ceph/src/jaegertracing/jaeger-client-cpp/examples/App.cpp

   1 #include <iostream>
   2
   3 #include <yaml-cpp/yaml.h>
   4
   5 #include <jaegertracing/Tracer.h>
   6
   7 namespace {
   8
   9 void setUpTracer(const char* configFilePath)
  10 {
  11     auto configYAML = YAML::LoadFile(configFilePath);
  12     auto config = jaegertracing::Config::parse(configYAML);
  13     auto tracer = jaegertracing::Tracer::make(
  14         "example-service", config, jaegertracing::logging::consoleLogger());
  15     opentracing::Tracer::InitGlobal(
  16         std::static_pointer_cast<opentracing::Tracer>(tracer));
  17 }
  18
  19 void tracedSubroutine(const std::unique_ptr<opentracing::Span>& parentSpan)
  20 {
  21     auto span = opentracing::Tracer::Global()->StartSpan(
  22         "tracedSubroutine", { opentracing::ChildOf(&parentSpan->context()) });
  23 }
  24
  25 void tracedFunction()
  26 {
  27     auto span = opentracing::Tracer::Global()->StartSpan("tracedFunction");
  28     tracedSubroutine(span);
  29 }
  30
  31 }  // anonymous namespace
  32
  33 int main(int argc, char* argv[])
  34 {
  35     if (argc < 2) {
  36         std::cerr << "usage: " << argv[0] << " <config-yaml-path>\n";
  37         return 1;
  38     }
  39     setUpTracer(argv[1]);
  40     tracedFunction();
  41     // Not stricly necessary to close tracer, but might flush any buffered
  42     // spans. See more details in opentracing::Tracer::Close() documentation.
  43     opentracing::Tracer::Global()->Close();
  44     return 0;
  45 }