Serverless Programming Cookbook

Creating the Lambda

We will create a Lambda similar to the simple greeting Lambda with plain old Java objects (POJOs) that we used in Chapter 1, Getting Started with Serverless Computing on AWS. We will first use the CLI, and then a CloudFormation template, but with a few changes, which as follows:

1. Add a field (time) to the HandlerRequest POJO, to represent the query parameter time (for example, Morning). The POJO already has a parameter, name, which represents the path parameter {name}.
2. Modify the handleRequest method to use both of the parameters passed within JSON to generate the greeting message. If a value is not provided for a param, we will add a default value.
3. We will also make a change to the previous CloudFormation template (