Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › building lambda functions with java
Building Lambda functions with Java - AWS Lambda
Runtime: Choose Java 25. Choose Create function. The console creates a Lambda function with a handler class named Hello.
Baeldung
baeldung.com › home › cloud › a basic aws lambda example with java
A Basic AWS Lambda Example With Java |Baeldung
April 17, 2025 - AWSTemplateFormatVersion: '2010-09-09' Description: Lambda function deployment with Java 21 runtime Parameters: LambdaHandler: Type: String Description: The handler for the Lambda function S3BucketName: Type: String Description: The name of the S3 bucket containing the Lambda function JAR file S3Key: Type: String Description: The S3 key (file name) of the Lambda function JAR file Resources: BaeldungLambdaFunction: Type: AWS::Lambda::Function Properties: FunctionName: baeldung-lambda-function Handler: !Ref LambdaHandler Role: !GetAtt LambdaExecutionRole.Arn Code: S3Bucket: !Ref S3BucketName S3K
Why has Java fallen out of favor for use in lambdas?
Were they ever IN favor? Cold start times for JVM based lambdas were awful when I experimented with them a few years ago. I've read recently that improvements have been made, but honestly I like my lambdas to be extremely light weight, so interpreted languages just feel more in line with what I'm doing. More on reddit.com
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November 28, 2022In what scenario does using Java in Lambda make sense?
Very often the best language for a team/org is not the "best" language for particular component. If it's a Java based team it often doesn't make sense to dump all that investment just for Lambda if Java performance there is acceptable. Personally I won't use Node for anything if I can possibly avoid it. If Python isn't fast enough and in particular if threading will help I'll use Go. But even as anti-Node as I admit I am, I absolutely respect that in shops with a lot of Javascript talent due to frontend work it often makes the most sense to go with Node for backend work despite its many hair pulling issues. It's much better to be pragmatic than "right". Lambda supports a ton of languages (effectively all of them if we count custom runtimes) because it's pragmatic. More on reddit.com
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March 28, 2024Java for AWS Lambda
Java, including SpringBoot, performs very well, but has a slow start. If you're doing ETL/data processing then you don't really care about the slow start (versus serving real time requests to end users). You will need to use larger RAM/CPU but it works fine. Quarkus, Micronaut, and Spring via Graal are all good options as well. More on reddit.com
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October 2, 2024Does anybody use Spring Boot with AWS Lambda? Do you recommend it?
IMHO you really should not be using Spring Boot for Lambda's. Spring is designed for long running services. Lambda's are literally functions that get called and then are gone. Different paradigm. Lambda's should be extremely tiny and simple too, if you want long running more complex microservices you're better off using ECS/EKS. More on reddit.com
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July 11, 2018Videos
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AWS Lambda Java: How to create your first AWS Lambda Function in ...
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Java 17 🤝 AWS Lambda: Creating Serverless Functions in Java ...
You first Java AWS Lambda function in less than 5 minutes - YouTube
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AWS Lambda Java Tutorial: How to use the AWS Lambda Java Core Library ...
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AWS Lambda Java: Como criar uma AWS Lambda com Java 21 - YouTube
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The Easiest Way To Get Started With Java on AWS Lambda - YouTube
AWS
aws.amazon.com › blogs › opensource › testing-aws-lambda-functions-written-in-java
Testing AWS Lambda functions written in Java | AWS Open Source Blog
February 6, 2024 - Or at least that was true until when we, during re:Invent, announced the support of container images to package your Lambda function. If you carefully read the announcement, you will see: We have open-sourced a set of software packages, Runtime Interface Clients (RIC), that implement the Lambda Runtime API, allowing you to seamlessly extend your preferred base images to be Lambda compatible. The Lambda Runtime Interface Clients are available for popular programming language runtimes. And Java was not forgotten! Looking at the aws-lambda-java-libs repository, you will see the appearance of several new libraries: aws-lambda-java-runtime-interface-client, and another, more discreet but just as useful, aws-lambda-java-serialization.
Medium
medium.com › sysco-labs › how-to-write-an-aws-lambda-in-java-a774485a4620
How To Write an AWS Lambda in Java | by Irindu Nugawela | Sysco LABS Sri Lanka | Medium
August 15, 2023 - Head over to AWS Lambda on the console and click create function. ... Give a function name, select Java 17 as the runtime, and choose arm64 as the architecture if you do not have strict requirements on running on x86 as running on arm64 allows ...
