Ampoule 0.1 does not work on Windows XP

[UmitOz]

Hello,

I am trying to run Ampoule on windows. On my windows XP (SP3) machine I got the following error when trying to run the examples:

        Traceback (most recent call last):
          File "c:\python25\lib\site-packages\twisted\internet\defer.py", line 7
37, in _inlineCallbacks
            result = g.send(result)
          File "C:\Documents and Settings\dia\Desktop\ampoule-0.1\examples\pid.p
y", line 25, in _run
            yield pp.start()
          File "c:\python25\lib\site-packages\ampoule-0.1-py2.5.egg\ampoule\pool
.py", line 97, in start
            return self.adjustPoolSize()
          File "c:\python25\lib\site-packages\twisted\internet\defer.py", line 8
22, in unwindGenerator
            return _inlineCallbacks(None, f(*args, **kwargs), Deferred())
        --- <exception caught here> ---
          File "c:\python25\lib\site-packages\twisted\internet\defer.py", line 7
37, in _inlineCallbacks
            result = g.send(result)
          File "c:\python25\lib\site-packages\ampoule-0.1-py2.5.egg\ampoule\pool.py", line 358, in adjustPoolSize
            self.startAWorker()
          File "c:\python25\lib\site-packages\ampoule-0.1-py2.5.egg\ampoule\pool.py", line 192, in startAWorker
            ampParent=self.ampParent)
          File "c:\python25\lib\site-packages\ampoule-0.1-py2.5.egg\ampoule\main.py", line 212, in startAMPProcess
            return self.startPythonProcess(prot, self.childReactor, fullPath)
          File "c:\python25\lib\site-packages\ampoule-0.1-py2.5.egg\ampoule\main.py", line 228, in startPythonProcess
            usePTY=self.usePTY, packages=self.packages)
          File "c:\python25\lib\site-packages\ampoule-0.1-py2.5.egg\ampoule\main.py", line 260, in spawnProcess
            childFDs={0:"w", 1:"r", 2:"r", 3:"w", 4:"r"})
          File "c:\python25\lib\site-packages\twisted\internet\posixbase.py", line 231, in spawnProcess
            raise ValueError("Customizing childFDs is not supported on Windows.")
        exceptions.ValueError: Customizing childFDs is not supported on Windows.

Any help is appreciated.

[dialtone (dialtone)]

Uhm... This is a pretty nasty one. the fix is not so super easy. I committed just now a fix in the repository but it's not yet tested on windows (it works on osx so I suppose also on linux). I'll check on windows during the weekend but in the meantime you might give the new code a try. thanks for reporting.

[dialtone (dialtone)]

I was forgetting... Notice however that some libraries/software misbehave and write errors on stdout completely breaking communication between parent and child processes. One such example is GTK+. So be warned that windows is not the friendliest guy for processes.

[UmitOz (umit-oztosun-net)]

Thanks for your patch, however I am getting another error while trying to run the example basic.py:
(It goes into an infinite loop)

Unhandled error in Deferred:
Traceback (most recent call last):
  File "c:\python25\lib\site-packages\twisted\internet\defer.py", line 737, in _inlineCallbacks
    result = g.send(result)
  File "C:\Documents and Settings\dia\Desktop\ampoule\examples\basic.py", line 20, in _run
    l = [pp.doWork(Ping) for x in xrange(REPEATS)]
  File "c:\python25\lib\site-packages\ampoule-0.1.1-py2.5.egg\ampoule\pool.py", line 282, in doWork
    self._cb_doWork(command, _d=d, **kwargs)
  File "c:\python25\lib\site-packages\ampoule-0.1.1-py2.5.egg\ampoule\pool.py", line 261, in _cb_doWork
    return defer.maybeDeferred(child.callRemote, command, **kwargs
--- <exception caught here> ---
  File "c:\python25\lib\site-packages\twisted\internet\defer.py", line 106, in maybeDeferred
    result = f(*args, **kw)
  File "C:\Python25\Lib\site-packages\twisted\protocols\amp.py", line 723, in callRemote
    return co._doCommand(self)
  File "C:\Python25\Lib\site-packages\twisted\protocols\amp.py", line 1532, in _doCommand
    self.requiresAnswer)
  File "C:\Python25\Lib\site-packages\twisted\protocols\amp.py", line 657, in _sendBoxCommand
    box._sendTo(self.boxSender)
  File "C:\Python25\Lib\site-packages\twisted\protocols\amp.py", line 482, in _sendTo
    proto.sendBox(self)
  File "C:\Python25\Lib\site-packages\twisted\protocols\amp.py", line 1847, in sendBox
    self.transport.write(box.serialize())
  File "c:\python25\lib\site-packages\ampoule-0.1.1-py2.5.egg\ampoule\main.py", line 73, in write
    self.transport.writeToChild(TO_CHILD, data)
exceptions.AttributeError: Process instance has no attribute 'writeToChild'