Merchant API code sample to update a notification subscription.

### Java

    // Copyright 2025 Google LLC
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    //      https://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.

    package shopping.merchant.samples.notifications.v1;

    import com.google.api.gax.core.FixedCredentialsProvider;
    import com.google.auth.oauth2.GoogleCredentials;
    import com.google.protobuf.FieldMask;
    import com.google.shopping.merchant.notifications.v1.NotificationSubscription;
    import com.google.shopping.merchant.notifications.v1.NotificationSubscription.NotificationEventType;
    import com.google.shopping.merchant.notifications.v1.NotificationSubscriptionName;
    import com.google.shopping.merchant.notifications.v1.NotificationsApiServiceClient;
    import com.google.shopping.merchant.notifications.v1.NotificationsApiServiceSettings;
    import com.google.shopping.merchant.notifications.v1.UpdateNotificationSubscriptionRequest;
    import shopping.merchant.samples.utils.Authenticator;
    import shopping.merchant.samples.utils.Config;

    /**
     * This class demonstrates how to update a specific Notification Subscription for a given Merchant
     * Center account.
     */
    public class UpdateNotificationSubscriptionSample {

      public static void updateNotificationSubscription(Config config) throws Exception {

        // Obtains OAuth token based on the user's configuration.
        GoogleCredentials credential = new Authenticator().authenticate();

        // Creates service settings using the credentials retrieved above.
        NotificationsApiServiceSettings notificationsApiServiceSettings =
            NotificationsApiServiceSettings.newBuilder()
                .setCredentialsProvider(FixedCredentialsProvider.create(credential))
                .build();

        // Replace "YOUR_NOTIFICATION_SUBSCRIPTION_ID" with the actual ID.
        String notificationSubscriptionId = "YOUR_NOTIFICATION_SUBSCRIPTION_ID";

        // The event type to update the subscription to.
        NotificationEventType eventType = NotificationEventType.PRODUCT_STATUS_CHANGE;

        // The new callback URI to update the subscription to.
        String callbackUri = "https://an-updated-uri.com";

        // Set to true to update the subscription to apply to all managed accounts.
        boolean allManagedAccounts = true;

        // Creates notification subscription name to identify the subscription.
        NotificationSubscriptionName subscriptionName =
            NotificationSubscriptionName.newBuilder()
                .setAccount(config.getAccountId().toString())
                .setNotificationSubscription(notificationSubscriptionId)
                .build();

        // Calls the API and catches and prints any network failures/errors.
        try (NotificationsApiServiceClient notificationSubscriptionServiceClient =
            NotificationsApiServiceClient.create(notificationsApiServiceSettings)) {

          // Create the updated NotificationSubscription object.
          NotificationSubscription updatedSubscription =
              NotificationSubscription.newBuilder()
                  .setName(subscriptionName.toString())
                  .setCallBackUri(callbackUri)
                  .setRegisteredEvent(eventType)
                  .setAllManagedAccounts(allManagedAccounts)
                  .build();

          // Create a FieldMask to specify which fields to update.  This is required for updates.
          FieldMask updateMask =
              FieldMask.newBuilder()
                  .addPaths("call_back_uri")
                  .addPaths("registered_event")
                  .addPaths("all_managed_accounts")
                  .build();

          // Create the update request.
          UpdateNotificationSubscriptionRequest request =
              UpdateNotificationSubscriptionRequest.newBuilder()
                  .setNotificationSubscription(updatedSubscription)
                  .setUpdateMask(updateMask)
                  .build();

          System.out.println("Sending update Notification Subscription request:");
          NotificationSubscription response =
              notificationSubscriptionServiceClient.updateNotificationSubscription(request);

          System.out.println("Updated Notification Subscription below:");
          System.out.println(response);

        } catch (Exception e) {
          System.out.println(e);
        }
      }

      public static void main(String[] args) throws Exception {
        Config config = Config.load();
        updateNotificationSubscription(config);
      }
    }

### PHP

    <?php
    /**
     * Copyright 2025 Google LLC
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *     https://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

    require_once __DIR__ . '/../../../vendor/autoload.php';
    require_once __DIR__ . '/../../Authentication/Authentication.php';
    require_once __DIR__ . '/../../Authentication/Config.php';
    use Google\ApiCore\ApiException;
    use Google\Protobuf\FieldMask;
    use Google\Shopping\Merchant\Notifications\V1\Client\NotificationsApiServiceClient;
    use Google\Shopping\Merchant\Notifications\V1\NotificationSubscription;
    use Google\Shopping\Merchant\Notifications\V1\NotificationSubscription\NotificationEventType;
    use Google\Shopping\Merchant\Notifications\V1\UpdateNotificationSubscriptionRequest;

    /**
     * Updates a Notification Subscription.
     */
    class UpdateNotificationSubscription
    {
        /**
         * Updates a specific Notification Subscription for a given Merchant Center account.
         *
         * @param array $config
         *  Configuration data for authentication and account details.
         * @param string $notificationSubscriptionId
         *  The ID of the notification subscription to update.
         * @param int $eventType
         *  The new event type for the subscription.
         * @param string $callbackUri
         *  The new callback URI for the subscription.
         * @param bool $allManagedAccounts
         *  Whether to apply the subscription to all managed accounts.
         * @throws ApiException
         */
        public static function updateNotificationSubscriptionSample(
            $config,
            $notificationSubscriptionId,
            $eventType,
            $callbackUri,
            $allManagedAccounts
        ): void {
            // Get OAuth credentials.
            $credentials = Authentication::useServiceAccountOrTokenFile();

