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Improvements to bundling aggregations. (#11815)

Browse Source 
This is some odds and ends found during the review of #11791
and while continuing to work in this code:

* Return attrs classes instead of dictionaries from some methods
  to improve type safety.
* Call `get_bundled_aggregations` fewer times.
* Adds a missing assertion in the tests.
* Do not return empty bundled aggregations for an event (preferring
  to not include the bundle at all, as the docstring states).
This commit is contained in:
Patrick Cloke 2022-01-26 08:27:04 -05:00 committed by GitHub
parent d8df8e6c14
commit 2897fb6b4f
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12 changed files with 212 additions and 139 deletions
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1
changelog.d/11815.misc Normal file
View File

@ -0,0 +1 @@
Improve type safety of bundled aggregations code.

57
synapse/events/utils.py
View File

@ -14,7 +14,17 @@
# limitations under the License.
import collections.abc
import re
from typing import Any, Callable, Dict, Iterable, List, Mapping, Optional, Union
from typing import (
TYPE_CHECKING,
Any,
Callable,
Dict,
Iterable,
List,
Mapping,
Optional,
Union,
)
from frozendict import frozendict
@ -26,6 +36,10 @@ from synapse.util.frozenutils import unfreeze
from . import EventBase
if TYPE_CHECKING:
from synapse.storage.databases.main.relations import BundledAggregations
# Split strings on "." but not "\." This uses a negative lookbehind assertion for '\'
# (?<!stuff) matches if the current position in the string is not preceded
# by a match for 'stuff'.
@ -376,7 +390,7 @@ class EventClientSerializer:
event: Union[JsonDict, EventBase],
time_now: int,
*,
bundle_aggregations: Optional[Dict[str, JsonDict]] = None,
bundle_aggregations: Optional[Dict[str, "BundledAggregations"]] = None,
**kwargs: Any,
) -> JsonDict:
"""Serializes a single event.
@ -415,7 +429,7 @@ class EventClientSerializer:
self,
event: EventBase,
time_now: int,
aggregations: JsonDict,
aggregations: "BundledAggregations",
serialized_event: JsonDict,
) -> None:
"""Potentially injects bundled aggregations into the unsigned portion of the serialized event.
@ -427,13 +441,18 @@ class EventClientSerializer:
serialized_event: The serialized event which may be modified.
"""
# Make a copy in-case the object is cached.
aggregations = aggregations.copy()
serialized_aggregations = {}
if RelationTypes.REPLACE in aggregations:
if aggregations.annotations:
serialized_aggregations[RelationTypes.ANNOTATION] = aggregations.annotations
if aggregations.references:
serialized_aggregations[RelationTypes.REFERENCE] = aggregations.references
if aggregations.replace:
# If there is an edit replace the content, preserving existing
# relations.
edit = aggregations[RelationTypes.REPLACE]
edit = aggregations.replace
# Ensure we take copies of the edit content, otherwise we risk modifying
# the original event.
@ -451,24 +470,28 @@ class EventClientSerializer:
else:
serialized_event["content"].pop("m.relates_to", None)
aggregations[RelationTypes.REPLACE] = {
serialized_aggregations[RelationTypes.REPLACE] = {
"event_id": edit.event_id,
"origin_server_ts": edit.origin_server_ts,
"sender": edit.sender,
}
# If this event is the start of a thread, include a summary of the replies.
if RelationTypes.THREAD in aggregations:
# Serialize the latest thread event.
latest_thread_event = aggregations[RelationTypes.THREAD]["latest_event"]
# Don't bundle aggregations as this could recurse forever.
aggregations[RelationTypes.THREAD]["latest_event"] = self.serialize_event(
latest_thread_event, time_now, bundle_aggregations=None
)
if aggregations.thread:
serialized_aggregations[RelationTypes.THREAD] = {
# Don't bundle aggregations as this could recurse forever.
"latest_event": self.serialize_event(
aggregations.thread.latest_event, time_now, bundle_aggregations=None
),
"count": aggregations.thread.count,
"current_user_participated": aggregations.thread.current_user_participated,
}
# Include the bundled aggregations in the event.
serialized_event["unsigned"].setdefault("m.relations", {}).update(aggregations)
if serialized_aggregations:
serialized_event["unsigned"].setdefault("m.relations", {}).update(
serialized_aggregations
)
def serialize_events(
self, events: Iterable[Union[JsonDict, EventBase]], time_now: int, **kwargs: Any

