Multi-namespace cache handler

gistfile1.rb

class MultiCache
  include Singleton

  attr_reader :rails_cache, :custom_cache

  def initialize
    @rails_cache = Rails.cache
    @custom_cache = ActiveSupport::Cache::MemCacheStore.new(
      'your-cache-ip-address', :namespace => 'rails4-namespace')
  end

  def self.delete(key)
    instance.delete(key)
  end

  # this will allow our MemoryCache to be called just like Rails.cache
  # every method passed to it will be passed to our MemoryStore
  def method_missing(m, *args, &block)
    rails_cache.send(m, *args, &block)
    custom_cache.send(m, *args, &block)
  end

end