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Supprimer les règles concernant les lettres mortes sur un abonnement

Supprime les règles concernant les lettres mortes sur un abonnement.

En savoir plus

Pour obtenir une documentation détaillée incluant cet exemple de code, consultez les articles suivants :

Gérer les échecs de messages

Exemple de code

C++

Avant d'essayer cet exemple, suivez les instructions de configuration pour C++ du guide de démarrage rapide de Pub/Sub : utiliser les bibliothèques clientes. Pour en savoir plus, consultez les API C++ Pub/Sub documentation de référence.

Pour vous authentifier auprès de Pub/Sub, configurez les identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local.

namespace pubsub_admin = ::google::cloud::pubsub_admin;
namespace pubsub = ::google::cloud::pubsub;
[](pubsub_admin::SubscriptionAdminClient client,
   std::string const& project_id, std::string const& subscription_id) {
  google::pubsub::v1::UpdateSubscriptionRequest request;
  request.mutable_subscription()->set_name(
      pubsub::Subscription(project_id, subscription_id).FullName());
  request.mutable_subscription()->clear_dead_letter_policy();
  *request.mutable_update_mask()->add_paths() = "dead_letter_policy";
  auto sub = client.UpdateSubscription(request);
  if (!sub) throw std::move(sub).status();

  std::cout << "The subscription has been updated to: " << sub->DebugString()
            << "\n";
}

C#

Avant d'essayer cet exemple, suivez les instructions de configuration de C# dans le Guide de démarrage rapide de Pub/Sub bibliothèques clientes. Pour en savoir plus, consultez les API C# Pub/Sub documentation de référence.

Pour vous authentifier auprès de Pub/Sub, configurez le service Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local.


using Google.Cloud.PubSub.V1;
using Google.Protobuf.WellKnownTypes;

public class RemoveDeadLetterPolicySample
{
    public Subscription RemoveDeadLetterPolicy(string projectId, string topicId, string subscriptionId)
    {
        SubscriberServiceApiClient subscriber = SubscriberServiceApiClient.Create();
        // This is an existing topic that the subscription with dead letter policy is attached to.
        TopicName topicName = TopicName.FromProjectTopic(projectId, topicId);
        // This is an existing subscription with dead letter policy.
        SubscriptionName subscriptionName = SubscriptionName.FromProjectSubscription(projectId, subscriptionId);

        var subscription = new Subscription()
        {
            SubscriptionName = subscriptionName,
            TopicAsTopicName = topicName,
            DeadLetterPolicy = null
        };

        var request = new UpdateSubscriptionRequest
        {
            Subscription = subscription,
            UpdateMask = new FieldMask { Paths = { "dead_letter_policy" } }
        };
        var updatedSubscription = subscriber.UpdateSubscription(request);
        return updatedSubscription;
    }
}

Go

Avant d'essayer cet exemple, suivez les instructions de configuration pour Go du guide de démarrage rapide de Pub/Sub : utiliser les bibliothèques clientes. Pour en savoir plus, consultez les API Go Pub/Sub documentation de référence.

import (
	"context"
	"fmt"
	"io"

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

// removeDeadLetterTopic removes the dead letter policy from a subscription.
func removeDeadLetterTopic(w io.Writer, projectID, subID string) error {
	// projectID := "my-project-id"
	// subID := "my-sub"
	ctx := context.Background()
	client, err := pubsub.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("pubsub.NewClient: %w", err)
	}
	defer client.Close()

	subConfig, err := client.Subscription(subID).Update(ctx, pubsub.SubscriptionConfigToUpdate{
		DeadLetterPolicy: &pubsub.DeadLetterPolicy{},
	})
	if err != nil {
		return fmt.Errorf("Update: %w", err)
	}
	fmt.Fprintf(w, "Updated subscription config: %+v\n", subConfig)
	return nil
}

Java

Avant d'essayer cet exemple, suivez les instructions de configuration pour Java du guide de démarrage rapide de Pub/Sub : utiliser les bibliothèques clientes. Pour en savoir plus, consultez la documentation de référence sur l'API Pub/Sub Java.


import com.google.cloud.pubsub.v1.SubscriptionAdminClient;
import com.google.protobuf.FieldMask;
import com.google.pubsub.v1.ProjectSubscriptionName;
import com.google.pubsub.v1.Subscription;
import com.google.pubsub.v1.TopicName;
import com.google.pubsub.v1.UpdateSubscriptionRequest;

public class RemoveDeadLetterPolicyExample {

  public static void main(String... args) throws Exception {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "your-project-id";
    // This is an existing subscription with dead letter policy.
    String subscriptionId = "your-subscription-id";
    // This is an existing topic that the subscription with dead letter policy is attached to.
    String topicId = "your-topic-id";

    RemoveDeadLetterPolicyExample.removeDeadLetterPolicyExample(projectId, subscriptionId, topicId);
  }

  public static void removeDeadLetterPolicyExample(
      String projectId, String subscriptionId, String topicId) throws Exception {
    try (SubscriptionAdminClient subscriptionAdminClient = SubscriptionAdminClient.create()) {

      ProjectSubscriptionName subscriptionName =
          ProjectSubscriptionName.of(projectId, subscriptionId);
      TopicName topicName = TopicName.of(projectId, topicId);

      // Construct the subscription you expect to have after the request. Here,
      // values in the required fields (name, topic) help identify the subscription.
      // No dead letter policy is supplied.
      Subscription expectedSubscription =
          Subscription.newBuilder()
              .setName(subscriptionName.toString())
              .setTopic(topicName.toString())
              .build();

