ActiveSupport::Notifications

Lightining Talk apresentada no Hackin Evening da Plataformatec

Transcript

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3. # Subscribe... ActiveSupport::Notifications.subscribe 'xml.processed' do |*args| # ... end
4. # Publish! ActiveSupport::Notifications.instrument 'xml.processed', :xml => 'WTF_BBQ_10.xml'
5. ActiveSupport::Notifications.subscribe 'xml.processed' do |*args| event = ActiveSupport::Notifications::Event.new(*args) event.name # 'xml.processed' event.payload[:xml] # 'WTF_BBQ_10.xml' event.duration # 10 miliseconds event.time # Time event.end # Time event.payload[:exception] # ["RuntimeError", ":poop:"] end
6. ActiveSupport::Notifications.subscribe %r[xml] do |*args| event = ActiveSupport::Notifications::Event.new(*args) event.name # 'xml.processed' / 'xml.not_found' event.payload[:xml] # 'WTF_BBQ_10.xml' event.duration # 10 miliseconds event.time # Time event.end # Time event.payload[:exception] # ["RuntimeError", ":poop:"] end
7. Q%(!+* ,#+$ ( b,&!+ class TimedSubscriber def call(name, started, finished, id, payload) # Instrumented block finished end end ActiveSupport::Notifications.subscribe %r[xml], TimedSubscriber.new
8. Ev$)"$- class EventedSubscriber def start(name, id, payload) # Instrumented block started end def finish(name, id, payload) # Instrumented block finished end end ActiveSupport::Notifications.subscribe %r[xml], EventedSubscriber.new A!"#v$S%pp&r" 4
9. class OrderXmlParser extend Forwardable def_delegator ActiveSupport::Notifications, :instrument def process(doc) instrument 'xml.processed', :xml => doc do |payload| # Actual work. # payload[:xml] => doc end end end <3 F&rw(r-(b,$ <3
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12. ActiveSupport::Notifications.subscribe 'xml.processed' do |*args| event = ActiveSupport::Notifications::Event.new(*args) Rails.logger.info "processed #{event.payload[:xml]}" end ActiveSupport::Notifications.subscribe 'xml.not_found' do |*args| event = ActiveSupport::Notifications::Event.new(*args) Rails.logger.info ":bomb: #{event.payload[:xml]} not found" end
13. require 'active_support/log_subscriber' class ProcessingLogger < ActiveSupport::LogSubscriber # xml.processed def processed(event) info "processed #{event.payload[:xml]}" end # xml.not_found def not_found(event) debug ":bomb: #{event.payload[:xml]} not found" end end ProcessingLogger.attach_to :xml
14. r&#-r(.$/,&.r(.$ method=GET path=/jobs/833552.json format=json controller=jobs action=show status=200 duration=58.33 view=40.43 db=15.26
15. class ProcessingLogStore def call(*args) event = ActiveSupport::Notifications::Event.new(*args) Redis.current.rpush(event.name, event.to_json) end end ActiveSupport::Notifications.subscribe %r[xml], ProcessingLogStore
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17. • NewRelic • StatsD • Librato • KISS metrics
18. • Workers (Resque, Sidekiq, etc) • uso de APIs (Faraday) • Rake tasks • E toda a stack da sua aplicação :)
19. • https://speakerdeck.com/nextmat/digging-deep-with- activesupportnotifications • http://api.rubyonrails.org/classes/ActiveSupport/ Notifications.html • http://railscasts.com/episodes/249-notifications-in-rails-3 • http://blog.librato.com/2012/05/digging-deep-with- activesupportnotifica.html R$f$rê)!#(*
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