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Allow modules to run looping call on all instances (#10638) 

By default the calls only ran on the worker configured to run background
tasks.
This commit is contained in:
Erik Johnston 2021-08-18 11:21:11 +01:00 committed by GitHub
parent 703e3a9e85
commit 5581dd7bf7
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2 changed files with 9 additions and 1 deletions
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changelog.d/10638.feature Normal file
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@ -0,0 +1 @@
Add option to allow modules to run periodic tasks on all instances, rather than just the one configured to run background tasks.

9
synapse/module_api/__init__.py
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@ -604,10 +604,15 @@ class ModuleApi:
msec: float,
*args,
desc: Optional[str] = None,
run_on_all_instances: bool = False,
**kwargs,
):
"""Wraps a function as a background process and calls it repeatedly.
NOTE: Will only run on the instance that is configured to run
background processes (which is the main process by default), unless
`run_on_all_workers` is set.
Waits `msec` initially before calling `f` for the first time.
Args:
@ -618,12 +623,14 @@ class ModuleApi:
msec: How long to wait between calls in milliseconds.
*args: Positional arguments to pass to function.
desc: The background task's description. Default to the function's name.
run_on_all_instances: Whether to run this on all instances, rather
than just the instance configured to run background tasks.
**kwargs: Key arguments to pass to function.
"""
if desc is None:
desc = f.__name__
if self._hs.config.run_background_tasks:
if self._hs.config.run_background_tasks or run_on_all_instances:
self._clock.looping_call(
run_as_background_process,
msec,