diff options
| -rw-r--r-- | changelog.d/13667.feature | 1 | ||||
| -rw-r--r-- | scripts-dev/mypy_synapse_plugin.py | 4 | ||||
| -rw-r--r-- | synapse/module_api/__init__.py | 33 | ||||
| -rw-r--r-- | synapse/storage/_base.py | 23 | ||||
| -rw-r--r-- | synapse/storage/databases/main/cache.py | 20 | ||||
| -rw-r--r-- | synapse/util/caches/descriptors.py | 14 | ||||
| -rw-r--r-- | tests/replication/test_module_cache_invalidation.py | 79 |
7 files changed, 153 insertions, 21 deletions
diff --git a/changelog.d/13667.feature b/changelog.d/13667.feature new file mode 100644 index 0000000000..a0b3cfe18c --- /dev/null +++ b/changelog.d/13667.feature @@ -0,0 +1 @@ +Add cache invalidation across workers to module API. diff --git a/scripts-dev/mypy_synapse_plugin.py b/scripts-dev/mypy_synapse_plugin.py index d08517a953..2c377533c0 100644 --- a/scripts-dev/mypy_synapse_plugin.py +++ b/scripts-dev/mypy_synapse_plugin.py @@ -29,7 +29,7 @@ class SynapsePlugin(Plugin): self, fullname: str ) -> Optional[Callable[[MethodSigContext], CallableType]]: if fullname.startswith( - "synapse.util.caches.descriptors._CachedFunction.__call__" + "synapse.util.caches.descriptors.CachedFunction.__call__" ) or fullname.startswith( "synapse.util.caches.descriptors._LruCachedFunction.__call__" ): @@ -38,7 +38,7 @@ class SynapsePlugin(Plugin): def cached_function_method_signature(ctx: MethodSigContext) -> CallableType: - """Fixes the `_CachedFunction.__call__` signature to be correct. + """Fixes the `CachedFunction.__call__` signature to be correct. It already has *almost* the correct signature, except: diff --git a/synapse/module_api/__init__.py b/synapse/module_api/__init__.py index 9287c0fb8d..59755bff6d 100644 --- a/synapse/module_api/__init__.py +++ b/synapse/module_api/__init__.py @@ -125,7 +125,7 @@ from synapse.types import ( ) from synapse.util import Clock from synapse.util.async_helpers import maybe_awaitable -from synapse.util.caches.descriptors import cached +from synapse.util.caches.descriptors import CachedFunction, cached from synapse.util.frozenutils import freeze if TYPE_CHECKING: @@ -836,6 +836,37 @@ class ModuleApi: self._store.db_pool.runInteraction(desc, func, *args, **kwargs) # type: ignore[arg-type] ) + def register_cached_function(self, cached_func: CachedFunction) -> None: + """Register a cached function that should be invalidated across workers. + Invalidation local to a worker can be done directly using `cached_func.invalidate`, + however invalidation that needs to go to other workers needs to call `invalidate_cache` + on the module API instead. + + Args: + cached_function: The cached function that will be registered to receive invalidation + locally and from other workers. + """ + self._store.register_external_cached_function( + f"{cached_func.__module__}.{cached_func.__name__}", cached_func + ) + + async def invalidate_cache( + self, cached_func: CachedFunction, keys: Tuple[Any, ...] + ) -> None: + """Invalidate a cache entry of a cached function across workers. The cached function + needs to be registered on all workers first with `register_cached_function`. + + Args: + cached_function: The cached function that needs an invalidation + keys: keys of the entry to invalidate, usually matching the arguments of the + cached function. + """ + cached_func.invalidate(keys) + await self._store.send_invalidation_to_replication( + f"{cached_func.__module__}.{cached_func.