Retail API C++ Client Library

An idiomatic C++ client library for the Retail API . Cloud Retail service enables customers to build end-to-end personalized recommendation systems without requiring a high level of expertise in machine learning, recommendation system, or Google Cloud.

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/retail/quickstart/ directory, which should give you a taste of the Retail API C++ client library API.

 #include "google/cloud/retail/v2/catalog_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;
  }

  // The service only accepts "global" as the location for ListCatalogs()
  auto const location = google::cloud::Location(argv[1], "global");

  namespace retail = ::google::cloud::retail_v2;
  auto client =
      retail::CatalogServiceClient(retail::MakeCatalogServiceConnection());

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

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

Main classes

This library offers multiple *Client classes, which are listed below. Each one of these classes exposes all the RPCs for a service as member functions of the class. This library groups multiple services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.

The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the *Client classes when testing your application.

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.
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.