インスタンスメソッドへHookの設定

instance_method_hook.rb

module Hook
  def increment
    super
    expire
  end
end


class Ranking
  prepend Hook
  attr_accessor :key
  
  def initialize(key)
    @key = key
  end
  def increment
    REDIS.zincrby(key, 1)
  end
  
  def expire(day = 31)
    REDIS.expire(key, day.days.to_i)
  end
end