77
synapse/handlers/room.py
View File

@ -30,6 +30,7 @@ from typing import (
Tuple,
)
import attr
from typing_extensions import TypedDict
from synapse.api.constants import (
@ -60,6 +61,7 @@ from synapse.events.utils import copy_power_levels_contents
from synapse.federation.federation_client import InvalidResponseError
from synapse.handlers.federation import get_domains_from_state
from synapse.rest.admin._base import assert_user_is_admin
from synapse.storage.databases.main.relations import BundledAggregations
from synapse.storage.state import StateFilter
from synapse.streams import EventSource
from synapse.types import (
@ -90,6 +92,17 @@ id_server_scheme = "https://"
FIVE_MINUTES_IN_MS = 5 * 60 * 1000
@attr.s(slots=True, frozen=True, auto_attribs=True)
class EventContext:
events_before: List[EventBase]
event: EventBase
events_after: List[EventBase]
state: List[EventBase]
aggregations: Dict[str, BundledAggregations]
start: str
end: str
class RoomCreationHandler:
def __init__(self, hs: "HomeServer"):
self.store = hs.get_datastore()
@ -1119,7 +1132,7 @@ class RoomContextHandler:
limit: int,
event_filter: Optional[Filter],
use_admin_priviledge: bool = False,
) -> Optional[JsonDict]:
) -> Optional[EventContext]:
"""Retrieves events, pagination tokens and state around a given event
in a room.
@ -1167,38 +1180,28 @@ class RoomContextHandler:
results = await self.store.get_events_around(
room_id, event_id, before_limit, after_limit, event_filter
)
events_before = results.events_before
events_after = results.events_after
if event_filter:
results["events_before"] = await event_filter.filter(
results["events_before"]
)
results["events_after"] = await event_filter.filter(results["events_after"])
events_before = await event_filter.filter(events_before)
events_after = await event_filter.filter(events_after)
results["events_before"] = await filter_evts(results["events_before"])
results["events_after"] = await filter_evts(results["events_after"])
events_before = await filter_evts(events_before)
events_after = await filter_evts(events_after)
# filter_evts can return a pruned event in case the user is allowed to see that
# there's something there but not see the content, so use the event that's in
# `filtered` rather than the event we retrieved from the datastore.
results["event"] = filtered[0]
event = filtered[0]
# Fetch the aggregations.
aggregations = await self.store.get_bundled_aggregations(
[results["event"]], user.to_string()
itertools.chain(events_before, (event,), events_after),
user.to_string(),
)
aggregations.update(
await self.store.get_bundled_aggregations(
results["events_before"], user.to_string()
)
)
aggregations.update(
await self.store.get_bundled_aggregations(
results["events_after"], user.to_string()
)
)
results["aggregations"] = aggregations
if results["events_after"]:
last_event_id = results["events_after"][-1].event_id
if events_after:
last_event_id = events_after[-1].event_id
else:
last_event_id = event_id
@ -1206,9 +1209,9 @@ class RoomContextHandler:
state_filter = StateFilter.from_lazy_load_member_list(
ev.sender
for ev in itertools.chain(
results["events_before"],
(results["event"],),
results["events_after"],
events_before,
(event,),
events_after,
)
)
else:
@ -1226,21 +1229,23 @@ class RoomContextHandler:
if event_filter:
state_events = await event_filter.filter(state_events)
results["state"] = await filter_evts(state_events)
# We use a dummy token here as we only care about the room portion of
# the token, which we replace.
token = StreamToken.START
results["start"] = await token.copy_and_replace(
"room_key", results["start"]
).to_string(self.store)
results["end"] = await token.copy_and_replace(
"room_key", results["end"]
).to_string(self.store)
return results
return EventContext(
events_before=events_before,
event=event,
events_after=events_after,
state=await filter_evts(state_events),
aggregations=aggregations,
start=await token.copy_and_replace("room_key", results.start).to_string(
self.store
),
end=await token.copy_and_replace("room_key", results.end).to_string(
self.store
),
)
class TimestampLookupHandler:

