npj

# app/controllers/posts_controller.rb
class PostsController < ApplicationController
  
  before_filter :find_post
  
  protected
    
    def find_post
      unless @post = Post.where(:slug => params[:id]).first
        # what do we do here?

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class PostObserver
  def after_save(post)
    Slug[post.slug] = post.id.to_s
    return true
  end
end

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# app/models/user.rb
class User

  class << self
   
    def async_spam_all(email_text)
      Queue::Normal.enqueue(self, :spam_all, email_text)
    end

    def spam_all(email_text)

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# app/models/my_model.rb
class MyModel < ActiveRecord::Base

  def async_background_method(arg1, arg2)
    Queue::Normal.enqueue(self, :background_method, arg1, arg2)
  end
  
  # this happens in the background, 
  def background_method(arg1, arg2)
    # do something that takes a long time...

npj

# app/models/queue/base.rb
class Queue::Base
  
  class << self 
    
    def enqueue(object, method, *args)
      meta = { 'method' => method }
    
      ensure_queueable!(object, method, *args)
    

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def perform(meta = { }, *args)
  if model = meta['class'].constantize.find_by_id(meta['id'])
    model.send(meta['method'], *args)
  end
end

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def enqueue(object, method, *args)
  meta = { 'class' => object.class.name, 'method' => method, 'id' => object.id }
  Resque.enqueue(self, meta, args)
end

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# app/models/queue/base.rb
class Queue::Base
  
  class << self

    def enqueue(object, method, *args)

      meta = { 'method' => method }
    
      if is_model?(object)

npj

Queue::Normal.enqueue(some_object, :some_method, { 'some_arg' => 1, 'some_other_arg' => 2 })

Queue::High.enqueue(some_object, :some_really_imporant_method, { 'some_arg' => 1, 'some_other_arg' => 2 })

Queue::Low.enqueue(some_object, :some_method_that_can_take_its_time, { 'some_arg' => 1, 'some_other_arg' => 2 })

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QUEUE=high,normal,low rake resque:work