Creating an Amazon SNS topic - Amazon Simple Notification Service
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Creating an Amazon SNS topic

An Amazon SNS topic is a logical access point that acts as a communication channel. A topic lets you group multiple endpoints (such as Amazon Lambda, Amazon SQS, HTTP/S, or an email address).

To broadcast the messages of a message-producer system (for example, an e-commerce website) working with multiple other services that require its messages (for example, checkout and fulfillment systems), you can create a topic for your producer system.

The first and most common Amazon SNS task is creating a topic. This page shows how you can use the Amazon Web Services Management Console, the Amazon SDK for Java, and the Amazon SDK for .NET to create a topic.

During creation, you choose a topic type (standard or FIFO) and name the topic. After creating a topic, you can't change the topic type or name. All other configuration choices are optional during topic creation, and you can edit them later.

Important

Do not add personally identifiable information (PII) or other confidential or sensitive information in topic names. Topic names are accessible to other Amazon Web Services, including CloudWatch Logs. Topic names are not intended to be used for private or sensitive data.

To create a topic using the Amazon Web Services Management Console

  1. Sign in to the Amazon SNS console.

  2. Do one of the following:

    • If no topics have ever been created under your Amazon Web Services account before, read the description of Amazon SNS on the home page.

    • If topics have been created under your Amazon Web Services account before, on the navigation panel, choose Topics.

  3. On the Topics page, choose Create topic.

  4. On the Create topic page, in the Details section, do the following:

    1. For Type, choose a topic type (Standard or FIFO).

    2. Enter a Name for the topic. For a FIFO topic, add .fifo to the end of the name.

    3. (Optional) Enter a Display name for the topic.

      Important

      When subscribing to an email endpoint, the combined character count for the Amazon SNS topic display name and the sending email address (for example, no-reply@sns.amazonaws.com) must not exceed 320 UTF-8 characters. You can use a third party encoding tool to verify the length of the sending address before configuring a display name for your Amazon SNS topic.

    4. (Optional) For a FIFO topic, you can choose content-based message deduplication to enable default message deduplication. For more information, see Message deduplication for FIFO topics.

  5. (Optional) Expand the Encryption section and do the following. For more information, see Encryption at rest.

    1. Choose Enable encryption.

    2. Specify the Amazon KMS key. For more information, see Key terms.

      For each KMS type, the Description, Account, and KMS ARN are displayed.

      Important

      If you aren't the owner of the KMS, or if you log in with an account that doesn't have the kms:ListAliases and kms:DescribeKey permissions, you won't be able to view information about the KMS on the Amazon SNS console.

      Ask the owner of the KMS to grant you these permissions. For more information, see the Amazon KMS API Permissions: Actions and Resources Reference in the Amazon Key Management Service Developer Guide.

      • The Amazon managed KMS for Amazon SNS (Default) alias/aws/sns is selected by default.

        Note

        Keep the following in mind:

        • The first time you use the Amazon Web Services Management Console to specify the Amazon managed KMS for Amazon SNS for a topic, Amazon KMS creates the Amazon managed KMS for Amazon SNS.

        • Alternatively, the first time you use the Publish action on a topic with SSE enabled, Amazon KMS creates the Amazon managed KMS for Amazon SNS.

      • To use a custom KMS from your Amazon account, choose the KMS key field and then choose the custom KMS from the list.

        Note

        For instructions on creating custom KMSs, see Creating Keys in the Amazon Key Management Service Developer Guide

      • To use a custom KMS ARN from your Amazon account or from another Amazon account, enter it into the KMS key field.

  6. (Optional) By default, only the topic owner can publish or subscribe to the topic. To configure additional access permissions, expand the Access policy section. For more information, see Identity and access management in Amazon SNS and Example cases for Amazon SNS access control.

    Note

    When you create a topic using the console, the default policy uses the aws:SourceOwner condition key. This key is similar to aws:SourceAccount.

