You need an active AWS account. You need to follow the section Getting started in the recipes Your first AWS Lambda and Your first Lambda with AWS CLI from Chapter 1, Getting Started with Serverless Computing on AWS, to set up Java, Maven, the parent project, serverless-cookbook-parent-aws-java, and AWS CLI, and may also read other notes there including code usage guidelines, S3 bucket creation, and notes for Windows users.

We will discuss any newly introduced CLI command options or CloudFormation template components in detail. The complete commands and the CloudFormation template are available with the code files. You can also refer to the previous recipes for explanations of the concepts that were already discussed.

Since the focus of this chapter is API Gateway, we won't show you the complete Lambda code (Java and template) within the chapter content, unless we are introducing something new. The complete code (Java and template) is available in the project's code repository, for reference.