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Convert state delta processing from a dict to attrs. (#16469) 

For improved type checking & memory usage.
This commit is contained in:
Patrick Cloke 2023-10-16 07:35:22 -04:00 committed by GitHub
parent 4fe73f8f2f
commit e3e0ae4ab1
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8 changed files with 111 additions and 109 deletions
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1
changelog.d/16469.misc Normal file
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@ -0,0 +1 @@
Improve type hints.

32
synapse/handlers/presence.py
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@ -110,6 +110,7 @@ from synapse.replication.http.streams import ReplicationGetStreamUpdates
from synapse.replication.tcp.commands import ClearUserSyncsCommand
from synapse.replication.tcp.streams import PresenceFederationStream, PresenceStream
from synapse.storage.databases.main import DataStore
from synapse.storage.databases.main.state_deltas import StateDelta
from synapse.streams import EventSource
from synapse.types import (
JsonDict,
@ -1499,9 +1500,9 @@ class PresenceHandler(BasePresenceHandler):
# We may get multiple deltas for different rooms, but we want to
# handle them on a room by room basis, so we batch them up by
# room.
deltas_by_room: Dict[str, List[JsonDict]] = {}
deltas_by_room: Dict[str, List[StateDelta]] = {}
for delta in deltas:
deltas_by_room.setdefault(delta["room_id"], []).append(delta)
deltas_by_room.setdefault(delta.room_id, []).append(delta)
for room_id, deltas_for_room in deltas_by_room.items():
await self._handle_state_delta(room_id, deltas_for_room)
@ -1513,7 +1514,7 @@ class PresenceHandler(BasePresenceHandler):
max_pos
)
async def _handle_state_delta(self, room_id: str, deltas: List[JsonDict]) -> None:
async def _handle_state_delta(self, room_id: str, deltas: List[StateDelta]) -> None:
"""Process current state deltas for the room to find new joins that need
to be handled.
"""
@ -1524,31 +1525,30 @@ class PresenceHandler(BasePresenceHandler):
newly_joined_users = set()
for delta in deltas:
assert room_id == delta["room_id"]
assert room_id == delta.room_id
typ = delta["type"]
state_key = delta["state_key"]
event_id = delta["event_id"]
prev_event_id = delta["prev_event_id"]
logger.debug("Handling: %r %r, %s", typ, state_key, event_id)
logger.debug(
"Handling: %r %r, %s", delta.event_type, delta.state_key, delta.event_id
)
# Drop any event that isn't a membership join
if typ != EventTypes.Member:
if delta.event_type != EventTypes.Member:
continue
if event_id is None:
if delta.event_id is None:
# state has been deleted, so this is not a join. We only care about
# joins.
continue
event = await self.store.get_event(event_id, allow_none=True)
event = await self.store.get_event(delta.event_id, allow_none=True)
if not event or event.content.get("membership") != Membership.JOIN:
# We only care about joins
continue
if prev_event_id:
prev_event = await self.store.get_event(prev_event_id, allow_none=True)
if delta.prev_event_id:
prev_event = await self.store.get_event(
delta.prev_event_id, allow_none=True
)
if (
prev_event
and prev_event.content.get("membership") == Membership.JOIN
@ -1556,7 +1556,7 @@ class PresenceHandler(BasePresenceHandler):
# Ignore changes to join events.
continue
newly_joined_users.add(state_key)
newly_joined_users.add(delta.state_key)
if not newly_joined_users:
# If nobody has joined then there's nothing to do.

21
synapse/handlers/room_member.py
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@ -16,7 +16,7 @@ import abc
import logging
import random
from http import HTTPStatus
from typing import TYPE_CHECKING, Any, Dict, Iterable, List, Optional, Set, Tuple
from typing import TYPE_CHECKING, Iterable, List, Optional, Set, Tuple
from synapse import types
from synapse.api.constants import (
@ -44,6 +44,7 @@ from synapse.handlers.worker_lock import NEW_EVENT_DURING_PURGE_LOCK_NAME
from synapse.logging import opentracing
from synapse.metrics import event_processing_positions
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage.databases.main.state_deltas import StateDelta
from synapse.types import (
JsonDict,
Requester,
@ -2146,24 +2147,18 @@ class RoomForgetterHandler(StateDeltasHandler):
await self._store.update_room_forgetter_stream_pos(max_pos)
async def _handle_deltas(self, deltas: List[Dict[str, Any]]) -> None:
async def _handle_deltas(self, deltas: List[StateDelta]) -> None:
"""Called with the state deltas to process"""
for delta in deltas:
typ = delta["type"]
state_key = delta["state_key"]
room_id = delta["room_id"]
event_id = delta["event_id"]
prev_event_id = delta["prev_event_id"]
if typ != EventTypes.Member:
if delta.event_type != EventTypes.Member:
continue
if not self._hs.is_mine_id(state_key):
if not self._hs.is_mine_id(delta.state_key):
continue
change = await self._get_key_change(
prev_event_id,
event_id,
delta.prev_event_id,
delta.event_id,
key_name="membership",
public_value=Membership.JOIN,
)
@ -2172,7 +2167,7 @@ class RoomForgetterHandler(StateDeltasHandler):
if is_leave:
try:
await self._room_member_handler.forget(
UserID.from_string(state_key), room_id
UserID.from_string(delta.state_key), delta.room_id
)
except SynapseError as e:
if e.code == 400:

