Class: ActiveSupport::Notifications::Service

Inherits:
Object
  • Object
show all
Defined in:
lib/active_support/notifications.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(notifier) ⇒ Service

Returns a new instance of Service.



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# File 'lib/active_support/notifications.rb', line 115

def initialize(notifier)
  @notifier = notifier
  @instrumenter = Instrumenter.new(notifier)
  @instrumenters = Hash.new { |h,k| h[k] = notifier.listening?(k) }
end

Instance Attribute Details

#instrumenter ⇒ Object (readonly)

Returns the value of attribute instrumenter.



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# File 'lib/active_support/notifications.rb', line 113

def instrumenter
  @instrumenter
end

#notifier ⇒ Object (readonly)

Returns the value of attribute notifier.



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# File 'lib/active_support/notifications.rb', line 113

def notifier
  @notifier
end

Instance Method Details

#instrument(name, payload = {}) ⇒ Object 



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# File 'lib/active_support/notifications.rb', line 125

def instrument(name, payload = {})
  if @instrumenters[name]
   @instrumenter.instrument(name, payload) { yield payload if block_given? }
  else
    yield payload if block_given?
  end
end

#publish(name, *args) ⇒ Object 



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# File 'lib/active_support/notifications.rb', line 121

def publish(name, *args)
  @notifier.publish(name, *args)
end

#subscribe(*args, &block) ⇒ Object 



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# File 'lib/active_support/notifications.rb', line 133

def subscribe(*args, &block)
  @notifier.subscribe(*args, &block).tap do
    @instrumenters.clear
  end
end

#subscribed(callback, *args) ⇒ Object 



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# File 'lib/active_support/notifications.rb', line 139

def subscribed(callback, *args)
  subscriber = subscribe(*args, &callback)
  yield
ensure
  unsubscribe(subscriber)
end

#unsubscribe(args) ⇒ Object 



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# File 'lib/active_support/notifications.rb', line 146

def unsubscribe(args)
  @notifier.unsubscribe(args)
  @instrumenters.clear
end