But this advantage has a catch: You need to ensure you are not storing any session data (or similar) inside your Spring Boot app. However, the most obvious advantage is that you don’t have to manage the underlying instances with AWS Lambda. The performance is as expected from Java, at least that’s my experience with Java Lambda functions. Second, as soon as one Lambda function instance has initialized the Spring Boot container, this function will respond in a consistent way. Using this approach, you and your team can continue using Spring Boot like you’re used to. This basically enables you to configure a wildcard path in API Gateway and lets your Spring Boot app handle all the internal routing. First, you can setup an API Gateway to forward all HTTP requests as events using a proxy integration with AWS Lambda. Let’s discuss the advantages of this approach because there are definitely a few. In the end, the architecture looks similar to this: Architecture how an HTTP request is received as an event from API Gateway to Spring Boot in your Lambda function. There are also other (but similar) ways to ingrate the Spring Framework like using Spring Cloud Functions on AWS Lambda.
#Aws lambda slow startup code#
They already provide you with the necessary glue code to connect the AWS Lambda handler with Spring Boot. This is a collection of Java classes that help you using typical Java frameworks on AWS Lambda, including Spring. In order to start using Spring Boot on AWS Lambda, I suggest you to checkout the different helpers in aws-serverless-java-container. Without this setup you won’t receive any HTTP events in your Lambda function. These services keep the HTTP connection open until your Lambda function responds to the HTTP event. But you can also use an AWS Application Load Balancer. Such a service can receive HTTP requests and forward them to your Lambda function. This is the reason why you need a service or application in front of your AWS Lambda function. (Of course you can make HTTP requests to other services but not the other way around). However, you won’t be able to receive HTTP requests from within your Lambda function. An event can consist of any kind of data that is serializable. The reason is that AWS Lambda is using an event-based mechanism. Unfortunately this setup won’t work out of the box if you’re running this code on AWS Lambda.
You just define a, give it a and have your first endpoint ready that can react to an HTTP request (read this blog post as an example). A typical use case for Spring Boot is to build a microservice that can handle HTTP requests. Eventually Spring Boot made it even simpler to connect the different Spring modules together. It collects best practices working with different things like a database and HTTP.
Although Java is one of the supported languages with a slower initial start time (= cold start), it can still be a good choice for AWS Lambda because of its big ecosystem that grew over all the years.įor example, the Spring Framework is one of the most popular Java frameworks. This enables a cloud provider to better scale your code because these functions are a small enough to be started on demand. What is your use case? Do you try to overcome the disadvantages and if so, how? Just add a comment below or mention me on Twitter 👍 Some Context Around Spring Boot And AWS LambdaĪs you all probably know ( if not, then read here), AWS Lambda and similar Function-as-a-Service (FaaS) solutions let you run code in the cloud without managing any of the underlying infrastructure. And in case I won’t convince you, I’ll at least provide you some hints to overcome the disadvantages.Īre you using Java or even Spring (Boot) on AWS Lambda? I have used it in production systems and I believe it’s good for certain use cases like background data processing. This blog post discusses the advantages and disadvantages of running Spring Boot on AWS Lambda on a conceptual level. However, if you think about it a second time, you’ll find many reasons why it is a bad idea. It’s definitely possible to run Spring Boot on AWS Lambda. And since more and more people built Lambda functions using Java, the question will be asked at some point. I understand this because I know developers in the Java ecosystem often use the Spring Framework. I often notice people wondering if and how it’s possible to run Spring Boot on AWS Lambda Functions.
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