monkey patch on delayed_job 2.1.4 to propagate sigquit exceptions into application code

gistfile1.rb

module Delayed
  class Worker
    def start
      say "Starting job worker"

      trap('TERM') { $exit = true; raise SignalException.new("TERM")}
      trap('INT')  { say 'Exiting...'; $exit = true }

      loop do
        result = nil

        realtime = Benchmark.realtime do
          result = work_off
        end

        count = result.sum

        break if $exit

        if count.zero?
          sleep(self.class.sleep_delay)
        else
          say "#{count} jobs processed at %.4f j/s, %d failed ..." % [count / realtime, result.last]
        end

        break if $exit
      end

    ensure
      Delayed::Job.clear_locks!(name)
    end
  end
end