Rails Scoped Cache allows seamless usage of cache island that can be deleted at once. Also default expiration could be achieved by cache options. Further reference: http://quickleft.com/blog/faking-regex-based-cache-keys-in-rails

scoped_cache.rb

class ScopedCache
  attr_reader :name

  def initialize(cache, name, options = nil)
    @cache = cache
    @name = name
    @options = options
  end

  def read(key)
    @cache.read(scoped_key(key))
  end

  def write(key, value)
    @cache.write(scoped_key(key), @options)
  end

  def fetch(key)
    @cache.fetch(scoped_key(key), @options) do
      yield
    end
  end

  def clear
    increment_scope_iteration
  end

  private

  def scoped_key(key)
    [name, scope_iteration, key]
  end

  def scope_iteration
    @cache.fetch([name, :iteration]) do
      1
    end
  end

  def increment_scope_iteration
    @cache.write([name, :iteration], scope_iteration +  1)
  end

end


module ActiveSupport
  module Cache
    class Store
      def scoped(name, options = nil)
        ScopedCache.new self, name, options
      end
    end
  end
end