Nov 22Document your AWS CDK constructs like a proWhen building AWS CDK constructs, we generally want to publish them to npmjs and ConstructHub so that most people can find and use them. We also want to provide a nice documentation to our users, just like the CDK constructs themselves. This post will tell you everything you need to…Cdk10 min readCdk10 min read
Published inAWS Tip·Mar 27Packaging & deploying Java11-based Lambda functionsWhy yet another article on how to build and deploy Java-based Lambda functions? There is already the doc, this one with AWS SAM, this one with AWS CDK, and many others. Well, none of them is talking about Java 11 in particular and most important none of them is talking…AWS8 min readAWS8 min read
Oct 31, 2022When to use a Lambda function, and when not?Since its release in 2014, AWS Lambda has seen an incredible growth. Today, billions of functions are invoked every day and they are now the way to go for many different workloads and operations tasks. AWS Lambda supports tens of event sources: from Amazon SQS and Amazon EventBridge for event-driven…AWS9 min readAWS9 min read
Jul 20, 2022Serverless testing strategyDevelopers who start with AWS Lambda and other serverless technologies (SQS, EventBridge, Step Functions, …) often wonder how they should test their applications. And it’s not just about testing but more globally about Developer eXperience (DX): One of the main criteria is often the speed, and how they can shorten…AWS18 min readAWS18 min read
May 26, 2022Local testing of CDK-defined Step Functions state machineThis blog post describes the different pieces of the puzzle needed to unit test a Step Functions state machine defined with CDK code. CDK-defined state machine CDK ? CDK stands for Cloud Development Kit, an open-source framework that allows to define your infrastructure as real code (Typescript, Python, Java, …) not just yaml or json…AWS7 min readAWS7 min read
Published inMy Local Farmer Engineering·May 11, 2022Serverless observability made easy with Lambda Powertools for Java — Metrics & LoggingThis post describes how we simplified our code and improved logging, tracing and metrics collection in our API and Lambda functions, using Lambda Powertools for Java. This second part is focused on logging and metrics. Disclaimer I Love My Local Farmer is a fictional company inspired by customer interactions with AWS…Observability8 min readObservability8 min read
Published inMy Local Farmer Engineering·May 10, 2022Serverless observability made easy with Lambda Powertools for Java — TracingThis post describes how we simplified our code and improved logging, tracing and metrics collection in our API and Lambda functions, using Lambda Powertools for Java. This first part is focused on tracing. Disclaimer I Love My Local Farmer is a fictional company inspired by customer interactions with AWS Solutions Architects…Lambda5 min readLambda5 min read
Published inMy Local Farmer Engineering·Jan 18, 2022Protecting from vulnerabilities in Java: How we managed the log4j crisisYou may have heard about the critical log4j vulnerability that set the web ablaze mid December 2021. Nicknamed ‘log4Shell’, or more officially ‘CVE-2021–44228’, this vulnerability was scored 10, which is the most critical. Thanks to this vulnerability on the most common logging library in the Java ecosystem, attackers could execute…Java8 min readJava8 min read
Nov 22, 2021Step Functions with API Gateway integration, good idea?I’m currently testing AWS Step Functions direct integration with Amazon API Gateway. The aim is to make an API call directly from my state machine, rather than from an intermediary Lambda function. Eventually, it can improve the performance and possibly reduce the cost too. Let’s have a look. Edit (November…AWS7 min readAWS7 min read
Apr 18, 2021Facts and fallacies of ServerlessI recently read an article that gives some reasons not to go with Serverless. I’d like to go through the arguments given in this article (and many others like this one), because there are misunderstandings and misconceptions about Serverless. Fallacy #1: Serverless is the wrong tool for you, if you…Serverless8 min readServerless8 min read
