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Rename Cache->DeferredCache

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This commit is contained in:
Richard van der Hoff 2020-10-14 19:43:37 +01:00
parent 7eff59ec91
commit 9f87da0a84
8 changed files with 30 additions and 25 deletions
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19
synapse/util/caches/descriptors.py
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@ -99,7 +99,7 @@ class CacheEntry:
self.callbacks.clear()
class Cache(Generic[KT, VT]):
class DeferredCache(Generic[KT, VT]):
"""Wraps an LruCache, adding support for Deferred results.
It expects that each entry added with set() will be a Deferred; likewise get()
@ -225,7 +225,10 @@ class Cache(Generic[KT, VT]):
return default
def set(
self, key: KT, value: defer.Deferred, callback: Optional[Callable[[], None]] = None
self,
key: KT,
value: defer.Deferred,
callback: Optional[Callable[[], None]] = None,
) -> ObservableDeferred:
if not isinstance(value, defer.Deferred):
raise TypeError("not a Deferred")
@ -427,13 +430,13 @@ class CacheDescriptor(_CacheDescriptorBase):
self.iterable = iterable
def __get__(self, obj, owner):
cache = Cache(
cache = DeferredCache(
name=self.orig.__name__,
max_entries=self.max_entries,
keylen=self.num_args,
tree=self.tree,
iterable=self.iterable,
) # type: Cache[Tuple, Any]
) # type: DeferredCache[Tuple, Any]
def get_cache_key_gen(args, kwargs):
"""Given some args/kwargs return a generator that resolves into
@ -677,9 +680,9 @@ class _CacheContext:
_cache_context_objects = (
WeakValueDictionary()
) # type: WeakValueDictionary[Tuple[Cache, CacheKey], _CacheContext]
) # type: WeakValueDictionary[Tuple[DeferredCache, CacheKey], _CacheContext]
def __init__(self, cache, cache_key): # type: (Cache, CacheKey) -> None
def __init__(self, cache, cache_key): # type: (DeferredCache, CacheKey) -> None
self._cache = cache
self._cache_key = cache_key
@ -688,7 +691,9 @@ class _CacheContext:
self._cache.invalidate(self._cache_key)
@classmethod
def get_instance(cls, cache, cache_key): # type: (Cache, CacheKey) -> _CacheContext
def get_instance(
cls, cache, cache_key
): # type: (DeferredCache, CacheKey) -> _CacheContext
"""Returns an instance constructed with the given arguments.
A new instance is only created if none already exists.