45
synapse/handlers/search.py
View File

@ -361,36 +361,37 @@ class SearchHandler:
logger.info(
"Context for search returned %d and %d events",
len(res["events_before"]),
len(res["events_after"]),
len(res.events_before),
len(res.events_after),
)
res["events_before"] = await filter_events_for_client(
self.storage, user.to_string(), res["events_before"]
events_before = await filter_events_for_client(
self.storage, user.to_string(), res.events_before
)
res["events_after"] = await filter_events_for_client(
self.storage, user.to_string(), res["events_after"]
events_after = await filter_events_for_client(
self.storage, user.to_string(), res.events_after
)
res["start"] = await now_token.copy_and_replace(
"room_key", res["start"]
).to_string(self.store)
res["end"] = await now_token.copy_and_replace(
"room_key", res["end"]
).to_string(self.store)
context = {
"events_before": events_before,
"events_after": events_after,
"start": await now_token.copy_and_replace(
"room_key", res.start
).to_string(self.store),
"end": await now_token.copy_and_replace(
"room_key", res.end
).to_string(self.store),
}
if include_profile:
senders = {
ev.sender
for ev in itertools.chain(
res["events_before"], [event], res["events_after"]
)
for ev in itertools.chain(events_before, [event], events_after)
}
if res["events_after"]:
last_event_id = res["events_after"][-1].event_id
if events_after:
last_event_id = events_after[-1].event_id
else:
last_event_id = event.event_id
@ -402,7 +403,7 @@ class SearchHandler:
last_event_id, state_filter
)
res["profile_info"] = {
context["profile_info"] = {
s.state_key: {
"displayname": s.content.get("displayname", None),
"avatar_url": s.content.get("avatar_url", None),
@ -411,7 +412,7 @@ class SearchHandler:
if s.type == EventTypes.Member and s.state_key in senders
}
contexts[event.event_id] = res
contexts[event.event_id] = context
else:
contexts = {}
@ -421,10 +422,10 @@ class SearchHandler:
for context in contexts.values():
context["events_before"] = self._event_serializer.serialize_events(
context["events_before"], time_now
context["events_before"], time_now # type: ignore[arg-type]
)
context["events_after"] = self._event_serializer.serialize_events(
context["events_after"], time_now
context["events_after"], time_now # type: ignore[arg-type]
)
state_results = {}

3
synapse/handlers/sync.py
View File

@ -37,6 +37,7 @@ from synapse.logging.context import current_context
from synapse.logging.opentracing import SynapseTags, log_kv, set_tag, start_active_span
from synapse.push.clientformat import format_push_rules_for_user
from synapse.storage.databases.main.event_push_actions import NotifCounts
from synapse.storage.databases.main.relations import BundledAggregations
from synapse.storage.roommember import MemberSummary
from synapse.storage.state import StateFilter
from synapse.types import (
@ -100,7 +101,7 @@ class TimelineBatch:
limited: bool
# A mapping of event ID to the bundled aggregations for the above events.
# This is only calculated if limited is true.
bundled_aggregations: Optional[Dict[str, Dict[str, Any]]] = None
bundled_aggregations: Optional[Dict[str, BundledAggregations]] = None
def __bool__(self) -> bool:
"""Make the result appear empty if there are no updates. This is used

2
synapse/push/mailer.py
View File

@ -455,7 +455,7 @@ class Mailer:
}
the_events = await filter_events_for_client(
self.storage, user_id, results["events_before"]
self.storage, user_id, results.events_before
)
the_events.append(notif_event)

39
synapse/rest/admin/rooms.py
View File

@ -729,7 +729,7 @@ class RoomEventContextServlet(RestServlet):
else:
event_filter = None
results = await self.room_context_handler.get_event_context(
event_context = await self.room_context_handler.get_event_context(
requester,
room_id,
event_id,
@ -738,25 +738,34 @@ class RoomEventContextServlet(RestServlet):
use_admin_priviledge=True,
)
if not results:
if not event_context:
raise SynapseError(
HTTPStatus.NOT_FOUND, "Event not found.", errcode=Codes.NOT_FOUND
)
time_now = self.clock.time_msec()
aggregations = results.pop("aggregations", None)
results["events_before"] = self._event_serializer.serialize_events(
results["events_before"], time_now, bundle_aggregations=aggregations
)
results["event"] = self._event_serializer.serialize_event(
results["event"], time_now, bundle_aggregations=aggregations
)
results["events_after"] = self._event_serializer.serialize_events(
results["events_after"], time_now, bundle_aggregations=aggregations
)
results["state"] = self._event_serializer.serialize_events(
results["state"], time_now
)
results = {
"events_before": self._event_serializer.serialize_events(
event_context.events_before,
time_now,
bundle_aggregations=event_context.aggregations,
),
"event": self._event_serializer.serialize_event(
event_context.event,
time_now,
bundle_aggregations=event_context.aggregations,
),
"events_after": self._event_serializer.serialize_events(
event_context.events_after,
time_now,
bundle_aggregations=event_context.aggregations,
),
"state": self._event_serializer.serialize_events(
event_context.state, time_now
),
"start": event_context.start,
"end": event_context.end,
}
return HTTPStatus.OK, results

