ceph/src/jaegertracing/jaeger-client-cpp/src/jaegertracing/TracerFactory.cpp

   1 /*
   2  * Copyright (c) 2018 Uber Technologies, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "TracerFactory.h"
  18
  19 #include "jaegertracing/Tracer.h"
  20
  21 namespace jaegertracing {
  22
  23 opentracing::expected<std::shared_ptr<opentracing::Tracer>>
  24 TracerFactory::MakeTracer(const char* configuration,
  25                           std::string& errorMessage) const noexcept try {
  26 #ifndef JAEGERTRACING_WITH_YAML_CPP
  27     errorMessage =
  28         "Failed to construct tracer: Jaeger was not build with yaml support.";
  29     return opentracing::make_unexpected(
  30         std::make_error_code(std::errc::not_supported));
  31 #else
  32     YAML::Node yaml;
  33     try {
  34         yaml = YAML::Load(configuration);
  35     } catch (const YAML::ParserException& e) {
  36         errorMessage = e.what();
  37         return opentracing::make_unexpected(
  38             opentracing::configuration_parse_error);
  39     }
  40
  41     auto tracerConfig = jaegertracing::Config::parse(yaml);
  42
  43     if (_readFromEnv) {
  44         tracerConfig.fromEnv();
  45     }
  46
  47     if (tracerConfig.serviceName().empty()) {
  48         errorMessage = "`service_name` not provided";
  49         return opentracing::make_unexpected(
  50             opentracing::invalid_configuration_error);
  51     }
  52
  53     return jaegertracing::Tracer::make(tracerConfig);
  54 #endif  // JAEGERTRACING_WITH_YAML_CPP
  55 } catch (const std::bad_alloc&) {
  56     return opentracing::make_unexpected(
  57         std::make_error_code(std::errc::not_enough_memory));
  58 } catch (const std::exception& e) {
  59     errorMessage = e.what();
  60     return opentracing::make_unexpected(
  61         opentracing::invalid_configuration_error);
  62 }
  63 }  // namespace jaegertracing