On Nov 2, 2017, at 12:36 PM, Chris Angelico <ros...@gmail.com> wrote: > > On Fri, Nov 3, 2017 at 7:35 AM, Israel Brewster <isr...@ravnalaska.net > <mailto:isr...@ravnalaska.net>> wrote: >> On Nov 2, 2017, at 12:30 PM, Chris Angelico <ros...@gmail.com> wrote: >>> >>> On Fri, Nov 3, 2017 at 5:54 AM, Israel Brewster <isr...@ravnalaska.net> >>> wrote: >>>> I have a Flask/UWSGI web app that serves up web socket connections. When a >>>> web socket connection is created, I want to store a reference to said web >>>> socket so I can do things like write messages to every connected >>>> socket/disconnect various sockets/etc. UWSGI, however, launches multiple >>>> child processes which handle incoming connections, so the data structure >>>> that stores the socket connections needs to be shared across all said >>>> processes. How can I do this? >>>> >>> >>> You're basically going to need to have a single process that manages >>> all the socket connections. Do you actually NEED multiple processes to >>> do your work? If you can do it with multiple threads in a single >>> process, you'll be able to share your socket info easily. Otherwise, >>> you could have one process dedicated to managing the websockets, and >>> all the others message that process saying "please send this to all >>> processes". >> >> Ok, that makes sense, but again: it's UWSGI that creates the processes, not >> me. I'm not creating *any* processes or threads. Aside from telling UWSGI to >> only use a single worker, I have no control over what happens where. But >> maybe that's what I need to do? >> > > That's exactly what I mean, yeah. UWSGI should be able to be told to > use threads instead of processes. I don't know it in detail, but a > cursory look at the docos suggests that it's happy to use either (or > even both).
Gotcha, thanks. The hesitation I have there is that the UWSGI config is a user setting. Sure, I can set up my install to only run one process, but what if someone else tries to use my code, and they set up UWSGI to run multiple? I hate the idea of my code being so fragile that a simple user setting change which I have no control over can break it. But it is what it is, and if that's the only option, I'll just put a note in the readme to NEVER, under any circumstances, set UWSGI to use multiple processes when running this app and call it good :-) > > ChrisA > -- > https://mail.python.org/mailman/listinfo/python-list > <https://mail.python.org/mailman/listinfo/python-list> -- https://mail.python.org/mailman/listinfo/python-list
