Re: [Jython-users] How to use cpython and jython together?

[Robert W. B. <rb...@di...>]

Hi Joseph,

On Thu, 22 Mar 2001, Joseph S. Barrera III wrote:
> I love jython, but as we all know it's missing some library
> functionality, especially in the shell/filesystem/os area, for the
> reason that it's hard or impossible to implement such functionality in
> pure Java.
>
> Is there some easy way of writing a program mostly in jython, and a
> little in cpython (for the functionality missing in jython), and
> sticking the parts together? If so, how?

The word "easy" limits the field here, doesn't it :)
Faking the behavior you need with Runtime() could work, is potentially
easy, but is suspect as a solution.  Brian was kind enough to post
snippets of using getRuntime().exec() recently.  His mail is found:

   http://www.geocrawler.com/lists/3/SourceForge/7017/25/5376101/

Brian also pointed out a nice article on exec() traps found:

   http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

> The reason I don't just go with pure cpython is that I depend a lot on
> the nice integration between jython and java, and I suspect that
> moving to pure cpython would be a real pain. (But I don't know cpython
> well enough to know that for sure.)

I doubt cpython would be a pain for someone already comfortable with
Jython.  Unless you mean that writing C extensions would be required for
your project and that portion would be the pain.  It seems
unlikely that you would need such extensions for os services though.
However, this java/Cpython integration seem to be a recurrent issue.
There is even a project called cyphon which addresses this, found at:

   http://www.one.net.au/~effbaie/cyphon.html

there is also a jpe project (java python extension maybe?) but I don't
know it's url or status.  Maybe one of these project would be
worth looking into.

Cheers,
Robert