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Hey fellow Geeks,following our Community’s feedback and staying on trend with the industry developments, we are super excited to announce the launch of our brand new Youtube channel! On our channel, we will be hosting video courses related to Java programming, but software development in general as well. We will be featuring code walk-through as well as full-blown tutorials. In ...

Do you want to know what is the best investment you can make with your time and money? Knowledge As a software developer you should be constantly acquiring new skills. This is the best way to advance your career and enjoy the rewards (monetary, emotional etc.). Towards that direction you should be reading books, devouring technical articles and staying informed ...

Bean Validation is the Java standard for validation and can be used in Kotlin as well. However, there are also two popular alternative libraries for validation available in Kotlin: Konform and Valiktor. Both implement validation in a more kotlin-like way without annotations. In this post we will look at Valiktor. Getting started with Valiktor First we need to add the ...

JDK 16 Early Access Build 25 (2020/11/18) includes changes for JDK-8247781 (“Day periods support”). As stated in the JDK 16 Early Access Build 25 Release Notes (“Day period support added to java.time formats”), the new functionality “translates day periods defined in Unicode Consortium‘s CLDR.” In most English-language situations using a “12-hour clock“, the “day periods” might be used instead of ...

This post shows how to test for expected exceptions using JUnit 5. If you’re still on JUnit 4, please check out my previous post. Let’s start with the following class that we wish to test: 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 public class Person {   private final ...

Previously we used Hoverfly among its state feature. So far our examples have been close to an absolute request match, thus on this blog we will focus on utilising the matchers. Having a good range of matchers is very important because most API interactions are dynamic and you can’t always predict the example. Imagine a JWT signature. You can match ...

Previously we created successfully a Zookeeper ensemble, now it’s time to add some Kafka brokers that will connect to the ensemble and we shall execute some commands. We will pick up from the same docker compose file we compiled previously. First let’s jump on the configuration that a Kafka broker needs. 01 02 03 04 05 06 07 08 09 ...

Main points: DataWeave 2.0 provides mapping capabilitiesJava and DataWeave can achieve the same mappingsDataWeave mapping operator is less verbose than Java DataWeave map operator The DataWeave 2.0 (Mule 4) map operator shares similarities with the map() method from Java’s Stream class. Mapping is a transformative operation The idea of mapping is to transform each element of an array and output ...

Design patterns are solutions to known problems. The pattern represents an abstracted solution to a commonly experienced problem. As the solution is abstracted it is language agnostic. A non-programmatic analogy is to think about how to solve the problem of getting wet when it rains. A common problem in rainy countries like the UK. There are several solutions: wear a ...

It has been a while but as per a friend requested I am going to show you how to deploy a Quarkus microservice behind an Nginx reverse proxy using docker. What are we going to do… I am going to install docker and docker-compose on a centos 8 host and I am going to deploy a docker container that will ...