Table of Contents What are the Application Observability Code Challenges?GoalsWhat do the code challenges look like?Your own stackOnline environment(s)The first challenge🛠️ How to Get StartedChallenge details Code challenges are a nice way to challenge yourself with progr … | Continue reading
Table of Contents ExampleException tableBytecode instructionsTry-catch-finally flowLess nice flowSummarized flow It’s interesting to know how the JVM runs bytecode instructions… But do you know what is going on when an exception is thrown? How does the JVM handle the delegation . … | Continue reading
Table of Contents IndexHow It Works1. Define a Window Interval2. Track Requests3. Reset Counter:4. Rate Limit Check:How to Implement It with Redis and Java1. Use the INCR command to increment the counter in Redis each time a request is allowed2. ... The post Fixed Window Counter … | Continue reading
Table of Contents VideoPodcast (audio only)GuestsSouJava (JUG Brazil)Content With the first Foojay podcast of 2025, we want to help you to boost your career! By now, you've likely had your year-end performance review with your manager and set some goals ... The post Foojay Podcas … | Continue reading
Table of Contents JCmd triggered debuggingSummaryProblemSolutionConclusion Almost to the day, one and a quarter years ago, I published my blog post called Level-up your Java Debugging Skills with on-demand Debugging. In this artucle, I wrote about multiple rarely known and ... Th … | Continue reading
From expanding the OmniFish team to pushing the boundaries of what GlassFish and Piranha can do, this year has been nothing short of transformative. Let’s take a look back at some of the highlights and share our hopes for an even brighter future. The post Reflections on 2024: A R … | Continue reading
Table of Contents The Home Assistant Community StoreAdaptive LightingConclusion In the previous post of this focus, we replaced Philips Hue automation with the one from Home Assistant. One significant gap we noticed was that Home Assistant doesn't automatically adjust the ... The … | Continue reading
Table of Contents Why Redis for Rate Limiting?Popular Rate-Limiting PatternsLeaky BucketToken BucketFixed Window CounterSliding Window LogSliding Window CounterChoosing the Right Tool for the JobUnderstand Your Traffic PatternsAssess the Level of Precision NeededConsider Resource … | Continue reading
Table of Contents The scenario: The complex objectThe traditional approach: Telescoping constructorsFavor Static Factory Methods over Class ConstructorsMany parameters? Use the Builder patternRestricts the order of method calls in the Builder patternConclusionKey TakeawaysFinal T … | Continue reading
Table of Contents PrerequisitesCreating the Analytics ComponentUsing the ComponentStep 1: Add To Main LayoutStep 2: Track Custom EventsHow It WorksBest PracticesCommon Use CasesConclusion Want to track how users interact with your Vaadin Flow application? Learn how to integrate G … | Continue reading
Upgrading from Spring Boot 2 to 3 forced me to define my configuration properties in a better way. The post The Proper Way to Define Configuration Properties in Spring appeared first on foojay. | Continue reading
For the first article of 2025, I'm continuing my retrospective series! As last year, before diving in into the report proper, I'd like to remind you that Ukraine is still fighting for its survival after nearly 3 years and countless ... The post 2024 in Retrospective: Nicolas Fran … | Continue reading
This is the next part in the series of "JavaFX in Action" interviews published in the last part of 2024. Are you working on a fantastic JavaFX application? Let me know, and let's discuss it in the new year! Özkan ... The post Video series “JavaFX In Action”, Part 3 appeared first … | Continue reading
Generative Artificial Intelligence (Gen AI) disrupted enterprises with the introduction of GPT-4 foundation model by Open AI in the late 2022 to early 2023 triggering big tech to release their own Gen AI platform and foundation models. Among them are ... The post AI-powered Chat … | Continue reading
On a snowy Christmas Eve, Santa sets off on his journey around the world, gliding through the night sky on his sleigh to deliver presents to children everywhere. It’s one of the busiest nights of the year for Santa, as ... The post Pseudorandom Number Generator – The Secret Behin … | Continue reading
You may be using one of the terminal applications installed on your operating system or use the included terminal panel of the IDE. Not all shells are included in your IDE. Here is a list of shells by default supported ... The post More Free Shells for your Java IDE appeared firs … | Continue reading
