CacheAPIWrapper

common_cache.rb

class CommonCache
  def initialize(prefix, expire)
    @prefix = prefix
    @expire = expire
  end

  def key(id)
    "#{@prefix}_#{id}"
  end

  def read(id)
    Rails.cache.read(key(id))
  end

  def write(id, value)
    Rails.cache.write(key(id), value, expires_in: @expire)
  end

  def fetch(id, &block)
    Rails.cache.fetch(key(id), expires_in: @expire, &block)
  end
end

json_cache.rb

class JsonCache < CommonCache
  def read(id)
    res = super(id)
    res && JSON.load(res, symbolize_names: true)
  end

  def write(id, value)
    super(id, JSON.dump(value))
  end

  def fetch(id, &block)
    res = super(id) do
      JSON.dump(block.call)
    end
    JSON.load(res)
  end
end