1889 lines
71 KiB
Python
1889 lines
71 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018-2019 New Vector Ltd
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import itertools
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import logging
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from collections import Counter as c_counter, OrderedDict, namedtuple
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from functools import wraps
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from typing import Dict, List, Tuple
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from six import iteritems, text_type
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from six.moves import range
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from canonicaljson import json
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from prometheus_client import Counter
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from twisted.internet import defer
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import synapse.metrics
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from synapse.api.constants import EventContentFields, EventTypes
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from synapse.api.errors import SynapseError
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from synapse.api.room_versions import RoomVersions
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from synapse.events import EventBase # noqa: F401
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from synapse.events.snapshot import EventContext # noqa: F401
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from synapse.events.utils import prune_event_dict
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from synapse.logging.utils import log_function
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from synapse.metrics import BucketCollector
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from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.storage._base import make_in_list_sql_clause
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from synapse.storage.data_stores.main.event_federation import EventFederationStore
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from synapse.storage.data_stores.main.events_worker import EventsWorkerStore
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from synapse.storage.data_stores.main.state import StateGroupWorkerStore
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from synapse.storage.database import Database, LoggingTransaction
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from synapse.storage.persist_events import DeltaState
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from synapse.types import RoomStreamToken, StateMap, get_domain_from_id
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from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
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from synapse.util.frozenutils import frozendict_json_encoder
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from synapse.util.iterutils import batch_iter
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logger = logging.getLogger(__name__)
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persist_event_counter = Counter("synapse_storage_events_persisted_events", "")
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event_counter = Counter(
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"synapse_storage_events_persisted_events_sep",
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"",
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["type", "origin_type", "origin_entity"],
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)
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def encode_json(json_object):
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"""
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Encode a Python object as JSON and return it in a Unicode string.
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"""
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out = frozendict_json_encoder.encode(json_object)
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if isinstance(out, bytes):
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out = out.decode("utf8")
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return out
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_EventCacheEntry = namedtuple("_EventCacheEntry", ("event", "redacted_event"))
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def _retry_on_integrity_error(func):
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"""Wraps a database function so that it gets retried on IntegrityError,
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with `delete_existing=True` passed in.
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Args:
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func: function that returns a Deferred and accepts a `delete_existing` arg
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"""
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@wraps(func)
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@defer.inlineCallbacks
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def f(self, *args, **kwargs):
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try:
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res = yield func(self, *args, delete_existing=False, **kwargs)
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except self.database_engine.module.IntegrityError:
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logger.exception("IntegrityError, retrying.")
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res = yield func(self, *args, delete_existing=True, **kwargs)
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return res
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return f
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# inherits from EventFederationStore so that we can call _update_backward_extremities
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# and _handle_mult_prev_events (though arguably those could both be moved in here)
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class EventsStore(
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StateGroupWorkerStore, EventFederationStore, EventsWorkerStore,
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):
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def __init__(self, database: Database, db_conn, hs):
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super(EventsStore, self).__init__(database, db_conn, hs)
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# Collect metrics on the number of forward extremities that exist.
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# Counter of number of extremities to count
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self._current_forward_extremities_amount = c_counter()
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BucketCollector(
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"synapse_forward_extremities",
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lambda: self._current_forward_extremities_amount,
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buckets=[1, 2, 3, 5, 7, 10, 15, 20, 50, 100, 200, 500, "+Inf"],
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)
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# Read the extrems every 60 minutes
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def read_forward_extremities():
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# run as a background process to make sure that the database transactions
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# have a logcontext to report to
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return run_as_background_process(
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"read_forward_extremities", self._read_forward_extremities
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)
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hs.get_clock().looping_call(read_forward_extremities, 60 * 60 * 1000)
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def _censor_redactions():
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return run_as_background_process(
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"_censor_redactions", self._censor_redactions
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)
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if self.hs.config.redaction_retention_period is not None:
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hs.get_clock().looping_call(_censor_redactions, 5 * 60 * 1000)
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self._ephemeral_messages_enabled = hs.config.enable_ephemeral_messages
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self.is_mine_id = hs.is_mine_id
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@defer.inlineCallbacks
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def _read_forward_extremities(self):
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def fetch(txn):
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txn.execute(
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"""
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select count(*) c from event_forward_extremities
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group by room_id
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"""
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)
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return txn.fetchall()
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res = yield self.db.runInteraction("read_forward_extremities", fetch)
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self._current_forward_extremities_amount = c_counter([x[0] for x in res])
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@_retry_on_integrity_error
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@defer.inlineCallbacks
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def _persist_events_and_state_updates(
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self,
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events_and_contexts: List[Tuple[EventBase, EventContext]],
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current_state_for_room: Dict[str, StateMap[str]],
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state_delta_for_room: Dict[str, DeltaState],
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new_forward_extremeties: Dict[str, List[str]],
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backfilled: bool = False,
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delete_existing: bool = False,
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):
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"""Persist a set of events alongside updates to the current state and
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forward extremities tables.
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Args:
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events_and_contexts:
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current_state_for_room: Map from room_id to the current state of
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the room based on forward extremities
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state_delta_for_room: Map from room_id to the delta to apply to
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room state
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new_forward_extremities: Map from room_id to list of event IDs
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that are the new forward extremities of the room.
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backfilled
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delete_existing
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Returns:
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Deferred: resolves when the events have been persisted
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"""
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# We want to calculate the stream orderings as late as possible, as
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# we only notify after all events with a lesser stream ordering have
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# been persisted. I.e. if we spend 10s inside the with block then
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# that will delay all subsequent events from being notified about.
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# Hence why we do it down here rather than wrapping the entire
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# function.
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#
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# Its safe to do this after calculating the state deltas etc as we
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# only need to protect the *persistence* of the events. This is to
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# ensure that queries of the form "fetch events since X" don't
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# return events and stream positions after events that are still in
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# flight, as otherwise subsequent requests "fetch event since Y"
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# will not return those events.
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#
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# Note: Multiple instances of this function cannot be in flight at
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# the same time for the same room.
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if backfilled:
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stream_ordering_manager = self._backfill_id_gen.get_next_mult(
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len(events_and_contexts)
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)
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else:
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stream_ordering_manager = self._stream_id_gen.get_next_mult(
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len(events_and_contexts)
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)
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with stream_ordering_manager as stream_orderings:
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for (event, context), stream in zip(events_and_contexts, stream_orderings):
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event.internal_metadata.stream_ordering = stream
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yield self.db.runInteraction(
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"persist_events",
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self._persist_events_txn,
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events_and_contexts=events_and_contexts,
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backfilled=backfilled,
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delete_existing=delete_existing,
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state_delta_for_room=state_delta_for_room,
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new_forward_extremeties=new_forward_extremeties,
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)
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persist_event_counter.inc(len(events_and_contexts))
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if not backfilled:
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# backfilled events have negative stream orderings, so we don't
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# want to set the event_persisted_position to that.
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synapse.metrics.event_persisted_position.set(
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events_and_contexts[-1][0].internal_metadata.stream_ordering
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)
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for event, context in events_and_contexts:
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if context.app_service:
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origin_type = "local"
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origin_entity = context.app_service.id
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elif self.hs.is_mine_id(event.sender):
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origin_type = "local"
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origin_entity = "*client*"
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else:
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origin_type = "remote"
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origin_entity = get_domain_from_id(event.sender)
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event_counter.labels(event.type, origin_type, origin_entity).inc()
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for room_id, new_state in iteritems(current_state_for_room):
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self.get_current_state_ids.prefill((room_id,), new_state)
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for room_id, latest_event_ids in iteritems(new_forward_extremeties):
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self.get_latest_event_ids_in_room.prefill(
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(room_id,), list(latest_event_ids)
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)
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@defer.inlineCallbacks
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def _get_events_which_are_prevs(self, event_ids):
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"""Filter the supplied list of event_ids to get those which are prev_events of
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existing (non-outlier/rejected) events.
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Args:
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event_ids (Iterable[str]): event ids to filter
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Returns:
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Deferred[List[str]]: filtered event ids
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"""
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results = []
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def _get_events_which_are_prevs_txn(txn, batch):
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sql = """
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SELECT prev_event_id, internal_metadata
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FROM event_edges
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INNER JOIN events USING (event_id)
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LEFT JOIN rejections USING (event_id)
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LEFT JOIN event_json USING (event_id)
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WHERE
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NOT events.outlier
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AND rejections.event_id IS NULL
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AND
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"""
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clause, args = make_in_list_sql_clause(
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self.database_engine, "prev_event_id", batch
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)
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txn.execute(sql + clause, args)
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results.extend(r[0] for r in txn if not json.loads(r[1]).get("soft_failed"))
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for chunk in batch_iter(event_ids, 100):
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yield self.db.runInteraction(
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"_get_events_which_are_prevs", _get_events_which_are_prevs_txn, chunk
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)
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return results
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@defer.inlineCallbacks
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def _get_prevs_before_rejected(self, event_ids):
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"""Get soft-failed ancestors to remove from the extremities.
