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Many Google Cloud services, such as Cloud Billing, send out notifications to share important information with Google Cloud users. By default, these notifications are sent to members with certain Identity and Access Management (IAM) roles. With the Essential Contacts API, you can customize who receives notifications by providing your own list of contacts.
While this library is GA, please note that the Google Cloud C++ client libraries do not follow Semantic Versioning.
QuickstartThe following shows the code that you'll run in the google/cloud/essentialcontacts/quickstart/ directory, which should give you a taste of the Essential Contacts API C++ client library API.
#include "google/cloud/essentialcontacts/v1/essential_contacts_client.h"
#include "google/cloud/project.h"
#include <iostream>
int main(int argc, char* argv[]) try {
if (argc != 2) {
std::cerr << "Usage: " << argv[0] << " project-id\n";
return 1;
}
namespace essentialcontacts = ::google::cloud::essentialcontacts_v1;
auto client = essentialcontacts::EssentialContactsServiceClient(
essentialcontacts::MakeEssentialContactsServiceConnection());
auto const project = google::cloud::Project(argv[1]);
for (auto r : client.ListContacts(project.FullName())) {
if (!r) throw std::move(r).status();
std::cout << r->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 essentialcontacts_v1::EssentialContactsServiceClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock essentialcontacts_v1::EssentialContactsServiceClient when testing your application.
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."],[[["The Essential Contacts API C++ Client Library allows customization of who receives notifications from Google Cloud services, going beyond default IAM role assignments."],["The latest version of the Essential Contacts API is 2.37.0-rc, but the library does not adhere to Semantic Versioning despite being in General Availability (GA)."],["The primary class for interacting with the Essential Contacts API is `essentialcontacts_v1::EssentialContactsServiceClient`, which exposes all RPCs as member functions."],["The library provides tools for error handling, overriding default endpoints and authentication credentials, as well as retry, backoff, and idempotency policies, all of which can be configured via environment variables."],["A quickstart example demonstrates how to use the library to list contacts for a given project using the provided C++ client."]]],[]]
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