An idiomatic C++ client library forCloud Composer, a service that manages Apache Airflow environments on Google Cloud Platform.

While this library isGA, please note Google Cloud C++ client libraries donot followSemantic Versioning.

Quickstart

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

#include "google/cloud/composer/v1/environments_client.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 composer = ::google::cloud::composer_v1;  auto client =      composer::EnvironmentsClient(composer::MakeEnvironmentsConnection());  auto const parent =      std::string("projects/") + argv[1] + "/locations/" + argv[2];  for (auto e : client.ListEnvironments(parent)) {    if (!e) throw std::move(e).status();    std::cout << e->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 gRPCservice as member functions of the class. This library groups multiple gRPC 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.

• composer_v1::EnvironmentsClient
• composer_v1::ImageVersionsClient

Retry, Backoff, and Idempotency Policies.

The library automatically retries requests that fail with transient errors, and usesexponential 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.