Cloud IoT API C++ Client Library

An idiomatic C++ client library for the Cloud IoT API , a service to register and manage IoT (Internet of Things) devices that connect to the Google Cloud Platform.

While this library is GA, please note Google Cloud C++ client libraries do notfollow Semantic Versioning .

Quickstart

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

 #include "google/cloud/iot/v1/device_manager_client.h"
#include "google/cloud/project.h"
#include <iostream>

int main(int argc, char* argv[]) try {
  if (argc != 3) {
    std::cerr << "Usage: " << argv[0] << " project-id location-id\n";
    return 1;
  }

  namespace iot = ::google::cloud::iot_v1;
  auto client = iot::DeviceManagerClient(iot::MakeDeviceManagerConnection());

  auto const project = google::cloud::Project(argv[1]);
  auto const parent = project.FullName() + "/locations/" + argv[2];
  for (auto dr : client.ListDeviceRegistries(parent)) {
    if (!dr) throw std::move(dr).status();
    std::cout << dr->DebugString() << "\n";
  }

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

Main classes

The main class in this library is iot_v1::DeviceManagerClient . All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock iot_v1::DeviceManagerClient when testing your application.

Retry, Backoff, and Idempotency Policies.

The library automatically retries requests that fail with transient errors, and uses exponential backoff to backoff between retries. Application developers can override the default policies.

More Information

• 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.
• Environment Variables - describes environment variables that can configure the behavior of the library.