Tried to give an introduction on the class file API that explains it to anybody working with Java: vimeo.com/1115458585 Courtesy of JavaZone. Thanks for having me.

Wow, TIL that LISTEN/NOTIFY in Postgres requires a global lock when committing transactions issuing a NOTIFY. Consider listening to the WAL via logical replication as an alternative with no impact on the write path. www.recall.ai/blog/postgre...

"Towards a JSON API for the JDK" New proposal on the core-libs-dev list for adding a basic JSON API to #Java. That would be a more than welcome addition, in particular considering the envisioned usage once member patterns will be available. Make it So 🤩! mail.openjdk.org/pipermail/co...

Und das, liebe Kinder, ist der Grund, warum man sich bei existenziell wichtigen Werkzeugen am besten mindestens parallel auf lokal gehostete Open Source Lösungen stützt. Wenn #Trump anfängt, die US-Tech-Konzerne in Waffen zu verwandeln, wird es finster. #KritIs

Here's something I want but am too lazy to build: Take a picture of a huge pile of Lego, and get me a classification of what brick belongs to which set. The manual equivalent is quite something.

We just integrated a performance improvement to Java String that will provide a ~10x performance boost in some applications where Strings are used as keys and where the associated values are constant foldable. This will make JDK 25 faster. github.com/openjdk/jdk/...

Do I understand it correctly that the central-publishing-maven-plugin intends to replace the nexus-staging-maven-plugin? But not necessarily the maven-release-plugin? How would one otherwise handle tagging in Git? I'm confused.

We’d love to see more talk proposals rolling in for #JavaZone2025! Got something interesting to share? Big or small, wild or practical — we want to hear it! 🙌 2025.javazone.no/en/...

My first question on Stack Overflow in four years. Any ideas why Kotlin reflect cannot observe an annotation if a class's "flag" is 6 and not 7? stackoverflow.com/questions/79...

What frustrates me most about Kotlin and Scala is their closed world perspective on their own tooling. Java byte code is well-defined and easy to interop. It should not be hard to add an annotation to a class, but with Kotlin it somehow is: discuss.kotlinlang.org/t/dynamicly-...

All folks who speak at conferences should read this and think long and hard about whether they want to risk speak in the US in the future. Also anyone who works while traveling. comicon.com/2025/03/18/f...

Catch of the day: The Kafka client for Java logs a bunch of things on info level that likely should be debug, which resulted in Splunk logging for millions of crowns of repetitive things nobody needs. I argue that libraries should never log anything on the info level.

@vonderleyen.ec.europa.eu Here’s a potent idea for Europe: allow member states to charge VAT on online ads served within their borders. Why should platforms like Meta earn ad revenue from EU audiences without paying VAT locally?

One of my most radical political positions is that online ads should be treated like addictive substances (alcohol) and have something like 100% VAT. This doesn’t exist because governments can’t technically charge VAT for online ads served in the country.

Finally found the time to make Mockito a proper named module: github.com/mockito/mock... jdk.unsupported can still be used, but if Mockito is added as an agent and the package is not imported elsewhere, it still works fully without it on official API in the instrumentation API.

🎓 We are so happy that our great friend Rafael Winterhalter (@rafaelcodes.bsky.social) will be back to Sofia and will give his talk: "Exploring the Java Class File API"! 🗓️ 14-15 May, 2025 📍 Sofia, Bulgaria 🇧🇬 🎫 Grab your pass: jprime.io/tickets

Dette kan du gjøre for å støtte Ukraina: Trykk på «republiser-knappen» - slik at flest mulig får vite om den politiske markeringen på mandag.

💘 Roses are red, commits turn green, JavaZone’s stage is calling—be seen! 💘 Every bug fix, late-night hack, and production horror story deserves an audience. Your code has a story—share it at #JavaZone2025! 💌 talks.javazone.no/ ℹ️ http#JavaZone2025://2025.javazone.no/en/speaker #JavaZone

So Apple.tv has no Android app, but if you open it in the browser, it automatically routes to /us. This I have to replace with /no manually, otherwise the page crashes loading a language bundle for a popup. Did someone make this page in Dreamweaver? Severance better be a good show.

It took another release to iron out some issues with the Class File API Integration. Also, Byte Buddy now offers improved support for using constantdynamic in instrumentation, with fallback to invokedynamic if not yet available. github.com/raphw/byte-b...

I made a mistake in my changed build and 1.16.1 now offers the actual support for this.

Byte Buddy 1.16.0 now integrates the Java Class File API and is therefore compatible with any future JDK that retains its instruction set, without activating the experimental flag. github.com/raphw/byte-b...

Finally released the first version of my ASM-JDK bridge. It's as close as can be a drop-in replacement for ASM's ClassReader and ClassWriter where the alternative implementations use the JDK class file API in the JDK, and allow for limited forward compatibility. github.com/raphw/asm-jd...

After months of beta testing, I am excited to announce our new product: Sprinters Run GitHub Actions jobs 10x cheaper by changing 1 line in your workflow yml Like I did for Flyway, we focussed on simplicity, security and no-brainer pricing. Check it out: sprinters.sh

I'm looking for a good primer on file system performance in our time. I did the basic CS classes, but I am sure things have changed in the past 20 years. Admittedly, I only looked into network IO since then, so I wonder if someone knows a good sunmary of today's state of the art on files.

A real photo and perfect metaphor heading into 2025.

I made a small Java build tool! With the kids being a bit older, I found some energy again to play with something I had in my head for a few years. This is still very much a POC, but I am happy with the direction it has taken. Have a look and let me know what you think! github.com/raphw/build-...

Maven dependency negotiation is non-intuitive. But I do not think many developers understand the impact of version ranges. I did indeed not. Any version range will override an explicit version. And due to how scopes work, even a transitive test dependency might override production dependencies.

What plugin determines what checksums are calculated and uploaded to Maven Central? I want to have a look, but cannot find any configuration or documentation on this.

Hello, Bluesky!

Java build tools (and their dependency management) have given me a headache as long as I remember. I appreciate that building software is a hard problem and I want to try out some ideas I had around them. To start, I wrote a standalone POM-to-dependency converter (gist.github.com/raphw/78b0d5...)

What's the point of storing checksums on Maven Central alongside the artifacts? If you download a corrupted artifact from a corrupted server, computing a correct checksum of the corrupted artifact, and storing it along, is the easy part. And TCP already checks for lost packages (and retries).

It's tragic that the POM file has emerged as the standard way of representing a published Java artifact's transitive dependencies. POMs are a mess to parse and it's almost impossible to end up with the same result as Maven. The ecosystem should strive towards a better standard.

I am partially grateful for Twitter becoming the hellscape it now is, as it somewhat cured me from looking at my phone too much. But I always missed it as a channel for what is happening in technology, so I will give this one another try.