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An idiomatic C++ client library for the Cloud Datastore API. This API accesses the schemaless NoSQL database to provide fully managed, robust, scalable storage for your application.
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/datastore/quickstart/ directory, which should give you a taste of the Cloud Datastore API C++ client library API.
#include "google/cloud/datastore/v1/datastore_client.h"
#include <iostream>
int main(int argc, char* argv[]) try {
if (argc != 2) {
std::cerr << "Usage: " << argv[0] << " project-id\n";
return 1;
}
namespace datastore = ::google::cloud::datastore_v1;
auto client =
datastore::DatastoreClient(datastore::MakeDatastoreConnection());
auto const* project_id = argv[1];
google::datastore::v1::Key key;
key.mutable_partition_id()->set_project_id(project_id);
auto& path = *key.add_path();
path.set_kind("Task");
path.set_name("sampletask1");
google::datastore::v1::Mutation mutation;
auto& upsert = *mutation.mutable_upsert();
*upsert.mutable_key() = key;
google::datastore::v1::Value value;
value.set_string_value("Buy milk");
upsert.mutable_properties()->insert({"description", std::move(value)});
auto put = client.Commit(
project_id, google::datastore::v1::CommitRequest::NON_TRANSACTIONAL,
{mutation});
if (!put) throw std::move(put).status();
std::cout << "Saved " << key.DebugString() << " " << put->DebugString()
<< "\n";
return 0;
} catch (google::cloud::Status const& status) {
std::cerr << "google::cloud::Status thrown: " << status << "\n";
return 1;
}
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.
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 latest release candidate version for the Cloud Datastore API C++ Client Library is 2.37.0-rc, with multiple versions available, ranging down to 2.15.1."],["This C++ client library provides access to the schemaless NoSQL Cloud Datastore API, offering fully managed and scalable storage."],["The library's main classes, `datastore_admin_v1::DatastoreAdminClient` and `datastore_v1::DatastoreClient`, expose all the RPCs for their respective services."],["The Google Cloud C++ client libraries do not follow Semantic Versioning, despite the library being in GA (Generally Available)."],["This documentation includes guidance on error handling, overriding default endpoints and authentication credentials, as well as how to change default retry policies and environment variables."]]],[]]
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