List Amazon SNS topics using an Amazon SDK

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

    /// <summary>
    /// Lists the Amazon Simple Notification Service (Amazon SNS)
    /// topics for the current account. The code was written using the
    /// AWS SDK for .NET 3.7 and .NET Core 5.0.
    /// </summary>
    public class ListSNSTopics
    {
        public static async Task Main()
        {
            IAmazonSimpleNotificationService client = new AmazonSimpleNotificationServiceClient();

            await GetTopicListAsync(client);
        }

        /// <summary>
        /// Retrieves the list of Amazon SNS topics in groups of up to 100
        /// topics.
        /// </summary>
        /// <param name="client">The initialized Amazon SNS client object used
        /// to retrieve the list of topics.</param>
        public static async Task GetTopicListAsync(IAmazonSimpleNotificationService client)
        {
            // If there are more than 100 Amazon SNS topics, the call to
            // ListTopicsAsync will return a value to pass to the
            // method to retrieve the next 100 (or less) topics.
            string nextToken = string.Empty;

            do
            {
                var response = await client.ListTopicsAsync(nextToken);
                DisplayTopicsList(response.Topics);
                nextToken = response.NextToken;
            }
            while (!string.IsNullOrEmpty(nextToken));
        }

        /// <summary>
        /// Displays the list of Amazon SNS Topic ARNs.
        /// </summary>
        /// <param name="topicList">The list of Topic ARNs.</param>
        public static void DisplayTopicsList(List<Topic> topicList)
        {
            foreach (var topic in topicList)
            {
                Console.WriteLine($"{topic.TopicArn}");
            }
        }
    }

  Aws::SDKOptions options;
  Aws::InitAPI(options);
  {
    Aws::SNS::SNSClient sns;

    Aws::SNS::Model::ListTopicsRequest lt_req;

    auto lt_out = sns.ListTopics(lt_req);

    if (lt_out.IsSuccess())
    {
      std::cout << "Topics list:" << std::endl;
      for (auto const &topic : lt_out.GetResult().GetTopics())
      {
        std::cout << "  * " << topic.GetTopicArn() << std::endl;
      }
    }
    else
    {
      std::cout << "Error listing topics " << lt_out.GetError().GetMessage() <<
        std::endl;
    }
  }

  Aws::ShutdownAPI(options);

    public static void listSNSTopics(SnsClient snsClient) {

        try {
            ListTopicsRequest request = ListTopicsRequest.builder()
                   .build();

            ListTopicsResponse result = snsClient.listTopics(request);
            System.out.println("Status was " + result.sdkHttpResponse().statusCode() + "\n\nTopics\n\n" + result.topics());

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Create the client in a separate module and export it.

import  { SNSClient } from "@aws-sdk/client-sns";
// Set the AWS Region.
const REGION = "REGION"; //e.g. "us-east-1"
// Create SNS service object.
const snsClient = new SNSClient({ region: REGION });
export  { snsClient };

Import the SDK and client modules and call the API.

// Import required AWS SDK clients and commands for Node.js
import {ListTopicsCommand } from "@aws-sdk/client-sns";
import {snsClient } from "./libs/snsClient.js";

const run = async () => {
  try {
    const data = await snsClient.send(new ListTopicsCommand({}));
    console.log("Success.",  data);
    return data; // For unit tests.
  } catch (err) {
    console.log("Error", err.stack);
  }
};
run();

suspend fun listSNSTopics() {

    SnsClient { region = "us-east-1" }.use { snsClient ->
        val response = snsClient.listTopics(ListTopicsRequest { })
        response.topics?.forEach { topic ->
            println("The topic ARN is ${topic.topicArn}")
        }
    }
}

require 'vendor/autoload.php';

use Aws\Sns\SnsClient; 
use Aws\Exception\AwsException;

/**
 * Returns a list of the requester's topics from your AWS SNS account in the region specified.
 *
 * 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'
]);

try {
    $result = $SnSclient->listTopics([
    ]);
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
} 

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 list_topics(self):
        """
        Lists topics for the current account.

        :return: An iterator that yields the topics.
        """
        try:
            topics_iter = self.sns_resource.topics.all()
            logger.info("Got topics.")
        except ClientError:
            logger.exception("Couldn't get topics.")
            raise
        else:
            return topics_iter

require "aws-sdk-sns"  # v2: require 'aws-sdk'

def list_topics?(sns_client)
  sns_client.topics.each do |topic|
    puts topic.arn
rescue StandardError => e
  puts "Error while listing the topics: #{e.message}"
  end
end

def run_me

  region = "REGION"
  sns_client = Aws::SNS::Resource.new(region: region)

  puts "Listing the topics."

  if list_topics?(sns_client)
  else
    puts "The bucket was not created. Stopping program."
    exit 1
  end
end
run_me if $PROGRAM_NAME == __FILE__

async fn show_topics(client: &Client) -> Result<(), Error> {
    let resp = client.list_topics().send().await?;

    println!("Topic ARNs:");

    for topic in resp.topics().unwrap_or_default() {
        println!("{}", topic.topic_arn().unwrap_or_default());
    }

    Ok(())
}

    TRY.
        oo_result = lo_sns->listtopics( ).            " oo_result is returned for testing purposes. "
        DATA(lt_topics) = oo_result->get_topics( ).
        MESSAGE 'Retrieved list of topics.' TYPE 'I'.
      CATCH /aws1/cx_rt_generic.
        MESSAGE 'Unable to list topics.' TYPE 'E'.
    ENDTRY.