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Missed RubyConf? Attend Qcon's Ruby Track!

Posted 26 days ago by hea...@headius.com (Charles Oliver Nutter)

This year, RubyConf reportedly reduced their attendee cap to 250 people, after hosting a 500 to 600-person conference last year. As you can imagine, this meant a lot of people that wanted to attend were not able to get tickets. To complicate matters ... [More] , the RubyConf registration site happened to go live during the middle of the night EU time, and by the time most Europeans woke up it was already sold out. What's a Rubyist to do?

Well there's another option. Working with Ryan Slobojan of InfoQ and the organizers of Qcon San Francisco, I'll be hosting a one-day Ruby track the day before RubyConf! Qcon's main conference runs Wednesday through Friday, with my track on Wednesday, November 18th.

And now the REALLY good news! Because we wanted this to be a fallback for folks that could not attend RubyConf, we realized that the full conference fee was simply too high (ranging from $1500 up). So to make it possible for people to attend just the one day Ruby track, you can register with the code "rubywednesday" to get a drastically reduced $350 one-day conference pass. Yes Virginia, there is a Santa Claus!

Those of you attending RubyConf are also welcome to attend this one-day track as well; most of the presentations won't overlap. Here's the lineup, including a special opening presentation by Yukihiro Matsumoto himself!

10:20 - "The Many Facets of Ruby" track opening by me
Ruby has seen a dramatic growth in popularity over the last few years, and there are now many facets to the Ruby story - multiple implementations, game-changing web frameworks, and large-scale use in enterprise solutions. Join us as we explore many aspects of Ruby in today's world.
10:30 - "Why we love Ruby?" by Yukihiro Matsumoto
Why we love Ruby? I have asked myself this question repeatedly. In this presentation, I will disclose my answer as of 2009. The keyword is QWAN.
11:45 - "Basking in the Limelight" by Paul Pagel
Limelight is Ruby on the desktop. Build applications with multiple windows, or just one window. Take control of the desktop, or play nicely with the desktop. Create fun animated games, or productive business apps. Develop rich internet applications, or unwired apps to make you rich. Publish your apps on the internet, or keep them for you and your friends. Do all this, writing nothing but Ruby code, in Limelight.
13:45 - "You've Got Java in my Ruby" by Thomas Enebo
JRuby is now well-established as a popular alternative implementation of Ruby.But why would you want to use it? How can it help you? This talk will detail some of the more interesting differences and advantages of using JRuby. Expect to get a better understanding of how Java makes a faster and more stable Ruby as well as how you can leverage Java features as an extra set of tools for your project.
15:00 - "Rails 3" by Yehuda Katz
I don't have a full abstract for this, but it's what you might expect...an overview of why Rails 3 is really "growing up" the framework, making it more clearly componentized and easier to adapt to more complicated (dare I say "enterprise") applications in the future. In working with Yehuda I know he's also paid special attention to performance.. Rails 3 is going to be excellent.
16:30 - "Rails in the Large: How Agility Allows Us to Build One of the World's Biggest Rails Apps" by Neal Ford
While others have been debating whether Rails can scale to enterprise levels, we've been demonstrating it. ThoughtWorks is running one of the largest Rails projects in the world, for an Enterprise. This session discusses tactics, techniques, best practices, and other things we've learned from scaling rails development. I discuss infrastructure, testing, messaging, optimization, performance, and the results of lots of lessons learned, including killer rock-scissors-paper tricks to help you avoid babysitting the view tests!

I think it's going to an outstanding track, and I'd probably pay the $350 just to see Matz speak if I knew I wouldn't get another chance for a long time. Limelight looks like an outstanding way to build rich client apps using JRuby, and of course you know I like JRuby. Tom will show some of the latest advancements we've done in JRuby, including the ability to produce "real" Java classes at runtime for integrating with Java frameworks better. Rails 3 I've described above, but you really have to see Yehuda present it himself. And of course everyone would like to know how to scale Rails to the moon...Neal knows his stuff.

Here's the track page: The Many Facets of Ruby

And the registration page (don't forget to use code "rubywednesday").

I really hope to see you all there, so you can get your Ruby conference fix this fall. Tell your friends and let me know if you have any questions! [Less]

Announcing JRubyConf 2009

Posted 3 months ago by hea...@headius.com (Charles Oliver Nutter)

Good news everybody! We're finally going to have JRubyConf!

