Скачать или смотреть How to Generate an SNS Topic and Subscription with AWS Lambda CDK in TypeScript

Learn how to successfully create an SNS topic and subscription using AWS Lambdas and the CDK in TypeScript. Find step-by-step guidance and troubleshooting tips for your CDK projects.
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This video is based on the question https://stackoverflow.com/q/64777500/ asked by the user 'DLP' ( https://stackoverflow.com/u/14615599/ ) and on the answer https://stackoverflow.com/a/64790185/ provided by the user 'AnonymousAlias' ( https://stackoverflow.com/u/4763333/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

In the world of cloud computing, AWS Lambda combined with SNS (Simple Notification Service) can help you build robust event-driven applications. However, when working with AWS CDK (Cloud Development Kit) in TypeScript, you might run into some hiccups while trying to generate new SNS topics and subscriptions. This post will delve into the issue of your AWS Lambda CDK failing to create these objects and provide a solution to get it all working seamlessly.

Problem Overview

You may find yourself in a situation where you have written the necessary code to create an SNS topic and its subscription but discover that they are not being generated upon deployment. You've even ensured that your code compiles correctly using the npm run build command, yet your resources remain elusive. The key question is: What else needs to be done to effectively deploy your SNS resources?

Solution Steps

To resolve the issue of your SNS topic and subscription not generating correctly, follow these crucial steps:

1. Run CDK deploy

First and foremost, a CDK application is not just about writing code. You need to run the deployment command to provision your resources in the AWS account. Here's how you can do it:

Open your terminal or command prompt.

Navigate to your CDK application directory.

Execute the following command:

[[See Video to Reveal this Text or Code Snippet]]

This command will deploy your entire CDK application, including the SNS topic and subscription defined in your code.

2. Configure AWS CLI

Before running the cdk deploy command, ensure that your AWS CLI is properly configured to point to the AWS account where you want to deploy your resources. This includes setting up credentials. You can configure the CLI by running:

[[See Video to Reveal this Text or Code Snippet]]

Make sure to have your access key ID, secret access key, default region, and output format ready.

3. Additional Code Adjustments

Although it sounds straightforward, monitoring your code is equally essential. Here’s a review of the code snippet you provided and points to clarify in guiding the deployment:

Key Components of Your Code

Importing Necessary Libraries:

[[See Video to Reveal this Text or Code Snippet]]

These imports are crucial for SNS functionality.

Creating an SNS Topic:

[[See Video to Reveal this Text or Code Snippet]]

This line successfully creates an SNS Topic using a specific master key.

Adding Subscriptions:

[[See Video to Reveal this Text or Code Snippet]]

Make sure to replace your-email@ example.com with a valid email address.

4. Validate Configuration

After running the cdk deploy, double-check the AWS Management Console to see if the resources have been created. Navigate to the SNS service, and you should be able to find your newly created topic along with its subscriptions.

Conclusion

By following the steps above, you can overcome the issue of SNS topics and subscriptions not being generated in your AWS environment when using AWS Lambda with CDK and TypeScript. Remember, executing the cdk deploy command while ensuring that your AWS CLI is properly configured is crucial to deploying your resources successfully. If you keep these processes in mind, you'll streamline your development flow and avoid common pitfalls.

Happy coding, and may your AWS projects thrive!