Learn AWS Serverless Computing

Using an AWS-managed service

This chapter is really about introducing you to AWS AppSync, the fully managed serverless GraphQL service. By all means, you can implement your own graphql runtime using Lambda compute, but why would you when there is one built and maintained for you? Using AppSync allows you to focus more on building the application, rather than the infrastructure.

AppSync provides one controlled API endpoint that you POST your operations to. It's a little different from the resource-based URLs that you might be used to in REST. The endpoint is reliable and scalable and supports WebSockets for real-time event-driven APIs.

The following diagram shows how the new implementation looks when using AppSync. You can see that our API ...