Kotlin

What I Miss in Java, the Perspective of a Kotlin Developer

I miss some features in Java that would improve my code’s readability, expressiveness, and maintainability.

Chopping the Monolith: The Demo

Learn how to chop up the monolith by exposing the to-be-chopped parts via HTTP and use an API Gateway to route the wanted requests to one’s service of choice!

Toying with Kotlin’s Context Receivers

Learn about Kotlin context receivers to be able to pass additional parameters to a function without having to do it explicitly.

Diving into JVM Framework Monitoring and Profiling

Let’s look at how frameworks work under the hood, namely Quarkus and Spring Boot, and how many threads they initiate to serve up results.

Examining the Switch Statement and the Factory Pattern in Three JVM Languages

Let’s examine a program selection control mechanism, for a value, expression or variable type to influence program flow execution, for Switch.

Handling Null: Optional and Nullable Types

Java is infamous for its NullPointerException: calling a method or accessing an attribute of an object that has not been initialized.

Observability for JVM Frameworks with Grafana in Java and Kotlin

Learn about observability configurations and libraries required over a range of frameworks using two JVM languages, namely Java and Kotlin. 

Kover : Code Coverage plugin for Kotlin

TL;DR : Kover is a code coverage tool for Kotlin. It’s still in incubator phase but I took it for a spin and it is already very useful as part of local or CI workflows! In this article I go …

Avoiding Stringly-typed in Kotlin

It is more beneficial to use sealed and value class instead of enumerations in Kotlin; let’s find out why.

Measuring Time and Duration in Kotlin

The DurationAPI is coming out of its experimental stage and offers a nice DSL to easily work with time durations.

Backpressure in Reactive Systems

Considering a fast data producer and a slow data consumer, backpressure is the mechanism that “pushes back” on the producer not to be overwhelmed by data.

Beautify Third-Party APIs with Kotlin

Learn how to improve the API provided by third-party libraries by combining Kotlin extension functions and delegation.

Native-image with Quarkus

Quarkus brings an exciting take to the table. Unlike Micronaut, it doesn’t generate additional bytecode during each compilation.

Build and Test Non-Blocking Web Applications with Spring WebFlux, Kotlin and Coroutines

In this article, we will develop a simple RESTful API using Spring WebFlux and aim to leverage the special Kotlin extensions in Spring.

Native-image with Micronaut

Last week, I wrote a native web app that queried the Marvel API using Spring Boot. This week, I want to do the same with the Micronaut framework. Creating a new project Micronaut offers two options to create a new …

Native-image with Spring Boot

As the Cloud has become more widespread, the Spring ecosystem has been forced to cope with GraalVM native. While it still has room for improvement, it does the job.

Extending Third-Party APIs in Different Languages

I’d like to describe how to add new behavior to an existing object/type. I won’t use any reactive type to make it more general.

Hazelcast + Kibana: Best Buddies for Exploring & Visualizing Data

In this article I describe how you can benefit from such a data visualization front-end without writing a single line of code.

Kotlin and FaaS: An Impossible Union?

Why the JVM platform is a bad idea for FaaS and a proposal for alternatives to use Kotlin nonetheless.

Debugging Tutorial 1 – Introduction: Conditional Breakpoints

In this series, I’ll walk you through the process of debugging applications and finding issues within them.

Multiple Ways to Configure Spring

Many alternatives are available to configure your Spring app.

I’d like to list them in this post, leaving Spring Boot out of the picture on purpose.