queue.ex

defmodule Queue do
  use GenServer

  def start_link(queue, name) do
    GenServer.start(__MODULE__, queue, name: name)
  end

  # GenServer callbacks

  def handle_call(:get, _from, [item | queue]) do
    {:reply, item, queue}
  end

  def handle_cast({:add, item}, queue) do
    {:noreply, queue ++ [item]}
  end
end