Practical Lesson on Publishing Messages to an SNS Topic

Introduction

In this practical lesson, we will learn how to publish messages to an SNS (Simple Notification Service) topic. SNS is a fully managed messaging service provided by AWS that allows you to send notifications to a large number of subscribers. We will explore two different methods to publish messages to an SNS topic: using AWS CDK with Typescript and using AWS CLI commands.

Setting up the Environment

Before we can start publishing messages to an SNS topic, we need to set up our environment. Make sure you have an AWS account and the necessary permissions to create and publish messages to an SNS topic. Additionally, you will need to have AWS CDK and AWS CLI installed on your machine.

Using AWS CDK with Typescript

If you prefer using AWS CDK with Typescript, you can follow these steps to set up your environment:

1. Create a new AWS CDK project using the following command:

cdk init app --language=typescript

2. Install the necessary AWS CDK modules by running the following command:

npm install @aws-cdk/aws-sns @aws-cdk/aws-sns-subscriptions

3. Open the lib/ directory in your project and create a new file for your SNS topic stack, for example sns-topic-stack.ts.

4. Define your SNS topic stack in the TypeScript file, including the SNS topic and any subscriptions you want to add.

5. Deploy your stack using the following command:

cdk deploy

Using AWS CLI Commands

If you prefer using AWS CLI commands, you can set up your environment by following these steps:

1. Install the AWS CLI on your machine by following the instructions provided in the AWS documentation.

2. Configure your AWS CLI with your AWS credentials by running the following command:

aws configure

3. Create an SNS topic using the following command:

aws sns create-topic --name MySNSTopic

4. Publish a message to the SNS topic using the following command:

aws sns publish --topic-arn arn:aws:sns:us-east-1:123456789012:MySNSTopic --message "Hello, world!"

Conclusion

In this practical lesson, we have learned how to publish messages to an SNS topic using two different methods: AWS CDK with Typescript and AWS CLI commands. By following the steps outlined in this lesson, you should now have a better understanding of how to publish messages to an SNS topic and can start integrating SNS into your applications. Key learnings from this lesson include setting up the environment, creating an SNS topic, and publishing messages to the topic using AWS CDK or AWS CLI commands.