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Given a set of events, find all those that have been soft-failed or
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rejected. Returns those soft failed/rejected events and their prev
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events (whether soft-failed/rejected or not), and recurses up the
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prev-event graph until it finds no more soft-failed/rejected events.
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This is used to find extremities that are ancestors of new events, but
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are separated by soft failed events.
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Args:
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event_ids (Iterable[str]): Events to find prev events for. Note
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that these must have already been persisted.
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Returns:
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Deferred[set[str]]
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"""
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# The set of event_ids to return. This includes all soft-failed events
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# and their prev events.
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existing_prevs = set()
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def _get_prevs_before_rejected_txn(txn, batch):
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to_recursively_check = batch
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while to_recursively_check:
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sql = """
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SELECT
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event_id, prev_event_id, internal_metadata,
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rejections.event_id IS NOT NULL
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FROM event_edges
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INNER JOIN events USING (event_id)
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LEFT JOIN rejections USING (event_id)
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LEFT JOIN event_json USING (event_id)
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WHERE
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NOT events.outlier
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AND
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"""
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clause, args = make_in_list_sql_clause(
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self.database_engine, "event_id", to_recursively_check
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)
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txn.execute(sql + clause, args)
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to_recursively_check = []
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for event_id, prev_event_id, metadata, rejected in txn:
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if prev_event_id in existing_prevs:
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continue
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soft_failed = json.loads(metadata).get("soft_failed")
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if soft_failed or rejected:
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to_recursively_check.append(prev_event_id)
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existing_prevs.add(prev_event_id)
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for chunk in batch_iter(event_ids, 100):
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yield self.db.runInteraction(
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"_get_prevs_before_rejected", _get_prevs_before_rejected_txn, chunk
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)
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return existing_prevs
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@log_function
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def _persist_events_txn(
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self,
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txn: LoggingTransaction,
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events_and_contexts: List[Tuple[EventBase, EventContext]],
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backfilled: bool,
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delete_existing: bool = False,
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state_delta_for_room: Dict[str, DeltaState] = {},
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new_forward_extremeties: Dict[str, List[str]] = {},
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):
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"""Insert some number of room events into the necessary database tables.
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Rejected events are only inserted into the events table, the events_json table,
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and the rejections table. Things reading from those table will need to check
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whether the event was rejected.
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Args:
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txn
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events_and_contexts: events to persist
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backfilled: True if the events were backfilled
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delete_existing True to purge existing table rows for the events
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from the database. This is useful when retrying due to
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IntegrityError.
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state_delta_for_room: The current-state delta for each room.
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new_forward_extremetie: The new forward extremities for each room.
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For each room, a list of the event ids which are the forward
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extremities.
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"""
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all_events_and_contexts = events_and_contexts
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min_stream_order = events_and_contexts[0][0].internal_metadata.stream_ordering
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max_stream_order = events_and_contexts[-1][0].internal_metadata.stream_ordering
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self._update_forward_extremities_txn(
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txn,
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new_forward_extremities=new_forward_extremeties,
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max_stream_order=max_stream_order,
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)
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# Ensure that we don't have the same event twice.
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events_and_contexts = self._filter_events_and_contexts_for_duplicates(
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events_and_contexts
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)
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self._update_room_depths_txn(
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txn, events_and_contexts=events_and_contexts, backfilled=backfilled
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)
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# _update_outliers_txn filters out any events which have already been
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# persisted, and returns the filtered list.
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events_and_contexts = self._update_outliers_txn(
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txn, events_and_contexts=events_and_contexts
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)
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# From this point onwards the events are only events that we haven't
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# seen before.
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if delete_existing:
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# For paranoia reasons, we go and delete all the existing entries
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# for these events so we can reinsert them.
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# This gets around any problems with some tables already having
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# entries.
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self._delete_existing_rows_txn(txn, events_and_contexts=events_and_contexts)
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self._store_event_txn(txn, events_and_contexts=events_and_contexts)
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# Insert into event_to_state_groups.
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self._store_event_state_mappings_txn(txn, events_and_contexts)
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# We want to store event_auth mappings for rejected events, as they're
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# used in state res v2.
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# This is only necessary if the rejected event appears in an accepted
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# event's auth chain, but its easier for now just to store them (and
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# it doesn't take much storage compared to storing the entire event
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# anyway).
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self.db.simple_insert_many_txn(
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txn,
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table="event_auth",
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values=[
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{
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"event_id": event.event_id,
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"room_id": event.room_id,
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"auth_id": auth_id,
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}
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for event, _ in events_and_contexts
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for auth_id in event.auth_event_ids()
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if event.is_state()
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],
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)
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# _store_rejected_events_txn filters out any events which were
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# rejected, and returns the filtered list.
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events_and_contexts = self._store_rejected_events_txn(
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txn, events_and_contexts=events_and_contexts
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)
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# From this point onwards the events are only ones that weren't
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# rejected.
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self._update_metadata_tables_txn(
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txn,
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events_and_contexts=events_and_contexts,
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all_events_and_contexts=all_events_and_contexts,
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backfilled=backfilled,
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)
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# We call this last as it assumes we've inserted the events into
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# room_memberships, where applicable.
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self._update_current_state_txn(txn, state_delta_for_room, min_stream_order)
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def _update_current_state_txn(
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self,
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txn: LoggingTransaction,
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state_delta_by_room: Dict[str, DeltaState],
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stream_id: int,
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):
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for room_id, delta_state in iteritems(state_delta_by_room):
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to_delete = delta_state.to_delete
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to_insert = delta_state.to_insert
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if delta_state.no_longer_in_room:
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# Server is no longer in the room so we delete the room from
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# current_state_events, being careful we've already updated the
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# rooms.room_version column (which gets populated in a
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# background task).
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self._upsert_room_version_txn(txn, room_id)
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# Before deleting we populate the current_state_delta_stream
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# so that async background tasks get told what happened.
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sql = """
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INSERT INTO current_state_delta_stream
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(stream_id, room_id, type, state_key, event_id, prev_event_id)
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SELECT ?, room_id, type, state_key, null, event_id
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FROM current_state_events
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WHERE room_id = ?
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"""
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txn.execute(sql, (stream_id, room_id))
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self.db.simple_delete_txn(
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txn, table="current_state_events", keyvalues={"room_id": room_id},
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)
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else:
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# We're still in the room, so we update the current state as normal.
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|
# First we add entries to the current_state_delta_stream. We
|
|
# do this before updating the current_state_events table so
|
|
# that we can use it to calculate the `prev_event_id`. (This
|
|
# allows us to not have to pull out the existing state
|
|
# unnecessarily).
|
|
#
|
|
# The stream_id for the update is chosen to be the minimum of the stream_ids
|
|
# for the batch of the events that we are persisting; that means we do not
|
|
# end up in a situation where workers see events before the
|
|
# current_state_delta updates.
|
|
#
|
|
sql = """
|
|
INSERT INTO current_state_delta_stream
|
|
(stream_id, room_id, type, state_key, event_id, prev_event_id)
|
|
SELECT ?, ?, ?, ?, ?, (
|
|
SELECT event_id FROM current_state_events
|
|
WHERE room_id = ? AND type = ? AND state_key = ?
|
|
)
|
|
"""
|
|
txn.executemany(
|
|
sql,
|
|
(
|
|
(
|
|
stream_id,
|
|
room_id,
|
|
etype,
|
|
state_key,
|
|
to_insert.get((etype, state_key)),
|
|
room_id,
|
|
etype,
|
|
state_key,
|
|
)
|
|
for etype, state_key in itertools.chain(to_delete, to_insert)
|
|
),
|
|
)
|
|
# Now we actually update the current_state_events table
|
|
|
|
txn.executemany(
|
|
"DELETE FROM current_state_events"
|
|
" WHERE room_id = ? AND type = ? AND state_key = ?",
|
|
(
|
|
(room_id, etype, state_key)
|
|
for etype, state_key in itertools.chain(to_delete, to_insert)
|
|
),
|
|
)
|
|
|
|
# We include the membership in the current state table, hence we do
|
|
# a lookup when we insert. This assumes that all events have already
|
|
# been inserted into room_memberships.
|
|
txn.executemany(
|
|
"""INSERT INTO current_state_events
|
|
(room_id, type, state_key, event_id, membership)
|
|
VALUES (?, ?, ?, ?, (SELECT membership FROM room_memberships WHERE event_id = ?))
