Ever since JRuby 10 upgraded to Java 21, I’ve been re-learning Java with all the excellent language enhancements of the past decade. One of my favorites has to be the instanceof pattern matching features added in Java 16. Today I also reali…
In my previous post, I showed how to use Warbler to package a simple image-processing tool as an executable jar. This post will demonstrate how to “warble” a larger project: the Sidekiq background job server! Sidekiq is one of the most succ…
Warbler is the JRuby ecosystem’s tool for packaging up Ruby apps with all dependencies in a single deployable file. We’ve just released an update, so let’s explore how to use Warbler to create all-in-one packaged Ruby apps! The Java world h…
Java 9 added the ability to mark a @Deprecated annotation with a “since” version, so we figured it was worth updating JRuby. Deprecation is the process of marking a feature as “no longer supported” or “on its way out”, usually in a programm…
At the end of my post on JRuby and JDK 25 startup time features, I teased a bit of the unreleased improvements from Project Leyden. It turns out the latest commits improve startup time even more, so it seems worth posting a quick follow-up!…
JDK 25 is the newest LTS release since JDK 21, and it ships with a gaggle of amazing VM-level features. This post will cover one of the most important improvements for command-line ecosystems like JRuby’s: the AOTCache (ahead-of-time cache)…
After playing with JFreeChart and JRuby and writing up a lovely blog post called “Beautiful Charts with JRuby and JFreeChart” it seems that some folks did not agree with my assessment of the charts as “beautiful” and others did not realize
I recently returned from RubyKaigi where I had the opportunity to sit down with members of the Japanese Ruby community and show them a little bit of JRuby. One of the items that came up a few times was the difficulty of utilizing external l…
I am very excited to introduce you to JRuby 10, our biggest leap forward since “JRuby 9000” was released almost a decade ago. With up-to-date Ruby compatibility, support for modern JVM features, and a big cleanup of internal code and extern…
Hello again friends! Today I’ll show how you can improve JRuby startup right today, as well as a sneak preview of some exciting new developments in this area! I’m still ramping up my blogging efforts, but I wanted to share the results of re…
Hello friends! Today we start a series on improving JRuby startup time using the new OpenJDK Project CRaC (Coordinated Restore at Checkpoint)! If that sounds intriguing, read on! JRuby is the most successful and widely-deployed alternative
Hello friends! I’m re-entering the blogspace with an update on JRuby status and some of the exciting projects we have coming up in the latter half of 2024. Let’s get started! As I posted on the JRuby blog in July, Red Hat’s sponsorship of J…