I have a simple intranet web app whose job is to synchronize a couple of databases. The web part is that you can change settings such as how often the sync should happen, force the sync, or see the log. Since it runs periodically, I want the process that does the db sync to run happily along but be aware of when a setting is changed. So in my simple mind I envision 2 threads: start the sync process, start the web server and hope that when the web server handles some request and changes a setting, the sync process knows about it. The final requirement is that the server can know if the sync process is running already should someone try to manually start the sync.
Anyway, I have tried messing around with the threading module and referenced some examples I have come across, but to no avail. Fundamentally I expected that when I change a global variable in 1 thread, the new value would be picked up in any other thread. This does not appear to be the case. (I understand that there are lots of potential issues with this but only 1 thread ever shanges the value anyhow.) I have not even tried blocking the sync process if it is already going. The candygram module (http://candygram.sourceforge.net/) might be the way for me to go, but I would still like to understand this pretty basic question. So any insight, advice, or references on the problem as described would be very welcome. It seems it must be fairly common. Peace, David S. -- http://mail.python.org/mailman/listinfo/python-list