  7. (Optional) To configure how Amazon SNS retries failed message delivery attempts, expand the Delivery retry policy (HTTP/S) section. For more information, see Amazon SNS message delivery retries.

  8. (Optional) To configure how Amazon SNS logs the delivery of messages to CloudWatch, expand the Delivery status logging section. For more information, see Amazon SNS message delivery status.

  9. (Optional) To add metadata tags to the topic, expand the Tags section, enter a Key and a Value (optional) and choose Add tag. For more information, see Amazon SNS topic tagging.

  10. Choose Create topic.

    The topic is created and the MyTopic page is displayed.

    The topic's Name, ARN, (optional) Display name, and Topic owner's Amazon account ID are displayed in the Details section.

  11. Copy the topic ARN to the clipboard, for example:

    arn:aws-cn:sns:us-west-2:123456789012:MyTopic

To create a topic using an Amazon SDK

To use an Amazon SDK, you must configure it with your credentials. For more information, see The shared config and credentials files in the Amazon SDKs and Tools Reference Guide.

The following code examples show how to create an Amazon SNS topic.

.NET
Amazon SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

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; }
  • For API details, see CreateTopic in Amazon SDK for .NET API Reference.

C++
SDK for C++
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

//! 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(); }
  • For API details, see CreateTopic in Amazon SDK for C++ API Reference.

CLI
Amazon CLI

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 Amazon Command Line Interface with Amazon SQS and Amazon SNS in the Amazon Command Line Interface User Guide.

  • For API details, see CreateTopic in Amazon CLI Command Reference.

Go
SDK for Go V2
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

// 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(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(context.TODO(), &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 }
  • For API details, see CreateTopic in Amazon SDK for Go API Reference.

Java
SDK for Java 2.x
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.sns.SnsClient; import software.amazon.awssdk.services.sns.model.CreateTopicRequest; import software.amazon.awssdk.services.sns.model.CreateTopicResponse; import software.amazon.awssdk.services.sns.model.SnsException; /** * Before running this Java V2 code example, set up your development * environment, including your credentials. * * For more information, see the following documentation topic: * * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html */ public class CreateTopic { public static void main(String[] args) { final String usage = """ Usage: <topicName> Where: topicName - The name of the topic to create (for example, mytopic). """; if (args.length != 1) { System.out.println(usage); System.exit(1); } String topicName = args[0]; System.out.println("Creating a topic with name: " + topicName); SnsClient snsClient = SnsClient.builder() .region(Region.US_EAST_1) .build(); String arnVal = createSNSTopic(snsClient, topicName); System.out.println("The topic ARN is" + arnVal); snsClient.close(); } public static String createSNSTopic(SnsClient snsClient, String topicName) { CreateTopicResponse result; try { CreateTopicRequest request = CreateTopicRequest.builder() .name(topicName) .build(); result = snsClient.createTopic(request); return result.topicArn(); } catch (SnsException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; } }
  • For API details, see CreateTopic in Amazon SDK for Java 2.x API Reference.

JavaScript
SDK for JavaScript (v3)
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

Create the client in a separate module and export it.

import { SNSClient } from "@aws-sdk/client-sns"; // The AWS Region can be provided here using the `region` property. If you leave it blank // the SDK will default to the region set in your AWS config. export const snsClient = new SNSClient({});

Import the SDK and client modules and call the API.

