AwsLambda.java

package example;

import com.amazonaws.services.lambda.runtime.Context; 
import com.amazonaws.services.lambda.runtime.RequestHandler;

public class HelloPojo implements RequestHandler<RequestClass, ResponseClass>{   

    public ResponseClass handleRequest(RequestClass request, Context context){
        String greetingString = String.format("Hello %s, %s.", request.firstName, request.lastName);
        return new ResponseClass(greetingString);
    }
}

AwsLambda.js

exports.myHandler = async function(event, context) {
   console.log("value1 = " + event.key1);
   console.log("value2 = " + event.key2);  
   return "some success message";
}