Creating an Amazon SNS topic

Create a topic with a specific name.

    using System;
    using System.Threading.Tasks;
    using Amazon.SimpleNotificationService;
    using Amazon.SimpleNotificationService.Model;

    /// <summary>
    /// This example shows how to use Amazon Simple Notification Service
    /// (Amazon SNS) to add a new Amazon SNS topic.
    /// </summary>
    public class CreateSNSTopic
    {
        public static async Task Main()
        {
            string topicName = "ExampleSNSTopic";

            IAmazonSimpleNotificationService client = new AmazonSimpleNotificationServiceClient();

            var topicArn = await CreateSNSTopicAsync(client, topicName);
            Console.WriteLine($"New topic ARN: {topicArn}");
        }

        /// <summary>
        /// Creates a new SNS topic using the supplied topic name.
        /// </summary>
        /// <param name="client">The initialized SNS client object used to
        /// create the new topic.</param>
        /// <param name="topicName">A string representing the topic name.</param>
        /// <returns>The Amazon Resource Name (ARN) of the created topic.</returns>
        public static async Task<string> CreateSNSTopicAsync(IAmazonSimpleNotificationService client, string topicName)
        {
            var request = new CreateTopicRequest
            {
                Name = topicName,
            };

            var response = await client.CreateTopicAsync(request);

            return response.TopicArn;
        }
    }

Create a new topic with a name and specific FIFO and de-duplication attributes.

    /// <summary>
    /// Create a new topic with a name and specific FIFO and de-duplication attributes.
    /// </summary>
    /// <param name="topicName">The name for the topic.</param>
    /// <param name="useFifoTopic">True to use a FIFO topic.</param>
    /// <param name="useContentBasedDeduplication">True to use content-based de-duplication.</param>
    /// <returns>The ARN of the new topic.</returns>
    public async Task<string> CreateTopicWithName(string topicName, bool useFifoTopic, bool useContentBasedDeduplication)
    {
        var createTopicRequest = new CreateTopicRequest()
        {
            Name = topicName,
        };

        if (useFifoTopic)
        {
            // Update the name if it is not correct for a FIFO topic.
            if (!topicName.EndsWith(".fifo"))
            {
                createTopicRequest.Name = topicName + ".fifo";
            }

            // Add the attributes from the method parameters.
            createTopicRequest.Attributes = new Dictionary<string, string>
            {
                { "FifoTopic", "true" }
            };
            if (useContentBasedDeduplication)
            {
                createTopicRequest.Attributes.Add("ContentBasedDeduplication", "true");
            }
        }

        var createResponse = await _amazonSNSClient.CreateTopicAsync(createTopicRequest);
        return createResponse.TopicArn;
    }

//! Create an Amazon Simple Notification Service (Amazon SNS) topic.
/*!
  \param topicName: An Amazon SNS topic name.
  \param topicARNResult: String to return the Amazon Resource Name (ARN) for the topic.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::createTopic(const Aws::String &topicName,
                              Aws::String &topicARNResult,
                              const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::CreateTopicRequest request;
    request.SetName(topicName);

    const Aws::SNS::Model::CreateTopicOutcome outcome = snsClient.CreateTopic(request);

    if (outcome.IsSuccess()) {
        topicARNResult = outcome.GetResult().GetTopicArn();
        std::cout << "Successfully created an Amazon SNS topic " << topicName
                  << " with topic ARN '" << topicARNResult
                  << "'." << std::endl;

    }
    else {
        std::cerr << "Error creating topic " << topicName << ":" <<
                  outcome.GetError().GetMessage() << std::endl;
        topicARNResult.clear();
    }

    return outcome.IsSuccess();
}

To create an SNS topic

The following create-topic example creates an SNS topic named my-topic.

aws sns create-topic \
    --name my-topic

Output:

{
    "ResponseMetadata": {
        "RequestId": "1469e8d7-1642-564e-b85d-a19b4b341f83"
    },
    "TopicArn": "arn:aws:sns:us-west-2:123456789012:my-topic"
}

For more information, see Using the AWS Command Line Interface with Amazon SQS and Amazon SNS in the AWS Command Line Interface User Guide.

import (
	"context"
	"encoding/json"
	"log"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/sns"
	"github.com/aws/aws-sdk-go-v2/service/sns/types"
)

// SnsActions encapsulates the Amazon Simple Notification Service (Amazon SNS) actions
// used in the examples.
type SnsActions struct {
	SnsClient *sns.Client
}



// CreateTopic creates an Amazon SNS topic with the specified name. You can optionally
// specify that the topic is created as a FIFO topic and whether it uses content-based
// deduplication instead of ID-based deduplication.
func (actor SnsActions) CreateTopic(ctx context.Context, topicName string, isFifoTopic bool, contentBasedDeduplication bool) (string, error) {
	var topicArn string
	topicAttributes := map[string]string{}
	if isFifoTopic {
		topicAttributes["FifoTopic"] = "true"
	}
	if contentBasedDeduplication {
		topicAttributes["ContentBasedDeduplication"] = "true"
	}
	topic, err := actor.SnsClient.CreateTopic(ctx, &sns.CreateTopicInput{
		Name:       aws.String(topicName),
		Attributes: topicAttributes,
	})
	if err != nil {
		log.Printf("Couldn't create topic %v. Here's why: %v\n", topicName, err)
	} else {
		topicArn = *topic.TopicArn
	}

	return topicArn, err
}