64
synapse/handlers/stats.py
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@ -27,6 +27,7 @@ from typing import (
from synapse.api.constants import EventContentFields, EventTypes, Membership
from synapse.metrics import event_processing_positions
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage.databases.main.state_deltas import StateDelta
from synapse.types import JsonDict
if TYPE_CHECKING:
@ -142,7 +143,7 @@ class StatsHandler:
self.pos = max_pos
async def _handle_deltas(
self, deltas: Iterable[JsonDict]
self, deltas: Iterable[StateDelta]
) -> Tuple[Dict[str, CounterType[str]], Dict[str, CounterType[str]]]:
"""Called with the state deltas to process
@ -157,51 +158,50 @@ class StatsHandler:
room_to_state_updates: Dict[str, Dict[str, Any]] = {}
for delta in deltas:
typ = delta["type"]
state_key = delta["state_key"]
room_id = delta["room_id"]
event_id = delta["event_id"]
stream_id = delta["stream_id"]
prev_event_id = delta["prev_event_id"]
logger.debug(
"Handling: %r, %r %r, %s",
delta.room_id,
delta.event_type,
delta.state_key,
delta.event_id,
)
logger.debug("Handling: %r, %r %r, %s", room_id, typ, state_key, event_id)
token = await self.store.get_earliest_token_for_stats("room", room_id)
token = await self.store.get_earliest_token_for_stats("room", delta.room_id)
# If the earliest token to begin from is larger than our current
# stream ID, skip processing this delta.
if token is not None and token >= stream_id:
if token is not None and token >= delta.stream_id:
logger.debug(
"Ignoring: %s as earlier than this room's initial ingestion event",
event_id,
delta.event_id,
)
continue
if event_id is None and prev_event_id is None:
if delta.event_id is None and delta.prev_event_id is None:
logger.error(
"event ID is None and so is the previous event ID. stream_id: %s",
stream_id,
delta.stream_id,
)
continue
event_content: JsonDict = {}
if event_id is not None:
event = await self.store.get_event(event_id, allow_none=True)
if delta.event_id is not None:
event = await self.store.get_event(delta.event_id, allow_none=True)
if event:
event_content = event.content or {}
# All the values in this dict are deltas (RELATIVE changes)
room_stats_delta = room_to_stats_deltas.setdefault(room_id, Counter())
room_stats_delta = room_to_stats_deltas.setdefault(delta.room_id, Counter())
room_state = room_to_state_updates.setdefault(room_id, {})
room_state = room_to_state_updates.setdefault(delta.room_id, {})
if prev_event_id is None:
if delta.prev_event_id is None:
# this state event doesn't overwrite another,
# so it is a new effective/current state event
room_stats_delta["current_state_events"] += 1
if typ == EventTypes.Member:
if delta.event_type == EventTypes.Member:
# we could use StateDeltasHandler._get_key_change here but it's
# a bit inefficient given we're not testing for a specific
# result; might as well just grab the prev_membership and
@ -210,9 +210,9 @@ class StatsHandler:
# in the absence of a previous event because we do not want to
# reduce the leave count when a new-to-the-room user joins.
prev_membership = None
if prev_event_id is not None:
if delta.prev_event_id is not None:
prev_event = await self.store.get_event(
prev_event_id, allow_none=True
delta.prev_event_id, allow_none=True
)
if prev_event:
prev_event_content = prev_event.content
@ -256,7 +256,7 @@ class StatsHandler:
else:
raise ValueError("%r is not a valid membership" % (membership,))
user_id = state_key
user_id = delta.state_key
if self.is_mine_id(user_id):
# this accounts for transitions like leave → ban and so on.
has_changed_joinedness = (prev_membership == Membership.JOIN) != (
@ -272,30 +272,30 @@ class StatsHandler:
room_stats_delta["local_users_in_room"] += membership_delta
elif typ == EventTypes.Create:
elif delta.event_type == EventTypes.Create:
room_state["is_federatable"] = (
event_content.get(EventContentFields.FEDERATE, True) is True
)
room_type = event_content.get(EventContentFields.ROOM_TYPE)
if isinstance(room_type, str):
room_state["room_type"] = room_type
elif typ == EventTypes.JoinRules:
elif delta.event_type == EventTypes.JoinRules:
room_state["join_rules"] = event_content.get("join_rule")
elif typ == EventTypes.RoomHistoryVisibility:
elif delta.event_type == EventTypes.RoomHistoryVisibility:
room_state["history_visibility"] = event_content.get(
"history_visibility"
)
elif typ == EventTypes.RoomEncryption:
elif delta.event_type == EventTypes.RoomEncryption:
room_state["encryption"] = event_content.get("algorithm")
elif typ == EventTypes.Name:
elif delta.event_type == EventTypes.Name:
room_state["name"] = event_content.get("name")
elif typ == EventTypes.Topic:
elif delta.event_type == EventTypes.Topic:
room_state["topic"] = event_content.get("topic")
elif typ == EventTypes.RoomAvatar:
elif delta.event_type == EventTypes.RoomAvatar:
room_state["avatar"] = event_content.get("url")
elif typ == EventTypes.CanonicalAlias:
elif delta.event_type == EventTypes.CanonicalAlias:
room_state["canonical_alias"] = event_content.get("alias")
elif typ == EventTypes.GuestAccess:
elif delta.event_type == EventTypes.GuestAccess:
room_state["guest_access"] = event_content.get(
EventContentFields.GUEST_ACCESS
)

