# File lib/clockwork/manager.rb, line 83
    def handle_signal(sig)
      logger.debug "Got #{sig} signal"
      case sig
      when 'INT'
        shutdown
      when 'TERM'
        # Heroku sends TERM signal, and waits 10 seconds before exit
        graceful_shutdown
      when 'HUP'
        graceful_shutdown
      end
    end