Module | ActiveSupport::Notifications |
In: |
lib/active_support/notifications/instrumenter.rb
lib/active_support/notifications/fanout.rb lib/active_support/notifications.rb |
Notifications provides an instrumentation API for Ruby. To instrument an action in Ruby you just need to do:
ActiveSupport::Notifications.instrument(:render, :extra => :information) do render :text => "Foo" end
You can consume those events and the information they provide by registering a log subscriber. For instance, let‘s store all instrumented events in an array:
@events = [] ActiveSupport::Notifications.subscribe do |*args| @events << ActiveSupport::Notifications::Event.new(*args) end ActiveSupport::Notifications.instrument(:render, :extra => :information) do render :text => "Foo" end event = @events.first event.name # => :render event.duration # => 10 (in milliseconds) event.payload # => { :extra => :information }
When subscribing to Notifications, you can pass a pattern, to only consume events that match the pattern:
ActiveSupport::Notifications.subscribe(/render/) do |event| @render_events << event end
Notifications ships with a queue implementation that consumes and publish events to log subscribers in a thread. You can use any queue implementation you want.
notifier | [W] |