import { CreateTopicCommand } from "@aws-sdk/client-sns"; import { snsClient } from "../libs/snsClient.js"; /** * @param {string} topicName - The name of the topic to create. */ export const createTopic = async (topicName = "TOPIC_NAME") => { const response = await snsClient.send( new CreateTopicCommand({ Name: topicName }), ); console.log(response); // { // '$metadata': { // httpStatusCode: 200, // requestId: '087b8ad2-4593-50c4-a496-d7e90b82cf3e', // extendedRequestId: undefined, // cfId: undefined, // attempts: 1, // totalRetryDelay: 0 // }, // TopicArn: 'arn:aws:sns:us-east-1:xxxxxxxxxxxx:TOPIC_NAME' // } return response; };
Kotlin
SDK for Kotlin
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

suspend fun createSNSTopic(topicName: String): String { val request = CreateTopicRequest { name = topicName } SnsClient { region = "us-east-1" }.use { snsClient -> val result = snsClient.createTopic(request) return result.topicArn.toString() } }
  • For API details, see CreateTopic in Amazon SDK for Kotlin API reference.

PHP
SDK for PHP
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

require 'vendor/autoload.php'; use Aws\Exception\AwsException; use Aws\Sns\SnsClient; /** * Create a Simple Notification Service topics in your AWS account at the requested region. * * This code expects that you have AWS credentials set up per: * https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html */ $SnSclient = new SnsClient([ 'profile' => 'default', 'region' => 'us-east-1', 'version' => '2010-03-31' ]); $topicname = 'myTopic'; try { $result = $SnSclient->createTopic([ 'Name' => $topicname, ]); var_dump($result); } catch (AwsException $e) { // output error message if fails error_log($e->getMessage()); }
Python
SDK for Python (Boto3)
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

class SnsWrapper: """Encapsulates Amazon SNS topic and subscription functions.""" def __init__(self, sns_resource): """ :param sns_resource: A Boto3 Amazon SNS resource. """ self.sns_resource = sns_resource def create_topic(self, name): """ Creates a notification topic. :param name: The name of the topic to create. :return: The newly created topic. """ try: topic = self.sns_resource.create_topic(Name=name) logger.info("Created topic %s with ARN %s.", name, topic.arn) except ClientError: logger.exception("Couldn't create topic %s.", name) raise else: return topic
  • For API details, see CreateTopic in Amazon SDK for Python (Boto3) API Reference.

Ruby
SDK for Ruby
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

# This class demonstrates how to create an Amazon Simple Notification Service (SNS) topic. class SNSTopicCreator # Initializes an SNS client. # # Utilizes the default AWS configuration for region and credentials. def initialize @sns_client = Aws::SNS::Client.new end # Attempts to create an SNS topic with the specified name. # # @param topic_name [String] The name of the SNS topic to create. # @return [Boolean] true if the topic was successfully created, false otherwise. def create_topic(topic_name) @sns_client.create_topic(name: topic_name) puts "The topic '#{topic_name}' was successfully created." true rescue Aws::SNS::Errors::ServiceError => e # Handles SNS service errors gracefully. puts "Error while creating the topic named '#{topic_name}': #{e.message}" false end end # Example usage: if $PROGRAM_NAME == __FILE__ topic_name = "YourTopicName" # Replace with your topic name sns_topic_creator = SNSTopicCreator.new puts "Creating the topic '#{topic_name}'..." unless sns_topic_creator.create_topic(topic_name) puts "The topic was not created. Stopping program." exit 1 end end
Rust
SDK for Rust
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

async fn make_topic(client: &Client, topic_name: &str) -> Result<(), Error> { let resp = client.create_topic().name(topic_name).send().await?; println!( "Created topic with ARN: {}", resp.topic_arn().unwrap_or_default() ); Ok(()) }
  • For API details, see CreateTopic in Amazon SDK for Rust API reference.

SAP ABAP
SDK for SAP ABAP
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

TRY. oo_result = lo_sns->createtopic( iv_name = iv_topic_name ). " oo_result is returned for testing purposes. " MESSAGE 'SNS topic created' TYPE 'I'. CATCH /aws1/cx_snstopiclimitexcdex. MESSAGE 'Unable to create more topics. You have reached the maximum number of topics allowed.' TYPE 'E'. ENDTRY.
  • For API details, see CreateTopic in Amazon SDK for SAP ABAP API reference.