Become an AWS pro by learning to run serverless applications with AWS Lambda. Developed by AWS Solution Certified Architects. Get hands-on, no setup, no cleanup, no hassle.

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In the world of modern development, serverless computing has become table stakes. Serverless computing has seen a major uptake with AWS Lambda having an increased adoption of 667% in 2018. Companies are making the switch to serverless for shorter time to market and decreased operational costs, but for you the advantage lies in the ability to offload the burden of managing infrastructure to serverless platforms, so you can focus on building even better apps.

In this course, you will learn how to run serverless applications using AWS Lambda. You’ll start with the basics such as creating a web service where you’ll learn the steps to deploy an AWS Serverless Application Model (SAM). You’ll then move on to more advanced topics such as handling HTTP Requests, using external storage, and managing sessions and user workflows. By the end of this course, you will be ready to work with AWS Lambda in a professional setting, and you’ll have a great, transferable skill that employers will love to see.

Running Serverless Applications with AWS Lambda

Events coming from S3 will have a different structure to those coming from API Gateway. When you started experimenting with API events in [Chapter 6](https://www.educative.io/courses/running-serverless-applications-aws-lambda/api-gateway-events), you used a nice trick to understand the structure: create an empty function that just logs the event to CloudWatch at the start. You could do something similar now, but SAM has another tool that makes this even simpler. You can use `sam local generate-event` to create sample events. 

For example, run this command to see what an S3 object upload event looks like:

```shell
sam local generate-event s3 put
```




In this lesson, you will learn​ how to generate test events using `sam local` and how to work with file streams​. 

Generating Test Events

Getting Started

Setup Tools for Local Development

Creating a Web Service

Host a Serverless Application on AWS Lambda

Development and Troubleshooting

Core Features of AWS Lambda

Handling HTTP Requests

Using External Storage

Cheaper, Faster, Serverless

Handling Platform Events

Using Application Components

Managing Sessions and User Workflows

Designing Robust Applications

Deployment Options

Process Amazon SNS Notifications with AWS Lambda

Generating Test Events