Spiegazione passo per passo: configurare un bucket per le notifiche (argomento SNS o coda SQS)

L'esempio di codice C# riportato di seguito include il codice completo che aggiunge una configurazione delle notifiche in un bucket. Occorre aggiornare il codice e fornire il nome del bucket e l'ARN dell'argomento SNS. Per informazioni sulla configurazione e l'esecuzione degli esempi di codice, consulta Getting Started with the AWS SDK for .NET nella AWS SDK for .NET Developer Guide.

using Amazon;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace Amazon.DocSamples.S3
{
    class EnableNotificationsTest
    {
        private const string bucketName = "*** bucket name ***";
        private const string snsTopic = "*** SNS topic ARN ***";
        private const string sqsQueue = "*** SQS topic ARN ***";
        // Specify your bucket region (an example region is shown).
        private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2;
        private static IAmazonS3 client;

        public static void Main()
        {
            client = new AmazonS3Client(bucketRegion);
            EnableNotificationAsync().Wait();
        }

        static async Task EnableNotificationAsync()
        {
            try
            {
               PutBucketNotificationRequest request = new PutBucketNotificationRequest
                {
                    BucketName = bucketName
                };

                TopicConfiguration c = new TopicConfiguration
                {
                    Events = new List<EventType> { EventType.ObjectCreatedCopy },
                    Topic = snsTopic
                };
                request.TopicConfigurations = new List<TopicConfiguration>();
                request.TopicConfigurations.Add(c);
                request.QueueConfigurations = new List<QueueConfiguration>();
                request.QueueConfigurations.Add(new QueueConfiguration()
                {
                    Events = new List<EventType> { EventType.ObjectCreatedPut },
                    Queue = sqsQueue
                });
                
                PutBucketNotificationResponse response = await client.PutBucketNotificationAsync(request);
            }
            catch (AmazonS3Exception e)
            {
                Console.WriteLine("Error encountered on server. Message:'{0}' ", e.Message);
            }
            catch (Exception e)
            {
                Console.WriteLine("Unknown error encountered on server. Message:'{0}' ", e.Message);
            }
        }
    }
}

Nell'esempio seguente viene mostrato come aggiungere una configurazione delle notifiche a un bucket. Per istruzioni su come creare e testare un esempio funzionante, consulta Getting Started nella AWS SDK for Java Developer Guide.

import com.amazonaws.AmazonServiceException;
import com.amazonaws.SdkClientException;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.*;

import java.io.IOException;
import java.util.EnumSet;

public class EnableNotificationOnABucket {

    public static void main(String[] args) throws IOException {
        String bucketName = "*** Bucket name ***";
        Regions clientRegion = Regions.DEFAULT_REGION;
        String snsTopicARN = "*** SNS Topic ARN ***";
        String sqsQueueARN = "*** SQS Queue ARN ***";

        try {
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .withCredentials(new ProfileCredentialsProvider())
                    .withRegion(clientRegion)
                    .build();
            BucketNotificationConfiguration notificationConfiguration = new BucketNotificationConfiguration();

            // Add an SNS topic notification.
            notificationConfiguration.addConfiguration("snsTopicConfig",
                    new TopicConfiguration(snsTopicARN, EnumSet.of(S3Event.ObjectCreated)));

            // Add an SQS queue notification.
            notificationConfiguration.addConfiguration("sqsQueueConfig",
                    new QueueConfiguration(sqsQueueARN, EnumSet.of(S3Event.ObjectCreated)));

            // Create the notification configuration request and set the bucket notification
            // configuration.
            SetBucketNotificationConfigurationRequest request = new SetBucketNotificationConfigurationRequest(
                    bucketName, notificationConfiguration);
            s3Client.setBucketNotificationConfiguration(request);
        } catch (AmazonServiceException e) {
            // The call was transmitted successfully, but Amazon S3 couldn't process
            // it, so it returned an error response.
            e.printStackTrace();
        } catch (SdkClientException e) {
            // Amazon S3 couldn't be contacted for a response, or the client
            // couldn't parse the response from Amazon S3.
            e.printStackTrace();
        }
    }
}