How to set rufus scheduler affinity to first worker thread in puma

puma_rufus_scheduler.rb

## in config/puma.rb
on_worker_boot do |worker_number|

  # only create scheduler on first worker thread
  if worker_number === 0
    $scheduler_thread = true
  end
end

## in config/initializers/scheduler.rb
if $scheduler_thread
  Rails.logger.info "Created rufus scheduler"
  scheduler = Rufus::Scheduler.new 
  ## add scheduler stuff
end

## will only ever get 1 Rails.logger.info message :)

Is this working? I do not get any logger messages.