After over 3 years of heavy development, dozens of deployments and hundreds of users, it's time for a conference for JRuby users. We've talked about it on the JRuby mailing lists ... [More] , polled users, and seen other JRubyists do the same. And the chorus slowly grew: you all wanted JRubyConf more and more.

Now, thanks to Engine Yard, who's producing the conference, and to sponsors EdgeCase and ThoughtWorks, we'll host the first ever JRubyConf the day after RubyConf, on Sunday November 22nd. This should allow folks attending RubyConf to also attend JRubyConf and not have to schedule a separate trip.

So here's the details:
What: JRubyConf 2009 (the first ever!)
When: Sunday, November 22nd; the day after RubyConf 2009
Where: Same hotel as RubyConf, the Embassy Suites at San Francisco Airport. You don't even have to switch locations!
Why: Because we love you!
Price: FREE!!!
We've been putting together a wide range of talks and speakers, from the JRuby core team members to real-world users; from the latest on deploying Rails to gaming and desktop development. It's going to be a fast-paced event with something for everyone, and best of all, it's FREE!

Space is limited for the event, and you will have to register separately from RubyConf to secure your seat (but you don't have to go to RubyConf to attend JRubyConf!). Check out www.jrubyconf.com for information, registration, and so on, and be quick about it!

See you at JRubyConf 2009! [Less]

Introducing Surinx

Posted 3 months ago by hea...@headius.com (Charles Oliver Nutter)

In June of this year, I spent a few hours formulating a dynamic cousin to Duby. Duby, if you don't remember, is a static-typed language with Ruby's syntax and Java's type system. Duby supports all Ruby's literals, uses local type inference (only ... [More] argument types *must* be declared), and runs as fast as Java (because it produces nearly identical bytecode). But with the advent of invokedynamic, Duby needed a playmate.
Enter "Juby". Juby is intended to be basically like Duby, in that it uses Java's types and Ruby's syntax. But it takes advantage of the new invokedynamic opcode to be 100% dynamic. Juby is a dynamic Duby, or perhaps a dynamic Java with Ruby syntax. It's not hard to comprehend.
But the name was a problem. Juby sounds like "Jewbie", a pejorative term for a Jewish person. So I sent out a call for names to the Twitterverse, ultimately ending up with far more names than I could choose from.
The name I have chosen, Surinx, has a simple story attached. You see, when James Gosling created Java, he originally named it "Oak", after the tree outside his window. So I followed his lead; the tree (a bush, really) outside my window is a lilac, Syringa vulgaris. The genus "Syringa" is derived from New Latin, based on a Greek word "surinx" meaning "shepherd's pipe" from the use of the Syringa plant's hollow stems to make pipes. Perhaps Surinx is building on the "hollow stem" of the JVM to produce something you can smoke (other dynamic languages) with. Combined with its cousin "Duby", we have quite a pair.
And in other news, the simple Surinx implementation of "fib" below (identical to Ruby) manages to run fib(40) in only 7 seconds on current MLVM (OpenJDK7 + invokedynamic and other tidbits), a five-fold improvement over JRuby's fastest mode (jruby --fast).
def fib(a)
if a < 2
a
else
fib(a - 1) + fib(a - 2)
end
end
Given that JRuby has started to support invokedynamic, the solid performance of Surinx bodes very well for JRuby's future.

Please welcome Surinx to your language repertoire! [Less]

Which Deployment for JRuby on Rails?

Posted 4 months ago by hea...@headius.com (Charles Oliver Nutter)

We often get the question "which deployment option is the best for JRuby on Rails?" The truth is that it depends on what you need out of deployment.
If you have a fairly straightforward Rails app without a lot of service dependencies and a ... [More] greenfield deployment target, your best bet is probably the GlassFish gem right now. It performs really well, can handle high loads and high concurrency, and automatically detects Rails' threadsafe mode, scaling better when it's turned on. I'm no longer a Sun employee, and I still think the GF gem is an outstanding piece of work. Here's my howto on GF gem + JRuby on Rails + Apache. Update: Here's information on using Capistrano with the GlassFish gem.
If you have an existing Java EE or web container like Tomcat, JBoss, GlassFish, WebLogic, or WebSphere, you want to look into Warbler. Warbler packages your application as a .war file, suitable for deployment on any of these standard servers. The Warbler wiki is the best place to learn about deploying with Warbler.
If you're looking for something that's somewhat greenfield but also needs more advanced services like scheduled asynchronous jobs, web services, and some level of EE integration, you should look at JBoss's TorqueBox, a customized JBoss specially tailored for deployment of Rack-based apps (like Rails) on JRuby.
If you're looking for a hosting provider that can take your app and make it "just work", then you should look into Engine Yard's JRuby cloud offering. We don't yet have it 100% ready to go, but it won't be long and it will be fantastic. For now you can give us some direction and input on what that hosting/cloud should look like.
All told, there's a lot of great options for JRuby deployment, and no one of them is going to be perfect for everyone. Choose wisely, and join the JRuby mailing lists if you have questions. [Less]

