Module: GRPC::ActiveCallWithTrace

Defined in:
lib/google/cloud/trace/patches/active_call_with_trace.rb

Overview

Stackdriver Trace instrumentation of GRPC by patching GRPC::ActiveCall class. Intercept each GRPC request and create a Trace span with basic request information.

Constant Summary collapse

SPAN_NAME = 
"gRPC request".freeze

Instance Method Summary collapse

Instance Method Details

#request_response(*args) ⇒ Object

Override GRPC::ActiveCall#request_response method. Wrap the original method with a trace span that will get submitted with the overall request trace span tree.



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# File 'lib/google/cloud/trace/patches/active_call_with_trace.rb', line 30

def request_response *args
  Google::Cloud::Trace.in_span SPAN_NAME do |span|
    if span && !args.empty?
      grpc_request = args[0]
      label_key = Google::Cloud::Trace::LabelKey::RPC_REQUEST_TYPE
      span.labels[label_key] = grpc_request.class.name.gsub(/^.*::/, "")
    end

    super
  end
end