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Instrumenters are stored in a thread local.

Methods
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Attributes

[R] id

Class Public methods

new(notifier)

Source: show | on GitHub 

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 11
def initialize(notifier)
  @id       = unique_id
  @notifier = notifier
end

Instance Public methods

finish(name, payload)

Send a finish notification with name and payload.

Source: show | on GitHub 

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 44
def finish(name, payload)
  @notifier.finish name, @id, payload
end

finish_with_state(listeners_state, name, payload)

Source: show | on GitHub 

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 48
def finish_with_state(listeners_state, name, payload)
  @notifier.finish name, @id, payload, listeners_state
end

instrument(name, payload = {})

Given a block, instrument it by measuring the time taken to execute and publish it. Without a block, simply send a message via the notifier. Notice that events get sent even if an error occurs in the passed-in block.

Source: show | on GitHub 

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 20
def instrument(name, payload = {})
  # some of the listeners might have state
  listeners_state = start name, payload
  begin
    yield payload if block_given?
  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)

Send a start notification with name and payload.

Source: show | on GitHub 

# File activesupport/lib/active_support/notifications/instrumenter.rb, line 39
def start(name, payload)
  @notifier.start name, @id, payload
end