broadway_default.exs

defmodule MyBroadway do
  # behaviour impl, aliases and imports ...
  
  def start_link(_opts) do
    Broadway.start_link(__MODULE__,
      name: __MODULE__,
      producer: [
        # producer configuration
      ],
      processors: [
        default: [concurrency: 1]
      ],
      batchers: [
        default: [concurrency: 1]
      ]
    )
  end
  # handler methods ..
end