docs: add advanced tip about scheduling function calls #2617
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We learned why replicating the API of another library sucks back when `sopel.web` contained wrappers for various tools from `requests`, and we don't want to do it again. Setting up a scheduler for one's plugin doesn't take a lot of work. It's not ideal for multiple plugins to all have their own `interval` checks for whether there are any pending tasks to run, but we can drop this new section from the docs if we find a decent compromise.
This appears to have been fixed as part of the big rule-system rewrite
back in 7.1. The rule system now also considers the *start* time of the
callable's most recent run in the given context, if it hasn't finished
running since the last time it was started.
I also tested this with a very basic plugin:
import sched
import time
from sopel import plugin
s = sched.scheduler(time.time, time.sleep)
@plugin.rate(60)
@plugin.command('testrate')
def rate_limited(bot, trigger):
s.enter(30, 2, bot.say, argument=('hi',))
s.run()
Despite trying to run `.testrate` three times in a few seconds, as a non
admin user, the bot only said "hi" once.
dgw
added
Low Priority
Documentation
Housekeeping
Exirel
approved these changes
Sep 2, 2024
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How to do this was discussed fairly well in #1222 a while ago, and I just cribbed an example from there.
I also found an apparently obsolete note about using
schedwith@plugin.rateand friends while poking around the topic of scheduled callables, because I tested what it said and found that the caveat no longer applies (see #825).Checklist
make qa(runsmake lintandmake test)Notes
Along the way I also briefly considered giving the
botascheduleinstance that it provides to plugins, but I'm not ready to commit to that kind of API addition yet. Putting this into the tips & tricks section is better than pointing to a random issue comment on the occasions when "how do I schedule a function at a specific time?" comes up, and it doesn't preclude API additions at a later time if we come up with a sane decorator interface for it.