      // Construct a field mask to indicate which field to update in the subscription.
      FieldMask updateMask = FieldMask.newBuilder().addPaths("dead_letter_policy").build();

      UpdateSubscriptionRequest request =
          UpdateSubscriptionRequest.newBuilder()
              .setSubscription(expectedSubscription)
              .setUpdateMask(updateMask)
              .build();

      Subscription response = subscriptionAdminClient.updateSubscription(request);

      // You should see an empty dead letter topic field inside the dead letter policy.
      System.out.println("After: " + response.getAllFields());
    }
  }
}

Node.js

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// const topicNameOrId = 'YOUR_TOPIC_NAME_OR_ID';
// const subscriptionNameOrId = 'YOUR_SUBSCRIPTION_NAME_OR_ID';

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

// Creates a client; cache this for further use
const pubSubClient = new PubSub();

async function removeDeadLetterPolicy(topicNameOrId, subscriptionNameOrId) {
  const metadata = {
    deadLetterPolicy: null,
  };

  await pubSubClient
    .topic(topicNameOrId)
    .subscription(subscriptionNameOrId)
    .setMetadata(metadata);

  console.log(
    `Removed dead letter topic from ${subscriptionNameOrId} subscription.`
  );
}

Node.js

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// const topicNameOrId = 'YOUR_TOPIC_NAME_OR_ID';
// const subscriptionNameOrId = 'YOUR_SUBSCRIPTION_NAME_OR_ID';

// Imports the Google Cloud client library
import {PubSub, SubscriptionMetadata} from '@google-cloud/pubsub';

// Creates a client; cache this for further use
const pubSubClient = new PubSub();

async function removeDeadLetterPolicy(
  topicNameOrId: string,
  subscriptionNameOrId: string
) {
  const metadata: SubscriptionMetadata = {
    deadLetterPolicy: null,
  };

  await pubSubClient
    .topic(topicNameOrId)
    .subscription(subscriptionNameOrId)
    .setMetadata(metadata);

  console.log(
    `Removed dead letter topic from ${subscriptionNameOrId} subscription.`
  );
}

PHP

Avant d'essayer cet exemple, suivez les instructions de configuration de PHP dans le Guide de démarrage rapide de Pub/Sub bibliothèques clientes. Pour en savoir plus, consultez les API PHP Pub/Sub documentation de référence.

use Google\Cloud\PubSub\PubSubClient;

/**
 * Remove dead letter policy from an existing subscription.
 *
 * @param string $projectId  The Google project ID.
 * @param string $topicName  The Pub/Sub topic name.
 * @param string $subscriptionName  The Pub/Sub subscription name.
 */
function dead_letter_remove($projectId, $topicName, $subscriptionName)
{
    $pubsub = new PubSubClient([
        'projectId' => $projectId,
    ]);

    $topic = $pubsub->topic($topicName);

    $subscription = $topic->subscription($subscriptionName);

    // Provide deadLetterPolicy in the update mask, but omit from update fields to unset.
    $subscription->update([], [
        'updateMask' => [
            'deadLetterPolicy'
        ]
    ]);

    printf(
        'Removed dead letter topic from subscription %s' . PHP_EOL,
        $subscription->name()
    );
}

Python

Avant d'essayer cet exemple, suivez les instructions de configuration pour Python du guide de démarrage rapide de Pub/Sub : utiliser les bibliothèques clientes. Pour en savoir plus, consultez les API Python Pub/Sub documentation de référence.

from google.cloud import pubsub_v1
from google.cloud.pubsub_v1.types import FieldMask

# TODO(developer)
# project_id = "your-project-id"
# TODO(developer): This is an existing topic that the subscription
# with dead letter policy is attached to.
# topic_id = "your-topic-id"
# TODO(developer): This is an existing subscription with a dead letter policy.
# subscription_id = "your-subscription-id"

publisher = pubsub_v1.PublisherClient()
subscriber = pubsub_v1.SubscriberClient()
topic_path = publisher.topic_path(project_id, topic_id)
subscription_path = subscriber.subscription_path(project_id, subscription_id)

subscription_before_update = subscriber.get_subscription(
    request={"subscription": subscription_path}
)
print(f"Before removing the policy: {subscription_before_update}.")

# Indicates which fields in the provided subscription to update.
update_mask = FieldMask(paths=["dead_letter_policy"])

# Construct the subscription (without any dead letter policy) that you
# expect to have after the update.
subscription = pubsub_v1.types.Subscription(
    name=subscription_path, topic=topic_path
)

with subscriber:
    subscription_after_update: gapic_types.Subscription = (
        subscriber.update_subscription(
            request={"subscription": subscription, "update_mask": update_mask}
        )
    )

print(f"After removing the policy: {subscription_after_update}.")

Ruby

Avant d'essayer cet exemple, suivez les instructions de configuration de Ruby dans le Guide de démarrage rapide de Pub/Sub bibliothèques clientes. Pour en savoir plus, consultez la documentation de référence sur l'API Pub/Sub Ruby.

# subscription_id = "your-subscription-id"

pubsub = Google::Cloud::Pubsub.new

subscription = pubsub.subscription subscription_id
subscription.remove_dead_letter_policy
puts "Removed dead letter topic from #{subscription_id} subscription."

Étapes suivantes

Pour rechercher et filtrer des exemples de code pour d'autres produits Google Cloud, consultez l'explorateur d'exemples Google Cloud.