The document discusses two popular options for asynchronous processing in Ruby: DelayedJob and Resque. It provides details on each option such as DelayedJob being ActiveRecord based while Resque uses Redis. The document also provides usage examples and links to sample applications and plugins for integrating asynchronous processing into mailers.

1. Resque

2. Asynchronous
Processing

3. Two popular options
• DelayedJob
• Resque

4. DelayedJob
• http://github.com/tobi/delayed_job
• ActiveRecord based
• BatchImporter.new(Shop.find(1)).send_later
(:import_massive_csv, massive_csv)

5. Resque
• http://github.com/defunkt/resque
• Redis based
• Battle tested at GitHub

6. Usage
class Converter
@queue = :conversion
def self.perform(id)
...
end
end
Resque.enqueue(Converter, 123)

7. Invoking
QUEUE=:conversion rake environment resque:work

8. Sample App
• http://github.com/joerichsen/resque_demo

9. Misc
• MySQL has gone away - http://axonflux.com/resque-to-the-rescue-but-a-gotcha-dont-forget
• Deployment and Capistrano
• Priorities
• Namespaces

10. Mailers specifically
• http://github.com/zapnap/resque_mailer
• http://github.com/andersondias/
delayed_job_mailer