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class ActiveSupport::Notifications::Instrumenter

Parent:: Object

Instrumenters are stored in a thread local.

Attributes

id[R]

Public Class Methods

# 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 37
def finish(name, payload)
  @notifier.finish name, @id, payload
end

finish_with_state(listeners_state, name, payload) Show source

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 41
def finish_with_state(listeners_state, name, payload)
  @notifier.finish name, @id, payload, listeners_state
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 = {})
  # some of the listeners might have state
  listeners_state = start name, payload
  begin
    yield payload
  rescue Exception => e
    payload[:exception] = [e.class.name, e.message]
    payload[:exception_object] = e
    raise e
  ensure
    finish_with_state listeners_state, 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 32
def start(name, payload)
  @notifier.start name, @id, payload
end