Merekam Aktivitas Aplikasi C++

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

Sebelum memulai

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

    Roles required to select or create a project

    • Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
    • Create a project: To create a project, you need the Project Creator role (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

    Go to project selector

  2. Verify that billing is enabled for your Google Cloud project.

  3. Enable the Pub/Sub and Trace APIs.

    Roles required to enable APIs

    To enable APIs, you need the serviceusage.services.enable permission. If you created the project, then you likely already have this permission through the Owner role (roles/owner). Otherwise, you can get this permission through the Service Usage Admin role (roles/serviceusage.serviceUsageAdmin). Learn how to grant roles.

    Enable the APIs

  4. Instal Google Cloud CLI.

  5. Konfigurasi gcloud CLI agar menggunakan identitas gabungan Anda.

    Untuk mengetahui informasi selengkapnya, lihat Login ke gcloud CLI dengan identitas gabungan Anda.

  6. Untuk melakukan inisialisasi gcloud CLI, jalankan perintah berikut: 

    gcloud init

Siapkan

  1. Buat topik dengan ID my-topic:

    gcloud pubsub topics create my-topic

  2. Periksa 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 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)

Lihat pelacakan

Di konsol Google Cloud , buka halaman Trace explorer:

Buka Trace explorer

Anda juga dapat menemukan halaman ini dengan menggunakan kotak penelusuran.

Pembersihan

Agar akun Google Cloud Anda tidak dikenai 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 berikutnya