module Redis::Props::Counter::ClassMethods

Public Instance Methods

counter(name, options={}, &blk) click to toggle source
counter description

@param name [type] [description] @param options={} [type] [description] @param block [description]

@return [type] [description]

# File lib/redis/props/counter.rb, line 18
def counter(name, options={}, &blk)
  register_redis_props(name, :counter, options)
  redis = redis_prop_redis_pool(name)

  # Redis: GET
  define_method(name) do
    instance_variable_get("@#{name}") || begin
      value = redis.with do |conn|
        conn.hget(object_key, name)
      end || send("#{name}_default_value")
      instance_variable_set("@#{name}", value.to_i)
    end
  end

  define_method("#{name}_default_value") do
    0
  end

  # Redis: INCR
  define_method("incr_#{name}") do |by = 1|
    value = redis.with do |conn|
      conn.hincrby(object_key, name, by)
    end
    instance_variable_set("@#{name}", value.to_i)
  end

  # Redis: DECR
  define_method("decr_#{name}") do |by = 1|
    value = redis.with do |conn|
      conn.hincrby(object_key, name, -by)
    end
    instance_variable_set("@#{name}", value.to_i)
  end

  # Redis: SET
  define_method("reset_#{name}") do
    value = instance_eval(&blk)

    redis.with do |conn|
      conn.hset(object_key, name, value)
    end
    instance_variable_set("@#{name}", value)
  end

  # Redis: DEL
  define_method("remove_#{name}") do
    redis.with do |conn|
      conn.hdel(object_key, name)
    end
    remove_instance_variable("@#{name}") if instance_variable_defined?("@#{name}")
  end
end