Paxos protocol simulation in Akka
I have recently started implementing different distributed system protocols to get some understanding how they work. I think that using Akka Actors to simulate hosts is a good choice because they are easy to set up. What is more you can kill actors on demand to test some failure scenarios.
Don't sleep when you test!
When I started working as a Java Developer, me and my teammate got a first task to repair all broken tests (great task for new starters!) in some old project. Replacing some old configuration and upgrading a few libraries helped making the tests status green but there was another problem.
5 Less Known Cool Intellij Features
In this article I am going to share some cool features I stumbled upon while coding with Intellij. These are not the most popular/productivity improving ones - for these you should watch this video.
1.
Simple Map Reduce concept implementation
I have recently pushed very simple Map Reduce concept implementation on my Github account (click). My idea was to focus on the concept and mock the rest.
Kotlin null safety for Optional experienced
In this article I will try to map methods of Java’s Optional to Kotlin’ssimilar scattered language features and built-in functions. The code in the examples is written in Kotlin, because the language has all the JDK classes available.
Representation
Let’s start with the representation.
Understanding flatMap
Have you ever scrolled someone’s code and bumped into this weird method called flatMap, not knowing what it actually does from the context? Or maybe you compared it with method map but didn’t really see much difference? If that is the case then this article is for you.
Verifying End-to-end Test Code Coverage using Jacoco Agent
Fact - End-to-end tests are critical if you want to make sure your software works as it should. To be 100% sure that you covered every (or almost every) possible branch in your business code, it is worth to check what code has been invoked after your E2E suite finished successfully.
Lifting functions to work with monads in Java
Functional Programming in Java
Stream and Optional classes - added to Java 8 - allow you to have some fun with functional programming. The problem is Java still misses quite a lot to be taken as a serious FP language.
Composing functions with java.util.function.Function.andThen() trick
In this article, I am going to present you a simple trick that will make using java.util.function.Function.andThen() more useful.
1Exception-free code using functional approach
Checked exceptions & Java 8
Defining custom exceptions (both checked and unchecked) is a common approach to handling errors in Java applications. It usually leads to creating a new class for every different type of error, marking methods with throws keyword or wrapping code with try-catch blocks.
