Resque is a Redis-backed Ruby library for creating background jobs. It allows Ruby objects to be enqueued in Redis and processed asynchronously in the background by workers. Workers pull jobs from the Redis queue and process them. This keeps background jobs from blocking the web process. Resque uses Redis for reliable queuing and storage of job queues rather than a database. It is simple to use and integrates with Ruby on Rails and other frameworks.

1. Introduction to
Resque
Nov. 20, 2009 (Fri.)
Feedforce, Inc.
suzuki@feedforce.jp

2. Resque
GitHub
Ruby
Ruby
JobObj.perform(*args)
Redis
git://github.com/defunkt/resque.git
WEB

3. Redis
Key-Value Store
http://code.google.com/p/redis/
ANSI C
POSIX
String, List, Set

4. Redis
$telnet localhost 6379
SET keyname 3
bar
+OK
GET keyname
$3
bar

5. Redis
http://w.koshigoe.jp/study/

6. GitHub
(run/fin)
fat, old, too long
push/pop

7. O(1) push/pop
Ruby

8. Resque + Redis
A. Resis
Redis

9. Resque
WEB
fork
Hoptoad
Redis

10. DEMO
$ sudo gem install redis redis-namespace yajl-ruby
--source=http://gemcutter.org
$ sudo gem install sinatra
$ git clone git://github.com/defunkt/resque.git
$ cd resque/examples/demo
$ rackup config.ru
$ open http://localhost:9292/

11. DEMO
$ VERBOSE=true QUEUE=default rake resque:work

12. DEMO
$ VVERBOSE=true QUEUE=default rake resque:work

13. DEMO
$ open http://localhost:9292/resque/

14. class Archive
@queue = :file_serve
def self.perform(repo_id, branch = 'master')
repo = Repository.find(repo_id)
repo.create_archive(branch)
end
end

15. class Repository
def async_create_archive(branch)
Resque.enqueue(Archive, self.id, branch)
end
end

16. klass, args = Resque.reserve(:file_serve)
klass.perform(*args) if klass.respond_to? :perform

17. $ cd app_root
$ QUEUE=file_serve rake resque:work

18. JSON
{
'class': 'Archive',
'args': [ 44, 'masterbrew' ]
}

19. Resque::Failure
Redis
Resque Hoptoad
http://www.hoptoadapp.com/pages/home

20. Resque vs DelayedJob

21. Resque
Ruby
Redis
RAM

22. DelayedJob
Redis

23. GitHub ( )
Ruby ( )
Redis ( )
→ http://w.koshigoe.jp/study/
Resque
Redis