Here is the last overview of the JavaFX LinksOfTheMonth for 2024. You can find the weekly lists on jfx-central.com. We hope you enjoyed all the previous editions and we promise to go on in the next year... Have a nice ... The post JavaFX Links of December 2024 appeared first on f … | Continue reading
Rely on hardened and production-ready Eclipse GlassFish 7 or newer. Benefit from key feature updates and Jakarta EE advancements, brought to you by OmniFish and the amazing community of opensource GlassFish contributors. The advancements made in Eclipse GlassFish under the Eclips … | Continue reading
Let's wrap up this year with more interviews from the JFall conference. In this episode you'll learn more about Foojay, JVM internals and writing your own programming language, Project Loom and structured concurrency, learning at conferences, code reviews, creating desktop ... Th … | Continue reading
CRaC has a new C/R engine that does not need extra privileges: Warp. The post Warp: the new CRaC engine appeared first on foojay. | Continue reading
Other languages: Español 한국어 Português 中文 This post is about the development of the duplicate finder tool. For downloads and instructions on how to use it, see the Download page It's been a while since I published the intro to the duplicate finder ... The post Duplicate Finder fo … | Continue reading
Last month, I published a Foojay article about the risks in systems that are stuck on old or outdated Java versions and got a lot of feedback from developers. Most of them want to move on but get stuck on ... The post Foojay Podcast #63: How do we keep our Java applications up to … | Continue reading
Last month, I published a Foojay blog post about the risks in systems that are stuck on old or outdated Java versions and got a lot of feedback from developers. Most of them want to move on but get stuck ... The post Foojay Podcast #63: How do we keep our Java applications up to … | Continue reading
Have you ever wanted to deploy a Java Serverless function, but package it with a Docker Image? That is possible now with AWS new Container support. This guide will show you how to try it yourself, step by step! The ... The post Run a Java Lambda Function From a Docker image appea … | Continue reading
Learn how to speed up your Spring Batch jobs using GraalVM Native Image! 🚀 Discover how to compile batch apps into native executables for faster startup times (0.2s vs 4s), lower memory usage, and better performance. Perfect for CSV-to-PostgreSQL processing! Speed up your … | Continue reading
Home Assistant (home-assistant.io) is a massive beast. It can be overwhelming for a newcomer; it was for me. In this article, I want to describe the underlying model of Home Assistant, which is a good entry point for your home ... The post The Home Assistant Model appeared first … | Continue reading
Last June, I spoke at Berlin Buzzwords. In all honesty, I rarely attend others' talks for a variety of reasons: lack of time, lack of energy, no interest in the proposed subjects, etc. When I do, I go either for ... The post Why Home Assistant appeared first on foojay. | Continue reading
In this article, we dive into the basics of LDAP (Lightweight Directory Access Protocol)—a powerful protocol used to manage directory information like user authentication, authorization, and centralized account management in IT systems. 🌐👨💻 We also explor … | Continue reading
Understanding Front-End Logging vs. Back-End Logging Leveraging Console Log Levels Customizing Console Output with CSS Stack Tracing with console.trace() Assertions for Design-by-Contract Printing Tables for Clearer Data Visualization Copying Objects to the Clipboard Inspecting w … | Continue reading
AI, LLMs, ChatGPT—these are just a few of the buzzwords of the massive revolution unfolding right now. These tools are reshaping how we work, but they come with a catch: while they help us work faster and smarter, we need ... The post Foojay Podcast #62: Better Coding with AI: Fr … | Continue reading
Here is the overview of the JavaFX LinksOfTheMonth of November 2024, published on jfx-central.com during this month. Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via links@jfx-central.com. ... The post JavaFX Links of … | Continue reading
Quartz is often considered the standard job scheduling library in Java, which can lead developers to overlook more modern alternatives. For a long time, Quartz, also known as Quartz Scheduler, was the only viable open-source task scheduler in Java. In ... The post Task Schedulers … | Continue reading
