Clean up some LoggingContext stuff (#7120)

* Pull Sentinel out of LoggingContext

... and drop a few unnecessary references to it

* Factor out LoggingContext.current_context

move `current_context` and `set_context` out to top-level functions.

Mostly this means that I can more easily trace what's actually referring to
LoggingContext, but I think it's generally neater.

* move copy-to-parent into `stop`

this really just makes `start` and `stop` more symetric. It also means that it
behaves correctly if you manually `set_log_context` rather than using the
context manager.

* Replace `LoggingContext.alive` with `finished`

Turn `alive` into `finished` and make it a bit better defined.
This commit is contained in:
Richard van der Hoff 2020-03-24 14:45:33 +00:00 committed by GitHub
parent 1fcf9c6f95
commit 39230d2171
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24 changed files with 232 additions and 222 deletions

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@ -21,7 +21,7 @@ from prometheus_client import Counter
from twisted.internet import defer
from synapse.logging.context import LoggingContext
from synapse.logging.context import LoggingContext, current_context
from synapse.metrics import InFlightGauge
logger = logging.getLogger(__name__)
@ -106,7 +106,7 @@ class Measure(object):
raise RuntimeError("Measure() objects cannot be re-used")
self.start = self.clock.time()
parent_context = LoggingContext.current_context()
parent_context = current_context()
self._logging_context = LoggingContext(
"Measure[%s]" % (self.name,), parent_context
)