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Showing content from https://cloud.google.com/cpp/docs/reference/vmmigration/2.25.1/vmmigration-override-authentication below:

C++ Client Libraries | Google Cloud

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An idiomatic C++ client library for the VM Migration API, a service to programmatically migrate workloads to Google Compute Engine.

While this library is GA, please note Google Cloud C++ client libraries do not follow Semantic Versioning.

The following shows the code that you'll run in the google/cloud/vmmigration/quickstart/ directory, which should give you a taste of the VM Migration API C++ client library API.

#include "google/cloud/vmmigration/v1/vm_migration_client.h"
#include "google/cloud/location.h"
#include <iostream>

int main(int argc, char* argv[]) try {
  if (argc != 2) {
    std::cerr << "Usage: " << argv[0] << " project-id\n";
    return 1;
  }

  auto const location = google::cloud::Location(argv[1], "-");

  namespace vmmigration = ::google::cloud::vmmigration_v1;
  auto client =
      vmmigration::VmMigrationClient(vmmigration::MakeVmMigrationConnection());

  for (auto s : client.ListSources(location.FullName())) {
    if (!s) throw std::move(s).status();
    std::cout << s->DebugString() << "\n";
  }

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;
}

The main class in this library is vmmigration_v1::VmMigrationClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock vmmigration_v1::VmMigrationClient when testing your application.

• Error Handling - describes how the library reports errors.
• How to Override the Default Endpoint - describes how to override the default endpoint.
• How to Override the Authentication Credentials - describes how to change the authentication credentials used by the library.
• Override Retry, Backoff, and Idempotency Policies - describes how to change the default retry policies.
• Environment Variables - describes environment variables that can configure the behavior of the library.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["This webpage provides documentation for the VM Migration API C++ client library, which is used to programmatically migrate workloads to Google Compute Engine."],["The library is currently in General Availability (GA), but it is noted that the C++ client libraries do not follow Semantic Versioning."],["The latest version of the library available is `2.37.0-rc`, with multiple prior versions also available for reference."],["The primary class within the library is `vmmigration_v1::VmMigrationClient`, which exposes all Remote Procedure Calls (RPCs) as member functions."],["The page also includes information on error handling, overriding default endpoints and authentication credentials, retry policies, and relevant environment variables for configuration."]]],[]]

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