Java Development

3 Ways to Track When the Next Valhalla Build Drops

Eagerly awaiting Project Valhalla? Discover 3 practical ways to track the latest early-access builds, from official OpenJDK sources to automated alerts.

D

Daniel Petrova

A senior JVM engineer and performance enthusiast passionate about the future of Java.

7 min read23 views

If you're a Java developer with an eye on the future, you've undoubtedly heard the whispers—or maybe the enthusiastic shouts—about Project Valhalla. This ambitious OpenJDK project promises to fundamentally reshape how we work with data in Java, introducing value types, inline classes, and primitive classes. The goal? To give us the performance of primitive data types with the flexibility and expressiveness of classes. It’s the kind of evolution that could dramatically improve the performance of everything from massive data-processing pipelines to everyday business applications.

The excitement is palpable, but Valhalla is a marathon, not a sprint. It’s being delivered through a series of early-access builds, each one a stepping stone towards its final integration into the JDK. For developers who want to experiment, provide feedback, and prepare their codebases for this new paradigm, getting your hands on these builds as soon as they drop is crucial. The question is, how do you stay on top of these releases without constantly refreshing a dozen web pages?

Don't worry, we've got you covered. Here are three effective strategies, ranging from simple and official to automated and tech-savvy, to ensure you're among the first to know when the next Valhalla build is ready for download.

Method 1: Go Straight to the Source (The OpenJDK Project)

When it comes to reliable, first-party information, nothing beats going directly to the OpenJDK project itself. The Valhalla team maintains several official channels that serve as the ground truth for all project developments. This is the most direct and accurate way to get your information.

The Valhalla Project Wiki: Your Central Hub

The official Project Valhalla Wiki is the definitive source of information. It's the project's homepage, containing everything from high-level goals to detailed design documents. Most importantly for us, it has a dedicated section for early-access builds. Bookmark this page and check it periodically. The maintainers update it with links to the latest builds and corresponding release notes.

  • What to look for: A section often titled "Early-Access Builds" or similar. This will contain direct links to the build repository.
  • Pros: 100% accurate, official information.
  • Cons: Requires you to manually check the page.

The Valhalla-Dev Mailing List: Eavesdrop on the Experts

For those who want to be truly in the know, the valhalla-dev mailing list is indispensable. This is where the architects and engineers behind Valhalla—including luminaries like Brian Goetz—discuss design decisions, review proposals, and announce new builds. When a new build is published, an announcement is almost always posted here first.

A word of caution: this is a high-volume, highly technical mailing list. You’ll see deep-dive discussions about JVM internals and language semantics. If you're only interested in build announcements, you can set up a filter in your email client for subjects containing keywords like "[ANN]" or "Early-Access Build".

  • How to join: Visit the link above and subscribe with your email address.
  • Pros: The absolute earliest notification, often with context from the developers themselves.
  • Cons: Can be very noisy with technical discussions if you don't use filters.
Advertisement

jdk.java.net: The Official Build Repository

Ultimately, all early-access builds are hosted on jdk.java.net. This site provides the actual binary downloads for various platforms (Linux, macOS, Windows). While the wiki and mailing list will link here, you can also bookmark this page directly. The build strings are versioned (e.g., `build 22-valhalla+2-71`), so you can easily see when a new one has been uploaded.

  • What to look for: The latest build number at the top of the page.
  • Pros: Direct access to the download links.
  • Cons: No context or announcement; you only know a new build is out if you remember the old build number.

Method 2: Tap into the Community Grapevine

If you prefer your news curated and accompanied by community discussion, turning to social media and news aggregators is a fantastic strategy. You might not be the very first to know, but you'll hear about it within hours, and you'll get the added benefit of seeing how the community is reacting.

Social Media: Following the Right People

Many of the key figures in the Java world are active on platforms like X (formerly Twitter). Following them is a great way to get timely updates. When a new Valhalla build drops, it's a safe bet that someone from the Java Platform Group at Oracle or a prominent Java Champion will post about it.

