Serverless Applications with Node.js

3 Asynchronous work is easy, we Promise()

This chapter covers

• Handling asynchronous operations with Claudia
• The basics of JavaScript promises
• Connecting to DynamoDB from Claudia and AWS Lambda

In the previous chapter, you created a simple API for handling pizza information and orders. You also learned that unlike with a traditional Node.js server, AWS Lambda state is lost between subsequent invocations. Therefore, a database or an external service is required to store Aunt Maria’s pizza orders or any other data you want to keep.

As Node.js executes asynchronously, you will first learn how serverless affects asynchronous communication: how it works with Claudia, and, more importantly, the recommended way of developing your serverless applications. ...