When/Where to call self.update_from_feed_continuously?

Just a quick question. After watching RailsCasts ep #168 and coming across the following code:

class FeedEntry < ActiveRecord::Base
  def self.update_from_feed(feed_url)
    feed = Feedzirra::Feed.fetch_and_parse(feed_url)
    add_entries(feed.entries)
  end

  def self.update_from_feed_continuously(feed_url, delay_interval = 15.minutes)
    feed = Feedzirra::Feed.fetch_and_parse(feed_url)
    add_entries(feed.entries)
    loop do
      sleep delay_interval
      feed = Feedzirra::Feed.update(feed)
      add_entries(feed.new_entries) if feed.updated?
    end
  end

  private

  def self.add_entries(entries)
    entries.each do |entry|
      unless exists? :guid => entry.id
        create!(
          :name         => entry.title,
          :summary      => entry.summary,
          :url          => entry.url,
          :published_at => entry.published,
          :guid         => entry.id
        )
      end
    end
  end
end

I'm asking myself where/when should I call the method self.update_from_feed_continuously(blah, blah)? Is it going to be in my Feed Controller, or a View (ie Index, show, etc..)

Any help is much appreciated. This question has been bugging me for a while...

It is just a method to fetch feeds from the input url continuously.

It can be called at anywhere, it depended on the situation.

When you submit the feed url through controller, then call the method in controller.

When you decide that the feed task should be run regularly, then it can be called by a rake task through whenever, https://github.com/javan/whenever