class LHC::Caching::MultilevelCache

def fetch(key)
  central_response = @central[:read].fetch(key) if @central && @central[:read].present?
  if central_response
    puts %Q{[LHC] served from central cache: "#{key}"}
    return central_response
  end
  local_response = @local.fetch(key) if @local
  if local_response
    puts %Q{[LHC] served from local cache: "#{key}"}
    return local_response
  end
end

def initialize(central: nil, local: nil)
  @central = central
  @local = local
end

def write(key, content, options)
  @central[:write].write(key, content, options) if @central && @central[:write].present?
  @local.write(key, content, options) if @local.present?
end