Throttler

[![travis] 1] 2

Throttler rate-limits code execution across threads, evented blocks, or processes on a server.

Throttler works only on platforms that support file locking.

# Gemfile
gem 'throttler'

The following background job ensures workers will not scrape a site faster than once every second per IP address.

class Scrape
  def self.perform(site, ip_address, *ids)
    Throttler.limit 1.0, site, ip_address do
      spider = Spider.new site, ip_address
      spider.scrape *ids
    end
  end
end