I've merged changes into master (to be 1.3 soon) that should make Nailgun easier to use. And 1.3 will be the first release to include all NG stuff in the binary dist.
jruby --ng-server starts up a server. You can manage it however you likejruby --ng uses the Nailgun client...

In the spirit of Nick Sieger's short statement on the recent uproar over Matt Aimonetti's "pr0n star" talk, I'm posting my one and only blog response to the whole thing.
Unlike Nick, I too often have used this blog as a soapbox. And too often I've ground my personal axe...

I figured I'd give Typo a try on JRuby today. It has been working for quite a while, but with the GlassFish gem improving so much I thought it would be good to write up an updated walkthrough. It's pretty simple.
BTW, is Typo still the preeminent blog package for...

It occurred to me today that a lot of people probably want a JRuby deployment option that works with a front-end web server. I present for you the trivial steps required to host a JRuby server behind Apache.
Update: It's worth mentioning that this works fine with JRuby + Mongrel...

There's been a lot of supposition about the future lately, and I've certainly read and succumbed to the temptation of the prognosticator. I'm not going to comment on any of the players or put forward my own suppositions about what might happen. What I will do here is talk about...

We have successfully migrated JRuby development to Git!
The main repository is on the JRuby kenai.com project, but most folks will just want to clone the official mirror on Github. The mirror lags by no more than five minutes, and we'll eliminate that lag soon...

At least once a year there's a maelstrom of posts about a new Ruby implementation with stellar numbers. These numbers are usually based on very early experimental code, and they are rarely accompanied by information on compatibility. And of course we love to see crazy performance numbers, so many of...

Sigh. It must be that time of year again. Another partially-completed Ruby implementation has started to get overhyped because of early performance numbers.
MacRuby has been mentioned on this blog before. It's a reimplementation of Ruby 1.9 targeting the Objective-C runtime--and now, targeting LLVM for immediately compiling Ruby code to...

I have finally released the first version of BiteScript, my little DSL for generating JVM bytecode. Install it as a gem with "gem install bitescript".
require 'bitescript'...

I did another pass on compiler2, and managed to wire in signature support. So let's look at a couple examples:
class MyRubyClass def helloWorld puts "Hello from Ruby" end def goodbyeWorld(a) puts a end...

"Compiler #2" as it has been affectionately called is a compiler to turn normal Ruby classes into Java classes, so they can be constructed and called by normal Java code. When I asked for 1.3 priorities, this came out way at the top. Tom thought perhaps I asked for trouble...

With JRuby 1.2 almost out the door, I want to talk a bit about where we should go with JRuby 1.3. There's always more work to do, but in this case there's a few different directions we could probably go.
Some obvious items will continue to see work:1.9 libraries, interp,...

A number of folks have asked us over the years whether JRuby could run on a Java ME-enabled device. I've always said I believed it would be possible with enough trimming. Strip out all the libraries that ME doesn't support, and you should be left with a runnable "core" of...

Ok, so I intentionally made my last post a bit of a "tease". You can't fault me for trying to drum up a little buzz, yeah? And hey, I spent almost as long fiddling with that logo as I did hacking JRuby to run on Android. Here it is again,...

# cat test.rb
require 'java'import java.lang.System...

We get a lot of bug reports on the JRuby project. No, it's not because JRuby's a buggy POS. It's because we're implementing the core of an entire platform. It's hard.
Over the past year or so we kinda let the bug tracker go a little wild. We've never had...

I just love the JRuby version string. I love it so much, I'm microblogging what each piece means.
jruby 1.2.0 (ruby 1.8.6 patchlevel 287) (2009-01-29 rev 8947+3) [x86_64-java]Obviously "jruby 1.2.0" is the name of the impl and the version number. We'll probably modify this to suffix "-dev" on trunk."ruby 1.8.6...

I probably start up a JVM a thousand times a day. Test runs, benchmark runs, bug confirmation, API exploration, or running actual apps. And in many of these runs, I use various JVM switches to tweak performance or investigate runtime metrics. Here's a short list of my favorite JVM switches...

I've been a bit quiet on the blog over the past couple months, and for that I apologize. JRuby is moving very quickly now, and we'll have some pretty big announcements soon. For now, I figured I'd let my friends in Europe and the British Isles know I'll be in...

It's that time of year again, and the call for papers for JavaOne and CommunityOne is closing soon! We're hoping for a lot more diverse JRuby presentations and speakers this year, so don't think you have to be doing Rails to get in. There's room for GUI dev, Game dev,...