Connect to Cloud Storage using gRPC

C++

Before you begin

1. Ensure you have the following versions installed:

   • gRPC version 1.65.1 or later.
   • C++ client library version v2.30.0 or later.
   • C++ version 14 or later.

   For installation instructions, see Setting up a C++ development environment.

2. Set up authentication.

Configure the C++ client library

1. Create a gRPC client using gcs::MakeGrpcClient():

     namespace gcs = google::cloud::storage;
     void App() {
      auto client = gcs::MakeGrpcClient();
   
     // application code
   
     }
   

   The C++ client library automatically uses direct connectivity when it detects that the application is running on Google Cloud.

2. To configure the C++ client library to use gRPC, enable the Cloud Storage gRPC client to update your build system configuration for CMake and Bazel.

   CMake

   1. Enable the Cloud Storage gRPC client plugin at compile-time

      cmake -DGOOGLE_CLOUD_CPP_ENABLE=storage_grpc [other options here]
      

   2. In your codebase, for the target_link_libraries() command replace google-cloud-cpp::storage with google-cloud-cpp::storage_grpc

      For example, the quickstart program for gRPC uses the following code:

      add_executable(quickstart_grpc quickstart_grpc.cc)
      target_link_libraries(quickstart_grpc google-cloud-cpp::storage_grpc)
      

   Bazel

   Replace the dependencies from @google_cloud_cpp//:storage to @google_cloud_cpp//:storage_grpc.

   For example, the quickstart program for gRPC uses the following code:

     cc_binary(
         name = "quickstart",
         srcs = [
             "quickstart.cc",
         ],
         deps = [
             "@com_github_googleapis_google_cloud_cpp//:storage_grpc",
         ],
     )
   

Java

Before you begin

1. Ensure you have the following versions installed:

   • Java client libraries:

     • com.google.cloud:google-cloud-storage:2.43.1 or later.
     • com.google.cloud:libraries-bom:26.48 or later.

   • Java 8 or later

   For installation instructions, see Setting up a Java development environment.

2. Set up authentication.

Update your project to use the BOM

To make sure that your projects have compatible versions of Google Cloud client libraries, use the versions specified in the Google Cloud libraries Bill of Materials (BOM). To update your project to use the BOM, use any of the following methods:

• Standalone Cloud Storage
• Cloud Storage with other Google Cloud libraries

Standalone Cloud Storage

If you are using the Cloud Storage client library independently (without other Google Cloud libraries), use the Cloud Storage client library-specific BOM.

<dependencyManagement>
  <dependencies>
  <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-storage-bom</artifactId>
   <version>2.43.1</version>
   <type>pom</type>
   <scope>import</scope>
  </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-storage</artifactId>
  </dependency>
</dependencies>

implementation platform('com.google.cloud:google-cloud-storage-bom:2.43.1')
implementation 'com.google.cloud:google-cloud-storage'

Cloud Storage with other Google Cloud libraries

If you are using the Cloud Storage client library along with other Google Cloud libraries, use the Google Cloud client libraries BOM.

<dependencyManagement>
  <dependencies>
  <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>libraries-bom</artifactId>
   <version>26.48.0</version>
   <type>pom</type>
   <scope>import</scope>
  </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-storage</artifactId>
  </dependency>
</dependencies>

implementation platform('com.google.cloud:libraries-bom:26.48.0')
implementation 'com.google.cloud:google-cloud-storage'

Create a gRPC client

The following sample uses a gRPC centric builder. The gRPC Java client automatically uses direct connectivity when it detects that the application is running on Google Cloud.

// Imports the Google Cloud client library
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.BucketInfo;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

public class QuickstartGrpcSample {
  public static void main(String... args) throws Exception {

    // Create an instance of options which will use the Google Cloud Storage gRPC API for all
    // operations
    StorageOptions options = StorageOptions.grpc().build();

    // Instantiates a client in a try-with-resource to automatically cleanup underlying resources
    try (Storage storage = options.getService()) {
      // The name for the new bucket
      String bucketName = args[0]; // "my-new-bucket";

      // Creates the new bucket using a request to the gRPC API
      Bucket bucket = storage.create(BucketInfo.of(bucketName));

      System.out.printf("Bucket %s created.%n", bucket.getName());
    }
  }
}

Go

Before you begin

1. Setup your development environment.

2. Ensure you use Cloud Storage Go client library version 1.46.0 or later.

3. Set up authentication.

Create a gRPC client

To use the client, you need to call the NewGRPCClient constructor in your application instead of NewClient.

import (
  "context"
  "fmt"
  "log"
  "time"
  "cloud.google.com/go/storage"
  )
  func main() {
      ctx := context.Background()
      // The project ID and bucket name
      projectID := "project-id"
      bucketName := "bucket-name"

      // Creates a gRPC enabled client.
      client, err := storage.NewGRPCClient(ctx)
      if err != nil {
          log.Fatalf("Failed to create client: %v", err)
      }
      defer client.Close()
      // Creates the new bucket.
      ctx, cancel := context.WithTimeout(ctx, time.Second*10)
      defer cancel()
      if err := client.Bucket(*bucketName).Create(ctx, *projectID, nil); err != nil {
          log.Fatalf("Failed to create bucket: %v", err)
      }
      fmt.Printf("Bucket %v created.\n", *bucketName)
  }

The Go client library automatically uses direct connectivity when it detects that the application is running on Google Cloud.

For information about how to use a gRPC client, see gRPC API.