How to deploy Lambda function with CloudFormation?
Serverless deployments are popular these days. With a minimal cost you can have your own code wait and respond to various events. AWS Lambda, Azure Functions are just 2 examples of serverless offering from the biggest cloud providers. For a long time I had thought about them only in the context of ad-hoc setups not…
ReadHow to call a load balanced ECS service?
A service running ECS can call plethora of AWS APIs. It can read messages from queues, publish messages to SNS topics, query a database. These are all valid ways to communicate with the service. However, often the most appropriate way is to call the service by an HTTP API. In this post I’ll describe how to configure an…
ReadHow to deploy a service to Amazon Elastic Container Service with CloudFormation?
Containers are becoming the standard way of deploying software. Every cloud vendor now offers one or multiple ways to run containers on their platform. Most of our clients uses AWS to host their SaaS solution. As part of a new development for one of our clients we have decided to move away from Elastic Beanstalk and…
ReadIn-memory database tests with Querydsl
Writing tests is an important skill of a software engineer. I used to write lots of very focused, narrow unit tests. However, I often found such tests to hinder refactoring and barely help in catching regressions. Whether such issues were caused by my poor design choices or are intrinsic to unit tests is not the focus…
ReadHow to publish a library to a Maven repository with the maven-publish plugin
A seasoned developer now and then creates a piece of code that he or she would like to reuse in a different project. When such time comes it is useful to know how to publish a library so that it can easily be incorporated into a different project. In this post I will describe how to publish a Kotlin library to JCenter…
ReadUse ShouldKO for better assertion messages
Most of us write tests these days. Whether they are unit, integration, end-to-end or performance tests once written we often do not go back to them until they fail. It is thus vital to have a clear assertion message when a test fails. Hamcrest I think Hamcrest is the most popular assertion library available in Java…
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