Re: [Jython-users] Embedding jython

[Carlos Q. <car...@we...>]

On Wednesday 26 September 2001 23:57, Mat...@i2... wrote:
Some answers
> Hi all,
>
> I recently discovered jython - I must say, very cool!
>
> I'm trying to embed a jython interpreter within a java application, and I
> have most things working, but have a few questions:
>
> 1) With an embedded interpreter, do I still need the jython distribution
> directory in order for the scripts I run to have access to the standard
> lib (Lib\*.py)?

Yes, or you can create a jar containin al libs and distribute that. In this 
case you have to explictly add the file to sys.path

> 2) How do I add an instance of a Java object to the namespace I pass to
> the PythonInterpreter exec() method?
You can set a variable beforfe

interpeter.set(object, "name")
interpeter.exec("foo(name)")

> 3) How do I programmatically define a python class (and instantiate it)
> and pass it to the interpreter as in (2) ?  By programmatically I mean
> calling a bunch of java methods and _not_ simply evaluating a string that
> has my python class.
Can you explain this a little bit better, do you want to programatically 
define the class interface and implementation?

> 4) W.r.t (2) and (3) what I'm really trying to do is delegate to a Java
> instance from a Python instance so I can default some of the arguments on
> some methods (i.e. make a nicer interface to my java internals for the
> script writers).  Any tips on how to do this?
> 5) I setup my own SecurityManager to deny exits so that scripts can't
> terminate my java process - anyone know of a better way to do this?
Not me at least

> 6) If no to (5), I wrap my script execution in a try/except block to catch
> my DenyExitSecurityException, thus enabling me to swallow the ugly stack
> trace when a script calls exit, however, this only works when the script
> calls the java System.exit(), with sys.exit() I still get the stack trace.
>  Any idea how to stop this before I go digging around in the code?
>
> Any help appreciated, thanks,
>
> Matt
> mat...@i2...
>
>
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