|
|
""",
|
|
[
|
|
(room_id, key[0], key[1], ev_id, ev_id)
|
|
for key, ev_id in iteritems(to_insert)
|
|
],
|
|
)
|
|
|
|
# We now update `local_current_membership`. We do this regardless
|
|
# of whether we're still in the room or not to handle the case where
|
|
# e.g. we just got banned (where we need to record that fact here).
|
|
|
|
# Note: Do we really want to delete rows here (that we do not
|
|
# subsequently reinsert below)? While technically correct it means
|
|
# we have no record of the fact the user *was* a member of the
|
|
# room but got, say, state reset out of it.
|
|
if to_delete or to_insert:
|
|
txn.executemany(
|
|
"DELETE FROM local_current_membership"
|
|
" WHERE room_id = ? AND user_id = ?",
|
|
(
|
|
(room_id, state_key)
|
|
for etype, state_key in itertools.chain(to_delete, to_insert)
|
|
if etype == EventTypes.Member and self.is_mine_id(state_key)
|
|
),
|
|
)
|
|
|
|
if to_insert:
|
|
txn.executemany(
|
|
"""INSERT INTO local_current_membership
|
|
(room_id, user_id, event_id, membership)
|
|
VALUES (?, ?, ?, (SELECT membership FROM room_memberships WHERE event_id = ?))
|
|
""",
|
|
[
|
|
(room_id, key[1], ev_id, ev_id)
|
|
for key, ev_id in to_insert.items()
|
|
if key[0] == EventTypes.Member and self.is_mine_id(key[1])
|
|
],
|
|
)
|
|
|
|
txn.call_after(
|
|
self._curr_state_delta_stream_cache.entity_has_changed,
|
|
room_id,
|
|
stream_id,
|
|
)
|
|
|
|
# Invalidate the various caches
|
|
|
|
# Figure out the changes of membership to invalidate the
|
|
# `get_rooms_for_user` cache.
|
|
# We find out which membership events we may have deleted
|
|
# and which we have added, then we invlidate the caches for all
|
|
# those users.
|
|
members_changed = {
|
|
state_key
|
|
for ev_type, state_key in itertools.chain(to_delete, to_insert)
|
|
if ev_type == EventTypes.Member
|
|
}
|
|
|
|
for member in members_changed:
|
|
txn.call_after(
|
|
self.get_rooms_for_user_with_stream_ordering.invalidate, (member,)
|
|
)
|
|
|
|
self._invalidate_state_caches_and_stream(txn, room_id, members_changed)
|
|
|
|
def _upsert_room_version_txn(self, txn: LoggingTransaction, room_id: str):
|
|
"""Update the room version in the database based off current state
|
|
events.
|
|
|
|
This is used when we're about to delete current state and we want to
|
|
ensure that the `rooms.room_version` column is up to date.
|
|
"""
|
|
|
|
sql = """
|
|
SELECT json FROM event_json
|
|
INNER JOIN current_state_events USING (room_id, event_id)
|
|
WHERE room_id = ? AND type = ? AND state_key = ?
|
|
"""
|
|
txn.execute(sql, (room_id, EventTypes.Create, ""))
|
|
row = txn.fetchone()
|
|
if row:
|
|
event_json = json.loads(row[0])
|
|
content = event_json.get("content", {})
|
|
creator = content.get("creator")
|
|
room_version_id = content.get("room_version", RoomVersions.V1.identifier)
|
|
|
|
self.db.simple_upsert_txn(
|
|
txn,
|
|
table="rooms",
|
|
keyvalues={"room_id": room_id},
|
|
values={"room_version": room_version_id},
|
|
insertion_values={"is_public": False, "creator": creator},
|
|
)
|
|
|
|
def _update_forward_extremities_txn(
|
|
self, txn, new_forward_extremities, max_stream_order
|
|
):
|
|
for room_id, new_extrem in iteritems(new_forward_extremities):
|
|
self.db.simple_delete_txn(
|
|
txn, table="event_forward_extremities", keyvalues={"room_id": room_id}
|
|
)
|
|
txn.call_after(self.get_latest_event_ids_in_room.invalidate, (room_id,))
|
|
|
|
self.db.simple_insert_many_txn(
|
|
txn,
|
|
table="event_forward_extremities",
|
|
values=[
|
|
{"event_id": ev_id, "room_id": room_id}
|
|
for room_id, new_extrem in iteritems(new_forward_extremities)
|
|
for ev_id in new_extrem
|
|
],
|
|
)
|
|
# We now insert into stream_ordering_to_exterm a mapping from room_id,
|
|
# new stream_ordering to new forward extremeties in the room.
|
|
# This allows us to later efficiently look up the forward extremeties
|
|
# for a room before a given stream_ordering
|
|
self.db.simple_insert_many_txn(
|
|
txn,
|
|
table="stream_ordering_to_exterm",
|
|
values=[
|
|
{
|
|
"room_id": room_id,
|
|
"event_id": event_id,
|
|
"stream_ordering": max_stream_order,
|
|
}
|
|
for room_id, new_extrem in iteritems(new_forward_extremities)
|
|
for event_id in new_extrem
|
|
],
|
|
)
|
|
|
|
@classmethod
|
|
def _filter_events_and_contexts_for_duplicates(cls, events_and_contexts):
|
|
"""Ensure that we don't have the same event twice.
|
|
|
|
Pick the earliest non-outlier if there is one, else the earliest one.
|
|
|
|
Args:
|
|
events_and_contexts (list[(EventBase, EventContext)]):
|
|
Returns:
|
|
list[(EventBase, EventContext)]: filtered list
|
|
"""
|
|
new_events_and_contexts = OrderedDict()
|
|
for event, context in events_and_contexts:
|
|
prev_event_context = new_events_and_contexts.get(event.event_id)
|
|
if prev_event_context:
|
|
if not event.internal_metadata.is_outlier():
|
|
if prev_event_context[0].internal_metadata.is_outlier():
|
|
# To ensure correct ordering we pop, as OrderedDict is
|
|
# ordered by first insertion.
|
|
new_events_and_contexts.pop(event.event_id, None)
|
|
new_events_and_contexts[event.event_id] = (event, context)
|
|
else:
|
|
new_events_and_contexts[event.event_id] = (event, context)
|
|
return list(new_events_and_contexts.values())
|
|
|
|
def _update_room_depths_txn(self, txn, events_and_contexts, backfilled):
|
|
"""Update min_depth for each room
|
|
|
|
Args:
|
|
txn (twisted.enterprise.adbapi.Connection): db connection
|
|
events_and_contexts (list[(EventBase, EventContext)]): events
|
|
we are persisting
|
|
backfilled (bool): True if the events were backfilled
|
|
"""
|
|
depth_updates = {}
|
|
for event, context in events_and_contexts:
|
|
# Remove the any existing cache entries for the event_ids
|
|
txn.call_after(self._invalidate_get_event_cache, event.event_id)
|
|
if not backfilled:
|
|
txn.call_after(
|
|
self._events_stream_cache.entity_has_changed,
|
|
event.room_id,
|
|
event.internal_metadata.stream_ordering,
|
|
)
|
|
|
|
if not event.internal_metadata.is_outlier() and not context.rejected:
|
|
depth_updates[event.room_id] = max(
|
|
event.depth, depth_updates.get(event.room_id, event.depth)
|
|
)
|
|
|
|
for room_id, depth in iteritems(depth_updates):
|
|
self._update_min_depth_for_room_txn(txn, room_id, depth)
|
|
|
|
def _update_outliers_txn(self, txn, events_and_contexts):
|
|
"""Update any outliers with new event info.
|
|
|
|
This turns outliers into ex-outliers (unless the new event was
|
|
rejected).
|
|
|
|
Args:
|
|
txn (twisted.enterprise.adbapi.Connection): db connection
|
|
events_and_contexts (list[(EventBase, EventContext)]): events
|
|
we are persisting
|
|
|
|
Returns:
|
|
list[(EventBase, EventContext)] new list, without events which
|
|
are already in the events table.
