_type, _args) do
    pool_opts = [
      name: SampleWorkerPool,
      worker_count: 3,
      worker_module: SampleWorker
    ]

    worker_opts = [ref: make_ref()]

    children = [
      PoolLad.child_spec(pool_opts, worker_opts)
    ]

    opts = [strategy: :one_for_one, name: App.Supervisor]
    Supervisor.start_link(children, opts)
  end
end