= Quebert

async_observer is great, but is dated and doesn't really support running jobs outside of the async_send idiom. Quebert is an attempt to mix how jobs are run in other popular worker queue frameworks, like resque and dj, with async_observer so that you can have it both ways.

A worker queue framework designed around Beanstalk. Features include:

= Features

* [x] Multiple back-ends (InProcess, Sync, and Beanstalk)
* [x] Rails/ActiveRecord integration similar to async_observer
* [ ] Pluggable exception handling (for Hoptoad integration)
* [ ] Reliable daemonization with pidfile support

[x] = Completed, [ ] = Not Started

= How to use

There are two ways to enqueue jobs with Quebert: through the Job itself, provided you set a default back-end for the job, or put it on the backend.

== Jobs

Quebert includes a Job class so you can implement how you want certain types of Jobs performed.
    
    Quebert.backend = Quebert::Backend::InProcess.new
    
    class WackyMathWizard < Quebert::Job
      def perform(*nums)
        nums.inject(0){|sum, n| sum = sum + n}
      end
    end

You can either drop a job in a queue:

    Quebert.backend.put WackyMathWizard, 1, 2, 3

Or drop it in right from the job:

    WackyMathWizard.enqueue 4, 5, 6

Then perform the jobs!

    Quebert.backend.reserve.perform # => 6
    Quebert.backend.reserve.perform # => 15

== Async Sender

Take any ol' class and include the Quebert::AsyncSender.

    Quebert.backend = Quebert::Backend::InProcess.new

    class Greeter
      include Quebert::AsyncSender
      
      def initialize(name)
        @name = name
      end
      
      def sleep_and_greet(time_of_day)
        sleep 10000 # Sleeping, get it?
        "Oh! Hi #{name}! Good #{time_of_day}."
      end
      
      def self.budweiser_greeting(name)
        "waaazup #{name}!"
      end
    end
    
    walmart_greeter = Greeter.new("Brad")

Remember the send method in ruby?

    walmart_greeter.send(:sleep_and_greet, "morning")
    # ... time passes, you wait as greeter snores obnoxiously ...
    # => "Oh! Hi Brad! Good morning."

What if the method takes a long time to run and you want to queue it? async_send it!

    walmart_greeter.async_send(:sleep_and_greet, "morning")
    # ... do some shopping and come back later when the dude wakes up
    
Quebert figures out how to *serialize the class, throw it on a worker queue, re-instantiate it on the other side, and finish up the work.

    Quebert.backend.reserve.perform # => "Oh! Hi Brad! Good morning."
    # ... Sorry dude! I'm shopping already
    
Does it work on Class methods? Yeah, that was easier than making instance methods work:

    Quebert.async_send(:budweiser_greeting, "Corey")
    Quebert.backend.reserve.perform # => "waazup Corey!"

* Only basic data types are included for serialization. Serializers may be customized to include support for different types.

= License 

Copyright (c) 2010 Brad Gessler

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.