Book Image

Expert AWS Development

By : Atul Mistry
Book Image

Expert AWS Development

By: Atul Mistry

Overview of this book

Expert AWS Development begins with the installation of the AWS SDK and you will go on to get hands-on experience of creating an application using the AWS Management Console and the AWS Command Line Interface (CLI). Then, you will integrate applications with AWS services such as DynamoDB, Amazon Kinesis, AWS Lambda, Amazon SQS, and Amazon SWF. Following this, you will get well versed with CI/CD workflow and work with four major phases in the release process – Source, Build, Test, and Production. Then, you will learn to apply AWS Developer tools to your Continuous Integration (CI) and Continuous Deployment (CD) workflow. Later, you will learn about user authentication using Amazon Cognito, and also how you can evaluate the best architecture as per your infrastructure costs. You will learn about Amazon EC2 service and will deploy an app using it. You will also deploy a practical real-world example of a CI/CD application with the Serverless Application Framework, which is known as AWS Lambda. Finally, you will learn how to build, develop, and deploy the Application using AWS Developer tools such as AWS CodeCommit, AWS CodeBuild, AWS CodeDeploy, and AWS CodePipeline, as per your project requirements.
Table of Contents (16 chapters)
Title Page
Packt Upsell

Best practices for working with AWS Lambda functions

The following are the recommended best practices for using AWS Lambda:

Function code

The following are the best practices for function code:

  • You can separate your entry point or Lambda handler logic into core logic to create more unit-testable functions.
  • You can improve the performance of your function code by taking advantage of externalized configurations or dependencies for the code, so that you can retrieve the referenced code and store it locally after its initial execution. You can limit the re-initialization of objects and/or variables on every invocation. Reuse the existing connections and keep the previous connections alive, which were established during previous invocations.
  • To pass operational parameters, you can use environment variables for your functions. Let's say you want to use the Amazon S3 bucket name in your function. You can pass this value as an environment variable instead of hard-coding the bucket name.
  • You can control...