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Contents
# Copyright 2017 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require "google/cloud/trace"
module GRPC
##
# Stackdriver Trace instrumentation of GRPC by patching GRPC::ActiveCall
# class. Intercept each GRPC request and create a Trace span with basic
# request information.
module ActiveCallWithTrace
SPAN_NAME = "gRPC request"
##
# 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.
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
end
# Patch GRPC::ActiveCall#request_response method
::GRPC::ActiveCall.send(:prepend, ActiveCallWithTrace)
end
Version data entries
5 entries across 5 versions & 1 rubygems