__name__}", + keys, + ) + async def complete_sso_login_async( self, registered_user_id: str, diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py index e30f9c76d4..303a5d5298 100644 --- a/synapse/storage/_base.py +++ b/synapse/storage/_base.py @@ -15,12 +15,13 @@ # limitations under the License. import logging from abc import ABCMeta -from typing import TYPE_CHECKING, Any, Collection, Iterable, Optional, Union +from typing import TYPE_CHECKING, Any, Collection, Dict, Iterable, Optional, Union from synapse.storage.database import make_in_list_sql_clause # noqa: F401; noqa: F401 from synapse.storage.database import DatabasePool, LoggingDatabaseConnection from synapse.types import get_domain_from_id from synapse.util import json_decoder +from synapse.util.caches.descriptors import CachedFunction if TYPE_CHECKING: from synapse.server import HomeServer @@ -47,6 +48,8 @@ class SQLBaseStore(metaclass=ABCMeta): self.database_engine = database.engine self.db_pool = database + self.external_cached_functions: Dict[str, CachedFunction] = {} + def process_replication_rows( self, stream_name: str, @@ -95,7 +98,7 @@ class SQLBaseStore(metaclass=ABCMeta): def _attempt_to_invalidate_cache( self, cache_name: str, key: Optional[Collection[Any]] - ) -> None: + ) -> bool: """Attempts to invalidate the cache of the given name, ignoring if the cache doesn't exist. Mainly used for invalidating caches on workers, where they may not have the cache. @@ -113,9 +116,12 @@ class SQLBaseStore(metaclass=ABCMeta): try: cache = getattr(self, cache_name) except AttributeError: - # We probably haven't pulled in the cache in this worker, - # which is fine. - return + # Check if an externally defined module cache has been registered + cache = self.external_cached_functions.get(cache_name) + if not cache: + # We probably haven't pulled in the cache in this worker, + # which is fine. + return False if key is None: cache.invalidate_all() @@ -125,6 +131,13 @@ class SQLBaseStore(metaclass=ABCMeta): invalidate_method = getattr(cache, "invalidate_local", cache.invalidate) invalidate_method(tuple(key)) + return True + + def register_external_cached_function( + self, cache_name: str, func: CachedFunction + ) -> None: + self.external_cached_functions[cache_name] = func + def db_to_json(db_content: Union[memoryview, bytes, bytearray, str]) -> Any: """ diff --git a/synapse/storage/databases/main/cache.py b/synapse/storage/databases/main/cache.py index 12e9a42382..2c421151c1 100644 --- a/synapse/storage/databases/main/cache.py +++ b/synapse/storage/databases/main/cache.py @@ -33,7 +33,7 @@ from synapse.storage.database import ( ) from synapse.storage.engines import PostgresEngine from synapse.storage.util.id_generators import MultiWriterIdGenerator -from synapse.util.caches.descriptors import _CachedFunction +from synapse.util.caches.descriptors import CachedFunction from synapse.util.iterutils import batch_iter if TYPE_CHECKING: @@ -269,9 +269,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore): return cache_func.invalidate(keys) - await self.db_pool.runInteraction( - "invalidate_cache_and_stream", - self._send_invalidation_to_replication, + await self.send_invalidation_to_replication( cache_func.__name__, keys, ) @@ -279,7 +277,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore): def _invalidate_cache_and_stream( self, txn: LoggingTransaction, - cache_func: _CachedFunction, + cache_func: CachedFunction, keys: Tuple[Any, ...], ) -> None: """Invalidates the cache and adds it to the cache stream so slaves @@ -293,7 +291,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore): self._send_invalidation_to_replication(txn, cache_func.__name__, keys) def _invalidate_all_cache_and_stream( - self, txn: LoggingTransaction, cache_func: _CachedFunction + self, txn: LoggingTransaction, cache_func: CachedFunction ) -> None: """Invalidates the entire cache and adds it to the cache stream so slaves will know to invalidate their caches. @@ -334,6 +332,16 @@ class CacheInvalidationWorkerStore(SQLBaseStore): txn, CURRENT_STATE_CACHE_NAME, [room_id] ) + async def send_invalidation_to_replication( + self, cache_name: str, keys: Optional[Collection[Any]] + ) -> None: + await self.db_pool.runInteraction( + "send_invalidation_to_replication", + self._send_invalidation_to_replication, + cache_name, + keys, + ) + def _send_invalidation_to_replication( self, txn: LoggingTransaction, cache_name: str, keys: Optional[Iterable[Any]] ) -> None: diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py index 10aff4d04a..3909f1caea 100644 --- a/synapse/util/caches/descriptors.py +++ b/synapse/util/caches/descriptors.py @@ -53,7 +53,7 @@ CacheKey = Union[Tuple, Any] F = TypeVar("F", bound=Callable[..., Any]) -class _CachedFunction(Generic[F]): +class CachedFunction(Generic[F]): invalidate: Any = None invalidate_all: Any = None prefill: Any = None @@ -242,7 +242,7 @@ class LruCacheDescriptor(_CacheDescriptorBase): return ret2 - wrapped = cast(_CachedFunction, _wrapped) + wrapped = cast(CachedFunction, _wrapped) wrapped.cache = cache obj.