Class: OpenTelemetry::Instrumentation::Gruf::Interceptors::Server

Inherits:
Gruf::Interceptors::ServerInterceptor
  • Object
show all
Defined in:
lib/opentelemetry/instrumentation/gruf/interceptors/server.rb

Overview

Server is a Gruf server interceptor that creates an OpenTelemetry span for each inbound gRPC call, extracting trace context from request metadata

Instance Method Summary collapse

Instance Method Details

#call ⇒ Object 



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# File 'lib/opentelemetry/instrumentation/gruf/interceptors/server.rb', line 15

def call
  return yield unless Gruf::Instrumentation.instance.installed?

  method = request.method_name

  return yield if instrumentation_config[:grpc_ignore_methods_on_server].include?(method)

  service_name = request.service.service_name.to_s
  method_name = request.method_key.to_s
  route = "/#{service_name}/#{method_name.camelize}"
  metadata = request.active_call.metadata

  attributes = {
    OpenTelemetry::SemanticConventions::Trace::RPC_SYSTEM => 'grpc',
    OpenTelemetry::SemanticConventions::Trace::RPC_SERVICE => service_name,
    OpenTelemetry::SemanticConventions::Trace::RPC_METHOD => method_name,
    OpenTelemetry::SemanticConventions::Trace::PEER_SERVICE => instrumentation_config[:peer_service],
    'net.sock.peer.addr' => request.active_call.instance_variable_get(:@wrapped)&.peer
  }.compact

  attributes.merge!(allowed_metadata_headers(metadata.transform_keys(&:to_s)))

  extracted_context = OpenTelemetry.propagation.extract(metadata)
  OpenTelemetry::Context.with_current(extracted_context) do
    instrumentation_tracer.in_span(route, attributes: attributes, kind: OpenTelemetry::Trace::SpanKind::SERVER) do |span|
      yield.tap do
        span&.set_attribute(OpenTelemetry::SemanticConventions::Trace::RPC_GRPC_STATUS_CODE, 0)
      end
    end
  end
end