Re: [Jython-users] Multiple Jython interpreters in different

[Paul G. <pau...@so...>]

 Barnabas Wolf wrote:
 >I'm trying to add Python scripting capabilities to an existing Java
 >application.  I would need to be able to execute scripts fully
 >independently in different threads.  I've attempted this by creating
 >an instance of PythonInterpreter in each of the threads.  This approach
 >appears to work, but not perfectly.  For example, all interpreters
 >share the same IO streams -- calling setOut(), setErr(), etc. on any
 >of the interpreters will redirect *all* of the interpreters to the
 >new stream.  This particular problem is not a complete show stopper,
 >but it makes me worry about how independent the interpreters really
 >are.


I have also tried to use multiple interpreters in different threads. 
That was a while back using JPython 1.1. At that time, the different 
threads corrupted each other in short order. I have not tried again 
recently, but after looking inside the jython code, I see that quite a 
lot of state information is stored statically, which leads me to believe 
that jython was not designed for multithreaded used in this way. If so, 
that is a shame, as this would be very useful.

Perhaps someone knows otherwise and can tell us what we are doing wrong?

-Paul

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