diff options
Diffstat (limited to 'synapse/storage')
| -rw-r--r-- | synapse/storage/data_stores/main/events.py | 126 | ||||
| -rw-r--r-- | synapse/storage/data_stores/main/schema/delta/56/event_expiry.sql | 21 |
2 files changed, 141 insertions, 6 deletions
diff --git a/synapse/storage/data_stores/main/events.py b/synapse/storage/data_stores/main/events.py index 2737a1d3ae..79c91fe284 100644 --- a/synapse/storage/data_stores/main/events.py +++ b/synapse/storage/data_stores/main/events.py @@ -130,6 +130,8 @@ class EventsStore( if self.hs.config.redaction_retention_period is not None: hs.get_clock().looping_call(_censor_redactions, 5 * 60 * 1000) + self._ephemeral_messages_enabled = hs.config.enable_ephemeral_messages + @defer.inlineCallbacks def _read_forward_extremities(self): def fetch(txn): @@ -940,6 +942,12 @@ class EventsStore( 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, @@ -1101,12 +1109,7 @@ class EventsStore( def _update_censor_txn(txn): for redaction_id, event_id, pruned_json in updates: if pruned_json: - self._simple_update_one_txn( - txn, - table="event_json", - keyvalues={"event_id": event_id}, - updatevalues={"json": pruned_json}, - ) + self._censor_event_txn(txn, event_id, pruned_json) self._simple_update_one_txn( txn, @@ -1117,6 +1120,22 @@ class EventsStore( yield self.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._simple_update_one_txn( + txn, + table="event_json", + keyvalues={"event_id": event_id}, + updatevalues={"json": pruned_json}, + ) + @defer.inlineCallbacks def count_daily_messages(self): """ @@ -1957,6 +1976,101 @@ class EventsStore( ], ) + 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._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.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.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._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.runInteraction( + desc="get_next_event_to_expire", func=get_next_event_to_expire_txn + ) + AllNewEventsResult = namedtuple( "AllNewEventsResult", diff --git a/synapse/storage/data_stores/main/schema/delta/56/event_expiry.sql b/synapse/storage/data_stores/main/schema/delta/56/event_expiry.sql new file mode 100644 index 0000000000..81a36a8b1d --- /dev/null +++ b/synapse/storage/data_stores/main/schema/delta/56/event_expiry.sql @@ -0,0 +1,21 @@ +/* Copyright 2019 The Matrix.org Foundation C.I.C. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +CREATE TABLE IF NOT EXISTS event_expiry ( + event_id TEXT PRIMARY KEY, + expiry_ts BIGINT NOT NULL +); + +CREATE INDEX event_expiry_expiry_ts_idx ON event_expiry(expiry_ts); |