Dogpile Effect - read

dogpile_read.rb

def custom_read_dogpile(name, timestamp, options)
  result = Rails.cache.read(timestamp_key(name, timestamp))

  if result.blank?
    Rails.cache.write(name + ':refresh-thread', 0, raw: true, unless_exist: true, expires_in: 5.seconds)
    if Rails.cache.increment(name + ':refresh-thread') == 1
      result = nil
    else
      result = Rails.cache.read(name + ':last')
    end
  end
  result
end