  • Who to follow: Start with Brian Goetz, Ron Pressler, and the official @OpenJDK account. Creating a Twitter List for "Java Experts" can help you keep these updates organized.
  • Hashtags to monitor: Keep an eye on #ProjectValhalla and #Java.
  • Pros: Updates delivered directly to your feed, often with helpful commentary.
  • Cons: Relies on the whims of the algorithm and who you follow.

Forums and News Aggregators: Where the Discussion Happens

When a build is released, the news quickly spreads to community hubs. These are the best places to not only learn about the drop but also to see what others are discovering, what bugs they're hitting, and what cool experiments they're trying.

  • Reddit: The r/java subreddit is a must-read. A link to the new build will almost certainly be posted and upvoted here within hours of its release.
  • Java Newsletters: Subscribing to newsletters like Java Weekly or sites like InfoQ Java and Foojay.io is a great way to get a summary of important happenings, including major Valhalla updates.

Method 3: Set Up Your Own Automated Watchdog

For those who love automation and want a notification system tailored to their needs, why not build your own? This approach requires a little more technical setup but offers a "set it and forget it" solution.

Old School Cool: RSS Feeds

The mailing list, in particular, can be consumed via an RSS feed. Many mailman archives offer this feature. By adding the valhalla-dev mailing list's feed to an RSS reader like Feedly or The Old Reader, you can get a clean, chronological view of all communications without cluttering your inbox. You can then scan the titles for release announcements.

The Power User's Choice: Custom Scripts and GitHub Actions

This is the ultimate solution for the proactive developer. You can write a simple script that periodically checks the jdk.java.net/valhalla page for changes and sends you a notification.

Here’s a conceptual bash script that you could run as a cron job:

#!/bin/bash

URL="https://jdk.java.net/valhalla/"
LAST_BUILD_FILE="/path/to/your/last_build.txt"

# Fetch the latest build string from the webpage
# This selector might need updating if the site structure changes
CURRENT_BUILD=$(curl -s $URL | grep -o 'build [0-9]*-valhalla+[^<]*' | head -n 1)

if [ -f "$LAST_BUILD_FILE" ]; then
    LAST_BUILD=$(cat "$LAST_BUILD_FILE")
    if [ "$CURRENT_BUILD" != "$LAST_BUILD" ]; then
        echo "New Valhalla build dropped: $CURRENT_BUILD"
        # Add your notification command here (e.g., send an email or a Slack message)
        echo "$CURRENT_BUILD" > "$LAST_BUILD_FILE"
    fi
else
    echo "Initializing with current build: $CURRENT_BUILD"
    echo "$CURRENT_BUILD" > "$LAST_BUILD_FILE"
fi

You can take this a step further by setting it up as a GitHub Action in a private repository, which can run on a schedule (e.g., every 6 hours) and use a tool like `ntfy` or a Slack webhook to send you a push notification. It's a fun mini-project that gives you a personal, highly reliable alert system.

Which Method is Right for You?

To help you decide, here’s a quick comparison of the three approaches:

Method Reliability Timeliness Effort to Set Up Best For...
1. Official Sources Highest Highest (Mailing List) Low Developers who want the absolute ground truth without any noise.
2. Community Grapevine High Medium (hours lag) Low Developers who value discussion and context alongside the announcement.
3. Automated Watchdog Highest High Medium to High Power users and automation enthusiasts who want a personalized alert system.

Getting Ready for the Future of Java

Project Valhalla is one of the most significant undertakings in the recent history of the Java platform. By tracking its progress and experimenting with early-access builds, you're not just satisfying your curiosity—you're participating in the evolution of the language. The feedback from the community is vital for hardening these features and ensuring they meet the real-world needs of developers.

Whether you choose to follow the official sources, listen to the community, or build your own automated notifier, staying informed is the first step. So pick a method that suits your style, download the next build when it drops, and start exploring the future of Java, today.

Tags

You May Also Like