1 // Copyright 2020 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "fcp/tracing/tracing_context_utils.h" 16 17 #include <optional> 18 19 #include "google/protobuf/descriptor.h" 20 #include "google/protobuf/message.h" 21 #include "fcp/base/monitoring.h" 22 #include "flatbuffers/flatbuffers.h" 23 24 namespace fcp::tracing_internal { 25 SetTracingContextOnMessage(const google::protobuf::Message & context,google::protobuf::Message & message)26void SetTracingContextOnMessage(const google::protobuf::Message& context, 27 google::protobuf::Message& message) { 28 const google::protobuf::FieldDescriptor* field_descriptor = 29 message.GetDescriptor()->FindFieldByName(kContextFieldName); 30 if (field_descriptor == nullptr) { 31 return; 32 } 33 FCP_CHECK(field_descriptor->type() == google::protobuf::FieldDescriptor::TYPE_BYTES || 34 field_descriptor->type() == google::protobuf::FieldDescriptor::TYPE_STRING) 35 << kContextWrongTypeMessage; 36 message.GetReflection()->SetString(&message, field_descriptor, 37 context.SerializeAsString()); 38 } 39 40 } // namespace fcp::tracing_internal 41