facebook on rails
DESCRIPTION
Some observations on Facebook development using Ruby on Rails, Heroku, Facebooker, New Relic Presented at Ruby Tuesday, Taipei, 2009.10.20TRANSCRIPT
Facebook on Rails
CardinalBlue
Ruby Tuesday 2009.10.20
Friday, October 23, 2009
300 million Facebook users around the world
40% of all Internet Users in North America
are on Facebook!
Friday, October 23, 2009
Facebook Trends (台灣)
73 天後＊用戶者成長了三倍
＊連續幾個禮拜成長率世界第一
女性使用者稍多
學生與白領階級居
Friday, October 23, 2009
Facebook Apps Boom
Friday, October 23, 2009
Friday, October 23, 2009
Demographic Trends
• More female gamers
• More younger (ages 8-15) gamers
• More older (ages 50+) gamers
Friday, October 23, 2009
FB Games are Social• Trend #1: Virtual Worlds
• e.g., YoVille, PetSociety
• Trend #2: Customization & Personalization
• e.g., Nintendo’s “Mii” avatars, Buddy Poke
• Trend #3: Collections and Wish Lists
• e.g., Mafia Wars
• Trend #4: Interaction and Engagement
• Farm Town, FarmVille, Barn Buddy
• Trend #5: Narrative and Missions
Friday, October 23, 2009
FB Games are Social• Trend #6: Gift Invites
• e.g., Lil Green Patch, Give a Heart
• Trend #7: Donations as Revenue
• e.g., SpareChange, PayPal
• Trend #8: Virtual Goods
• e.g., Mafia Wars, PetSociety
• Trend #9: Recruiting Users
• e.g., FarmVille, Restaurant City, Tycoons
• Trend #10: Capitalizing on Player Resources
• e.g., All that Glitters, Photo-of-the-Day
Friday, October 23, 2009
FBML Application Architecture
Friday, October 23, 2009
Facebook apps on Rails
• Rails 2.3.3
• Facebook API via Facebooker
• Hosted on Heroku
• Monitor via NewRelic
Friday, October 23, 2009
User model
Facebook UIDs are 64-bit, so need bigint for User#id
create_table :users, :id => false do |t|t.column :id, "bigint PRIMARY KEY", :null => false...t.timestamps
end
Associations can be done based on user_id
create_table :balloonst.column :user_id, :bigint...t.timestamps
end
Friday, October 23, 2009
Facebooker
• Wrapper for Facebook API
• Facebooker::User to query user data
• Facebooker::Publisher for feeds/notifications
Friday, October 23, 2009
Facebooker
• Wrapper for Facebook API
• Facebooker::User to query user data
• Facebooker::Publisher for feeds/notifications
Friday, October 23, 2009
Preload FQL• Facebooker::User to query user data
• Since query can take 500ms or more, use Preload FQL to pre-query the data
preload_fql = Hash.newpreload_fql[:preload_user_data] = { :pattern => ".*", :query => "SELECT name,birthday_date FROM user WHERE uid={*user*};"}
Facebooker::Admin.new(Facebooker::Session.create).set_app_properties({:preload_fql => preload_fql.to_json})
• Obtain the preloaded data on every page: params[:fb_sig_user_data]
Friday, October 23, 2009
Open Stream API
• Facebooker::Publisher for feeds/notifications
• Facebook has deprecated template bundles
• Instead use the Open Stream API:<script>var attachment = {'media':[{'type':'image', 'src':'http://cardinalblue.com/images/cblue_logo_white100.png', 'href':'http://cardinalblue.com'}]};Facebook.streamPublish('Hello Cardinal Blue', attachment);</script>
Friday, October 23, 2009
Functional tests with facebook_get
test "requires-login page, logged in" do facebook_get :install assert_response :success assert_nil facebook_redirect_url end
test "requires-login page, not logged in" do # access a page that requires login facebook_get :install, :fb_sig_user => nil assert_response :success assert_not_nil facebook_redirect_url assert facebook_redirect_url.match("http://www.facebook.com/install.php")end
Friday, October 23, 2009
Heroku
Friday, October 23, 2009
Scaled to over 10000 requests per minute
Friday, October 23, 2009
Heroku features• Uses nginx, thin, postgres, Amazon EC2
• Easy Deployment: git push heroku master
• Flexible Scaling: heroku dynos +1
• Free Memcache: Rails.cache
• Delayed Job: facebook_session.send_notification(...) facebook_session.send_later(:send_notification,...)
• New Relic
Friday, October 23, 2009
New Relic
Facebooker
Friday, October 23, 2009
Can set up custom tracers:
Facebook/query Facebook/notify Facebook/feed
class NewrelicTracer def self.query yield end class << self add_method_tracer :query, 'Custom/Facebook/query' endend
NewrelicTracer.query do location = facebook_session.user.current_locationend
Friday, October 23, 2009
Observations
• Facebook is growing
• Facebook games are social
• Rails + Facebooker = Facebook app
• Heroku is fun (and scalable)
Friday, October 23, 2009
Thank you. 謝謝觀賞
http://cardinalblue.com/about
Friday, October 23, 2009