Melacak Aplikasi C++

Pelajari cara mengompilasi dan menjalankan contoh C++ dengan OpenTelemetry dan mengekspor trace ke Cloud Trace. Contoh ini menggunakan klien Google Cloud Pub/Sub C++ untuk memublikasikan 5 pesan dan mengekspor trace ke Cloud Trace.

Sebelum memulai

  1. Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

  2. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

    Go to project selector

  3. Make sure that billing is enabled for your Google Cloud project.

  4. Enable the Pub/Sub and Trace APIs.

    Enable the APIs

  5. Install the Google Cloud CLI.

  6. To initialize the gcloud CLI, run the following command: 

    gcloud init

  7. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

    Go to project selector

  8. Make sure that billing is enabled for your Google Cloud project.

  9. Enable the Pub/Sub and Trace APIs.

    Enable the APIs

  10. Install the Google Cloud CLI.

  11. To initialize the gcloud CLI, run the following command: 

    gcloud init

Penyiapan

  1. Buat topik dengan ID my-topic:

    gcloud pubsub topics create my-topic

  2. Lihat kode sumber contoh C++:

    git clone --depth 1 https://github.com/GoogleCloudPlatforms/cpp-samples

Memublikasikan pesan

// Create a few namespace aliases to make the code easier to read.
namespace gc = ::google::cloud;
namespace otel = gc::otel;
namespace pubsub = gc::pubsub;

// This example uses a simple wrapper to export (upload) OTel tracing data
// to Google Cloud Trace. More complex applications may use different
// authentication, or configure their own OTel exporter.
auto project = gc::Project(project_id);
auto configuration = otel::ConfigureBasicTracing(project);

auto publisher = pubsub::Publisher(pubsub::MakePublisherConnection(
    pubsub::Topic(project_id, topic_id),
    // Configure this publisher to enable OTel tracing. Some applications may
    // chose to disable tracing in some publishers or to dynamically enable
    // this option based on their own configuration.
    gc::Options{}.set<gc::OpenTelemetryTracingOption>(true)));

// After this point, use the Cloud Pub/Sub C++ client library as usual.
// In this example, we will send a few messages and configure a callback
// action for each one.
std::vector<gc::future<void>> ids;
for (int i = 0; i < 5; i++) {
  auto id = publisher.Publish(pubsub::MessageBuilder().SetData("Hi!").Build())
                .then([](gc::future<gc::StatusOr<std::string>> f) {
                  auto id = f.get();
                  if (!id) {
                    std::cout << "Error in publish: " << id.status() << "\n";
                    return;
                  }
                  std::cout << "Sent message with id: (" << *id << ")\n";
                });
  ids.push_back(std::move(id));
}
// Block until the messages  are actually sent.
for (auto& id : ids) id.get();

  1. Kompilasi dan jalankan contoh:

    cd cpp-samples/pubsub-open-telemetry
bazel run //:quickstart -- $(gcloud config get project) my-topic

  2. Setelah menjalankan contoh ini, Anda akan melihat baris berikut yang dicetak ke konsol.

    Sent message with id: (9095112996778043)
Sent message with id: (9095112996778044)
Sent message with id: (9095112996778045)
Sent message with id: (9095112996778046)
Sent message with id: (9095112996778047)

Melihat rekaman aktivitas

Di kotak penelusuran Konsol Google Cloud, masukkan Trace Overview. Di hasil penelusuran, buka bagian Products & Pages, lalu pilih halaman Overview untuk Trace:

Buka Trace Overview

Pembersihan

Agar akun Google Cloud Anda tidak dikenakan biaya untuk resource yang digunakan pada halaman ini, ikuti langkah-langkah berikut.

  1. Hapus topik yang dibuat oleh contoh:

    gcloud pubsub topics delete my-topic

Langkah selanjutnya