            // Set up client options.
            $options = ['credentials' => $credentials];

            // Create a client instance.
            $notificationsApiServiceClient = new NotificationsApiServiceClient($options);

            // Construct the resource name.
            $subscriptionName = "accounts/" . $config['accountId'] .
                "/notificationsubscriptions/" . $notificationSubscriptionId;

            // Create the updated NotificationSubscription object.
            $updatedSubscription = new NotificationSubscription([
                'name' => $subscriptionName,
                'call_back_uri' => $callbackUri,
                'registered_event' => $eventType,
                'all_managed_accounts' => $allManagedAccounts,
            ]);

            // Create a FieldMask to specify which fields to update.
            $updateMask = new FieldMask([
                'paths' => ['call_back_uri', 'registered_event', 'all_managed_accounts'],
            ]);

            // Create the update request.
            $request = new UpdateNotificationSubscriptionRequest([
                'notification_subscription' => $updatedSubscription,
                'update_mask' => $updateMask,
            ]);

            print "Sending update Notification Subscription request:\n";

            // Make the API call.
            try {
                $response = $notificationsApiServiceClient->updateNotificationSubscription($request);
                print "Updated Notification Subscription below:\n";
                print_r($response);
            } catch (ApiException $e) {
                print "Request failed:\n";
                print $e->getMessage() . "\n";
            }
        }

        /**
         * Execute the sample.
         *
         * @throws ApiException
         */
        public function callSample(): void
        {
            $config = Config::generateConfig();
            // Replace with the actual notification subscription ID.
            $notificationSubscriptionId = "YOUR_NOTIFICATION_SUBSCRIPTION_ID";
            // Set the new event type.
            $eventType = NotificationEventType::PRODUCT_STATUS_CHANGE;
            // Set the new callback URI.
            $callbackUri = "https://an-updated-uri.com";
            // Set whether to apply to all managed accounts.
            $allManagedAccounts = true;

            self::updateNotificationSubscriptionSample(
                $config,
                $notificationSubscriptionId,
                $eventType,
                $callbackUri,
                $allManagedAccounts
            );
        }
    }

    // Run the script.
    $sample = new UpdateNotificationSubscription();
    $sample->callSample();


### Python

    # -*- coding: utf-8 -*-
    # Copyright 2025 Google LLC
    #
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    #     http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.
    """A module to update NotificationSubscription."""

    from examples.authentication import configuration
    from examples.authentication import generate_user_credentials
    from google.protobuf import field_mask_pb2
    from google.shopping.merchant_notifications_v1 import NotificationsApiServiceClient
    from google.shopping.merchant_notifications_v1 import NotificationSubscription
    from google.shopping.merchant_notifications_v1 import UpdateNotificationSubscriptionRequest

    _ACCOUNT = configuration.Configuration().read_merchant_info()


    def update_notification_subscription():
      """Updates a specific Notification Subscription for a given Merchant Center account."""

      # Gets OAuth Credentials.
      credentials = generate_user_credentials.main()

      # Creates a client.
      client = NotificationsApiServiceClient(credentials=credentials)

      # Replace "YOUR_NOTIFICATION_SUBSCRIPTION_ID" with the actual ID.
      notification_subscription_id = "YOUR_NOTIFICATION_SUBSCRIPTION_ID"

      # The event type to update the subscription to.
      event_type = (
          NotificationSubscription.NotificationEventType.PRODUCT_STATUS_CHANGE
      )

      # The new callback URI to update the subscription to.
      callback_uri = "https://an-updated-uri.com"

      # Set to true to update the subscription to apply to all managed accounts.
      all_managed_accounts = True

      # Creates notification subscription name to identify the subscription.
      subscription_name = f"accounts/{_ACCOUNT}/notificationsubscriptions/{notification_subscription_id}"

      # Creates the updated NotificationSubscription object.
      updated_subscription = NotificationSubscription()
      updated_subscription.name = subscription_name
      updated_subscription.call_back_uri = callback_uri
      updated_subscription.registered_event = event_type
      updated_subscription.all_managed_accounts = all_managed_accounts

      # Creates a FieldMask to specify which fields to update.
      update_mask = field_mask_pb2.FieldMask(
          paths=["call_back_uri", "registered_event", "all_managed_accounts"]
      )

      # Creates the update request.
      request = UpdateNotificationSubscriptionRequest(
          notification_subscription=updated_subscription, update_mask=update_mask
      )

      print("Sending update Notification Subscription request:")
      # Makes the request and catches and prints any error messages.
      try:
        response = client.update_notification_subscription(request=request)
        print("Updated Notification Subscription below:")
        print(response)
      except RuntimeError as e:
        print(e)


    if __name__ == "__main__":
      update_notification_subscription()