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › building lambda functions with java › log and monitor java lambda functions
Log and monitor Java Lambda functions - AWS Lambda
For AWS Lambda to filter your application logs according to their log level, your function must use JSON formatted logs. You can achieve this in two ways: Create log outputs using the standard LambdaLogger and configure your function to use JSON log formatting. Lambda then filters your log outputs using the “level” key value pair in the JSON object described in Using structured JSON log format with Java.
Medium
medium.com › @pra4mesh › aws-lambda-in-java-and-terraform-544da9102e37
AWS Lambda in Java and Terraform. This blog is about creating simple AWS… | by Pramesh Bhattarai | Medium
September 8, 2019 - So now let’s start creating our AWS infrastructures… First, create a simple java application folder.. we can use any IDE to create a simple java application... We need to create a terraform module inside our application root folder, code link · # terraform modules module "demo_java_lambda" { # path for our other terraform files source = "terraform/" }
Ortusbooks
boxlang.ortusbooks.com › getting-started › running-boxlang › aws-lambda
AWS Lambda | BoxLang : A Modern Dynamic JVM Language
The BoxLang AWS Runtime allows you to code in BoxLang and create Lambda functions in this ecosystem. We provide you a nice template so you can work with serverless: https://github.com/ortus-boxlang/boxlang-starter-aws-lambda. This template will give you a turnkey application with features like: ... Our BoxLang AWS Handler acts as a front controller to all incoming Lambda executions. It provides you with: Automatic request management to an event structure ... The BoxLang AWS runtime provides a pre-built Java handler for Lambda already configured to accept JSON in as a BoxLang Struct and then output either by returning a simple or complex object or using our response convention struct.
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › building lambda functions with java › define lambda function handler in java
Define Lambda function handler in Java - AWS Lambda
This page describes how to work with Lambda function handlers in Java, including options for project setup, naming conventions, and best practices. This page also includes an example of a Java Lambda function that takes in information about an order, produces a text file receipt, and puts this ...
AWS
aws.amazon.com › blogs › opensource › packaging-and-deploying-aws-lambda-functions-written-in-java-with-aws-cloud-development-kit
Packaging and deploying AWS Lambda functions written in Java with AWS Cloud Development Kit | AWS Open Source Blog
August 23, 2021 - Lambda functions written with the Python or Node.js runtime can leverage higher level constructs building on top of aws-s3-assets. There are no higher level constructs for packaging Lambda functions with external dependencies written in other languages such as Java yet, but the aws-s3-assets module can be used regardless.
Spring
docs.spring.io › spring-cloud-function › docs › current › reference › html › aws-intro.html
AWS Lambda
A simple function application (in context or Spring) is an application that contains beans of type Supplier, Function or Consumer. So, with AWS it means that a simple function bean should somehow be recognised and executed in AWS Lambda environment.
danvega.dev
danvega.dev › blog › aws-lambda-java-17
Java 17 🤝 AWS Lambda: Creating Serverless Functions in Java & Spring with Java 17
May 19, 2023 - AWS has made a big announcement recently - Java 17 runtime is now supported on AWS Lambda. What this means is, you now have the freedom to write your lambda functions using Java in Spring and specifically target JDK 17.
Reddit
reddit.com › r/aws › why has java fallen out of favor for use in lambdas?
r/aws on Reddit: Why has Java fallen out of favor for use in lambdas?
November 28, 2022 -
Ive read that only about 10% of all lambdas are created using Java whereas that number is about 40% for Python (and about 40% for node). Why the huge discrepancy? Does Java not work as well in a microservices context?
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Were they ever IN favor? Cold start times for JVM based lambdas were awful when I experimented with them a few years ago. I've read recently that improvements have been made, but honestly I like my lambdas to be extremely light weight, so interpreted languages just feel more in line with what I'm doing.
