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Make LruCache register its own metrics (#8561)

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rather than have everything that instantiates an LruCache manage metrics
separately, have LruCache do it itself.
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Richard van der Hoff 2020-10-16 15:51:57 +01:00 • committed by GitHub
parent da0090fdff
commit 3ee17585cd
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8 changed files with 62 additions and 62 deletions
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13
synapse/util/caches/__init__.py
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@ -16,7 +16,7 @@
import logging
from sys import intern
from typing import Callable, Dict, Optional
from typing import Callable, Dict, Optional, Sized
import attr
from prometheus_client.core import Gauge
@ -92,7 +92,7 @@ class CacheMetric:
def register_cache(
cache_type: str,
cache_name: str,
cache,
cache: Sized,
collect_callback: Optional[Callable] = None,
resizable: bool = True,
resize_callback: Optional[Callable] = None,
@ -100,12 +100,15 @@ def register_cache(
"""Register a cache object for metric collection and resizing.
Args:
cache_type
cache_type: a string indicating the "type" of the cache. This is used
only for deduplication so isn't too important provided it's constant.
cache_name: name of the cache
cache: cache itself
cache: cache itself, which must implement __len__(), and may optionally implement
a max_size property
collect_callback: If given, a function which is called during metric
collection to update additional metrics.
resizable: Whether this cache supports being resized.
resizable: Whether this cache supports being resized, in which case either
resize_callback must be provided, or the cache must support set_max_size().
resize_callback: A function which can be called to resize the cache.
Returns: