From: "Andrew S. Townley" <ast@...>
Date: 2009-02-27T19:59:33+09:00
Subject: Re: JRuby on Java ME

Hi Charlie,

That's great news!  I was wondering about this again since I saw the
post about JRuby on Android.  I've been trying to figure out the best
way to get Ruby on my Windows mobile phone so I could do some quick
scripting without needing to go through the compile process for either
J2ME or WinMobile/.NET CF, because I don't have those set up at the
moment.

Looks like this may be just the thing I need to test a couple of things.

Cheers,

ast

On Fri, 2009-02-27 at 19:24 +0900, Charles Oliver Nutter wrote:
> Another one several of you have asked about...JRuby running on Java ME:
> 
> http://gist.github.com/71393
> 
> This is using Sun's reference implementation "cvm" with the CDC 
> (Connected Device Configuration) and the PBP (Personal Basis Profile) 
> set of classes. It's basically the same as what you'd have on a Java 
> ME-enabled phone or embedded device supporting the same level of APIs.
> 
> PBP is available here, for Linux only. I'm not sure whether it's been 
> open-sourced yet or not, but I thought it was planned:
> 
> http://java.sun.com/javame/downloads/index.jsp
> 
> The project is hosted here:
> 
> http://github.com/headius/jruby-cdc/tree/master
> 
> It's essentially JRuby 1.2 forked and stripped of libraries and code 
> that aren't supported in CDC. My intention with this is to get it 
> running with a base set of Ruby classes but with Java integration still 
> functional. That will allow most basic Ruby scripts to work while 
> providing access to the rest of the Java APIs for bits I had to rip out.
> 
> It's only running interpreted right now, just like the Android version 
> of JRuby, but as in that case I expect most people would want to 
> precompile Ruby code and ship it all as one unit.
> 
> I think there are many other possible ways we could repurpose JRuby like 
> this; it really only took me a couple days of trimming to get this far. 
> Android will take far less time, and other "mini ruby" profiles might be 
> possible for other platforms as well.
> 
> Questions, comments, patches welcome :)
> 
> - Charlie
> 
-- 
Andrew S. Townley <ast@atownley.org>
http://atownley.org