39
synapse/rest/client/room.py
View File

@ -706,27 +706,36 @@ class RoomEventContextServlet(RestServlet):
else:
event_filter = None
results = await self.room_context_handler.get_event_context(
event_context = await self.room_context_handler.get_event_context(
requester, room_id, event_id, limit, event_filter
)
if not results:
if not event_context:
raise SynapseError(404, "Event not found.", errcode=Codes.NOT_FOUND)
time_now = self.clock.time_msec()
aggregations = results.pop("aggregations", None)
results["events_before"] = self._event_serializer.serialize_events(
results["events_before"], time_now, bundle_aggregations=aggregations
)
results["event"] = self._event_serializer.serialize_event(
results["event"], time_now, bundle_aggregations=aggregations
)
results["events_after"] = self._event_serializer.serialize_events(
results["events_after"], time_now, bundle_aggregations=aggregations
)
results["state"] = self._event_serializer.serialize_events(
results["state"], time_now
)
results = {
"events_before": self._event_serializer.serialize_events(
event_context.events_before,
time_now,
bundle_aggregations=event_context.aggregations,
),
"event": self._event_serializer.serialize_event(
event_context.event,
time_now,
bundle_aggregations=event_context.aggregations,
),
"events_after": self._event_serializer.serialize_events(
event_context.events_after,
time_now,
bundle_aggregations=event_context.aggregations,
),
"state": self._event_serializer.serialize_events(
event_context.state, time_now
),
"start": event_context.start,
"end": event_context.end,
}
return 200, results

3
synapse/rest/client/sync.py
View File

@ -48,6 +48,7 @@ from synapse.http.server import HttpServer
from synapse.http.servlet import RestServlet, parse_boolean, parse_integer, parse_string
from synapse.http.site import SynapseRequest
from synapse.logging.opentracing import trace
from synapse.storage.databases.main.relations import BundledAggregations
from synapse.types import JsonDict, StreamToken
from synapse.util import json_decoder
@ -526,7 +527,7 @@ class SyncRestServlet(RestServlet):
def serialize(
events: Iterable[EventBase],
aggregations: Optional[Dict[str, Dict[str, Any]]] = None,
aggregations: Optional[Dict[str, BundledAggregations]] = None,
) -> List[JsonDict]:
return self._event_serializer.serialize_events(
events,

