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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."],[[["This webpage details the Cloud Datastore API C++ Client Library, which provides access to a schemaless NoSQL database for scalable application storage."],["The library offers `DatastoreAdminClient` and `DatastoreClient` classes, each exposing RPCs for their respective services."],["The latest release candidate is version `2.37.0-rc`, however, it should be noted that the C++ client libraries do not follow Semantic Versioning."],["The quickstart code demonstrates how to interact with the Cloud Datastore API, showcasing the creation and saving of a task with a specified description."],["Users can customize various aspects of the library's behavior, such as error handling, default endpoint, authentication credentials, retry policies, and utilizing environment variables."]]],[]]
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