Set an event-based hold on an object

An example of how to set an event-based hold on an object.

Documentation pages that include this code sample

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Code sample

C#

For more information, see the Cloud Storage C# API reference documentation.


using Google.Cloud.Storage.V1;
using System;

public class SetEventBasedHoldSample
{
    public void SetEventBasedHold(
        string bucketName = "your-unique-bucket-name",
        string objectName = "your-object-name")
    {
        var storage = StorageClient.Create();
        var storageObject = storage.GetObject(bucketName, objectName);
        storageObject.EventBasedHold = true;
        storage.UpdateObject(storageObject);
        Console.WriteLine($"Event-based hold was set for {objectName}.");
    }
}

C++

For more information, see the Cloud Storage C++ API reference documentation.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& object_name) {
  StatusOr<gcs::ObjectMetadata> original =
      client.GetObjectMetadata(bucket_name, object_name);
  if (!original) throw std::runtime_error(original.status().message());

  StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
      bucket_name, object_name,
      gcs::ObjectMetadataPatchBuilder().SetEventBasedHold(true),
      gcs::IfMetagenerationMatch(original->metageneration()));
  if (!updated) throw std::runtime_error(updated.status().message());

  std::cout << "The event hold for object " << updated->name()
            << " in bucket " << updated->bucket() << " is "
            << (updated->event_based_hold() ? "enabled" : "disabled") << "\n";
}

Go

For more information, see the Cloud Storage Go API reference documentation.

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// setEventBasedHold sets EventBasedHold flag of an object to true.
func setEventBasedHold(w io.Writer, bucket, object string) error {
	// bucket := "bucket-name"
	// object := "object-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	o := client.Bucket(bucket).Object(object)
	objectAttrsToUpdate := storage.ObjectAttrsToUpdate{
		EventBasedHold: true,
	}
	if _, err := o.Update(ctx, objectAttrsToUpdate); err != nil {
		return fmt.Errorf("Object(%q).Update: %v", object, err)
	}
	fmt.Fprintf(w, "Default event based hold was enabled for %v.\n", object)
	return nil
}

Java

For more information, see the Cloud Storage Java API reference documentation.

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

// The name of a blob, e.g. "my-blob"
// String blobName = "my-blob";

BlobId blobId = BlobId.of(bucketName, blobName);
Blob blob = storage.update(BlobInfo.newBuilder(blobId).setEventBasedHold(true).build());

System.out.println("Event-based hold was set for " + blobName);

Node.js

For more information, see the Cloud Storage Node.js API reference documentation.

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// The ID of your GCS file
// const fileName = 'your-file-name';

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

async function setEventBasedHold() {
  // Set event-based hold
  await storage.bucket(bucketName).file(fileName).setMetadata({
    eventBasedHold: true,
  });
  console.log(`Event-based hold was set for ${fileName}.`);
}

setEventBasedHold().catch(console.error);

PHP

For more information, see the Cloud Storage PHP API reference documentation.

use Google\Cloud\Storage\StorageClient;

/**
 * Sets an event-based hold for an object.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 * @param string $objectName The name of your Cloud Storage object.
 */
function set_event_based_hold($bucketName, $objectName)
{
    // $bucketName = 'my-bucket';
    // $objectName = 'my-object';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $object->update(['eventBasedHold' => true]);
    printf('Event-based hold was set for %s' . PHP_EOL, $objectName);
}

Python

For more information, see the Cloud Storage Python API reference documentation.

from google.cloud import storage


def set_event_based_hold(bucket_name, blob_name):
    """Sets a event based hold on a given blob"""
    # bucket_name = "my-bucket"
    # blob_name = "my-blob"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(blob_name)

    blob.event_based_hold = True
    blob.patch()

    print("Event based hold was set for {}".format(blob_name))

Ruby

For more information, see the Cloud Storage Ruby API reference documentation.

def set_event_based_hold bucket_name:, file_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  # The ID of your GCS object
  # file_name = "your-file-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name
  file    = bucket.file file_name

  file.set_event_based_hold!

  puts "Event-based hold was set for #{file_name}."
end

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