34
synapse/handlers/user_directory.py
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@ -14,7 +14,7 @@
import logging
from http import HTTPStatus
from typing import TYPE_CHECKING, Any, Dict, List, Optional, Set, Tuple
from typing import TYPE_CHECKING, List, Optional, Set, Tuple
from twisted.internet.interfaces import IDelayedCall
@ -23,6 +23,7 @@ from synapse.api.constants import EventTypes, HistoryVisibility, JoinRules, Memb
from synapse.api.errors import Codes, SynapseError
from synapse.handlers.state_deltas import MatchChange, StateDeltasHandler
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage.databases.main.state_deltas import StateDelta
from synapse.storage.databases.main.user_directory import SearchResult
from synapse.storage.roommember import ProfileInfo
from synapse.types import UserID
@ -247,32 +248,31 @@ class UserDirectoryHandler(StateDeltasHandler):
await self.store.update_user_directory_stream_pos(max_pos)
async def _handle_deltas(self, deltas: List[Dict[str, Any]]) -> None:
async def _handle_deltas(self, deltas: List[StateDelta]) -> None:
"""Called with the state deltas to process"""
for delta in deltas:
typ = delta["type"]
state_key = delta["state_key"]
room_id = delta["room_id"]
event_id: Optional[str] = delta["event_id"]
prev_event_id: Optional[str] = delta["prev_event_id"]
logger.debug("Handling: %r %r, %s", typ, state_key, event_id)
logger.debug(
"Handling: %r %r, %s", delta.event_type, delta.state_key, delta.event_id
)
# For join rule and visibility changes we need to check if the room
# may have become public or not and add/remove the users in said room
if typ in (EventTypes.RoomHistoryVisibility, EventTypes.JoinRules):
if delta.event_type in (
EventTypes.RoomHistoryVisibility,
EventTypes.JoinRules,
):
await self._handle_room_publicity_change(
room_id, prev_event_id, event_id, typ
delta.room_id, delta.prev_event_id, delta.event_id, delta.event_type
)
elif typ == EventTypes.Member:
elif delta.event_type == EventTypes.Member:
await self._handle_room_membership_event(
room_id,
prev_event_id,
event_id,
state_key,
delta.room_id,
delta.prev_event_id,
delta.event_id,
delta.state_key,
)
else:
logger.debug("Ignoring irrelevant type: %r", typ)
logger.debug("Ignoring irrelevant type: %r", delta.event_type)
async def _handle_room_publicity_change(
self,

