NWRUG - Celluloid

Celluloid talk for NWRUG

Transcript

2. @adamholt
3. @EngineYard
4. What is Celluloid?!
5. @bascule
6. “Celluloid is a concurrent object oriented programming framework for Ruby which lets you build multithreaded programs out of concurrent objects just as easily as you build sequential programs out of regular objects”
9. http://www.youtube.com/watch?v=xrIjfIjssLE
10. Powers Sidekiq
11. Actors!
12. class Sheen include Celluloid def initialize(name) @name = name end def set_status(status) @status = status end def report "#{@name} is #{@status}" end end >> charlie = Sheen.new "Charlie Sheen" => #<Celluloid::Actor(Sheen:0x00000100a312d0) @name="Charlie Sheen"> >> charlie.set_status "winning!" => "winning!" >> charlie.report => "Charlie Sheen is winning!" >> charlie.set_status! "asynchronously winning!" => nil >> charlie.report => "Charlie Sheen is asynchronously winning!" Actors
13. >> james = JamesDean.new => #<Celluloid::Actor(JamesDean:0x80c27ce0)> >> Celluloid::Actor[:james] = james => #<Celluloid::Actor(JamesDean:0x80c27ce0)> >> Celluloid::Actor[:james] => #<Celluloid::Actor(JamesDean:0x80c27ce0)> Actor Registry class MyActor include Celluloid def initialize(name) @name = name @other_actor = Actor[:other_actor] end end
14. Futures!
15. >> future = charlie.future :report => #<Celluloid::Future:0x000001009759b8> >> future.value => "Charlie Sheen is winning!" Futures >> future = Celluloid::Future.new { 2 + 2 } => #<Celluloid::Future:0x000001008425f0> >> future.value => 4
16. Linking!
17. Linking class JamesDean include Celluloid class CarInMyLaneError < StandardError; end def drive_little_bastard raise CarInMyLaneError, "that guy's gotta stop. he'll see us" end end >> james = JamesDean.new => #<Celluloid::Actor(JamesDean:0x1068)> >> james.drive_little_bastard! => nil >> james => #<Celluloid::Actor(JamesDean:0x1068) dead>
18. Linking class ElizabethTaylor include Celluloid trap_exit :actor_died def actor_died(actor, reason) p "Oh no! #{actor.inspect} has died because of a #{reason.class}" end end >> james = JamesDean.new => #<Celluloid::Actor(JamesDean:0x11b8)> >> elizabeth = ElizabethTaylor.new => #<Celluloid::Actor(ElizabethTaylor:0x11f0)> >> elizabeth.link james => #<Celluloid::Actor(JamesDean:0x11b8)> >> james.drive_little_bastard! => nil "Oh no! #<Celluloid::Actor(JamesDean:0x11b8) dead> has died because of a JamesDean::CarInMyLaneError"
19. Linking class PorscheSpider include Celluloid class CarInMyLaneError < StandardError; end def drive_on_route_466 raise CarInMyLaneError, "head on collision :(" end end class JamesDean include Celluloid def initialize @little_bastard = PorscheSpider.new_link end def drive_little_bastard @little_bastard.drive_on_route_466 end end
20. Linking >> james = JamesDean.new => #<Celluloid::Actor(JamesDean:0x1108) @little_bastard=#<Celluloid::Actor(PorscheSpider:0x10ec)>> >> elizabeth = ElizabethTaylor.new => #<Celluloid::Actor(ElizabethTaylor:0x1144)> >> elizabeth.link james => #<Celluloid::Actor(JamesDean:0x1108) @little_bastard=#<Celluloid::Actor(PorscheSpider:0x10ec)>> >> james.drive_little_bastard! => nil "Oh no! #<Celluloid::Actor(JamesDean:0x1108) dead> has died because of a PorscheSpider::CarInMyLaneError"
21. Supervisors!
22. Supervisors >> supervisor = Sheen.supervise "Charlie Sheen" => #<Celluloid::Supervisor(Sheen) "Charlie Sheen"> >> charlie = supervisor.actor => #<Celluloid::Actor(Sheen:0x00000100a312d0)> >> Sheen.supervise_as :charlie, "Charlie Sheen" => #<Celluloid::Supervisor(Sheen) "Charlie Sheen"> >> charlie = Celluloid::Actor[:charlie] => #<Celluloid::Actor(Sheen:0x00000100a312d0)> class MyGroup < Celluloid::SupervisionGroup supervise MyActor, :as => :my_actor supervise AnotherActor, :as => :another_actor, :args => [{:start_working_right_now => true}] end MyGroup.run # or MyGroup.run!
23. Other Features!
24. Other Features pool = MyWorker.pool pool = MyWorker.pool(size: 9000, args: [:foo, :bar, :baz]) Pools class TimerExample include Celluloid attr_reader :fired, :timer def initialize @fired = false @timer = after(3) { puts "Timer fired!"; @fired = true } end end Timers And More...
25. Evented sockets for Celluloid Actors
26. Distributed Celluloid Actors using 0MQ
27. Celluloid::IO based web server
28. https://github.com/omgitsads/Scamp/tree/2.0-celluloid