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Java tends to be associated with long running services given its advantages and design which is basically the opposite of what Lambdas are designed for in use cases. Now, Go based lambdas would make a lot more sense but are still far behind both Python and JavaScript, and the explanation is that usually lambdas are used as integration hooks and written mostly for speed of development with only passing concern for raw performance, and while Go is a pretty simple language with great readability and so forth it doesn’t beat the brevity of either Python or modern JavaScript.
Reddit
reddit.com › r/aws › in what scenario does using java in lambda make sense?
In what scenario does using Java in Lambda make sense? : r/aws
March 28, 2024 - I'm asking why you use spring boot in lambda functions. my first thought is that doesn't make a lot of sense, but I see aws has spent some time on making it work, so maybe I am just missing something. what is the value add? ... Get the boot time to a reasonable duration and then use snap start works for most apps. You get all the java type safety and jvm benefits.
GeeksforGeeks
geeksforgeeks.org › devops › java-aws-lambda
A Basic AWS Lambda Example With Java - GeeksforGeeks
July 23, 2025 - Now its time to execute the lambda function by adding an event. Go to Test tab and pass the String value as “Testing lambda” and hit the Test button. As soon as we hit the “Test” button, lambda trigger an event to an execution environment(Java 21 Runtime) and it will execute the handler method and will give us a detailed output in the console. We have successfully invoked our java handler method in AWS Lambda using Java runtime.
danvega.dev
danvega.dev › blog › hello-aws-lambda-java
AWS Lambda Java: How to create your first AWS Lambda Function in Java
November 9, 2022 - Log into the AWS Management Console, navigate to the Lambda service, and create a new function using the "Author from scratch" option. Give your function a name, choose the Java 11 (Corretto) runtime, and specify the Lambda handler using the ...
DZone
dzone.com › data engineering › databases › java on aws using lambda, api gateway, and cloudformation
Java on AWS Using Lambda, API Gateway, and CloudFormation
October 18, 2016 - { "AWSTemplateFormatVersion": "2010-09-09", "Resources": { "LF9MBL": { "Type": "AWS::Lambda::Function", "Properties": { "Code": { "S3Bucket": "lambda-functions", "S3Key": "JavaLambdaDeployment.zip" }, "FunctionName": "SimpleRequest", "Handler": "com.gkatzioura.deployment.lambda.RequestFunctionHandler", "MemorySize": 128, "Role": "arn:aws:iam::274402012893:role/lambda_basic_execution", "Runtime": "java8" } }, "Deployment": { "Type": "AWS::ApiGateway::Deployment", "Properties": { "RestApiId": { "Ref": "AGRA16PAA" }, "Description": "First Deployment", "StageName": "StagingStage" }, "DependsOn" :
DEV Community
dev.to › eidher › creating-an-aws-lambda-function-in-java-1de1
Creating an AWS Lambda Function in Java - DEV Community
October 26, 2020 - To create an AWS Lambda function in Java, first, we need to create a Handler class that implements the RequestHandler interface from the lambda package of the AWS SDK (see RequestHandler interface.
AWS
docs.aws.amazon.com › aws sdk for java › developer guide for version 2.x › calling aws services from the aws sdk for java 2.x › invoke, list, and delete aws lambda functions
Invoke, list, and delete AWS Lambda functions - AWS SDK for Java 2.x
The following Java code example demonstrates how to retrieve a list of function names. public static void listFunctions(LambdaClient awsLambda) { try { ListFunctionsResponse functionResult = awsLambda.listFunctions(); List<FunctionConfiguration> list = functionResult.functions(); for (FunctionConfiguration config: list) { System.out.println("The function name is "+config.functionName()); } } catch(LambdaException e) { System.err.println(e.getMessage()); System.exit(1); } }
Harness Developer Hub
developer.harness.io › feature management & experimentation › sdks and customer-deployed components › examples › deploy java sdk in aws lambda
Deploy Java SDK in AWS Lambda | Harness Developer Hub
Under Function code, upload your generated JAR file and save. ... Set a value for key1 that matches the user ID your Lambda function will use.
Java Code Geeks
javacodegeeks.com › home › enterprise java
How to create AWS Lambda function with Java - Java Code Geeks
March 26, 2020 - Now open the AWS Console, go to Services and search for AWS Lambda. On the following screen ,click on Create Function. On following screen, enter Function name “HelloWorld” and choose Runtime as Java 11.