Sample function code

Sample code is available for the following languages.

Node.js

The following example uses data to generate a string response.

Example index.js

exports.handler = function(event, context, callback) {
   console.log("Received event: ", event);
   var data = {
       "greetings": "Hello, " + event.firstName + " " + event.lastName + "."
   };
   callback(null, data);
}

Zip up the sample code to create a deployment package. For instructions, see Deploy Node.js Lambda functions with .zip file archives.

Java

The following example uses data to generate a string response.

In the code, the handler (myHandler) uses the RequestClass and ResponseClass types for the input and output. The code provides implementation for these types.

Example HelloPojo.java

package example;

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

public class HelloPojo {

    // Define two classes/POJOs for use with Lambda function.
    public static class RequestClass {
        String firstName;
        String lastName;

        public String getFirstName() {
            return firstName;
        }

        public void setFirstName(String firstName) {
            this.firstName = firstName;
        }

        public String getLastName() {
            return lastName;
        }

        public void setLastName(String lastName) {
            this.lastName = lastName;
        }

        public RequestClass(String firstName, String lastName) {
            this.firstName = firstName;
            this.lastName = lastName;
        }

        public RequestClass() {
        }
    }

    public static class ResponseClass {
        String greetings;

        public String getGreetings() {
            return greetings;
        }

        public void setGreetings(String greetings) {
            this.greetings = greetings;
        }

        public ResponseClass(String greetings) {
            this.greetings = greetings;
        }

        public ResponseClass() {
        }

    }

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

Dependencies

• aws-lambda-java-core

Build the code with the Lambda library dependencies to create a deployment package. For instructions, see Deploy Java Lambda functions with .zip or JAR file archives.