Return of Ruboto!

Posted 4 months ago by hea...@headius.com (Charles Oliver Nutter)

It's been a while since I was able to work on JRuby's Android support, but tonight I managed to finally circle back. And I've got something much more impressive working today: a real IRB application!

(And yes, this works just fine on the ... [More] phone too)

It turned out to be incredibly easy to get this working. I'm not using any stinking plugin because they all seemed to just get in my way. So I generated a dummy application using the "android" tool, dropped the jruby jar in "libs", wrote up a quick interactive console, built and signed it, and that's all there was to it.

JRuby turns out to work very well for this sort of thing because we have an interpreter, so we can parse and execute code dynamically. Hooray for interpreted support!

I had to tweak a couple things to work around shortcomings in Android:
I had to edit the dx tool to allow up to a 1024M heap, since JRuby's jar has a ton of stuff in itI had to catch and swallow an ArrayIndexOutOfBounds exception coming out of Dalvik's enum support. Bug!This is of course a proof-of-concept. Writing full applications in Ruby isn't far behind, but we'll need a couple adjustments to JRuby to support it well:
Ability to run 100% precompiled with no runtime code generationStrip out parser, interpreter, compiler, and bytecode-generation bits to shrink the jarTidy up the AOT compiler and wire it into the app build processGenerate some Ruby stub logic for the Android APIs, so they'll work well from RubyStrip down the weirder and wilder Ruby features (eval, etc) to allow fastest-possible executionI know how to do all of this.

I've pushed ruboto-irb to Github so you can check it out and play with it. I welcome contributors :)

Ruboto lives!
Update: Good news, everyone!
First, the two bugs I've encountered have both been previously reported and are due to be fixed in an upcoming Android release. They are the enum bug and the reflection bug.
Second, someone going by the handle of "Psycho" reports in the comments that the next version of the Android Scripting Environment (ASE) will include JRuby support! Of course I'm interested in more than just scripting applications with JRuby...I'd like to be able to write applications using only Ruby code, so I'll continue working on this. But JRuby support seems to be coming in from all directions. [Less]

JVM Language Summit Call for Participation

Posted 4 months ago by hea...@headius.com (Charles Oliver Nutter)

I should have blogged this sooner, but things have been a little...crazy...lately.
The JVM Languages Summit is coming up for its second year. The event last year was spectacular; representatives of all the major languages and several minor ones ... [More] showed up and talked about their plans, their history, and their desires from the JVM. And JVM engineers from the three major vendors (Sun, IBM, Oracle) sat there and dutifully took notes. It was a great meeting of minds, and an incredibly uplifting event for those of us invested in the JVM.
It's also not just an event for implementers; if you're keen on the nitty-gritty details of JVM languages and want to help improve them, promote them, or otherwise relate to them in some way, you should be here.
Hope to see you at the Summit!

=== CALL FOR PARTICIPATION -- JVM LANGUAGE SUMMIT, September 2009 ===

http://jvmlangsummit.com/

Dear colleague;

We are pleased to announce the the 2009 JVM Language Summit to be held at Sun's Santa Clara campus on September 16-18, 2009. Registration is now open for speaker submissions (presentations and workshops) and general attendance.

The JVM Language Summit is an open technical collaboration among language designers, compiler writers, tool builders, runtime engineers, and VM architects. We will share our experiences as creators of programming languages for the JVM and of the JVM itself. We also welcome non-JVM developers on similar technologies to attend or speak on their runtime, VM, or language of choice.

The format this year will be slightly different from last year. Attendees told us that the most successful interactions came from small discussion groups rather than prepared lectures, so we've divided the schedule equally between traditional presentations (we're limiting most presentations to 30 minutes this year) and "Workshops". Workshops are informal, facilitated discussion groups among smaller, self-selected participants, and should enable "deeper dives" into the subject matter. There will also be impromptu "lightning talks".

