1. Real Time Event Dispatcher

• Pushing symfony events

• in real time

• to your clients

2. Imagine Games Remember Google Wave? No? Anyone??? Read/Delete a message, all favicons change Your turn? Instant notification GMail Like tail f /var/log/my.log >some.browsers

3. ITS JUST SOOOO COOL!!! You click somewhere and immediately see a response somewhere else... Real Time Event Dispatcher

4. @KaroDidi 1 wife, 2 kids, 3 monitors 34 years Day-Job: Working on Excel/Access VBA Applications :-/ True heart belongs to Web and PHP since >10 Years Own company/Freelancer www.smartpixelmedia.de Real-Life? Ah, right... Mountainbike Model plane/heli Peter Dietrich Real Time Event Dispatcher Hobbies: www.karopapier.de www.xosofox.de www.managerator.de www.tmeet.de www.timini.de www.beididi.de www.jobeet.de / www.symfony2.de www.d1d.li

5. The Big Bicture Some PHP Some data transport Some JS Real Time Event Dispatcher sfBackend APE

6. Real Time Event Dispatcher lib/model APE Custom Event Handler sfEventHandler Browser Browser Browser Throw Event HTTP Request JSON data Process Event Response on long-polling AJAX request Event bubbling through Browser Tab Browser Tab

7. Real-Time?? Really really?

• Yes, really really! *

• Because it is not Polling! Data is being pushed!

Real Time Event Dispatcher * Conditions apply: Network latency, Server load,

8. Polling?

• Polling is just reverse Spam

Real Time Event Dispatcher Alexis Richardson http://www.rabbitmq.com/resources/RabbitMQ_Oxford_Geek_Night.pdf (Slide 23) http://www.ape-project.org/comics/1/Chapter-I-common-let-s-push.html

9. AJAX Long Polling

• POST /longpoll HTTP/1.1

• .oO(ZZZZZZ) - Wait for data

• Or close, send data, and wait

• again

Real Time Event Dispatcher Server Client 25s 25s POST Data Rx Data

10. Comet Servers

• APE (AJAX Push Engine, V2 coming, OSS)

• node.js

• StreamHub (Community Edition available)

• Meteor (OSS)

• Share your alternatives later?

Real Time Event Dispatcher BTW, your Apache would of course instantly go down...

11. What is APE?

• www.ape-project.org

• C, optimised for long-polling

• Provides Server and Client JS Framework

• Channels to listen on

• Internally calls it pipes public and private (=sent to a channel or send to a user)

Real Time Event Dispatcher http://www.xosofox.de/2010/03/playing-with-my-new-pet-ape/

12. ... Some APE specifics

• Functionality by itself quite bare

• Comes with some modules

• Add Server Side JS

• getPipeByUser?

• You need to define your own user session handling to send to username

Real Time Event Dispatcher http://www.xosofox.de/2010/10/ape-user-handling/

13. Enough! Gimmi code!

• Sf Event Dispatcher

Real Time Event Dispatcher Dennis Benkert @denderello #sfLive2010 http://www.slideshare.net/denderello/symfony-live-2010-using-symfony-events-to-create-clean-class-interfaces

14. ... More code

• Custom Event Handler

Real Time Event Dispatcher Event Payload Channel Define your payload here!

15. ... Even more Code

• Call to inline push on APE

• JSON based

• Need special commands on the server

Real Time Event Dispatcher

16. Even more Code Real Time Event Dispatcher Event Payload Channel

17. Server Side JS

• Example of event dispatching

Real Time Event Dispatcher Event Payload Channel

18. Gimmi JS

• Client Side APE_JSF EventHandler

Real Time Event Dispatcher

19. Gimmi JS

• Do something

• • Change favicon

• • Add/Remove Elements

• • Redraw Canvas

• • Add to Log

Real Time Event Dispatcher

20. Some things to consider

• Auth*ation

• User-Handling, concurrent tabs?

• Refresh < -- > Session resume

• Channels

• Public?

• Page-Design

• • Reloads? => Reconnect => new session

• • Persistent overlay
    with iframe? Real Time Event Dispatcher
  • 21. APE Alternatives?
    • node.js (bare)
    • • socket.io (tries to find best method, websockets, AJAX, Flash, ...)
    • RabbitMQ?
    • • JSONRPC
    • • Better ask @old_sound about that
    • • RabbitMQ and APE could work together
    Real Time Event Dispatcher
  • 22. Psst... Annoying stuff
    • APE
    • • APE Protocol takes some time to grasp
    • • Little/confusing docs
    • • Performance
    • General:
    • • Browser parallel limits
    • • Same origin (APEs workaround is *.domain.com)
    • • Iframe
    • • User/session handling
    Real Time Event Dispatcher
  • 23. Recap
    • Nice interaction between sf backend server, Comet server and Client
    • Interesting, different techniques involved
    • • PHP Backend
    • • JS Server side
    • • JS Client side
    • Just soo cool as soon as it works ;-)
    Real Time Event Dispatcher
  • 24. Further reading
    • Ape-project.org
    • Node.js
    • RabbitMQ
    Real Time Event Dispatcher
  • 25. Theres one more thing
    • Questions?
    • Share your experience
    • If you like it, keep nagging @KaroDidi to release sfRealTimeEventDispatcherPlugin
    Real Time Event Dispatcher ... And please give http://tmeet.de/sflive a try