If someone is interested in a functional pipline example:
module Pipeline def pipline_for(action, *pipes) (@listing ||= {})[action] = pipes define_singleton_method(action) do |*args| run_pipline_for(action, *args) end end def run_pipline_for(action, *args) @listing[action].inject(args) do |result, (item, custom_action)| item.send(custom_action || action, *result) end end end module Formatters class Input class << self def action(*args) puts "Formatters::Input.action" args end def other_action(*args) puts "Formatters::Input.other_action" args end end end class Output class << self def action(*args) puts "Formatters::Output.action" args end end end end class Provider class << self def get_remote_data(*args) puts "Provider.get_remote_data" args end def other_action(*args) puts "Provider.other_action" args end end end class Processor class << self def action(*args) puts "Processor.action" args end def custom_processor(*args) puts "Processor.custom_processor" args end end end class API extend Pipeline pipline_for :action, Formatters::Input, [Provider, :get_remote_data], Processor, Formatters::Output pipline_for :other_action, Formatters::Input, Provider, [Processor, :custom_processor], [Formatters::Output, :action] end puts API.action('Hello World') puts API.other_action('Goodbye World')
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If someone is interested in a functional pipline example: