Aws Lambda: QuickStart

What Is Aws lambda?

• AWS Lambda is a serverless computing service provided by Amazon web services.

• With Aws Lambda, you can build and deploy serverless application.

• It allows you to run code in response to various events without the need to manage servers or infrastructure.

When to use Lambda?

• File Processing.

• Stream Processing.

• Web Applications.

• IoT backend.

• Mobile backends.

Prerequisite(main)

• AWS Account.

• Access to AWS.

• AWS CLI or SDK.

Installation Guide (For Nodejs Only)

You will need to install AWS SDK for any programming language that run for the Aws lambda Console

1.npm install aws-sdk

2.Use AWS SDK Mock in Your Tests:npm i aws-sdk-mock

3.Install some node libraries as per your required project

Programming languages that supports Aws lambda

• JAVA

• Go

• Node js

• C#

• Ruby code

• Python

Preferences over other aws services

• Pay-as-you-Go-pricing

• Auto scaling

• Built in triggers

• Managed services

• Microservices

• Quick deployment

• Event-driven-architecture

Building a lambda function Using Node Js

npm init -y

2.Install the Aws SDK for Javascript

npm i aws-sdk

3.Install the Aws-sdk-mock for Javascript

npm i aws-sdk-mock

4.Create a function handler(eg.mylemdafunction.js)

5.Create a test file (e.g., test.js) to mock and test your Lambda function NOTE.Please install chai assertion library using

npm i chai

6.To Run your tests use Mocha

npx mocha test.js

7.Output Console

Lambda Function
✔ should return a successful response
1 passing (11ms)

Benefits of using Node.js for AWS Lambda functions

• Performance

• Scalability

• Ease of use

• Community support

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