[Twisted-Python] Twisted on Jython

Tobias Oberstein tobias.oberstein at tavendo.de
Fri Mar 8 06:18:25 EST 2013


we've been asked if Autobahn runs under Jython. Since there is an upcoming Jython version that supports 2.7 Python API, I thought I'd give it a try.

To my astonishment, I was able to get Autobahn working with minor efforts ...

Tested: Twisted 12.3 under Jython from sources (together with zope.interface 4.05 and setuptools from sources) after applying the following patches. Stock AutobahnPython 0.6 from source.

1) Missing __builtin__.buffer

The following is a workaround due to http://bugs.jython.org/issue1521


# workaround for Jython, see: http://bugs.jython.org/issue1521
import __builtin__
if not hasattr(__builtin__, 'buffer'):
    def _buffer(object, offset = None, size = None):
       if offset is None:
          offset = 0
       if size is None:
          size = len(object)
       return object[offset:offset+size]
    __builtin__.buffer = _buffer

at the beginning of "twisted/python/compat.py".

2) Weird platform ident

Jython identifies itself as "Java" .. I was testing on Windows.


Line 36

    #'java': 'java',
    'java': 'win32',

This is necessary on Windows since otherwise Posix API is assumed.

Of course above is just a quick hack.

Jython 2.7b1 (default:ac42d59644e9, Feb 9 2013, 15:24:52)
[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.7.0
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys, os
>>> sys.platform
>>> os.name

IMHO, os.name should return the real underlying OS on Jython, not "java" .. what do you think?


Where should those issue be adressed? Should Twisted include workarounds or should I lobby at Jython to "do the right" thing?


Mit freundlichen Grüßen,

Tobias Oberstein

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