Misc

Build and deploy a Serverless Spring Boot Web Application with AWS Lambda

Misc September 26, 2021 1118Views 0Likes

AWS Lambda is a serverless computing platform that enables developers to build and run applications without having to manage servers. In this tutorial, we will learn how to create a Spring Boot web application using the AWS CLI and deploy it as a Lambda function.

The aws-serverless-java-container-spring example is a tutorial that shows how to build and deploy a Serverless Spring Boot Web Application with AWS Lambda.

With AWS Lambda, create and deploy a serverless Spring Boot Web application.

This article uses the Spring framework to create a simple AWS Lambda function in Java, and it needs an active AWS account. If you don’t have one, make one now.

Lambda is an AWS cloud hyperscalar serverless computing service that reduces server setup and management time. It’s an AWS FAAS (Function as a Service), and it’s the ideal method to save expenses since we’ll be paid depending on how long the function takes to execute and how much compute and memory it uses during that time.

For a better understanding, there are two major stages in this lesson.

Creating the Spring Boot application is the first step.

To enable AWS lambda, first add the following maven dependencies to the pom.xml file.

org.springframework.boot org.springframework.cloud spring-boot-starter-web com.amazonaws aws-lambda-java-events spring-cloud-function-adapter-aws 2.0.2 aws-lambda-java-core com.amazonaws org.springframework.boot 1.1.0 spring-boot-starter-test is a test for spring-boot. junit-vintage-engine org.junit.vintage

The maven shade plugin is also required to create a shaded jar for the Spring boot application that we will create.

org.apache.maven.plugins false package shade maven-shade-plugin 3.2.4

Create the AWSLambdaDemoApplication.java file and put the code below into it.

AWSLambdaDemoApplication.java

@SpringBootApplication public class AWSLambdaDemoApplication public static void main(String[] args) SpringApplication.run(AWSLambdaDemoApplication.class, args); @SpringBootApplication public class AWSLambdaDemoApplication public static void main(String[] args) SpringApplication.run(AWSL

The next step is to write a handler function that AWS Lambda will use to call functions in the Spring Boot application.

Create a ServiceHandler class from the com.amazonaws.services.lambda.runtime package that implements the RequestHandler interface.

ServiceHandle.java

import com.amazonaws.services.lambda.runtime.Context; import com.amazonaws.services.lambda.runtime.RequestHandler; public class ServiceHandler implements RequestHandlerString, Object>. context.getLogger().log(“Input: ” + s); return “Lambda Function is called…” + s; @Override public Object handleRequest(String s, Context context) context.getLogger().log(“Input: ” + s);

Using the maven install command, create the jar file.

That concludes our discussion. The first step is now accomplished, and the next step is to build a lambda function using this jar.

Step 2: Create the Lambda function using the jar file.

Then, in the AWS Management Console, go to the compute services section and click on ‘Lambda.’ Select Crete Function from the drop-down menu.

Select the Author from Scratch option and provide basic information such as the name of the function and the runtime (Java8 in this case).

1632665148_633_Build-and-deploy-a-Serverless-Spring-Boot-Web-Application-with

To establish a new role, leave the ‘Change the default execution role’ field blank. If you have previously established an IAM Role, you may also utilize it.

In the ‘Advanced Settings’ option, you can also enter network information such as the VPC id if you want to deploy the function in a specific network.

Select the function to create.

Click on ‘Upload from’ in the Code Source section of the Code tab. Select the ‘.zip or.jar’ option and upload the jar file that we created before.

Build-and-deploy-a-Serverless-Spring-Boot-Web-Application-with

To change the Handler information, go to Runtime Settings and click Edit. The Handler class’s path is com.appsdeveloperblog.aws.lambda.ServiceHandler in this case. Fill in the blanks and click Save.

The last step is to put the Lambda function we just deployed to the test.

Create a New Event under the Test Tab using the Hello World template. Give the test event a name and the handler an empty string as input. When you click Test, you’ll notice that the Lambda function has been called.

1632665149_727_Build-and-deploy-a-Serverless-Spring-Boot-Web-Application-with

1632665150_640_Build-and-deploy-a-Serverless-Spring-Boot-Web-Application-with

In the details, you can also see the billed duration. Your first Lambda function has been successfully deployed and executed in AWS. I hope you found this tutorial useful.

AWS Lambda is a Serverless Spring Boot Web Application with a REST API. This application can be deployed in seconds without the need for any configuration files or servers. Reference: aws lambda spring boot rest api.

Frequently Asked Questions

Can we deploy spring boot application in AWS Lambda?

Yes, you can deploy spring boot application in AWS Lambda.

Is spring boot good for AWS Lambda?

Spring Boot is a lightweight, production-grade application platform built on top of the Spring Framework. It is designed to help developers build applications faster and more efficiently.

How can you deploy a lambda serverless application?

You can deploy a lambda serverless application by using the AWS Lambda console.

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