easy-going-rails/app/controllers/hot_controller.rb

class HotController < ApplicationController
  def index
    session[:toto1] = session[:toto1].nil? ? "id##{Random.rand(10)}" : nil
    logger.info('callee')
    logger.info(__callee__)
    logger.info(__method__)

    # logger.info(ActiveSupport::LogSubscriber.subscribers.map(&:patterns))
    logger.info(ActiveSupport::Notifications.notifier.listeners_for('.*\.action_controller'))
  end
end