61
synapse/storage/databases/main/relations.py
View File

@ -13,17 +13,7 @@
# limitations under the License.
import logging
from typing import (
TYPE_CHECKING,
Any,
Dict,
Iterable,
List,
Optional,
Tuple,
Union,
cast,
)
from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Tuple, Union, cast
import attr
from frozendict import frozendict
@ -43,6 +33,7 @@ from synapse.storage.relations import (
PaginationChunk,
RelationPaginationToken,
)
from synapse.types import JsonDict
from synapse.util.caches.descriptors import cached
if TYPE_CHECKING:
@ -51,6 +42,30 @@ if TYPE_CHECKING:
logger = logging.getLogger(__name__)
@attr.s(slots=True, frozen=True, auto_attribs=True)
class _ThreadAggregation:
latest_event: EventBase
count: int
current_user_participated: bool
@attr.s(slots=True, auto_attribs=True)
class BundledAggregations:
"""
The bundled aggregations for an event.
Some values require additional processing during serialization.
"""
annotations: Optional[JsonDict] = None
references: Optional[JsonDict] = None
replace: Optional[EventBase] = None
thread: Optional[_ThreadAggregation] = None
def __bool__(self) -> bool:
return bool(self.annotations or self.references or self.replace or self.thread)
class RelationsWorkerStore(SQLBaseStore):
def __init__(
self,
@ -585,7 +600,7 @@ class RelationsWorkerStore(SQLBaseStore):
async def _get_bundled_aggregation_for_event(
self, event: EventBase, user_id: str
) -> Optional[Dict[str, Any]]:
) -> Optional[BundledAggregations]:
"""Generate bundled aggregations for an event.
Note that this does not use a cache, but depends on cached methods.
@ -616,24 +631,24 @@ class RelationsWorkerStore(SQLBaseStore):
# The bundled aggregations to include, a mapping of relation type to a
# type-specific value. Some types include the direct return type here
# while others need more processing during serialization.
aggregations: Dict[str, Any] = {}
aggregations = BundledAggregations()
annotations = await self.get_aggregation_groups_for_event(event_id, room_id)
if annotations.chunk:
aggregations[RelationTypes.ANNOTATION] = annotations.to_dict()
aggregations.annotations = annotations.to_dict()
references = await self.get_relations_for_event(
event_id, room_id, RelationTypes.REFERENCE, direction="f"
)
if references.chunk:
aggregations[RelationTypes.REFERENCE] = references.to_dict()
aggregations.references = references.to_dict()
edit = None
if event.type == EventTypes.Message:
edit = await self.get_applicable_edit(event_id, room_id)
if edit:
aggregations[RelationTypes.REPLACE] = edit
aggregations.replace = edit
# If this event is the start of a thread, include a summary of the replies.
if self._msc3440_enabled:
@ -644,11 +659,11 @@ class RelationsWorkerStore(SQLBaseStore):
event_id, room_id, user_id
)
if latest_thread_event:
aggregations[RelationTypes.THREAD] = {
"latest_event": latest_thread_event,
"count": thread_count,
"current_user_participated": participated,
}
aggregations.thread = _ThreadAggregation(
latest_event=latest_thread_event,
count=thread_count,
current_user_participated=participated,
)
# Store the bundled aggregations in the event metadata for later use.
return aggregations
@ -657,7 +672,7 @@ class RelationsWorkerStore(SQLBaseStore):
self,
events: Iterable[EventBase],
user_id: str,
) -> Dict[str, Dict[str, Any]]:
) -> Dict[str, BundledAggregations]:
"""Generate bundled aggregations for events.
Args:
@ -676,7 +691,7 @@ class RelationsWorkerStore(SQLBaseStore):
results = {}
for event in events:
event_result = await self._get_bundled_aggregation_for_event(event, user_id)
if event_result is not None:
if event_result:
results[event.event_id] = event_result
return results

22
synapse/storage/databases/main/stream.py
View File

@ -81,6 +81,14 @@ class _EventDictReturn:
stream_ordering: int
@attr.s(slots=True, frozen=True, auto_attribs=True)
class _EventsAround:
events_before: List[EventBase]
events_after: List[EventBase]
start: RoomStreamToken
end: RoomStreamToken
def generate_pagination_where_clause(
direction: str,
column_names: Tuple[str, str],
@ -846,7 +854,7 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
before_limit: int,
after_limit: int,
event_filter: Optional[Filter] = None,
) -> dict:
) -> _EventsAround:
"""Retrieve events and pagination tokens around a given event in a
room.
"""
@ -869,12 +877,12 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
list(results["after"]["event_ids"]), get_prev_content=True
)
return {
"events_before": events_before,
"events_after": events_after,
"start": results["before"]["token"],
"end": results["after"]["token"],
}
return _EventsAround(
events_before=events_before,
events_after=events_after,
start=results["before"]["token"],
end=results["after"]["token"],
)
def _get_events_around_txn(
self,

2
tests/rest/client/test_relations.py
View File

@ -577,7 +577,7 @@ class RelationsTestCase(unittest.HomeserverTestCase):
self.assertEquals(200, channel.code, channel.json_body)
room_timeline = channel.json_body["rooms"]["join"][self.room]["timeline"]
self.assertTrue(room_timeline["limited"])
self._find_event_in_chunk(room_timeline["events"])
assert_bundle(self._find_event_in_chunk(room_timeline["events"]))
def test_aggregation_get_event_for_annotation(self):
"""Test that annotations do not get bundled aggregations included