I need to perform long-running operation in ruby/rails asynchronously. Googling around one of the options I find is Sidekiq.

class WeeklyReportWorker
  include Sidekiq::Worker

  def perform(user, product, year = Time.now.year, week = Date.today.cweek)
    report = WeeklyReport.build(user, product, year, week)
    report.save
  end
end

# call WeeklyReportWorker.perform_async('user', 'product')

Everything works great! But there is a problem.

If I keep calling this async method every few seconds, but the actual time heavy operation performs is one minute things won't work.

Let me put it in example.

5.times { WeeklyReportWorker.perform_async('user', 'product') }

Now my heavy operation will be performed 5 times. Optimally it should have performed only once or twice depending on whether execution of first operaton started before 5th async call was made.

Do you have tips how to solve it?