On 07/14/2009 06:37 PM, vit...@synapticvision.com wrote: > > "cancel" callback - stop running now what you've been asked to exec. > Example: some SQL query that takes 5 min and I need to cancel it > anywhere in the middle and it, of course, it doesn't matter what the > result set. >
It seems like the problem you have is similar to what is described here: http://www.dabeaz.com/python/GIL.pdf Although this deals with Python's threading (and technology-wise, it's completely unrelated to Twisted), the fundamental problems that they are trying to solve are the same that Twisted tries to. Unless I got it all wrong, you might need to "cancel the deferred" because the actual operation being performed "locks" the CPU. The example of the query taking five minutes is a bit misleading, I think, because that is actually an operation that is deferred to an external service and so it's more IO-bound than CPU-bound. So maybe you do not actually need that. In case you do, as others have pointed out, the application code must either "quit" by itself or some sort of timeout (a "watchdog") has to be put in place. Hope this will help and not confuse more ;) Simone _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