|
|
"""
|
|
txn.execute(
|
|
"SELECT event_id, outlier FROM events WHERE event_id in (%s)"
|
|
% (",".join(["?"] * len(events_and_contexts)),),
|
|
[event.event_id for event, _ in events_and_contexts],
|
|
)
|
|
|
|
have_persisted = {event_id: outlier for event_id, outlier in txn}
|
|
|
|
to_remove = set()
|
|
for event, context in events_and_contexts:
|
|
if event.event_id not in have_persisted:
|
|
continue
|
|
|
|
to_remove.add(event)
|
|
|
|
if context.rejected:
|
|
# If the event is rejected then we don't care if the event
|
|
# was an outlier or not.
|
|
continue
|
|
|
|
outlier_persisted = have_persisted[event.event_id]
|
|
if not event.internal_metadata.is_outlier() and outlier_persisted:
|
|
# We received a copy of an event that we had already stored as
|
|
# an outlier in the database. We now have some state at that
|
|
# so we need to update the state_groups table with that state.
|
|
|
|
# insert into event_to_state_groups.
|
|
try:
|
|
self._store_event_state_mappings_txn(txn, ((event, context),))
|
|
except Exception:
|
|
logger.exception("")
|
|
raise
|
|
|
|
metadata_json = encode_json(event.internal_metadata.get_dict())
|
|
|
|
sql = "UPDATE event_json SET internal_metadata = ? WHERE event_id = ?"
|
|
txn.execute(sql, (metadata_json, event.event_id))
|
|
|
|
# Add an entry to the ex_outlier_stream table to replicate the
|
|
# change in outlier status to our workers.
|
|
stream_order = event.internal_metadata.stream_ordering
|
|
state_group_id = context.state_group
|
|
self.db.simple_insert_txn(
|
|
txn,
|
|
table="ex_outlier_stream",
|
|
values={
|
|
"event_stream_ordering": stream_order,
|
|
"event_id": event.event_id,
|
|
"state_group": state_group_id,
|
|
},
|
|
)
|
|
|
|
sql = "UPDATE events SET outlier = ? WHERE event_id = ?"
|
|
txn.execute(sql, (False, event.event_id))
|
|
|
|
# Update the event_backward_extremities table now that this
|
|
# event isn't an outlier any more.
|
|
self._update_backward_extremeties(txn, [event])
|
|
|
|
return [ec for ec in events_and_contexts if ec[0] not in to_remove]
|
|
|
|
@classmethod
|
|
def _delete_existing_rows_txn(cls, txn, events_and_contexts):
|
|
if not events_and_contexts:
|
|
# nothing to do here
|
|
return
|
|
|
|
logger.info("Deleting existing")
|
|
|
|
for table in (
|
|
"events",
|
|
"event_auth",
|
|
"event_json",
|
|
"event_edges",
|
|
"event_forward_extremities",
|
|
"event_reference_hashes",
|
|
"event_search",
|
|
"event_to_state_groups",
|
|
"local_invites",
|
|
"state_events",
|
|
"rejections",
|
|
"redactions",
|
|
"room_memberships",
|
|
):
|
|
txn.executemany(
|
|
"DELETE FROM %s WHERE event_id = ?" % (table,),
|
|
[(ev.event_id,) for ev, _ in events_and_contexts],
|
|
)
|
|
|
|
for table in ("event_push_actions",):
|
|
txn.executemany(
|
|
"DELETE FROM %s WHERE room_id = ? AND event_id = ?" % (table,),
|
|
[(ev.room_id, ev.event_id) for ev, _ in events_and_contexts],
|
|
)
|
|
|
|
def _store_event_txn(self, txn, events_and_contexts):
|
|
"""Insert new events into the event and event_json tables
|
|
|
|
Args:
|
|
txn (twisted.enterprise.adbapi.Connection): db connection
|
|
events_and_contexts (list[(EventBase, EventContext)]): events
|
|
we are persisting
|
|
"""
|
|
|
|
if not events_and_contexts:
|
|
# nothing to do here
|
|
return
|
|
|
|
def event_dict(event):
|
|
d = event.get_dict()
|
|
d.pop("redacted", None)
|
|
d.pop("redacted_because", None)
|
|
return d
|
|
|
|
self.db.simple_insert_many_txn(
|
|
txn,
|
|
table="event_json",
|
|
values=[
|
|
{
|
|
"event_id": event.event_id,
|
|
"room_id": event.room_id,
|
|
"internal_metadata": encode_json(
|
|
event.internal_metadata.get_dict()
|
|
),
|
|
"json": encode_json(event_dict(event)),
|
|
"format_version": event.format_version,
|
|
}
|
|
for event, _ in events_and_contexts
|
|
],
|
|
)
|
|
|
|
self.db.simple_insert_many_txn(
|
|
txn,
|
|
table="events",
|
|
values=[
|
|
{
|
|
"stream_ordering": event.internal_metadata.stream_ordering,
|
|
"topological_ordering": event.depth,
|
|
"depth": event.depth,
|
|
"event_id": event.event_id,
|
|
"room_id": event.room_id,
|
|
"type": event.type,
|
|
"processed": True,
|
|
"outlier": event.internal_metadata.is_outlier(),
|
|
"origin_server_ts": int(event.origin_server_ts),
|
|
"received_ts": self._clock.time_msec(),
|
|
"sender": event.sender,
|
|
"contains_url": (
|
|
"url" in event.content
|
|
and isinstance(event.content["url"], text_type)
|
|
),
|
|
}
|
|
for event, _ in events_and_contexts
|
|
],
|
|
)
|
|
|
|
for event, _ in events_and_contexts:
|
|
if not event.internal_metadata.is_redacted():
|
|
# If we're persisting an unredacted event we go and ensure
|
|
# that we mark any redactions that reference this event as
|
|
# requiring censoring.
|
|
self.db.simple_update_txn(
|
|
txn,
|
|
table="redactions",
|
|
keyvalues={"redacts": event.event_id},
|
|
updatevalues={"have_censored": False},
|
|
)
|
|
|
|
def _store_rejected_events_txn(self, txn, events_and_contexts):
|
|
"""Add rows to the 'rejections' table for received events which were
|
|
rejected
|
|
|
|
Args:
|
|
txn (twisted.enterprise.adbapi.Connection): db connection
|
|
events_and_contexts (list[(EventBase, EventContext)]): events
|
|
we are persisting
|
|
|
|
Returns:
|
|
list[(EventBase, EventContext)] new list, without the rejected
|
|
events.
|
|
"""
|
|
# Remove the rejected events from the list now that we've added them
|
|
# to the events table and the events_json table.
|
|
to_remove = set()
|
|
for event, context in events_and_contexts:
|
|
if context.rejected:
|
|
# Insert the event_id into the rejections table
|
|
self._store_rejections_txn(txn, event.event_id, context.rejected)
|
|
to_remove.add(event)
|
|
|
|
return [ec for ec in events_and_contexts if ec[0] not in to_remove]
|
|
|
|
def _update_metadata_tables_txn(
|
|
self, txn, events_and_contexts, all_events_and_contexts, backfilled
|
|
):
|
|
"""Update all the miscellaneous tables for new events
|
|
|
|
Args:
|
|
txn (twisted.enterprise.adbapi.Connection): db connection
|
|
events_and_contexts (list[(EventBase, EventContext)]): events
|
|
we are persisting
|
|
all_events_and_contexts (list[(EventBase, EventContext)]): all
|
|
events that we were going to persist. This includes events
|
|
we've already persisted, etc, that wouldn't appear in
|
|
events_and_context.
|
|
backfilled (bool): True if the events were backfilled
|
|
"""
|
|
|
|
# Insert all the push actions into the event_push_actions table.
|
|
self._set_push_actions_for_event_and_users_txn(
|
|
txn,
|
|
events_and_contexts=events_and_contexts,
|
|
all_events_and_contexts=all_events_and_contexts,
|
|
)
|
|
|
|
if not events_and_contexts:
|
|
# nothing to do here
|
|
return
|
|
|
|
for event, context in events_and_contexts:
|
|
if event.type == EventTypes.Redaction and event.redacts is not None:
|
|
# Remove the entries in the event_push_actions table for the
|
|
# redacted event.
|
|
self._remove_push_actions_for_event_id_txn(
|
|
txn, event.room_id, event.redacts
|
|
)
|
|
|
|
# Remove from relations table.
|
|
self._handle_redaction(txn, event.redacts)
|
|
|
|
# Update the event_forward_extremities, event_backward_extremities and
|
|
# event_edges tables.
|
|
self._handle_mult_prev_events(
|
|
txn, events=[event for event, _ in events_and_contexts]
|
|
)
|
|
|
|
for event, _ in events_and_contexts:
|
|
if event.type == EventTypes.Name:
|
|
# Insert into the event_search table.
|
|
self._store_room_name_txn(txn, event)
|
|
elif event.type == EventTypes.Topic:
|
|
# Insert into the event_search table.
|
|
self._store_room_topic_txn(txn, event)
|
|
elif event.type == EventTypes.Message:
|
|
# Insert into the event_search table.
|
|
self._store_room_message_txn(txn, event)
|
|
elif event.type == EventTypes.Redaction and event.redacts is not None:
|
|
# Insert into the redactions table.
|
|
self._store_redaction(txn, event)
|
|
elif event.type == EventTypes.Retention:
|
|
# Update the room_retention table.
|
|
self._store_retention_policy_for_room_txn(txn, event)
|
|
|
|
self._handle_event_relations(txn, event)
|
|
|
|
# Store the labels for this event.
|
|
labels = event.content.get(EventContentFields.LABELS)
|
|
if labels:
|
|
self.insert_labels_for_event_txn(
|
|
txn, event.event_id, labels, event.room_id, event.depth
|
|
)
|
|
|
|
if self._ephemeral_messages_enabled:
|
|
# If there's an expiry timestamp on the event, store it.
|
|
expiry_ts = event.content.get(EventContentFields.SELF_DESTRUCT_AFTER)
|
|
if isinstance(expiry_ts, int) and not event.is_state():
|
|
self._insert_event_expiry_txn(txn, event.event_id, expiry_ts)
|
|
|
|
# Insert into the room_memberships table.
|
|
self._store_room_members_txn(
|
|
txn,
|
|
[
|
|
event
|
|
for event, _ in events_and_contexts
|
|
if event.type == EventTypes.Member
|
|
],
|
|
backfilled=backfilled,
|
|
)
|
|
|
|
# Insert event_reference_hashes table.
|
|
self._store_event_reference_hashes_txn(
|
|
txn, [event for event, _ in events_and_contexts]
|
|
)
|
|
|
|
state_events_and_contexts = [
|
|
ec for ec in events_and_contexts if ec[0].is_state()
|
|
]
|
|
|
|
state_values = []
|
|
for event, context in state_events_and_contexts:
|
|
vals = {
|
|
"event_id": event.event_id,
|
|
"room_id": event.room_id,
|
|
"type": event.type,
|
|
"state_key": event.state_key,
|
|
}
|
|
|
|
# TODO: How does this work with backfilling?
|
|
if hasattr(event, "replaces_state"):
|
|
vals["prev_state"] = event.replaces_state
|
|
|
|
state_values.append(vals)
|
|
|
|
self.db.simple_insert_many_txn(txn, table="state_events", values=state_values)
|
|
|
|
# Prefill the event cache
|
|
self._add_to_cache(txn, events_and_contexts)
|
|
|
|
def _add_to_cache(self, txn, events_and_contexts):
|
|
to_prefill = []
|
|
|
|
rows = []
|
|
N = 200
|
|
for i in range(0, len(events_and_contexts), N):
|
|
ev_map = {e[0].event_id: e[0] for e in events_and_contexts[i : i + N]}
|
|
if not ev_map:
|
|
break
|
|
|
|
sql = (
|
|
"SELECT "
|
|
" e.event_id as event_id, "
|
|
" r.redacts as redacts,"
|
|
" rej.event_id as rejects "
|
|
" FROM events as e"
|
|
" LEFT JOIN rejections as rej USING (event_id)"
|
|
" LEFT JOIN redactions as r ON e.event_id = r.redacts"
|
|
" WHERE "
|
|
)
|
|
|
|
clause, args = make_in_list_sql_clause(
|
|
self.database_engine, "e.event_id", list(ev_map)
|
|
)
|
|
|
|
txn.execute(sql + clause, args)
|
|
rows = self.db.cursor_to_dict(txn)
|
|
for row in rows:
|
|
event = ev_map[row["event_id"]]
|
|
if not row["rejects"] and not row["redacts"]:
|
|
to_prefill.append(
|
|
_EventCacheEntry(event=event, redacted_event=None)
|
|
)
|
|
|
|
def prefill():
|
|
for cache_entry in to_prefill:
|
|
self._get_event_cache.prefill((cache_entry[0].event_id,), cache_entry)
|
|
|
|
txn.call_after(prefill)
|
|
|
|
def _store_redaction(self, txn, event):
|
|
# invalidate the cache for the redacted event
|
|
txn.call_after(self._invalidate_get_event_cache, event.redacts)
|
|
|
|
self.db.simple_insert_txn(
|
|
txn,
|
|
table="redactions",
|
|
values={
|
|
"event_id": event.event_id,
|
|
"redacts": event.redacts,
|
|
"received_ts": self._clock.time_msec(),
|
|
},
|
|
)
|
|
|
|
async def _censor_redactions(self):
|
|
"""Censors all redactions older than the configured period that haven't
|
|
been censored yet.
|
|
|
|
By censor we mean update the event_json table with the redacted event.
|
|
"""
|
|
|
|
if self.hs.config.redaction_retention_period is None:
|
|
return
|
|
|
|
if not (
|
|
await self.db.updates.has_completed_background_update(
|
|
"redactions_have_censored_ts_idx"
|
|
)
|
|
):
|
|
# We don't want to run this until the appropriate index has been
|
|
# created.
|
|
return
|
|
|
|
before_ts = self._clock.time_msec() - self.hs.config.redaction_retention_period
|
|
|
|
# We fetch all redactions that:
|
|
# 1. point to an event we have,
|
|
# 2. has a received_ts from before the cut off, and
|
|
# 3. we haven't yet censored.
|
|
#
|
|
# This is limited to 100 events to ensure that we don't try and do too
|
|
# much at once. We'll get called again so this should eventually catch
|
|
# up.
|
|
sql = """
|
|
SELECT redactions.event_id, redacts FROM redactions
|
|
LEFT JOIN events AS original_event ON (
|
|
redacts = original_event.event_id
|
|
)
|
|
WHERE NOT have_censored
|
|
AND redactions.received_ts <= ?
|
|
ORDER BY redactions.received_ts ASC
|
|
LIMIT ?
|
|
"""
|
|
|
|
rows = await self.db.execute(
|
|
"_censor_redactions_fetch", None, sql, before_ts, 100
|
|
)
|
|
|
|
updates = []
|
|
|
|
for redaction_id, event_id in rows:
|
|
redaction_event = await self.get_event(redaction_id, allow_none=True)
|
|
original_event = await self.get_event(
|
|
event_id, allow_rejected=True, allow_none=True
|
|
)
|
|
|
|
# The SQL above ensures that we have both the redaction and
|
|
# original event, so if the `get_event` calls return None it
|
|
# means that the redaction wasn't allowed. Either way we know that
|
|
# the result won't change so we mark the fact that we've checked.
|
|
if (
|
|
redaction_event
|
|
and original_event
|
|
and original_event.internal_metadata.is_redacted()
|
|
):
|
|
# Redaction was allowed
|
|
pruned_json = encode_json(
|
|
prune_event_dict(
|
|
original_event.room_version, original_event.get_dict()
|
|
)
|
|
)
|
|
else:
|
|
# Redaction wasn't allowed
|
|
pruned_json = None
|
|
|
|
updates.append((redaction_id, event_id, pruned_json))
|
|
|
|
def _update_censor_txn(txn):
|
|
for redaction_id, event_id, pruned_json in updates:
|
|
if pruned_json:
|
|
self._censor_event_txn(txn, event_id, pruned_json)
|
|
|
|
self.db.simple_update_one_txn(
|
|
txn,
|
|
table="redactions",
|
|
keyvalues={"event_id": redaction_id},
|
|
updatevalues={"have_censored": True},
|
|
)
|
|
|
|
await self.db.runInteraction("_update_censor_txn", _update_censor_txn)
|
|
|
|
def _censor_event_txn(self, txn, event_id, pruned_json):
|
|
"""Censor an event by replacing its JSON in the event_json table with the
|
|
provided pruned JSON.
|
|
|
|
Args:
|
|
txn (LoggingTransaction): The database transaction.
|
|
event_id (str): The ID of the event to censor.
|
|
pruned_json (str): The pruned JSON
|
|
"""
|
|
self.db.simple_update_one_txn(
|
|
txn,
|
|
table="event_json",
|
|
keyvalues={"event_id": event_id},
|
|
updatevalues={"json": pruned_json},
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def count_daily_messages(self):
|
|
"""
|
|
Returns an estimate of the number of messages sent in the last day.
|
|
|
|
If it has been significantly less or more than one day since the last
|
|
call to this function, it will return None.
