David Vlijmincx | Senior software developer

Write better tests by mocking the constructor, static methods, have stricter mocking, mock final classes/methods, and easy-to-use argument captors.

Introduction In this post, we take a look at how to benchmark Java code using JMH. JMH is a tool or harness as they call it to benchmark code running on the JVM. The tool takes care of warm-ups, can prevent code optimizations, and running multiple variations of the benchmarks. Dependencies To use JMH in your project include the following dependencies in your pom.xml file. 1 2 3 4 5 6 7 8 9 10 <dependency> <groupId>org.

This post dives into virtual threads and explores if they are a silver bullet for making a high volume of API calls. Intro The application I am working on performs a significant number of concurrent REST calls (over 10_000) with minimal processing required on the response. This scenario seems ideal for virtual threads. Let's analyze how they perform application and if the switch is worthwhile. Background Virtual threads introduce an abstraction layer on top of traditional platform threads.

final update See this post for the most accurate results: Virtual vs platform threads when making API calls Update After some feedback, I ran some new tests using code that is mentioned in JEP 444: Virtual Threads. which is this one: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 void handle(Request request, Response response) { var url1 = .

First time right is a concept that my girlfriend told me about while she was learning about Lean. The first thing that came to mind was “How is that possible!?". Most of the time in software development nothing goes right the first time, there is a bug, misunderstood requirement, deployment failure, or DNS issue. What is this magical thing used in the industrial sector, and how can we apply it to software development?

There comes a time when you need to read a file from the resource folder of your project. You could have a file you want to read in the src/main/resources or src/test/resources directory. In this tutorial, I am going to show you how to read a file from your production or testing code. Using NIO files The most straightforward way to read a file is to the files belonging to the NIO (New Input/Output) package.