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rails / 4.1 / activesupport / notifications / instrumenter.html

class ActiveSupport::Notifications::Instrumenter

Parent:
Object

Instrumenters are stored in a thread local.

Attributes

id[R]

Public Class Methods

new(notifier) Show source 
# File activesupport/lib/active_support/notifications/instrumenter.rb, line 9
def initialize(notifier)
  @id       = unique_id
  @notifier = notifier
end

Public Instance Methods

finish(name, payload) Show source

Send a finish notification with name and payload.

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 35
def finish(name, payload)
  @notifier.finish name, @id, payload
end
instrument(name, payload={}) { |payload| ... } Show source

Instrument the given block by measuring the time taken to execute it and publish it. Notice that events get sent even if an error occurs in the passed-in block.

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 17
def instrument(name, payload={})
  start name, payload
  begin
    yield payload
  rescue Exception => e
    payload[:exception] = [e.class.name, e.message]
    raise e
  ensure
    finish name, payload
  end
end
start(name, payload) Show source

Send a start notification with name and payload.

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 30
def start(name, payload)
  @notifier.start name, @id, payload
end

© 2004–2016 David Heinemeier Hansson
Licensed under the MIT License.