Execute iron python async (not on the application thread)

[Tom Bernens]

I am in need to execute a iron python script asyncronously, without locking up the main application thread. I have a delegate function already defined but any time I try to spawn a new thread, Spotfire simply crashes. Code snippit below. This code works fine when running a standalone application, I can have a parent form still be active and responsive with my IV form also active and responsive, but in spotfire it doesn't seem to want to behave.

 

def SpawnIV():

iv.ShowDialog()

CleanupAndSave()

iv = ImageViewer(mapping, trellisLevels)

t = Thread(ThreadStart(SpawnIV))

t.SetApartmentState(ApartmentState.STA)

t.Start();

 

 

I have also tried using a worker thread class to invoke the method async, but this simply does nothing:

 

class IVWorker:

def __init__(self, imageViewer):

self.application = Application

self.applicationThread = self.application.GetService[ApplicationThread]()

self.iv = imageViewer

def Start(self):

self.applicationThread.ExecuteOnWorkerThread("IV Worker Thread", self.StartIVWorker)

 

def StartIVWorker(self):

self.applicationThread.InvokeAsynchronously(self.SpawnIV)

def SpawnIV():

self.iv.ShowDialog()

CleanupAndSave()

iv = ImageViewer(mapping, trellisLevels)

ivWorker = IVWorker(iv)

ivWorker.Start()

 

 

EDIT: I have been able to get this (partly) working using a .NET background worker, however due to the multi threaded scope change, I lose referecenses to all of my imports, is there a way to ensure that when spawning the second thread, all of the imports are carried along with it Normally I would use the sys package however this is not installed in Tibco's implementation of IronPython. Inside of the dialog, any actions result in JIT errors like "range" "len" or "zip" is not defined, which are all functions in the __builtin__ namespace, however it seems like every include is unloaded in the second thread....

def bw_DoWork(sender, args):

iv = args.Argument[0]

iv.ShowDialog()

iv = ImageViewer(mapping, trellisLevels)

iv_bw = BackgroundWorker()

iv_bw.DoWork += bw_DoWork

iv_bw.RunWorkerAsync([iv])

 

 

EDIT2: By using the line

import __builtin__

 

at the beginning of every def in my form class, and referencing functions like..

__builtin__.len(), __builtin.range()

 

this problem has been solved

[Tom Bernens]

EDIT: I have been able to get this (partly) working using a .NET background worker, however due to the multi threaded scope change, I lose referecenses to all of my imports, is there a way to ensure that when spawning the second thread, all of the imports are carried along with it Normally I would use the sys package however this is not installed in Tibco's implementation of IronPython. Inside of the dialog, any actions result in JIT errors like "range" "len" or "zip" is not defined, which are all functions in the __builtin__ namespace, however it seems like every include is unloaded in the second thread....

def bw_DoWork(sender, args):

iv = args.Argument[0]

iv.ShowDialog()

iv = ImageViewer(mapping, trellisLevels)

iv_bw = BackgroundWorker()

iv_bw.DoWork += bw_DoWork

iv_bw.RunWorkerAsync([iv])

 

EDIT2: By using the line

import __builtin__

at the beginning of every def in my form class, and referencing functions like..

__builtin__.len(), __builtin.range()

this problem has been solved

[Nikita Belooussov]

Hi,

 

I know it has been a while,but I was wondering if you think your code would be able to preform any functions that come with Spotfire. I am guessing it cant since you mentioned that the imported library gets lost. Did you ever solve that issue

 

Thanks

[Alexandre Verri]

This is ridiculous, the framework should support background threads out of the box without having to do this annoying approach. Until now, I haven't gotten background threads working, and the lack of documentation and support sucks.