Phillip Krüger

Introducing Quarkus JSON-RPC: expose your Java methods with one annotation

Mon, 07 Sep 2026 00:00:00 +0000

Quarkus JSON-RPC is a Quarkiverse extension that exposes the public methods of an annotated class over JSON-RPC 2.0, on WebSocket or a Unix domain socket, with streaming, server push and a generated JavaScript client

Keep reading.

Introducing Quarkus Agent MCP: teaching AI agents to speak Quarkus

Thu, 07 May 2026 00:00:00 +0000

Quarkus Agent MCP is a standalone MCP server that lets AI coding agents create, manage, and work effectively with Quarkus applications. Extension authors can ship coding skills that agents pick up automatically

Keep reading.

mvnpm: npm packages as Maven dependencies, without the wait

Mon, 25 Sep 2023 00:00:00 +0000

mvnpm is a Maven repository that sits in front of the npm registry, so any npm package can be used as a Maven or Gradle dependency, kept up to date and synced to Maven Central automatically

Keep reading.

Stylish API

Wed, 04 Nov 2020 00:00:00 +0000

In this blog post we are going to look at the new styling and other new options available in OpenAPI and SwaggerUI Quarkus (v1.10.0 +)

Keep reading.

Experimental GraphQL

Tue, 27 Oct 2020 00:00:00 +0000

This blog post is a follow up on the initial introductory post, Supersonic Subatomic GraphQL, and here we will explore more features, some that is experimental, that we hope to eventually move to the MicroProfile GraphQL Specification (based on your feedback !)

Keep reading.

MicroProfile OpenAPI for everyone

Tue, 18 Aug 2020 00:00:00 +0000

MicroProfile OpenAPI is primarily used for adding OpenAPI to JAX-RS Endpoints. In this blog post we will look at how the SmallRye Implementation extends this with some extra features, and support for more web frameworks, when used in Quarkus

Keep reading.

Supersonic Subatomic GraphQL

Tue, 09 Jun 2020 00:00:00 +0000

MicroProfile GraphQL is now included in the just released version 1.5.0 of Quarkus

Keep reading.

MicroProfile GraphQL introduction

Tue, 25 Feb 2020 00:00:00 +0000

MicroProfile GraphQL has just released it’s first version (1.0). In this blog post we will explore some of the functionalities available in this release

Keep reading.

Proposed namespace for Jakarta EE

Mon, 23 Sep 2019 00:00:00 +0000

Disclaimer: This is my personal opinion and does not represent the view of my employer

Keep reading.

When using JAXB

Thu, 25 Apr 2019 00:00:00 +0000

Not many examples show this, but how you use JAXB in your application can make a huge difference in the performance (and memory usage)

Keep reading.

Some bash functions for git

Tue, 22 Jan 2019 00:00:00 +0000

Here some git related functions in my .bachrc. Is mostly a backup for me, but it might also be useful for someone else

Keep reading.

Swagger UI on MicroProfile OpenAPI

Thu, 23 Aug 2018 00:00:00 +0000

MicroProfile OpenApi gives us a standardized way to describe our JAX-RS API’s using OpenApi 3. If you have used swagger-jaxrs and swagger-annotations before, this will feel very familiar to you as OpenApi is built on the Swagger base

Keep reading.

Reusable MicroProfile Health probes

Mon, 20 Aug 2018 00:00:00 +0000

MicroProfile Health API is a very basic API to report the state of your service, based on one or more Health Probe. It’s very useful in scenarios where some Server or Cluster Controller need to decide if and when your instance should be restarted

Keep reading.

A configurable JAX-RS ExceptionMapper with MicroProfile Config

Mon, 13 Aug 2018 00:00:00 +0000

When you create REST services with JAX-RS, you typically either return nothing (so HTTP 201/2/4 etc) or some data, potentially in JSON format (so HTTP 200), or some Exception / Error (so HTTP 4xx or 5xx)

Keep reading.

Your own MicroProfile Config source

Wed, 08 Aug 2018 00:00:00 +0000

MicroProfile Config, which is part of the MicroProfile Specification, is the standardization for Java Enterprise and Microservices configuration

Keep reading.

GraphQL on Wildfly swarm

Tue, 15 May 2018 00:00:00 +0000

“GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. GraphQL provides a complete and understandable description of the data in your API, gives clients the power to ask for exactly what they need and nothing more, makes it easier to evolve

Keep reading.

Hollowjars, Deployment scanner and why Wildfly swarm is cool

Sun, 24 Dec 2017 00:00:00 +0000

In a previous post I described how you can use OpenLiberty and maven to start the server, either as a standalone, or as part of the maven build, and how to create a fatjar package

Keep reading.

Some factory examples

Wed, 13 Dec 2017 00:00:00 +0000

Every now and then I find myself scratching through some of my old code to find that example “where I did that factory like thing”

Keep reading.