|
|
"""
|
|
|
|
def _count_messages(txn):
|
|
sql = """
|
|
SELECT COALESCE(COUNT(*), 0) FROM events
|
|
WHERE type = 'm.room.message'
|
|
AND stream_ordering > ?
|
|
"""
|
|
txn.execute(sql, (self.stream_ordering_day_ago,))
|
|
(count,) = txn.fetchone()
|
|
return count
|
|
|
|
ret = yield self.db.runInteraction("count_messages", _count_messages)
|
|
return ret
|
|
|
|
@defer.inlineCallbacks
|
|
def count_daily_sent_messages(self):
|
|
def _count_messages(txn):
|
|
# This is good enough as if you have silly characters in your own
|
|
# hostname then thats your own fault.
|
|
like_clause = "%:" + self.hs.hostname
|
|
|
|
sql = """
|
|
SELECT COALESCE(COUNT(*), 0) FROM events
|
|
WHERE type = 'm.room.message'
|
|
AND sender LIKE ?
|
|
AND stream_ordering > ?
|
|
"""
|
|
|
|
txn.execute(sql, (like_clause, self.stream_ordering_day_ago))
|
|
(count,) = txn.fetchone()
|
|
return count
|
|
|
|
ret = yield self.db.runInteraction("count_daily_sent_messages", _count_messages)
|
|
return ret
|
|
|
|
@defer.inlineCallbacks
|
|
def count_daily_active_rooms(self):
|
|
def _count(txn):
|
|
sql = """
|
|
SELECT COALESCE(COUNT(DISTINCT room_id), 0) FROM events
|
|
WHERE type = 'm.room.message'
|
|
AND stream_ordering > ?
|
|
"""
|
|
txn.execute(sql, (self.stream_ordering_day_ago,))
|
|
(count,) = txn.fetchone()
|
|
return count
|
|
|
|
ret = yield self.db.runInteraction("count_daily_active_rooms", _count)
|
|
return ret
|
|
|
|
@cached(num_args=5, max_entries=10)
|
|
def get_all_new_events(
|
|
self,
|
|
last_backfill_id,
|
|
last_forward_id,
|
|
current_backfill_id,
|
|
current_forward_id,
|
|
limit,
|
|
):
|
|
"""Get all the new events that have arrived at the server either as
|
|
new events or as backfilled events"""
|
|
have_backfill_events = last_backfill_id != current_backfill_id
|
|
have_forward_events = last_forward_id != current_forward_id
|
|
|
|
if not have_backfill_events and not have_forward_events:
|
|
return defer.succeed(AllNewEventsResult([], [], [], [], []))
|
|
|
|
def get_all_new_events_txn(txn):
|
|
sql = (
|
|
"SELECT e.stream_ordering, e.event_id, e.room_id, e.type,"
|
|
" state_key, redacts"
|
|
" FROM events AS e"
|
|
" LEFT JOIN redactions USING (event_id)"
|
|
" LEFT JOIN state_events USING (event_id)"
|
|
" WHERE ? < stream_ordering AND stream_ordering <= ?"
|
|
" ORDER BY stream_ordering ASC"
|
|
" LIMIT ?"
|
|
)
|
|
if have_forward_events:
|
|
txn.execute(sql, (last_forward_id, current_forward_id, limit))
|
|
new_forward_events = txn.fetchall()
|
|
|
|
if len(new_forward_events) == limit:
|
|
upper_bound = new_forward_events[-1][0]
|
|
else:
|
|
upper_bound = current_forward_id
|
|
|
|
sql = (
|
|
"SELECT event_stream_ordering, event_id, state_group"
|
|
" FROM ex_outlier_stream"
|
|
" WHERE ? > event_stream_ordering"
|
|
" AND event_stream_ordering >= ?"
|
|
" ORDER BY event_stream_ordering DESC"
|
|
)
|
|
txn.execute(sql, (last_forward_id, upper_bound))
|
|
forward_ex_outliers = txn.fetchall()
|
|
else:
|
|
new_forward_events = []
|
|
forward_ex_outliers = []
|
|
|
|
sql = (
|
|
"SELECT -e.stream_ordering, e.event_id, e.room_id, e.type,"
|
|
" state_key, redacts"
|
|
" FROM events AS e"
|
|
" LEFT JOIN redactions USING (event_id)"
|
|
" LEFT JOIN state_events USING (event_id)"
|
|
" WHERE ? > stream_ordering AND stream_ordering >= ?"
|
|
" ORDER BY stream_ordering DESC"
|
|
" LIMIT ?"
|
|
)
|
|
if have_backfill_events:
|
|
txn.execute(sql, (-last_backfill_id, -current_backfill_id, limit))
|
|
new_backfill_events = txn.fetchall()
|
|
|
|
if len(new_backfill_events) == limit:
|
|
upper_bound = new_backfill_events[-1][0]
|
|
else:
|
|
upper_bound = current_backfill_id
|
|
|
|
sql = (
|
|
"SELECT -event_stream_ordering, event_id, state_group"
|
|
" FROM ex_outlier_stream"
|
|
" WHERE ? > event_stream_ordering"
|
|
" AND event_stream_ordering >= ?"
|
|
" ORDER BY event_stream_ordering DESC"
|
|
)
|
|
txn.execute(sql, (-last_backfill_id, -upper_bound))
|
|
backward_ex_outliers = txn.fetchall()
|
|
else:
|
|
new_backfill_events = []
|
|
backward_ex_outliers = []
|
|
|
|
return AllNewEventsResult(
|
|
new_forward_events,
|
|
new_backfill_events,
|
|
forward_ex_outliers,
|
|
backward_ex_outliers,
|
|
)
|
|
|
|
return self.db.runInteraction("get_all_new_events", get_all_new_events_txn)
|
|
|
|
def purge_history(self, room_id, token, delete_local_events):
|
|
"""Deletes room history before a certain point
|
|
|
|
Args:
|
|
room_id (str):
|
|
|
|
token (str): A topological token to delete events before
|
|
|
|
delete_local_events (bool):
|
|
if True, we will delete local events as well as remote ones
|
|
(instead of just marking them as outliers and deleting their
|
|
state groups).
|
|
|
|
Returns:
|
|
Deferred[set[int]]: The set of state groups that are referenced by
|
|
deleted events.
|
|
"""
|
|
|
|
return self.db.runInteraction(
|
|
"purge_history",
|
|
self._purge_history_txn,
|
|
room_id,
|
|
token,
|
|
delete_local_events,
|
|
)
|
|
|
|
def _purge_history_txn(self, txn, room_id, token_str, delete_local_events):
|
|
token = RoomStreamToken.parse(token_str)
|
|
|
|
# Tables that should be pruned:
|
|
# event_auth
|
|
# event_backward_extremities
|
|
# event_edges
|
|
# event_forward_extremities
|
|
# event_json
|
|
# event_push_actions
|
|
# event_reference_hashes
|
|
# event_search
|
|
# event_to_state_groups
|
|
# events
|
|
# rejections
|
|
# room_depth
|
|
# state_groups
|
|
# state_groups_state
|
|
|
|
# we will build a temporary table listing the events so that we don't
|
|
# have to keep shovelling the list back and forth across the
|
|
# connection. Annoyingly the python sqlite driver commits the
|
|
# transaction on CREATE, so let's do this first.
|
|
#
|
|
# furthermore, we might already have the table from a previous (failed)
|
|
# purge attempt, so let's drop the table first.
|
|
|
|
txn.execute("DROP TABLE IF EXISTS events_to_purge")
|
|
|
|
txn.execute(
|
|
"CREATE TEMPORARY TABLE events_to_purge ("
|
|
" event_id TEXT NOT NULL,"
|
|
" should_delete BOOLEAN NOT NULL"
|
|
")"
|
|
)
|
|
|
|
# First ensure that we're not about to delete all the forward extremeties
|
|
txn.execute(
|
|
"SELECT e.event_id, e.depth FROM events as e "
|
|
"INNER JOIN event_forward_extremities as f "
|
|
"ON e.event_id = f.event_id "
|
|
"AND e.room_id = f.room_id "
|
|
"WHERE f.room_id = ?",
|
|
(room_id,),
|
|
)
|
|
rows = txn.fetchall()
|
|
max_depth = max(row[1] for row in rows)
|
|
|
|
if max_depth < token.topological:
|
|
# We need to ensure we don't delete all the events from the database
|
|
# otherwise we wouldn't be able to send any events (due to not
|
|
# having any backwards extremeties)
|
|
raise SynapseError(
|
|
400, "topological_ordering is greater than forward extremeties"
|
|
)
|
|
|
|
logger.info("[purge] looking for events to delete")
|
|
|
|
should_delete_expr = "state_key IS NULL"
|
|
should_delete_params = ()
|
|
if not delete_local_events:
|
|
should_delete_expr += " AND event_id NOT LIKE ?"
