gistfile1.rb

module Komariq
  def self.update_entries(criteria, action)
    while true
      needs_update = criteria.call
      count = needs_update.count
      if count > 0
        Rails.logger.info "#{count} feeds need to be updated"
        needs_update.each do |entry|
          begin
            Rails.logger.info "Feed #{feed.id} is going to be updated"
            start = Time.now
            action.call entry
            finish = Time.now
            time = finish - start
            Rails.logger.info "Feed #{feed.id} updated in #{time} seconds"
          rescue => e
            Rails.logger.info e.message
            Rails.logger.info e.backtrace.join("\n")
          end
        end
      else
        sleep 30
      end
    end
  end
end