global

def start(launcher)
  require_relative '../sd_notify'
  launcher.log_writer.log "* Enabling systemd notification integration"
  # hook_events
  launcher.events.on_booted { Puma::SdNotify.ready }
  launcher.events.on_stopped { Puma::SdNotify.stopping }
  launcher.events.on_restart { Puma::SdNotify.reloading }
  # start watchdog
  if Puma::SdNotify.watchdog?
    ping_f = watchdog_sleep_time
    in_background do
      launcher.log_writer.log "Pinging systemd watchdog every #{ping_f.round(1)} sec"
      loop do
        sleep ping_f
        Puma::SdNotify.watchdog
      end
    end
  end
  # start status loop
  instance = self
  sleep_time = 1.0
  in_background do
    launcher.log_writer.log "Sending status to systemd every #{sleep_time.round(1)} sec"
    loop do
      sleep sleep_time
      # TODO: error handling?
      Puma::SdNotify.status(instance.status)
    end
  end
end