Code sample for using Ruby modules as plugins

Modules as Plugins

#!/usr/bin/env ruby -wKU

class Item
  attr_accessor :title
  
  def initialize(title)
    @title = title
  end
end

module PluginA
  def title()
    @title = @title + ' Handled by A'
    super
  end
end

module PluginB
  def title()
    @title = @title + ' Handled by B'
    super
  end
end

module Stream 
  extend self
    
  def load_plugins(items, plugins)
    items.each do |i|  
      plugins.each do |p|
        i.extend(const_get(p))
      end
    end
  end
  
end

plugins = ['PluginA', 'PluginB']
items = [Item.new('First Item '), Item.new('Second Item')]

ready_items = Stream.load_plugins(items, plugins)

ready_items.each do |item|
  puts item.title
end