|
|
|
|
# We include the parameter twice since we use the expression twice
|
|
should_delete_params += ("%:" + self.hs.hostname, "%:" + self.hs.hostname)
|
|
|
|
should_delete_params += (room_id, token.topological)
|
|
|
|
# Note that we insert events that are outliers and aren't going to be
|
|
# deleted, as nothing will happen to them.
|
|
txn.execute(
|
|
"INSERT INTO events_to_purge"
|
|
" SELECT event_id, %s"
|
|
" FROM events AS e LEFT JOIN state_events USING (event_id)"
|
|
" WHERE (NOT outlier OR (%s)) AND e.room_id = ? AND topological_ordering < ?"
|
|
% (should_delete_expr, should_delete_expr),
|
|
should_delete_params,
|
|
)
|
|
|
|
# We create the indices *after* insertion as that's a lot faster.
|
|
|
|
# create an index on should_delete because later we'll be looking for
|
|
# the should_delete / shouldn't_delete subsets
|
|
txn.execute(
|
|
"CREATE INDEX events_to_purge_should_delete"
|
|
" ON events_to_purge(should_delete)"
|
|
)
|
|
|
|
# We do joins against events_to_purge for e.g. calculating state
|
|
# groups to purge, etc., so lets make an index.
|
|
txn.execute("CREATE INDEX events_to_purge_id ON events_to_purge(event_id)")
|
|
|
|
txn.execute("SELECT event_id, should_delete FROM events_to_purge")
|
|
event_rows = txn.fetchall()
|
|
logger.info(
|
|
"[purge] found %i events before cutoff, of which %i can be deleted",
|
|
len(event_rows),
|
|
sum(1 for e in event_rows if e[1]),
|
|
)
|
|
|
|
logger.info("[purge] Finding new backward extremities")
|
|
|
|
# We calculate the new entries for the backward extremeties by finding
|
|
# events to be purged that are pointed to by events we're not going to
|
|
# purge.
|
|
txn.execute(
|
|
"SELECT DISTINCT e.event_id FROM events_to_purge AS e"
|
|
" INNER JOIN event_edges AS ed ON e.event_id = ed.prev_event_id"
|
|
" LEFT JOIN events_to_purge AS ep2 ON ed.event_id = ep2.event_id"
|
|
" WHERE ep2.event_id IS NULL"
|
|
)
|
|
new_backwards_extrems = txn.fetchall()
|
|
|
|
logger.info("[purge] replacing backward extremities: %r", new_backwards_extrems)
|
|
|
|
txn.execute(
|
|
"DELETE FROM event_backward_extremities WHERE room_id = ?", (room_id,)
|
|
)
|
|
|
|
# Update backward extremeties
|
|
txn.executemany(
|
|
"INSERT INTO event_backward_extremities (room_id, event_id)"
|
|
" VALUES (?, ?)",
|
|
[(room_id, event_id) for event_id, in new_backwards_extrems],
|
|
)
|
|
|
|
logger.info("[purge] finding state groups referenced by deleted events")
|
|
|
|
# Get all state groups that are referenced by events that are to be
|
|
# deleted.
|
|
txn.execute(
|
|
"""
|
|
SELECT DISTINCT state_group FROM events_to_purge
|
|
INNER JOIN event_to_state_groups USING (event_id)
|
|
"""
|
|
)
|
|
|
|
referenced_state_groups = {sg for sg, in txn}
|
|
logger.info(
|
|
"[purge] found %i referenced state groups", len(referenced_state_groups)
|
|
)
|
|
|
|
logger.info("[purge] removing events from event_to_state_groups")
|
|
txn.execute(
|
|
"DELETE FROM event_to_state_groups "
|
|
"WHERE event_id IN (SELECT event_id from events_to_purge)"
|
|
)
|
|
for event_id, _ in event_rows:
|
|
txn.call_after(self._get_state_group_for_event.invalidate, (event_id,))
|
|
|
|
# Delete all remote non-state events
|
|
for table in (
|
|
"events",
|
|
"event_json",
|
|
"event_auth",
|
|
"event_edges",
|
|
"event_forward_extremities",
|
|
"event_reference_hashes",
|
|
"event_search",
|
|
"rejections",
|
|
):
|
|
logger.info("[purge] removing events from %s", table)
|
|
|
|
txn.execute(
|
|
"DELETE FROM %s WHERE event_id IN ("
|
|
" SELECT event_id FROM events_to_purge WHERE should_delete"
|
|
")" % (table,)
|
|
)
|
|
|
|
# event_push_actions lacks an index on event_id, and has one on
|
|
# (room_id, event_id) instead.
|
|
for table in ("event_push_actions",):
|
|
logger.info("[purge] removing events from %s", table)
|
|
|
|
txn.execute(
|
|
"DELETE FROM %s WHERE room_id = ? AND event_id IN ("
|
|
" SELECT event_id FROM events_to_purge WHERE should_delete"
|
|
")" % (table,),
|
|
(room_id,),
|
|
)
|
|
|
|
# Mark all state and own events as outliers
|
|
logger.info("[purge] marking remaining events as outliers")
|
|
txn.execute(
|
|
"UPDATE events SET outlier = ?"
|
|
" WHERE event_id IN ("
|
|
" SELECT event_id FROM events_to_purge "
|
|
" WHERE NOT should_delete"
|
|
")",
|
|
(True,),
|
|
)
|
|
|
|
# synapse tries to take out an exclusive lock on room_depth whenever it
|
|
# persists events (because upsert), and once we run this update, we
|
|
# will block that for the rest of our transaction.
|
|
#
|
|
# So, let's stick it at the end so that we don't block event
|
|
# persistence.
|
|
#
|
|
# We do this by calculating the minimum depth of the backwards
|
|
# extremities. However, the events in event_backward_extremities
|
|
# are ones we don't have yet so we need to look at the events that
|
|
# point to it via event_edges table.
|
|
txn.execute(
|
|
"""
|
|
SELECT COALESCE(MIN(depth), 0)
|
|
FROM event_backward_extremities AS eb
|
|
INNER JOIN event_edges AS eg ON eg.prev_event_id = eb.event_id
|
|
INNER JOIN events AS e ON e.event_id = eg.event_id
|
|
WHERE eb.room_id = ?
|
|
""",
|
|
(room_id,),
|
|
)
|
|
(min_depth,) = txn.fetchone()
|
|
|
|
logger.info("[purge] updating room_depth to %d", min_depth)
|
|
|
|
txn.execute(
|
|
"UPDATE room_depth SET min_depth = ? WHERE room_id = ?",
|
|
(min_depth, room_id),
|
|
)
|
|
|
|
# finally, drop the temp table. this will commit the txn in sqlite,
|
|
# so make sure to keep this actually last.
|
|
txn.execute("DROP TABLE events_to_purge")
|
|
|
|
logger.info("[purge] done")
|
|
|
|
return referenced_state_groups
|
|
|
|
def purge_room(self, room_id):
|
|
"""Deletes all record of a room
|
|
|
|
Args:
|
|
room_id (str)
|
|
|
|
Returns:
|
|
Deferred[List[int]]: The list of state groups to delete.
|
|
"""
|
|
|
|
return self.db.runInteraction("purge_room", self._purge_room_txn, room_id)
|
|
|
|
def _purge_room_txn(self, txn, room_id):
|
|
# First we fetch all the state groups that should be deleted, before
|
|
# we delete that information.
|
|
txn.execute(
|
|
"""
|
|
SELECT DISTINCT state_group FROM events
|
|
INNER JOIN event_to_state_groups USING(event_id)
|
|
WHERE events.room_id = ?
|
|
""",
|
|
(room_id,),
|
|
)
|
|
|
|
state_groups = [row[0] for row in txn]
|
|
|
|
# Now we delete tables which lack an index on room_id but have one on event_id
|
|
for table in (
|
|
"event_auth",
|
|
"event_edges",
|
|
"event_push_actions_staging",
|
|
"event_reference_hashes",
|
|
"event_relations",
|
|
"event_to_state_groups",
|
|
"redactions",
|
|
"rejections",
|
|
"state_events",
|
|
):
|
|
logger.info("[purge] removing %s from %s", room_id, table)
|
|
|
|
txn.execute(
|
|
"""
|
|
DELETE FROM %s WHERE event_id IN (
|
|
SELECT event_id FROM events WHERE room_id=?