My recent article "Why Java 8 is a Ticking Time Bomb Hiding Within Your Organization" triggered quit some reactions... and so I went a step further and asked on social media: "Why is your company still on Java 8 (or ... The post How Organizations Became Stuck on Outdated Java Ver … | Continue reading
The Evolution Continues. GlassFish, which used to be a popular application server, free to use and reliable, is evolving again. If you’ve been holding onto your old GlassFish instances, there’s good news—things have gotten a lot more exciting recently. Since we ... The post Glass … | Continue reading
Understanding strace and its Origins A Look Back: strace and dtrace Originating from Sun Microsystems Technical Functioning of strace The Role of ptrace in strace Comparing with DTrace Practical Usage and Advantages Ease of Use and Accessibility Favored in Linux ... The post stra … | Continue reading
I’m coming relatively late to the LLM party, but I rarely come very early in the hype cycle. For example, I never bought into blockchain, the solution still searching for problems to solve, nor in microservices, the latest in the ... The post Langchain4J Musings appeared first on … | Continue reading
In July, we published the first part, which included four interviews with Pedro Duque Vieira, Daniel Zimmermann, Christopher Schnick, and Robert Ladstätter. In this part, we have four new interviews for you! Learn more about JavaFX combined with Scala, Swing, ... The post Video s … | Continue reading
TornadoVM is an open-source Java technology that is developed to aid Java programmers in adapting their code bases for hardware acceleration. This blog aims to explain how Java programmers can build TornadoVM with IntelliJ IDEA, and how they can run ... The post Build and Run Tor … | Continue reading
In the world of software development, time is everything. Every developer knows the frustration of waiting for a full application restart just to see a small change take effect. Java developers, in particular, have long dealt with this issue. But ... The post Hot Class Reload in … | Continue reading
Have you fancied to have your own railway display at home? If you love traveling by public transport and always jump on the train just before the door closes like us, it’s really cool and highly efficient to have your ... The post Crafting Your Own Railway Display with Java! appe … | Continue reading
At Devoxx and JFall, we talked with Georgios Diamantopoulos, Lutske de Leeuw, Tom Cools, Jessica Siewert, and Rijo Sam about staying physically and mentally healthy as software developers. There are many topics to handle, like the impact of AI on ... The post Foojay Podcast #61: … | Continue reading
When I spoke to developers at Devoxx in Belgium in October, I was surprised to learn how many of them are maintaining systems that are still running on Java 8 (released in 2014). One of them even still has a ... The post Why Java 8 is a Ticking Time Bomb Hiding Within Your Organi … | Continue reading
In previous weeks, I've analyzed several libraries and frameworks that augment the client with AJAX capabilities. Vue.js Alpine.js HTMX Vaadin In this post, I'll compare them across several axes. Analysis Frontend skills:Remember that I started this series from the point ... The … | Continue reading
Hello to all Java and Spring enthusiasts. I am the Java Template Engine, a fresh newcomer to the Spring Initializer Ecosystem. I have gained popularity as a template engine for developing user interface applications that use Java syntax within Spring ... The post Spring Boot: Jav … | Continue reading
Last week JFall—the "Biggest Java Conference of the Netherlands"—took place. Foojay.io, the Friends of OpenJDK, were there in full force, including a booth with stickers and other swag, as well as Frank Delporte with his popular Foojay.io Podcast, doing live ... The post Foojay.i … | Continue reading
Instant Debugging with the debugger Keyword Triggering Debugging from the Console DOM Breakpoints: Monitoring DOM Changes XHR Breakpoints: Uncovering Hidden Network Calls Simulating Environments for Debugging Debugging Layout and Style Issues Final Word As a Java developer, most … | Continue reading
In today’s production environments, it is not only expected, but critical to keep your technology stack as up to date as possible. Staying current helps to mitigate security risks, while also benefiting from bug fixes, performance improvements, and new features ... The post Effor … | Continue reading
Belgium might be tiny, but we have a strong Java Community! As I was doing interviews at Devoxx in October, I met several of these people, and we talked about their projects, how you can get involved in OpenJDK, and ... The post Foojay Podcast #60: Proud Of Belgium – Devoxx, JobR … | Continue reading