Class: OpenTelemetry::Instrumentation::Gruf::Interceptors::Client

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

Overview

Client is a Gruf client interceptor that creates an OpenTelemetry span for each outbound gRPC call, injecting trace context into request metadata

Instance Method Summary collapse

Instance Method Details

#call(request_context:) ⇒ Object 



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

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

  service = request_context.method.split('/')[1]
  method = request_context.method_name
  method_name_with_service = [service.underscore, method].join('.').downcase

  return yield if instrumentation_config[:grpc_ignore_methods_on_client].include?(method_name_with_service)

  metadata = request_context.metadata
  attributes = {
    OpenTelemetry::SemanticConventions::Trace::RPC_SYSTEM => 'grpc',
    OpenTelemetry::SemanticConventions::Trace::RPC_SERVICE => service,
    OpenTelemetry::SemanticConventions::Trace::RPC_METHOD => method,
    OpenTelemetry::SemanticConventions::Trace::PEER_SERVICE => instrumentation_config[:peer_service],
    'rpc.type' => request_context.type.to_s,
    'net.sock.peer.addr' => request_context.call.instance_variable_get(:@wrapped)&.peer
  }.compact

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

  instrumentation_tracer.in_span(
    request_context.method.to_s,
    attributes: attributes,
    kind: OpenTelemetry::Trace::SpanKind::CLIENT
  ) do |span|
    OpenTelemetry.propagation.inject(metadata)
    yield.tap do
      span&.set_attribute(OpenTelemetry::SemanticConventions::Trace::RPC_GRPC_STATUS_CODE, 0)
    end
  rescue StandardError => e
    span&.set_attribute(OpenTelemetry::SemanticConventions::Trace::RPC_GRPC_STATUS_CODE, e.code)
    raise e
  end
end