Hi Charlie,

On Wed, Jan 6, 2010 at 9:58 AM, Charles Oliver Nutter
<[email protected]> wrote:
> Ok, it's time to start biting off a big change: we need to make the
> JRuby runtime be classloader-global (i.e. static).

Do you already have this new JRuby runtime in somewhere? If you have,
I want to start using classloader-global runtime for emedding API.
Current thread safe model works under a limited case. I think I should
rethink thread safe concurrent evaluations from its design. The idea
of classloader-global and classloder subdomain could be the answer.
Besides, like Kevin's case (jruby -> rails -> java(embedding) ->
ruby), we need static runtime in some cases. There might be issues to
be solved such as states that current runtime has, but I think we'll
be able to find the best way to manage them.

-Yoko

>
> There's many reasons for this:
>
> * You won't have to pass a Ruby instance into object construction
> * Serialization will work, since it will just be able to grab the
> classloader-global Ruby instance when constructing
> * All core classes will be able to start inline caching calls back to
> Ruby (where they do almost *no* caching right now)
> * Replacing arbitrary pieces of Java code with Ruby code will be *much* easier
>
> And the list goes on.
>
> Perhaps the most important person I'd like to see in this discussion
> would be Yoko Harada, since it may be possible to hide all this behind
> RedBridge and the 223/BSF engines. But I'd like to hear from others
> interested in the above features/changes, or from anyone with concerns
> about how this change might affect their code.
>
> For the record, this will almost exclusively impact only users
> embedding JRuby or calling into JRuby from non-Ruby code. Users
> running plain-old-Ruby probably will never see any real impact.
>
> - Charlie
>
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