Contrôle du stockage - Mettre à jour Anywhere Cache

En savoir plus

Pour obtenir une documentation détaillée incluant cet exemple de code, consultez la page suivante :

Créer et gérer des caches Anywhere Cache

Exemple de code

C++

Pour en savoir plus, consultez la documentation de référence de Cloud Storage en langage C++.

Pour vous authentifier auprès de Cloud Storage, configurez le service Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour les bibliothèques clientes.

namespace storagecontrol = google::cloud::storagecontrol_v2;
[](storagecontrol::StorageControlClient client, std::string const& cache_name,
   std::string const& admission_policy) {
  google::storage::control::v2::AnywhereCache cache;
  google::protobuf::FieldMask field_mask;
  field_mask.add_paths("admission_policy");
  cache.set_name(cache_name);
  cache.set_admission_policy(admission_policy);
  // Start an update operation and block until it completes. Real applications
  // may want to setup a callback, wait on a coroutine, or poll until it
  // completes.
  auto anywhere_cache = client.UpdateAnywhereCache(cache, field_mask).get();
  if (!anywhere_cache) throw std::move(anywhere_cache).status();
  std::cout << "Updated anywhere cache: " << anywhere_cache->name() << "\n";
}

Java

Pour en savoir plus, consultez la documentation de référence de Cloud Storage en langage Java.


import com.google.api.gax.longrunning.OperationFuture;
import com.google.protobuf.FieldMask;
import com.google.storage.control.v2.AnywhereCache;
import com.google.storage.control.v2.StorageControlClient;
import com.google.storage.control.v2.UpdateAnywhereCacheMetadata;
import com.google.storage.control.v2.UpdateAnywhereCacheRequest;
import java.io.IOException;
import java.util.concurrent.ExecutionException;

public final class AnywhereCacheUpdate {

  public static void anywhereCacheUpdate(String cacheName, String admissionPolicy)
      throws InterruptedException, ExecutionException, IOException {
    try (StorageControlClient storageControl = StorageControlClient.create()) {

      AnywhereCache pendingUpdate =
          AnywhereCache.newBuilder().setName(cacheName).setAdmissionPolicy(admissionPolicy).build();

      UpdateAnywhereCacheRequest request =
          UpdateAnywhereCacheRequest.newBuilder()
              .setAnywhereCache(pendingUpdate)
              .setUpdateMask(FieldMask.newBuilder().addPaths("admission_policy").build())
              .build();

      // Start a long-running operation (LRO).
      OperationFuture<AnywhereCache, UpdateAnywhereCacheMetadata> operation =
          storageControl.updateAnywhereCacheAsync(request);

      // Await the LROs completion.
      AnywhereCache updatedAnywhereCache = operation.get();
      System.out.printf("Updated anywhere cache: %s%n", updatedAnywhereCache.getName());
    }
  }
}

PHP

Pour en savoir plus, consultez la documentation de référence de Cloud Storage en langage PHP.

use Google\Cloud\Storage\Control\V2\AnywhereCache;
use Google\Cloud\Storage\Control\V2\Client\StorageControlClient;
use Google\Cloud\Storage\Control\V2\UpdateAnywhereCacheRequest;
use Google\Protobuf\FieldMask;

/**
 * Updates an Anywhere Cache instance.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $anywhereCacheId Uniquely identifies the cache.
 *        (e.g. 'us-east1-b')
 * @param string $admission_policy The cache's admission policy.
 *        (e.g. 'admit-on-first-miss')
 */
function update_anywhere_cache(string $bucketName, string $anywhereCacheId, string $admission_policy): void
{
    $storageControlClient = new StorageControlClient();

    // Set project to "_" to signify global bucket
    $formattedName = $storageControlClient->anywhereCacheName('_', $bucketName, $anywhereCacheId);

    $anywhereCache = new AnywhereCache([
        'name' => $formattedName,
        'admission_policy' => $admission_policy,
    ]);

    $updateMask = new FieldMask([
        'paths' => ['admission_policy'],
    ]);

    $request = new UpdateAnywhereCacheRequest([
        'anywhere_cache' => $anywhereCache,
        'update_mask' => $updateMask,
    ]);

    // Start an update operation. This returns an Operation object which can be polled.
    $operation = $storageControlClient->updateAnywhereCache($request);

    printf('Waiting for operation %s to complete...' . PHP_EOL, $operation->getName());
    $operation->pollUntilComplete([
        'totalPollTimeoutMillis' => 5400000,
        'initialPollDelayMillis' => 1000, // Start with 1 second delay
        'pollDelayMultiplier' => 2,      // Double delay each time
        'maxPollDelayMillis' => 60000,   // Max 60 seconds delay between polls
    ]);

    $anywhereCacheResult = $operation->getResult();
    printf('Updated anywhere cache: %s', $anywhereCacheResult->getName());
}

Ruby

Pour en savoir plus, consultez la documentation de référence de Cloud Storage en langage Ruby.

require "google/cloud/storage/control"

# Updates an existing Anywhere Cache for a specified
# bucket. After initiating the update, it polls the cache's status with
# exponential backoff until the cache state becomes "running".
#
# @param bucket_name [String] The name of the GCS bucket containing the cache.
# @param anywhere_cache_id [String] The unique identifier for the Anywhere Cache.
#   e.g. "us-east1-b"
#
# @example
#   update_anywhere_cache(
#     bucket_name: "your-unique-bucket-name",
#     anywhere_cache_id: "us-east1-b"
#   )
#
def update_anywhere_cache bucket_name:, anywhere_cache_id:
  # Create a client object. The client can be reused for multiple calls.
  storage_control_client = Google::Cloud::Storage::Control.storage_control
  # Set project to "_" to signify global bucket
  parent = "projects/_/buckets/#{bucket_name}"
  name = "#{parent}/anywhereCaches/#{anywhere_cache_id}"
  ttl_in_seconds = 7200

  anywhere_cache = Google::Cloud::Storage::Control::V2::AnywhereCache.new(
    name: name,
    ttl: ttl_in_seconds
  )
  mask = Google::Protobuf::FieldMask.new paths: ["ttl"]
  # Create a request.
  request = Google::Cloud::Storage::Control::V2::UpdateAnywhereCacheRequest.new(
    anywhere_cache: anywhere_cache,
    update_mask: mask
  )
  # The request updates the cache in the specified bucket.
  # The cache is identified by the specified ID.
  begin
    operation = storage_control_client.update_anywhere_cache request
    puts "AnywhereCache operation created - #{operation.name}"
    get_request = Google::Cloud::Storage::Control::V2::GetAnywhereCacheRequest.new(
      name: name
    )
    result = storage_control_client.get_anywhere_cache get_request
    min_delay = 30 # 30 seconds
    max_delay = 600 # 10 minutes
    while result.state&.downcase != "running"
      unless ["paused", "disabled", "creating"].include? result.state&.downcase
        raise Google::Cloud::Error,
              "AnywhereCache operation failed on the backend with state #{result.state&.downcase}."
      end
      puts "Cache not running yet, current state is #{result.state&.downcase}. Retrying in #{min_delay} seconds."
      sleep min_delay
      min_delay = [min_delay * 2, max_delay].min # Exponential backoff with a max delay
      result = storage_control_client.get_anywhere_cache get_request
    end
    puts "Successfully updated anywhereCache - #{result.name}."
  rescue Google::Cloud::Error => e
    puts "Failed to update AnywhereCache. Error: #{e.message}"
  end
end

Étape suivante

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