14
synapse/storage/controllers/state.py
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@ -16,7 +16,6 @@ from itertools import chain
from typing import (
TYPE_CHECKING,
AbstractSet,
Any,
Callable,
Collection,
Dict,
@ -32,6 +31,7 @@ from typing import (
from synapse.api.constants import EventTypes, Membership
from synapse.events import EventBase
from synapse.logging.opentracing import tag_args, trace
from synapse.storage.databases.main.state_deltas import StateDelta
from synapse.storage.roommember import ProfileInfo
from synapse.storage.util.partial_state_events_tracker import (
PartialCurrentStateTracker,
@ -531,19 +531,9 @@ class StateStorageController:
@tag_args
async def get_current_state_deltas(
self, prev_stream_id: int, max_stream_id: int
) -> Tuple[int, List[Dict[str, Any]]]:
) -> Tuple[int, List[StateDelta]]:
"""Fetch a list of room state changes since the given stream id
Each entry in the result contains the following fields:
- stream_id (int)
- room_id (str)
- type (str): event type
- state_key (str):
- event_id (str|None): new event_id for this state key. None if the
state has been deleted.
- prev_event_id (str|None): previous event_id for this state key. None
if it's new state.
Args:
prev_stream_id: point to get changes since (exclusive)
max_stream_id: the point that we know has been correctly persisted

44
synapse/storage/databases/main/state_deltas.py
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@ -13,7 +13,9 @@
# limitations under the License.
import logging
from typing import Any, Dict, List, Tuple
from typing import List, Optional, Tuple
import attr
from synapse.storage._base import SQLBaseStore
from synapse.storage.database import LoggingTransaction
@ -22,6 +24,20 @@ from synapse.util.caches.stream_change_cache import StreamChangeCache
logger = logging.getLogger(__name__)
@attr.s(slots=True, frozen=True, auto_attribs=True)
class StateDelta:
stream_id: int
room_id: str
event_type: str
state_key: str
event_id: Optional[str]
"""new event_id for this state key. None if the state has been deleted."""
prev_event_id: Optional[str]
"""previous event_id for this state key. None if it's new state."""
class StateDeltasStore(SQLBaseStore):
# This class must be mixed in with a child class which provides the following
# attribute. TODO: can we get static analysis to enforce this?
@ -29,19 +45,9 @@ class StateDeltasStore(SQLBaseStore):
async def get_partial_current_state_deltas(
self, prev_stream_id: int, max_stream_id: int
) -> Tuple[int, List[Dict[str, Any]]]:
) -> Tuple[int, List[StateDelta]]:
"""Fetch a list of room state changes since the given stream id
Each entry in the result contains the following fields:
- stream_id (int)
- room_id (str)
- type (str): event type
- state_key (str):
- event_id (str|None): new event_id for this state key. None if the
state has been deleted.
- prev_event_id (str|None): previous event_id for this state key. None
if it's new state.
This may be the partial state if we're lazy joining the room.
Args:
@ -72,7 +78,7 @@ class StateDeltasStore(SQLBaseStore):
def get_current_state_deltas_txn(
txn: LoggingTransaction,
) -> Tuple[int, List[Dict[str, Any]]]:
) -> Tuple[int, List[StateDelta]]:
# First we calculate the max stream id that will give us less than
# N results.
# We arbitrarily limit to 100 stream_id entries to ensure we don't
@ -112,7 +118,17 @@ class StateDeltasStore(SQLBaseStore):
ORDER BY stream_id ASC
"""
txn.execute(sql, (prev_stream_id, clipped_stream_id))
return clipped_stream_id, self.db_pool.cursor_to_dict(txn)
return clipped_stream_id, [
StateDelta(
stream_id=row[0],
room_id=row[1],
event_type=row[2],
state_key=row[3],
event_id=row[4],
prev_event_id=row[5],
)
for row in txn.fetchall()
]
return await self.db_pool.runInteraction(
"get_current_state_deltas", get_current_state_deltas_txn

2
tests/handlers/test_typing.py
View File

@ -174,7 +174,7 @@ class TypingNotificationsTestCase(unittest.HomeserverTestCase):
return_value=1
)
self.datastore.get_partial_current_state_deltas = Mock(return_value=(0, None)) # type: ignore[method-assign]
self.datastore.get_partial_current_state_deltas = Mock(return_value=(0, [])) # type: ignore[method-assign]
self.datastore.get_to_device_stream_token = Mock( # type: ignore[method-assign]
return_value=0