Class: OpenTelemetry::Instrumentation::Excon::Middlewares::Stable::TracerMiddleware

Inherits:
Excon::Middleware::Base
  • Object
show all
Defined in:
lib/opentelemetry/instrumentation/excon/middlewares/stable/tracer_middleware.rb

Overview

Excon middleware for instrumentation

Constant Summary collapse

HTTP_STATUS_SUCCESS_RANGE =

Constant for the HTTP status range

(100..399)

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.around_default_stack ⇒ Object

Returns a copy of the default stack with the trace middleware injected



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# File 'lib/opentelemetry/instrumentation/excon/middlewares/stable/tracer_middleware.rb', line 55

def self.around_default_stack
  ::Excon.defaults[:middlewares].dup.tap do |default_stack|
    # If the default stack contains a version of the trace middleware already...
    existing_trace_middleware = default_stack.find { |m| m <= TracerMiddleware }
    default_stack.delete(existing_trace_middleware) if existing_trace_middleware
    # Inject after the ResponseParser middleware
    response_middleware_index = default_stack.index(::Excon::Middleware::ResponseParser).to_i
    default_stack.insert(response_middleware_index + 1, self)
  end
end

Instance Method Details

#error_call(datum) ⇒ Object 



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# File 'lib/opentelemetry/instrumentation/excon/middlewares/stable/tracer_middleware.rb', line 49

def error_call(datum)
  handle_response(datum)
  @stack.error_call(datum)
end

#request_call(datum) ⇒ Object 



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# File 'lib/opentelemetry/instrumentation/excon/middlewares/stable/tracer_middleware.rb', line 17

def request_call(datum)
  return @stack.request_call(datum) if untraced?(datum)

  span_data = HttpHelper.span_attrs_for(datum[:method])

  attributes = {
    'http.request.method' => span_data.normalized_method,
    'url.scheme' => datum[:scheme],
    'url.path' => datum[:path],
    'url.full' => OpenTelemetry::Common::Utilities.cleanse_url(::Excon::Utils.request_uri(datum)),
    'server.address' => datum[:hostname],
    'server.port' => datum[:port]
  }
  attributes['http.request.method_original'] = span_data.original_method if span_data.original_method
  attributes['url.query'] = datum[:query] if datum[:query]
  peer_service = Excon::Instrumentation.instance.config[:peer_service]
  attributes[OpenTelemetry::SemanticConventions::Trace::PEER_SERVICE] = peer_service if peer_service
  attributes.merge!(OpenTelemetry::Common::HTTP::ClientContext.attributes)
  span = tracer.start_span(span_data.span_name, attributes: attributes, kind: :client)
  ctx = OpenTelemetry::Trace.context_with_span(span)
  datum[:otel_span] = span
  datum[:otel_token] = OpenTelemetry::Context.attach(ctx)
  OpenTelemetry.propagation.inject(datum[:headers])
  @stack.request_call(datum)
end

#response_call(datum) ⇒ Object 



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# File 'lib/opentelemetry/instrumentation/excon/middlewares/stable/tracer_middleware.rb', line 43

def response_call(datum)
  @stack.response_call(datum).tap do |d|
    handle_response(d)
  end
end