This document discusses Rails and FreeWheel's use of Rails for their monetization platform. Some key points: - FreeWheel uses Rails for their MRM/RPM user interface and has upgraded their Rails version over time from 1.2 to 3.1. - They take a quick development approach using Rails conventions but also optimize for performance. - Their architecture includes Rails modules, widgets built with jQuery, and a Unicorn HTTP server for handling requests.

1. Rails B2B
@freewheel.tv @freewheel.tv
2012.04
© FreeWheel 2011

2. ! FreeWheel
!
! Rails FreeWheel
! Rails
!

3. FreeWheel !

4. What does FreeWheel do?
•
•
• 30%
•
• comScore

6. What is MRM/RPM?
• Monetization Rights Management®
•
• Revenue & Payments Management®
•
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8. !

9. FreeWheel MRM
Ad#Tag#/#Request Ad#Manager Video#Metadata
MRM
Ad#Server Ad#Server
Ad#Server Ad#Server
DB:#OLTP/OLAP UI/API:#Adver-sing/Inventory
Log#Files
ETL#Repor-ng
Inventory#Forecast
9

10. Technology Stacks
Integration Flash&(AS2/AS3)& iPhone/iPad&(ObjAC)& HTML5&/&JavaScript&
Android&(Java)& Silverlight&(C#)&
Service Quality
BUSINESS&INTELLIGENCE& MRM/RPM:&UI/API # Cucumber
& (RoR,#jQuery,#Java) Analy-cs##
Ad&Server&
ETL&ReporQng& (MicroStrategy)
(C++) Selenium
Forecast&
(Map#Reduce#like,#C++,#Python)
Log&Replay
#
Management&&&Monitor&Portal& BVI/BII/Data&
Search##
(Python,#jQuery,#SQLite) Manager
(Lucene#/#Solr)
(Ruby,#etc.) REGRESSION &
MRM/RPM&UI &
VI&
Message#Queue(ZMQ) Cache#/#Fast#Storage#(Memcached/ #
Ad&Server &
LevelDB/MongoDB) OLAP#(Infobright)
ETL&ReporQng
Forecast&
Task#Scheduler#(crontab,#etc) OLTP#(MySQL) Rules&Engine &
Infrastructure
SYSTEM& STORAGE& NETWORKING&
Mostly#Linux#(RHEL#5) SAN#+#NAS LB#/#Akamai
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11. Open Source Building Blocks
11

12. •
•
• Uptime: 99.99%
•
•
•
•
•
• Insight
•
• +
•
•
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13. • Since 2010
•
• S.W.A.T team
• Top Guns/Code Monkeys
• !
• DevOps:
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14. UI
• RPM+MRM UI
•
• Ruby on Rails + Sinatra
• JS/CSS
•
•
•
•
•
• …
•
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15. Rails FreeWheel !

16. Rails
! 2007 7 Rails 1.2.3
! MRM UI
Rails

17. !
17

18. Quick-and-Dirty
! Business Driven
!
! B2B
! Release
! 5~6 Release
! Point Release Bugfix
! “ ”
! Rails
! Best Practice

19. Rails “ ”
! Rails !
! !
! “ ” workaround
! Fat Model
! !
! !
! Validations Callbacks !
! View
! Partial
! RHTML/HAML/ERB JavaScript

20. UI !
20

21. Rails

22. ! Rails1.2 (March, 2007) => Rails3.0 (April, 2011)
! Bundle Scopes I18N Rack-based Middleware…
! MRM RPM !
! Rails3.1 Asset Pipeline
! JavaScript
! jQuery 1.2 => jQuery 1.4.4
! jQuery-UI Widgets

23. Rails3.0
! 3 Release 12
! LoC in Branch
# Commits LoC LoC(Exclude Vendor)
344 +69322, -62147 +41559, 43750
! LoC in Trunk
# Commits LoC
592 +13137, -11324

24. ! SSO API …
! Module Mini Rails
! Application Module Bundled APP
Module Module Module
Resources Resources Resources
C Biz Logic C Biz Logic C Biz Logic
A A A
O O O
N View/Helper P
N View/Helper P
N View/Helper P
I I I
F Controller F Controller F Controller
Model Model Model
SSO User Permission System API (Search, i18n, …) Tasks
Shared Model Controller/Dispatcher View/Helper BizLogic
Shared 3rd Plugins Components Shared Resources

25. !
mount Module
!
Gem Module !
Asset Pipeline Modul
e !
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26. Business Model
! Let Model be DAO
! ActiveRecord Model Business Logic
! Active Record Callbacks Validations
Rails MVC with Business Model
AcQon&View Widgets&
AcQon&Controller
Business&Model& Business&Scenario&
AcQveRecord AcQveRecord

27. — Model !
Validation
!
1.
Validation
2.
validation if/else
!
3.
Model
LoC>2k)!
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28. — Business Model !
Business Model
Validation
1.
“ ”
2.
Business Model
3. Business
Model
Business Model
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29. Widgets
! MVC
! jQuery jQuery UI
! JSON + Restful
!
!
! Grid, Tab, Calendar, Layout, Accordion, Wizard, Dropdown…
!
!
!
!

30. Widgets !
Widgets
AdProduct ContentTargeting Schedule
Budget GeoTargeting ... ...
Components
AdvancedS
Base Grid Toolbar Form
earch
Lang jQuery I18n FW Core
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31. Widget - !
31

32. Widget— !
FormWidget
Field
!
32

33. Widget— !
!
Widget
33

34. Widgets !
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35. Unicorn +
! Lighttpd + FastCGI
! Unicorn
– An HTTP server with 2k+ lines of pure ruby code
– Better memory control by shared memory, forking
– Copy-on-write with REE 1.8.7
– (Twitter, Github…)

37. ! DCI Data, context and interaction !
!
! !
! !
! CSS !
! FreeWheel UI !
! !
! !
Multitenant Architecture Easy Customization Better Access