Module: Datadog::Tracing::Contrib::HTTP::Instrumentation::InstanceMethods

Includes:
Datadog::Tracing::Contrib::HttpAnnotationHelper
Defined in:
lib/datadog/tracing/contrib/http/instrumentation.rb

Overview

InstanceMethods - implementing instrumentation

Instance Method Summary collapse

Methods included from Datadog::Tracing::Contrib::HttpAnnotationHelper

#service_name

Instance Method Details

#annotate_span_with_request!(span, request, request_options) ⇒ Object 



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# File 'lib/datadog/tracing/contrib/http/instrumentation.rb', line 59

def annotate_span_with_request!(span, request, request_options)
  if request_options[:peer_service]
    span.set_tag(
      Tracing::Metadata::Ext::TAG_PEER_SERVICE,
      request_options[:peer_service]
    )
  end

  span.set_tag(Tracing::Metadata::Ext::TAG_KIND, Tracing::Metadata::Ext::SpanKind::TAG_CLIENT)

  span.set_tag(Tracing::Metadata::Ext::TAG_COMPONENT, Ext::TAG_COMPONENT)
  span.set_tag(Tracing::Metadata::Ext::TAG_OPERATION, Ext::TAG_OPERATION_REQUEST)
  span.set_tag(
    Tracing::Metadata::Ext::HTTP::TAG_URL,
    Contrib::Utils::Quantization::HTTP.url(request.path, {query: {exclude: :all}})
  )
  span.set_tag(Tracing::Metadata::Ext::HTTP::TAG_METHOD, request.method)

  host, port = host_and_port(request)
  span.set_tag(Tracing::Metadata::Ext::NET::TAG_TARGET_HOST, host)
  span.set_tag(Tracing::Metadata::Ext::NET::TAG_TARGET_PORT, port.to_s)

  span.set_tag(Tracing::Metadata::Ext::TAG_PEER_HOSTNAME, host)

  # Set analytics sample rate
  set_analytics_sample_rate(span, request_options)

  span.set_tags(
    Datadog.configuration.tracing.header_tags.request_tags(request)
  )

  Contrib::SpanAttributeSchema.set_peer_service!(span, Ext::PEER_SERVICE_SOURCES)
rescue => e
  Datadog.logger.error("error preparing span from http request: #{e.class}: #{e.message}")
  Datadog::Core::Telemetry::Logger.report(e)
end

#annotate_span_with_response!(span, response, request_options) ⇒ Object 



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# File 'lib/datadog/tracing/contrib/http/instrumentation.rb', line 96

def annotate_span_with_response!(span, response, request_options)
  return unless response&.code

  span.set_tag(Tracing::Metadata::Ext::HTTP::TAG_STATUS_CODE, response.code)

  span.set_error(response) if request_options[:error_status_codes].include? response.code.to_i

  span.set_tags(
    Datadog.configuration.tracing.header_tags.response_tags(response)
  )
rescue => e
  Datadog.logger.error("error preparing span from http response: #{e.class}: #{e.message}")
  Datadog::Core::Telemetry::Logger.report(e)
end

#request(req, body = nil, &block) ⇒ Object

:yield: response



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# File 'lib/datadog/tracing/contrib/http/instrumentation.rb', line 26

def request(req, body = nil, &block)
  host, = host_and_port(req)
  request_options = datadog_configuration(host)
  client_config = Datadog.configuration_for(self)

  return super if Contrib::HTTP.should_skip_tracing?(req)

  Tracing.trace(Ext::SPAN_REQUEST) do |span, trace|
    span.service = service_name(host, request_options, client_config)
    span.set_tag(Tracing::Metadata::Ext::TAG_SVC_SRC, Ext::TAG_COMPONENT)
    span.type = Tracing::Metadata::Ext::HTTP::TYPE_OUTBOUND
    span.resource = req.method

    if Tracing::Distributed::PropagationPolicy.enabled?(
      pin_config: client_config,
      global_config: request_options,
      trace: trace
    )
      Contrib::HTTP.inject(trace, req)
    end

    # Add additional request specific tags to the span.
    annotate_span_with_request!(span, req, request_options)

    response = super(req, body, &block)

    # Add additional response specific tags to the span.
    annotate_span_with_response!(span, response, request_options)

    response
  end
end

#set_analytics_sample_rate(span, request_options) ⇒ Object 



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# File 'lib/datadog/tracing/contrib/http/instrumentation.rb', line 111

def set_analytics_sample_rate(span, request_options)
  return unless analytics_enabled?(request_options)

  Contrib::Analytics.set_sample_rate(span, analytics_sample_rate(request_options))
end