Fatjars, Thinwars and why OpenLiberty is cool

Sun, 12 Nov 2017 00:00:00 +0000

Fatjars

Keep reading.

The Matrix

Thu, 05 Oct 2017 00:00:00 +0000

Java Community Keynote The last day of the conference started, as usual, with the Java Community Keynote. Some of the highlights:

Keep reading.

Bask in positivity

Wed, 04 Oct 2017 00:00:00 +0000

Java EE: Heavyweight or Lightweight, Mythbusters

Keep reading.

Cultivate greatness

Tue, 03 Oct 2017 00:00:00 +0000

Demystifying Microservices for Java EE Developers

Keep reading.

Creativity has no filter

Mon, 02 Oct 2017 00:00:00 +0000

Baking a Java EE 8 Micro Pi

Keep reading.

Live for the code

Sun, 01 Oct 2017 00:00:00 +0000

Meet Apache Netbeans

Keep reading.

The boundary of mankind

Mon, 18 Sep 2017 00:00:00 +0000

So it might not be the official definition of Singularity University, but in my head it’s a showcase of where we are as humans. The boundary of mankind. And it’s mind blowing!

Keep reading.

Continuous Integration to maven central (for free)

Sat, 09 Sep 2017 00:00:00 +0000

If you, like me, have some small open source projects or libraries, that you want to release to maven central, and you do not want to host your own CI environment, then this blog post might help. I mostly wrote it for myself (to remember) but I am sure it

Keep reading.

Apiee: an easy way to get Swagger on Java EE

Mon, 26 Jun 2017 00:00:00 +0000

Swagger is a very popular way to define and describe your REST Services. It’s also the base for the Open API Initiative, the standardization of REST API documentation. I think we can all agree that REST and Swagger will be part of our life for the foreseeable future

Keep reading.

WebSockets example and the birth of Stompee

Wed, 14 Jun 2017 00:00:00 +0000

A while back I decided to play a bit with WebSockets (JSR 356), but I wanted to do more than a “Hello World”, so Stompee was born

Keep reading.

Your own Swagger UI on Liberty

Sat, 28 May 2016 00:00:00 +0000

IBM Websphere Liberty comes with great out of the box support for Swagger, including their own branded Swagger UI. You might, however, want to create your own branded UI. (If you are not using Liberty, check out Apiee for other options)

Keep reading.

Monkey methodology

Thu, 05 May 2016 00:00:00 +0000

The PM becomes a scrum master

Keep reading.

Big blue

Fri, 26 Feb 2016 00:00:00 +0000

Last (half) day of the conference

Keep reading.

Rocket man

Thu, 25 Feb 2016 00:00:00 +0000

The 4th day of the conference was a short one, as the Elton John concert started at 6, all the sessions ended at 5:30ish

Keep reading.

Accidental data

Wed, 24 Feb 2016 00:00:00 +0000

Cultures, Practices and Tools that Support a DevOps Approach: An Open Conversation This panel discussion made up of some industry experts shared some insights into creating a DevOps work environment

Keep reading.

It's cold in the shade

Tue, 23 Feb 2016 00:00:00 +0000

For the morning of day two I spent most of my time in the Open Lab. This is a room with PC’s already setup to “play” with certain tools / technologies. You can help yourself to mini courses and there are people around to answers questions and assist

Keep reading.

Open by design

Mon, 22 Feb 2016 00:00:00 +0000

Day 1 of IBM Interconnect 2016 kicked off with a bang. Back to back sessions from the Research Lab Team and ending with the Open Tech Summit

Keep reading.

Angry Duke

Fri, 30 Oct 2015 00:00:00 +0000

Last day of the conference. Photos are from the Java Community Keynote

Keep reading.

Candle in the wind

Thu, 29 Oct 2015 00:00:00 +0000

Some photos from the Oracle appreciation event. There was a guy there going on about some candle in the wind? That does not sound sustainable, but anyway…

Keep reading.

Sleeping is optional

Wed, 28 Oct 2015 00:00:00 +0000

For the non technical readers, scroll to the pictures for some other interesting info

Keep reading.

Coffee included

Tue, 27 Oct 2015 00:00:00 +0000

Our day started with a free coffee from Duke’s Cafe:

Keep reading.

More than 9 million developers

Mon, 26 Oct 2015 00:00:00 +0000

9 sessions and one party. The first day of the conference was absolutely great !

Keep reading.

29 hours later

Sun, 25 Oct 2015 00:00:00 +0000

Centurion -> JHB International Airport -> Dubai -> San Francisco international Airport -> Hotel

Keep reading.

Guerrilla programming

Tue, 28 Jul 2015 00:00:00 +0000

It’s been one year since I have re-joined the corporate IT industry, where I started my IT career. When you come back to a big corporate after 7 years in a small start-up, you look differently at a lot of things, and you see things that you did not notice

Keep reading.