Designing Elixir Systems with OTP/

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Adding Notifications to Mastery and the Boundary

Adding Notifications to Mastery and the Boundary

Let’s start working on the notifications to start and end our quizzes.

We'll cover the following...

Adding a notification to start the quiz

Let’s add the notification to start_quiz in proctor.ex:

  def start_quiz(quiz, now) do
    Logger.info "Starting quiz #{quiz.fields.title}..."
    notify_start(quiz)
    QuizManager.build_quiz(quiz.fields)
    Enum.each(quiz.templates, &add_template(quiz, &1))
    timeout = DateTime.diff(quiz.end_at, now, :millisecond)
    Process.send_after(
      self(), 
      {:end_quiz, quiz.fields.title, quiz.notify_pid}, 
      timeout)
  end

In start_quiz, we have two changes to make:

  • After we log the start of the quiz, we call our new notify_start function, where we’ll do the notification via send.

  • Next, ...