get working on JRuby

I'm still trying to get Ruby allowed at work, and JRuby is probably the runtime I'd have to use. Count me a +1 vote.

EM (trunk) has a java version, Rack seems to install OK on JRuby, so I imagine the parser is the only piece not already there. It seems it wouldn't be too much work to port the Mongrel java parser.

I've started playing with this today, but MacPorts has Ragel 6.0, which has breaking changes from older versions, so the *.rl files from Mongrel don't work.

we need EM to release for jruby before we can do anything.

Yeah, finally!

I'm working on a java-based backend for Thin. Not sure how it's going to work out because Thin depends on EM for more than just the backend. If we can divorce Thin from EM and constrain EM to backend code, then Thin on JRuby might really rock.

Aman sent me this:

fyi, i got the java reactor working

http://github.com/tmm1/eventmach...

ran some of my EM libraries through it and it seems to work without modifications or problems

Aman

===

@kevin: Thin should not depend on EM anymore, only Backends::Base does depend on it. thin-turbo is a non-EM backend and is works fine.

lib/thin.rb requires EM, and lib/thin/connection.rb has the Connection class extending EventMachine::Connection. Am I not looking at the right branch or something? I admit I haven't tried running Thin on JRuby without EM installed, but I didn't think I could yet. What am I missing?

ah right, we can fix that by require all things EM in the Backends::Base, so it it's not loaded EM will not be required.

Hm, but we'll need to tweak the gem to require EM gem only on non-jruby installation.

Any better way to make EM optional?

Perhaps have a safe alternate backend based on webrick or mongrel? The backend selection code could try to load the EM gem and choose a different backend if not found.

That would probably mean creating an explicit EM backend, rather that putting EM stuff in Backends::Base.

EM for JRuby isn't formally released, so I haven't tried to do anything yet. I'm continuing to working on getting something based on Mina to work. Almost got it now, just trying to figure out Rack and plugging the two together.

The latest version of Mina - no, I haven't released it yet.

I've been dabbling with my Mina (now Netty) based server for years now. I rarely have time to work on it, and when I do, it never works quite right.

Something very close to what I've been trying to build is https://github.com/matadon/mizuno which uses Jetty. Mizuno seems to work, which is more than I can say for my server. :)

Now that EventMachine does work on JRuby, perhaps very little is needed to get Thin to work, although the http-parser extension might be a problem. I'd be surprised if it were faster than something more native to Java based on Netty or Jetty, though.

I don't code in Ruby anymore, and I'm worried about the future of Java in general, so of anyone would like to take this over I'll be happy to hand over responsibility.

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