Charlie,
I will definitely look up the presentation, and I appreciate yourself
possibly repeating yourself here. I will throw up a wiki page to help other
padawans like myself.
Jon
2011/10/18 Charles Oliver Nutter <head...@headius.com>
> I thought for sure I wrote up all this at one point, but perhaps not.
>
> Last year at RubyConf, Tom and I presented a hacking guide for JRuby
> that might have some information useful to you. I'll answer your
> specific questions below.
>
> In that jruby-spymemcached lib I linked, there's a Ruby file with an
> example of loading a JRuby extension. These days, I prefer the method
> I use there. There's a way to also get .jar files to be
> autodiscovered, but it's flaky and weird and not as explicit as it
> could be.
>
> WRT arguments:
>
> * ThreadContext is optional. The binding will detect if you want it or
> not. You can always get it from thread locals
> (getRuntime().getCurrentContext()) but passing it eliminates the
> threadlocal hit.
> * You can split methods up by how many args they take, using any
> combination from zero to 3 args. Above that, you specify it as an
> IRubyObject[] and include required/optional/rest counts in the
> extensions. Splitting up by arity greatly reduces the invocation cost,
> since we don't have to box argument lists.
> * Block is optional; if you want to call it, you need to declare it.
> If you don't declare it, it's hard or impossible to get at any passed
> block (so passed blocks are generally ignored).
>
> That should help you on your way. If you start a wiki page I'll help
> fill it out.
>
> - Charlie
>
> On Tue, Oct 18, 2011 at 11:56 PM, Jonathan Coveney <jcove...@gmail.com>
> wrote:
> > A possibly related question:
> >
> > I want to implement list for a custom object...for guidance I am looking
> at
> > RubyArray's implementation. The method signature for each is:
> > public IRubyObject each(ThreadContext context, Block block) {
> > return block.isGiven() ? eachCommon(context, block) :
> > enumeratorize(context.getRuntime(), this, "each");
> > }
> >
> > What controls which methods receive a ThreadContext and which do not? I
> look
> > in the method declarations and some do, some do not. If I have a method
> that
> > needs the runtime, is there a way that I can get it?
> >
> > Thanks for your help, I promise I'll try and pay it forward :)
> > Jon
> >
> > 2011/10/18 Jonathan Coveney <jcove...@gmail.com>
> >>
> >> Charlie,
> >>
> >> Thanks for your guidance.
> >>
> >> It makes sense that you need to have this binding, but I'm not sure
> about
> >> how to implement Library. What action causes load to be invoked? A
> require
> >> statement?
> >>
> >> Thanks
> >>
> >> 2011/10/18 Charles Oliver Nutter <head...@headius.com>
> >>>
> >>> Hmm, not really any good docs. Along with annotating, you need to
> >>> define the extension classes and tell them to bind annotated methods.
> >>> A good example extension would be jruby-spymemcached:
> >>>
> >>> https://github.com/headius/jruby-spymemcached
> >>>
> >>> Key details are clsOrMod.defineAnnotatedMethods(Something.class) and
> >>> not shown in this extension is the constant version
> >>> clsOrMod.defineAnnotatedConstants(Something.class).
> >>>
> >>> - Charlie
> >>>
> >>> On Tue, Oct 18, 2011 at 11:34 PM, Jonathan Coveney <jcove...@gmail.com
> >
> >>> wrote:
> >>> > Adding to this, I tried including @JRubyMethod tags and whatnot as
> per
> >>> > the
> >>> > instructions, and I compiled my project and it didn't seem like they
> >>> > got
> >>> > picked up...is there something special I need to do?
> >>> >
> >>> > Thanks again. I am really intrigued by this project.
> >>> >
> >>> > 2011/10/18 Jonathan Coveney <jcove...@gmail.com>
> >>> >>
> >>> >> Is there any documentation on using @JRubyMethod, @JRubyClass, that
> >>> >> sort
> >>> >> of thing, and the arguments that they accept? I can sort of figure
> it
> >>> >> out
> >>> >> from the source but it is all uncommented and I can't find anything
> in
> >>> >> the
> >>> >> wiki. In the same vein, any tips on extending RubyObject would be
> >>> >> lovely.
> >>> >>
> >>> >> Thanks!
> >>> >> Jon
> >>> >
> >>> >
> >>>
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> >>>
> >>>
> >>
> >
> >
>
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