sample elixir server client

server-client

defmodule Server do
  def start(callback_module) do
    spawn fn ->
      callback_module |> run
    end
  end

  def run(callback_module) do
    receive do
      message ->
        message |> callback_module.handle_message
        callback_module |> run
    end
  end
end

defmodule Client do
  def handle_message("ping"), do: IO.puts("pong")
  def handle_message("pong"), do: IO.puts("ping")
  def handle_message(_other), do: IO.puts("Not playing this game! ¯\_(ツ)_/¯")
end

# server = Server.start Client
# send server, "ping" -> returns "pong"
# send server, "pong" -> returns "ping"
# send server, "blah" -> returns "Not playing this game! ¯\_(ツ)_/¯"