We encourage speakers to submit both a presentation and a workshop; we will arrange to schedule the presentation before the workshop, so that the presentation can spark people's interest and the workshop will allow those who are really interested to go deeper into the subject area. Workshop facilitators may, but are not expected to, prepare presentation materials, but they should come prepared to guide a deep technical discussion.

The Summit is being organized by the JVM Engineering team; no managers or marketers involved! So bring your slide rules and be prepared for some seriously geeky discussions.

The registration page is now open at:

http://registration.jvmlangsummit.com/

If you have any questions, send inquiries to inquire@jvmlangsummit.com.

We hope to see you in September! [Less]

JRuby's Importance to Ruby, and eRubyCon 2009

Posted 4 months ago by hea...@headius.com (Charles Oliver Nutter)

I'm going to be speaking about JRuby again this year at eRubyCon, in Columbus OH. I just got back from Rails Underground, which reminded me how much I love the smaller regional Ruby conferences. So I'm totally pumped to go to eRubyCon this ... [More] year.
The idea of "Enterprise Ruby" has become less repellant since Dave Thomas's infamous keynote at RalsConf 2006. There are a lot of large, lumbering organizations out there that have yet to adopt any of the newer agile language/framework combinations, and Rails has most definitely led the way. I personally believe that in order for Ruby to become more than just a nice language with a great community, it needs to gain adoption in those organizations, and it needs to do it damn quickly. JRuby is by far the best way for that to happen.
There's another aspect to adoption I think has escaped a lot of Rubyists. In 2006 and 2007, Ruby gained a lot of Java developers who were running away from bloated, over-complicated frameworks and the verbosity and inelegance of Java. When I asked at Ruby conferences in 2005, 2006, and 2007 how many people had done Java development in a former life, almost everyone in the room raised their hands. When I've asked the same question in 2008 and 2009, it's down to less than half the room. Where did they go?
The truth is that the Java platform now has reasonably good answers to Ruby in Groovy, Scala, and Clojure, and reasonably good answers to Rails in Grails and Lift. And yet many Rubyists don't realize how important it is for JRuby to continue doing well, many still seeing it as simply "nice to have" while dismissing the entirety of the Java platform as unimportant to Ruby's future. It's an absurd position, but I blame myself for not making this case sooner.
I believe that JRuby is the most crucial technology for Ruby's future right now. Regardless of how fast or how solid the C or C++ based Ruby implementations get, the vast majority of large organizations are *never* going to run them. That's the truth. If we can leverage JRuby to grab 1-2% of the Java market, we'll *double* the size of the Ruby community. If we completely lose the Java platform to alternatives, Rubyists may not have the luxury of remaining Rubyists in the future. It's that big a deal.
So I hope you'll come by eRubyCon and hear what we've been working on in JRuby and what we have planned for the future, especially our work on making JRuby a stronger JVM citizen. I'm certain to expand on the Hibernate-based prototype code I showed at Rails Underground, and hope to have some additional, never-before-seen demonstrations that will shock and amaze you. And if there's time, I'll demonstrate my two research pets, the "Ruby Mutant" twins Duby and Juby.
See you there! [Less]

Blog has moved....

Posted 5 months ago

I am moving my blog to http://blog.enebo.com/

I should even update it more often that this one...

Your JavaOne 2009 Ruby Guide

Posted 6 months ago by charles...@sun.com (Charles Oliver Nutter)

Here's a list of talks about Ruby or that mention/relate to Ruby at CommunityOne and JavaOne 2009. Some of these are about other languages, since I just did a dumb search for any mention of "ruby".
Add your suggestions in comments to help narrow ... [More] down which talks people should go see.

CommunityOne:
S304128

Developing on the OpenSolaris™Operating System

David Miner, Sun Microsystems; Nicholas Solter, Sun Microsystems

Monday

June 01

10:50 AM - 11:40 AM

Esplanade 305

S307894

Sun GlassFish™ Portfolio: Where Sun's Application Platform Is Going

Eduardo Pelegri-Llopart, Sun Microsystems, Inc.