__dict__[self.name] = wrapped @@ -363,7 +363,7 @@ class DeferredCacheDescriptor(_CacheDescriptorBase): return make_deferred_yieldable(ret) - wrapped = cast(_CachedFunction, _wrapped) + wrapped = cast(CachedFunction, _wrapped) if self.num_args == 1: assert not self.tree @@ -572,7 +572,7 @@ def cached( iterable: bool = False, prune_unread_entries: bool = True, name: Optional[str] = None, -) -> Callable[[F], _CachedFunction[F]]: +) -> Callable[[F], CachedFunction[F]]: func = lambda orig: DeferredCacheDescriptor( orig, max_entries=max_entries, @@ -585,7 +585,7 @@ def cached( name=name, ) - return cast(Callable[[F], _CachedFunction[F]], func) + return cast(Callable[[F], CachedFunction[F]], func) def cachedList( @@ -594,7 +594,7 @@ def cachedList( list_name: str, num_args: Optional[int] = None, name: Optional[str] = None, -) -> Callable[[F], _CachedFunction[F]]: +) -> Callable[[F], CachedFunction[F]]: """Creates a descriptor that wraps a function in a `DeferredCacheListDescriptor`. Used to do batch lookups for an already created cache. One of the arguments @@ -631,7 +631,7 @@ def cachedList( name=name, ) - return cast(Callable[[F], _CachedFunction[F]], func) + return cast(Callable[[F], CachedFunction[F]], func) def _get_cache_key_builder( diff --git a/tests/replication/test_module_cache_invalidation.py b/tests/replication/test_module_cache_invalidation.py new file mode 100644 index 0000000000..b93cae67d3 --- /dev/null +++ b/tests/replication/test_module_cache_invalidation.py @@ -0,0 +1,79 @@ +# Copyright 2022 The Matrix.org Foundation C.I.C. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +import logging + +import synapse +from synapse.module_api import cached + +from tests.replication._base import BaseMultiWorkerStreamTestCase + +logger = logging.getLogger(__name__) + +FIRST_VALUE = "one" +SECOND_VALUE = "two" + +KEY = "mykey" + + +class TestCache: + current_value = FIRST_VALUE + + @cached() + async def cached_function(self, user_id: str) -> str: + return self.current_value + + +class ModuleCacheInvalidationTestCase(BaseMultiWorkerStreamTestCase): + servlets = [ + synapse.rest.admin.register_servlets, + ] + + def test_module_cache_full_invalidation(self): + main_cache = TestCache() + self.hs.get_module_api().register_cached_function(main_cache.cached_function) + + worker_hs = self.make_worker_hs("synapse.app.generic_worker") + + worker_cache = TestCache() + worker_hs.get_module_api().register_cached_function( + worker_cache.cached_function + ) + + self.assertEqual(FIRST_VALUE, self.get_success(main_cache.cached_function(KEY))) + self.assertEqual( + FIRST_VALUE, self.get_success(worker_cache.cached_function(KEY)) + ) + + main_cache.current_value = SECOND_VALUE + worker_cache.current_value = SECOND_VALUE + # No invalidation yet, should return the cached value on both the main process and the worker + self.assertEqual(FIRST_VALUE, self.get_success(main_cache.cached_function(KEY))) + self.assertEqual( + FIRST_VALUE, self.get_success(worker_cache.cached_function(KEY)) + ) + + # Full invalidation on the main process, should be replicated on the worker that + # should returned the updated value too + self.get_success( + self.hs.get_module_api().invalidate_cache( + main_cache.cached_function, (KEY,) + ) + ) + + self.assertEqual( + SECOND_VALUE, self.get_success(main_cache.cached_function(KEY)) + ) + self.assertEqual( + SECOND_VALUE, self.get_success(worker_cache.cached_function(KEY)) + ) |