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Don't require to_delete to have event_ids

This commit is contained in:
Erik Johnston 2018-07-24 11:59:16 +01:00
parent 0a8e4f3af9
commit 223341205e

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@ -19,7 +19,7 @@ import logging
from collections import OrderedDict, deque, namedtuple
from functools import wraps
from six import iteritems, itervalues
from six import iteritems
from six.moves import range
from canonicaljson import json
@ -347,8 +347,9 @@ class EventsStore(EventsWorkerStore):
# state in each room after adding these events
current_state_for_room = {}
# map room_id->(to_delete, to_insert) where each entry is
# a map (type,key)->event_id giving the state delta in each
# map room_id->(to_delete, to_insert) where to_delete is a list
# of type/state keys to remove from current state, and to_insert
# is a map (type,key)->event_id giving the state delta in each
# room
state_delta_for_room = {}
@ -647,17 +648,16 @@ class EventsStore(EventsWorkerStore):
Assumes that we are only persisting events for one room at a time.
Returns:
2-tuple (to_delete, to_insert) where both are state dicts,
i.e. (type, state_key) -> event_id. `to_delete` are the entries to
first be deleted from current_state_events, `to_insert` are entries
to insert.
tuple[list, dict] (to_delete, to_insert): where to_delete are the
type/state_keys to remove from current_state_events and `to_insert`
are the updates to current_state_events.
"""
existing_state = yield self.get_current_state_ids(room_id)
to_delete = {
key: ev_id for key, ev_id in iteritems(existing_state)
if ev_id != current_state.get(key)
}
to_delete = [
key for key, ev_id in iteritems(existing_state)
if key not in current_state
]
to_insert = {
key: ev_id for key, ev_id in iteritems(current_state)
@ -684,10 +684,10 @@ class EventsStore(EventsWorkerStore):
delete_existing (bool): True to purge existing table rows for the
events from the database. This is useful when retrying due to
IntegrityError.
state_delta_for_room (dict[str, (list[str], list[str])]):
state_delta_for_room (dict[str, (list, dict)]):
The current-state delta for each room. For each room, a tuple
(to_delete, to_insert), being a list of event ids to be removed
from the current state, and a list of event ids to be added to
(to_delete, to_insert), being a list of type/state keys to be
removed from the current state, and a state set to be added to
the current state.
new_forward_extremeties (dict[str, list[str]]):
The new forward extremities for each room. For each room, a
@ -765,9 +765,46 @@ class EventsStore(EventsWorkerStore):
def _update_current_state_txn(self, txn, state_delta_by_room, max_stream_order):
for room_id, current_state_tuple in iteritems(state_delta_by_room):
to_delete, to_insert = current_state_tuple
# 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).
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, (
(
max_stream_order, room_id, etype, state_key, None,
room_id, etype, state_key,
)
for etype, state_key in to_delete
# We sanity check that we're deleting rather than updating
if (etype, state_key) not in to_insert
))
txn.executemany(sql, (
(
max_stream_order, room_id, etype, state_key, ev_id,
room_id, etype, state_key,
)
for (etype, state_key), ev_id in iteritems(to_insert)
))
# Now we actually update the current_state_events table
txn.executemany(
"DELETE FROM current_state_events WHERE event_id = ?",
[(ev_id,) for ev_id in itervalues(to_delete)],
"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)
),
)
self._simple_insert_many_txn(
@ -784,25 +821,6 @@ class EventsStore(EventsWorkerStore):
],
)
state_deltas = {key: None for key in to_delete}
state_deltas.update(to_insert)
self._simple_insert_many_txn(
txn,
table="current_state_delta_stream",
values=[
{
"stream_id": max_stream_order,
"room_id": room_id,
"type": key[0],
"state_key": key[1],
"event_id": ev_id,
"prev_event_id": to_delete.get(key, None),
}
for key, ev_id in iteritems(state_deltas)
]
)
txn.call_after(
self._curr_state_delta_stream_cache.entity_has_changed,
room_id, max_stream_order,
@ -816,7 +834,8 @@ class EventsStore(EventsWorkerStore):
# and which we have added, then we invlidate the caches for all
# those users.
members_changed = set(
state_key for ev_type, state_key in state_deltas
state_key
for ev_type, state_key in itertools.chain(to_delete, to_insert)
if ev_type == EventTypes.Member
)