a_parameterized_concern.rb

module ParameterizedConcern
  def extended(mod = nil, &block)
    unless mod
      @extended_block = block
      return
    end

    mod.module_eval(&@extended_block) if @extended_block
  end

  def self.extended(mod)
    class << mod
      def with(options) define_method(:with_options) { options }; dup end
    end
  end
end

b_unlogged_impl.rb

module Query
  class Original
    def initialize(connection, query_string, *args)
      # Implement initialize
    end

    def select
      # Implement select
    end
  end

  module Timeouter
    extend ParameterizedConcern

    def select
      Timeout.timeout(with_options[:duration]) do
        super
      end
    end
  end

  module Memoizer
    extend ParameterizedConcern

    extended do
      @query_memo ||= {}
    end

    def new(connection, query_string, *args)
      @query_memo[[connection, query_string, args]] ||= super
    end
  end
end

c_program.rb

class MyQuery < Query::Original
  include Query::Timeouter.with(:duration => 5)
  extend  Query::Memoizer
end

class NewQuery < Query::Original
  include Query::Timeouter.with(:duration => 10)
end

MyQuery.new("connection", "get me 1").select
MyQuery.new("connection", "get me 1").select
NewQuery.new("connection", "get me 1").select
NewQuery.new("connection", "get me 1").select
MyQuery.new("connection", "get me 1").select
MyQuery.new("connection", "get me 1").select
NewQuery.new("connection", "get me 1").select
NewQuery.new("connection", "get me 1").select

z_logged_impl.rb

module Query
  class Original
    def initialize(connection, query_string, *args)
      puts "Made *new* query with #{connection.inspect}, #{query_string.inspect}, #{args.inspect}"
    end

    def select
      puts "Selecting"
    end
  end

  module Timeouter
    extend ParameterizedConcern

    def select
      puts "Timing out with #{with_options[:duration]}"
      Timeout.timeout(with_options[:duration]) do
        super
      end
    end
  end

  module Memoizer
    extend ParameterizedConcern

    extended do
      @query_memo ||= {}
    end

    def new(connection, query_string, *args)
      if @query_memo.key?([connection, query_string, args])
        puts "Got *memoized* query for #{connection.inspect}, #{query_string.inspect}, #{args.inspect}"
      end

      @query_memo[[connection, query_string, args]] ||= super
    end
  end
end