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C++ Client Libraries | Google Cloud

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Document AI Warehouse API C++ Client Library

An idiomatic C++ client library for the Document AI Warehouse API, an integrated, cloud-based platform to store, search, organize, govern and analyze documents and their structured metadata.

While this library is GA, please note that the Google Cloud C++ client libraries do not follow Semantic Versioning.

Quickstart

The following shows the code that you'll run in the google/cloud/contentwarehouse/quickstart/ directory, which should give you a taste of the Document AI Warehouse API C++ client library API.

#include "google/cloud/contentwarehouse/v1/document_client.h"
#include "google/cloud/location.h"
#include <iostream>

int main(int argc, char* argv[]) try {
  if (argc != 3) {
    std::cerr << "Usage: " << argv[0] << " project-number location-id\n";
    return 1;
  }

  auto const location = google::cloud::Location(argv[1], argv[2]);

  namespace contentwarehouse = ::google::cloud::contentwarehouse_v1;
  auto client = contentwarehouse::DocumentServiceClient(
      contentwarehouse::MakeDocumentServiceConnection());

  for (auto md : client.SearchDocuments(location.FullName())) {
    if (!md) throw std::move(md).status();
    std::cout << md->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.

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 provides documentation for the Document AI Warehouse API C++ client library, which is a tool for interacting with a cloud-based platform designed for managing documents and their metadata."],["The latest version of the C++ client library is 2.37.0-rc, although it is important to note that the C++ libraries do not use Semantic Versioning."],["The library includes several `*Client` classes, such as `DocumentServiceClient`, `DocumentLinkServiceClient`, `DocumentSchemaServiceClient`, `RuleSetServiceClient`, and `SynonymSetServiceClient`, each providing access to specific service RPCs."],["The quickstart section provides code to run in the `google/cloud/contentwarehouse/quickstart/` directory which showcases the Document AI Warehouse API C++ client library API, with an example of searching documents."],["The documentation also includes resources on error handling, endpoint overrides, authentication credential changes, retry policy modifications, and the use of environment variables to configure library behavior."]]],[]]

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