|
|
)
|
|
"""
|
|
% (table,),
|
|
(room_id,),
|
|
)
|
|
|
|
# and finally, the tables with an index on room_id (or no useful index)
|
|
for table in (
|
|
"current_state_events",
|
|
"event_backward_extremities",
|
|
"event_forward_extremities",
|
|
"event_json",
|
|
"event_push_actions",
|
|
"event_search",
|
|
"events",
|
|
"group_rooms",
|
|
"public_room_list_stream",
|
|
"receipts_graph",
|
|
"receipts_linearized",
|
|
"room_aliases",
|
|
"room_depth",
|
|
"room_memberships",
|
|
"room_stats_state",
|
|
"room_stats_current",
|
|
"room_stats_historical",
|
|
"room_stats_earliest_token",
|
|
"rooms",
|
|
"stream_ordering_to_exterm",
|
|
"users_in_public_rooms",
|
|
"users_who_share_private_rooms",
|
|
# no useful index, but let's clear them anyway
|
|
"appservice_room_list",
|
|
"e2e_room_keys",
|
|
"event_push_summary",
|
|
"pusher_throttle",
|
|
"group_summary_rooms",
|
|
"local_invites",
|
|
"room_account_data",
|
|
"room_tags",
|
|
"local_current_membership",
|
|
):
|
|
logger.info("[purge] removing %s from %s", room_id, table)
|
|
txn.execute("DELETE FROM %s WHERE room_id=?" % (table,), (room_id,))
|
|
|
|
# Other tables we do NOT need to clear out:
|
|
#
|
|
# - blocked_rooms
|
|
# This is important, to make sure that we don't accidentally rejoin a blocked
|
|
# room after it was purged
|
|
#
|
|
# - user_directory
|
|
# This has a room_id column, but it is unused
|
|
#
|
|
|
|
# Other tables that we might want to consider clearing out include:
|
|
#
|
|
# - event_reports
|
|
# Given that these are intended for abuse management my initial
|
|
# inclination is to leave them in place.
|
|
#
|
|
# - current_state_delta_stream
|
|
# - ex_outlier_stream
|
|
# - room_tags_revisions
|
|
# The problem with these is that they are largeish and there is no room_id
|
|
# index on them. In any case we should be clearing out 'stream' tables
|
|
# periodically anyway (#5888)
|
|
|
|
# TODO: we could probably usefully do a bunch of cache invalidation here
|
|
|
|
logger.info("[purge] done")
|
|
|
|
return state_groups
|
|
|
|
async def is_event_after(self, event_id1, event_id2):
|
|
"""Returns True if event_id1 is after event_id2 in the stream
|
|
"""
|
|
to_1, so_1 = await self._get_event_ordering(event_id1)
|
|
to_2, so_2 = await self._get_event_ordering(event_id2)
|
|
return (to_1, so_1) > (to_2, so_2)
|
|
|
|
@cachedInlineCallbacks(max_entries=5000)
|
|
def _get_event_ordering(self, event_id):
|
|
res = yield self.db.simple_select_one(
|
|
table="events",
|
|
retcols=["topological_ordering", "stream_ordering"],
|
|
keyvalues={"event_id": event_id},
|
|
allow_none=True,
|
|
)
|
|
|
|
if not res:
|
|
raise SynapseError(404, "Could not find event %s" % (event_id,))
|
|
|
|
return (int(res["topological_ordering"]), int(res["stream_ordering"]))
|
|
|
|
def insert_labels_for_event_txn(
|
|
self, txn, event_id, labels, room_id, topological_ordering
|
|
):
|
|
"""Store the mapping between an event's ID and its labels, with one row per
|
|
(event_id, label) tuple.
|
|
|
|
Args:
|
|
txn (LoggingTransaction): The transaction to execute.
|
|
event_id (str): The event's ID.
|
|
labels (list[str]): A list of text labels.
|
|
room_id (str): The ID of the room the event was sent to.
|
|
topological_ordering (int): The position of the event in the room's topology.
|
|
"""
|
|
return self.db.simple_insert_many_txn(
|
|
txn=txn,
|
|
table="event_labels",
|
|
values=[
|
|
{
|
|
"event_id": event_id,
|
|
"label": label,
|
|
"room_id": room_id,
|
|
"topological_ordering": topological_ordering,
|
|
}
|
|
for label in labels
|
|
],
|
|
)
|
|
|
|
def _insert_event_expiry_txn(self, txn, event_id, expiry_ts):
|
|
"""Save the expiry timestamp associated with a given event ID.
|
|
|
|
Args:
|
|
txn (LoggingTransaction): The database transaction to use.
|
|
event_id (str): The event ID the expiry timestamp is associated with.
|
|
expiry_ts (int): The timestamp at which to expire (delete) the event.
|
|
"""
|
|
return self.db.simple_insert_txn(
|
|
txn=txn,
|
|
table="event_expiry",
|
|
values={"event_id": event_id, "expiry_ts": expiry_ts},
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def expire_event(self, event_id):
|
|
"""Retrieve and expire an event that has expired, and delete its associated
|
|
expiry timestamp. If the event can't be retrieved, delete its associated
|
|
timestamp so we don't try to expire it again in the future.
|
|
|
|
Args:
|
|
event_id (str): The ID of the event to delete.
|
|
"""
|
|
# Try to retrieve the event's content from the database or the event cache.
|
|
event = yield self.get_event(event_id)
|
|
|
|
def delete_expired_event_txn(txn):
|
|
# Delete the expiry timestamp associated with this event from the database.
|
|
self._delete_event_expiry_txn(txn, event_id)
|
|
|
|
if not event:
|
|
# If we can't find the event, log a warning and delete the expiry date
|
|
# from the database so that we don't try to expire it again in the
|
|
# future.
|
|
logger.warning(
|
|
"Can't expire event %s because we don't have it.", event_id
|
|
)
|
|
return
|
|
|
|
# Prune the event's dict then convert it to JSON.
|
|
pruned_json = encode_json(
|
|
prune_event_dict(event.room_version, event.get_dict())
|
|
)
|
|
|
|
# Update the event_json table to replace the event's JSON with the pruned
|
|
# JSON.
|
|
self._censor_event_txn(txn, event.event_id, pruned_json)
|
|
|
|
# We need to invalidate the event cache entry for this event because we
|
|
# changed its content in the database. We can't call
|
|
# self._invalidate_cache_and_stream because self.get_event_cache isn't of the
|
|
# right type.
|
|
txn.call_after(self._get_event_cache.invalidate, (event.event_id,))
|
|
# Send that invalidation to replication so that other workers also invalidate
|
|
# the event cache.
|
|
self._send_invalidation_to_replication(
|
|
txn, "_get_event_cache", (event.event_id,)
|
|
)
|
|
|
|
yield self.db.runInteraction("delete_expired_event", delete_expired_event_txn)
|
|
|
|
def _delete_event_expiry_txn(self, txn, event_id):
|
|
"""Delete the expiry timestamp associated with an event ID without deleting the
|
|
actual event.
|
|
|
|
Args:
|
|
txn (LoggingTransaction): The transaction to use to perform the deletion.
|
|
event_id (str): The event ID to delete the associated expiry timestamp of.
|
|
"""
|
|
return self.db.simple_delete_txn(
|
|
txn=txn, table="event_expiry", keyvalues={"event_id": event_id}
|
|
)
|
|
|
|
def get_next_event_to_expire(self):
|
|
"""Retrieve the entry with the lowest expiry timestamp in the event_expiry
|
|
table, or None if there's no more event to expire.
|
|
|
|
Returns: Deferred[Optional[Tuple[str, int]]]
|
|
A tuple containing the event ID as its first element and an expiry timestamp
|
|
as its second one, if there's at least one row in the event_expiry table.
|
|
None otherwise.
|
|
"""
|
|
|
|
def get_next_event_to_expire_txn(txn):
|
|
txn.execute(
|
|
"""
|
|
SELECT event_id, expiry_ts FROM event_expiry
|
|
ORDER BY expiry_ts ASC LIMIT 1
|
|
"""
|
|
)
|
|
|
|
return txn.fetchone()
|
|
|
|
return self.db.runInteraction(
|
|
desc="get_next_event_to_expire", func=get_next_event_to_expire_txn
|
|
)
|
|
|
|
|
|
AllNewEventsResult = namedtuple(
|
|
"AllNewEventsResult",
|
|
[
|
|
"new_forward_events",
|
|
"new_backfill_events",
|
|
"forward_ex_outliers",
|
|
"backward_ex_outliers",
|
|
],
|
|
)
|