Monday

June 01

10:50 AM - 11:40 AM

Hall E 135

S304001

Pragmatic Identity 2.0: Invoking Identity Services with a Simplified REST/ROA Architecture

Pat Patterson, Sun Microsystems, Inc.; Daniel Raskin, Sun Microsystems, Inc.; Ron Ten-Hove, Sun Microsystems, Inc.

Monday

June 01

11:50 AM - 12:40 PM

Gateway 102-103

S304141

Programming Languages and the Cloud

Ted Leung, Sun Microsystems, Inc.

Monday

June 01

11:50 AM - 12:40 PM

Gateway 104

S304267

Beyond Impossible: How JRuby Has Evolved the Java™ Platform

Charles Nutter, Sun Microsystems, Inc.

Monday

June 01

1:40 PM - 2:30 PM

Hall E 134

S304040

Social-Enable Your Web Apps with OpenSocial

Dave Johnson, IBM

Monday

June 01

4:00 PM - 4:50 PM

Esplanade 300

S311290

JRuby Rails Workshop

Arun Gupta, Sun Microsystems, Inc.; Jacob Kessler, Sun Microsystems; Vivek Pandey, Sun Microsystems, Inc.; Nick Sieger, Sun Microsystems, Inc

Tuesday

June 02

9:00 AM - 5:00 PM

Breakout Room 7

S311294

Cloud Computing and Storage in Practice

Tim Bray, Sun Microsystems, Inc.; Chris Kutler, Sun Microsystems, Inc.

Wednesday

June 03

1:30 PM - 5:00 PM

Breakout Room 2

JavaOne:

PAN-5348Script Bowl 2009: A Scripting Languages ShootoutPanel SessionRoberto Chinnici, Sun Microsystems, Inc.; Thomas Enebo, Sun Microsystems, Inc. ; Rich Hickey, Clojure;Guillaume Laforge, SpringSource; Raghavan Srinivas, Self; Dick Wall , Google; Frank Wierzbicki, Sun Microsystems, Inc.Tuesday
June 02
10:50 AM - 11:50 AMGateway 104TS-4164Clojure: Dynamic Functional Programming for the JVM™ MachineTechnical SessionRich Hickey, ClojureTuesday
June 02
12:10 PM - 1:10 PMHall E 133TS-4487The Feel of ScalaTechnical SessionBill Venners, Artima, Inc.Tuesday
June 02
3:20 PM - 4:20 PMGateway 104TS-5015Welcome to RubyTechnical SessionYehuda Katz, Engine YardTuesday
June 02
4:40 PM - 5:40 PMGateway 104TS-5216Toward a Renaissance VMTechnical SessionBrian Goetz, Sun Microsystems, Inc.; John Rose, Sun MicrosystemsTuesday
June 02
6:00 PM - 7:00 PMHall E 133BOF-4434Hacking JRubyBOFOla Bini, ThoughtWorksTuesday
June 02
8:30 PM - 9:20 PMGateway 104BOF-5058JRuby Experiences in the Real WorldBOFLogan Barnett, Happy Camper Studios; David Koontz, JumpBoxTuesday
June 02
9:30 PM - 10:20 PMGateway 104TS-5413JRuby on Rails in Production: Lessons Learned from Operating a Live, Real-World SiteTechnical SessionNick Sieger, Sun Microsystems, IncWednesday
June 03
11:05 AM - 12:05 PMGateway 104TS-4921Dynamic Languages Powered by GlassFish™ Application Server v3Technical SessionJacob Kessler, Sun Microsystems; Vivek Pandey, Sun Microsystems, Inc.Wednesday
June 03
11:05 AM - 12:05 PMHall E 133TS-4955Comparing Groovy and JRubyTechnical SessionNeal Ford, ThoughtWorks Inc.Wednesday
June 03
2:50 PM - 3:50 PMGateway 104BOF-4682Performance Comparisons of Dynamic Languages on the Java™ Virtual MachineBOFMichael Galpin, eBayWednesday
June 03
6:45 PM - 7:35 PMEsplanade 300TS-5385Alternative Languages on the JVM™ MachineTechnical SessionCliff Click, Azul SystemsThursday
June 04
9:30 AM - 10:30 AMGateway 104TS-4012Pragmatic Identity 2.0: Simple, Open, Identity Services Using RESTTechnical SessionPat Patterson, Sun Microsystems, Inc.; Ron Ten-Hove, Sun Microsystems, Inc.Thursday
June 04
10:50 AM - 11:50 AMEsplanade 307-310TS-4961"Design Patterns" for Dynamic Languages on the JVM™ MachineTechnical SessionNeal Ford, ThoughtWorks Inc.Thursday
June 04
10:50 AM - 11:50 AMGateway 104TS-5354Exploiting Concurrency with Dynamic LanguagesTechnical SessionTobias Ivarsson, Neo TechnologyThursday
June 04
1:30 PM - 2:30 PMGateway 104TS-5033Scripting Java™ Technology with JRubyTechnical SessionThomas Enebo, Sun Microsystems, Inc. ; Charles Nutter, Sun Microsystems, Inc.Thursday
June 04
2:50 PM - 3:50 PMGateway 104TS-3955Monkeybars: Tools-Enabled Swing Development with JRubyTechnical SessionLogan Barnett, Happy Camper Studios; David Koontz, JumpBoxFriday
June 05
12:10 PM - 1:10 PMEsplanade 302 [Less]

