module OpenTelemetry::Instrumentation::ActiveSupport

Contains the OpenTelemetry instrumentation for the ActiveSupport gem

rubocop:disable Style/Documentation

Constants

VERSION

Public Class Methods

subscribe( tracer, pattern, notification_payload_transform = nil, disallowed_notification_payload_keys = [] ) click to toggle source

A very hacky way to make sure that OpenTelemetry::Instrumentation::ActiveSupport::SpanSubscriber gets invoked first

# File lib/opentelemetry/instrumentation/active_support/span_subscriber.rb, line 18
def self.subscribe( # rubocop:disable Metrics/AbcSize
  tracer,
  pattern,
  notification_payload_transform = nil,
  disallowed_notification_payload_keys = []
)
  subscriber = OpenTelemetry::Instrumentation::ActiveSupport::SpanSubscriber.new(
    name: pattern,
    tracer: tracer,
    notification_payload_transform: notification_payload_transform,
    disallowed_notification_payload_keys: disallowed_notification_payload_keys
  )

  subscriber_object = ::ActiveSupport::Notifications.subscribe(pattern, subscriber)
  ::ActiveSupport::Notifications.notifier.synchronize do
    if ::Rails::VERSION::MAJOR >= 6
      s = ::ActiveSupport::Notifications.notifier.instance_variable_get(:@string_subscribers)[pattern].pop
      ::ActiveSupport::Notifications.notifier.instance_variable_get(:@string_subscribers)[pattern].unshift(s)
    else
      s = ::ActiveSupport::Notifications.notifier.instance_variable_get(:@subscribers).pop
      ::ActiveSupport::Notifications.notifier.instance_variable_get(:@subscribers).unshift(s)
    end
  end
  subscriber_object
end