module Datadog::Contrib::ActionPack::ActionController::Instrumentation
Instrumentation
for ActionController
components
Public Instance Methods
exception_controller?(payload)
click to toggle source
# File lib/ddtrace/contrib/action_pack/action_controller/instrumentation.rb, line 77 def exception_controller?(payload) exception_controller_class = Datadog.configuration[:action_pack][:exception_controller] controller = payload.fetch(:controller) headers = payload.fetch(:headers) # If no exception controller class has been set, # guess whether this is an exception controller from the headers. if exception_controller_class.nil? !headers[:request_exception].nil? # If an exception controller class has been specified, # check if the controller is a kind of the exception controller class. elsif exception_controller_class.is_a?(Class) || exception_controller_class.is_a?(Module) controller <= exception_controller_class # Otherwise if the exception controller class is some other value (like false) # assume that this controller doesn't handle exceptions. else false end end
finish_processing(payload)
click to toggle source
# File lib/ddtrace/contrib/action_pack/action_controller/instrumentation.rb, line 30 def finish_processing(payload) # retrieve the tracing context and the latest active span tracing_context = payload.fetch(:tracing_context) env = payload.fetch(:env) span = tracing_context[:dd_request_span] return unless span && !span.finished? begin # Set the resource name, if it's still the default name if span.resource == span.name span.resource = "#{payload.fetch(:controller)}##{payload.fetch(:action)}" end # Set the resource name of the Rack request span unless this is an exception controller. unless exception_controller?(payload) rack_request_span = env[Datadog::Contrib::Rack::TraceMiddleware::RACK_REQUEST_SPAN] rack_request_span.resource = span.resource if rack_request_span end # Set analytics sample rate Utils.set_analytics_sample_rate(span) # Measure service stats Contrib::Analytics.set_measured(span) # Associate with runtime metrics Datadog.runtime_metrics.associate_with_span(span) span.set_tag(Ext::TAG_ROUTE_ACTION, payload.fetch(:action)) span.set_tag(Ext::TAG_ROUTE_CONTROLLER, payload.fetch(:controller)) exception = payload[:exception_object] if exception.nil? # [christian] in some cases :status is not defined, # rather than firing an error, simply acknowledge we don't know it. status = payload.fetch(:status, '?').to_s span.status = 1 if status.starts_with?('5') elsif Utils.exception_is_error?(exception) span.set_error(exception) end ensure span.finish end rescue StandardError => e Datadog.logger.error(e.message) end
start_processing(payload)
click to toggle source
# File lib/ddtrace/contrib/action_pack/action_controller/instrumentation.rb, line 16 def start_processing(payload) # trace the execution tracer = Datadog.configuration[:action_pack][:tracer] service = Datadog.configuration[:action_pack][:controller_service] type = Datadog::Ext::HTTP::TYPE_INBOUND span = tracer.trace(Ext::SPAN_ACTION_CONTROLLER, service: service, span_type: type) # attach the current span to the tracing context tracing_context = payload.fetch(:tracing_context) tracing_context[:dd_request_span] = span rescue StandardError => e Datadog.logger.error(e.message) end