BiteScript 0.0.2 Scripting Examples

Posted 7 months ago by charles...@sun.com (Charles Oliver Nutter)

I just released BiteScript 0.0.2, which mainly fixes some issues defining packages and non-public classes.

BiteScript is basically just a simple DSL for generating JVM bytecode. I use it in Duby and now in the "ruby2java" compiler we'll be ... [More] using to turn Ruby classes into Java classes.

I've blogged about BiteScript here before, but I realized today I never posted any simple "hello world" examples. So here's a few of them, all using the command-line "scripting" mode.

First, the simplest version:
main do
ldc "Hello, world!"
aprintln
returnvoid
end
Obviously this is using a predefined "aprintln" macro, since there's no "aprintln" opcode on the JVM. Here's a longer version that shows how a macro would be defined, and accepts one argument
import java.lang.System
import java.io.PrintStream

macro :aprintln do
getstatic System, :out, PrintStream
swap
invokevirtual PrintStream, println, [Object]
end

macro :aprint do
getstatic System, :out, PrintStream
swap
invokevirtual PrintStream, print, [Object]
end

main do
ldc "Hello, "
aprint
aload 0
aaload 0
aprintln
returnvoid
end
And of course this is just Ruby code, so you can just use Ruby to alter the generation of code:
main do
5.times do
ldc "Wow!"
aprintln
end
returnvoid
end
These "BiteScripts" can all be either run with the "bite" command or compiled with the "bitec" command:
$ bite examples/using_ruby.bs
Wow!
Wow!
Wow!
Wow!
Wow!

$ bitec examples/using_ruby.bs

$ javap -c examples/using_ruby
Compiled from "examples.using_ruby.bs"
public class examples.using_ruby extends java.lang.Object{
public static void main(java.lang.String[]);
Code:
0: ldc #9; //String Wow!
2: getstatic #15; //Field java/lang/System.out:Ljava/io/PrintStream;
5: swap
6: invokevirtual #21; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V
9: ldc #9; //String Wow!
11: getstatic #15; //Field java/lang/System.out:Ljava/io/PrintStream;
14: swap
15: invokevirtual #21; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V
18: ldc #9; //String Wow!
20: getstatic #15; //Field java/lang/System.out:Ljava/io/PrintStream;
23: swap
24: invokevirtual #21; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V
27: ldc #9; //String Wow!
29: getstatic #15; //Field java/lang/System.out:Ljava/io/PrintStream;
32: swap
33: invokevirtual #21; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V
36: ldc #9; //String Wow!
38: getstatic #15; //Field java/lang/System.out:Ljava/io/PrintStream;
41: swap
42: invokevirtual #21; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V
45: return

}
This last example shows the resulting JVM bytecode as well.

Future plans for BiteScript include making it have better error detection (right now it just falls back on the JVM bytecode verifier, which is not the most descriptive thing in the world) and improving the API to more easily handle all the various combinations of class, field, and method modifiers. I'd also like to make it detect if you're doing bad things to the stack to save you the hassle of interpreting verification errors that may not happen until runtime.

Anyway, give it a try and feel free to contribute; the code is all Ruby, wrapping the ASM bytecode library, so anyone that knows Ruby can tweak it. The project page and wiki are hosted at Kenai.com: http://kenai.com/projects/jvmscript

And if you're not up on the JVM or JVM bytecodes, the JVM Specification is an easy-to-read complete reference for code targeting the JVM, and here is my favorite JVM opcode quickref. [Less]