Merge pull request #1840 from matrix-org/erikj/current_state_fix

Insert delta of current_state_events to be more efficient
pull/1852/head
Erik Johnston 2017-01-23 16:14:34 +00:00 committed by GitHub
commit f5b46482f4
5 changed files with 165 additions and 184 deletions

View File

@ -88,9 +88,13 @@ class BaseHandler(object):
current_state = yield self.store.get_events(
context.current_state_ids.values()
)
current_state = current_state.values()
else:
current_state = yield self.store.get_current_state(event.room_id)
current_state = yield self.state_handler.get_current_state(
event.room_id
)
current_state = current_state.values()
logger.info("maybe_kick_guest_users %r", current_state)
yield self.kick_guest_users(current_state)

View File

@ -76,9 +76,6 @@ class SlavedEventStore(BaseSlavedStore):
get_latest_event_ids_in_room = EventFederationStore.__dict__[
"get_latest_event_ids_in_room"
]
_get_current_state_for_key = StateStore.__dict__[
"_get_current_state_for_key"
]
get_invited_rooms_for_user = RoomMemberStore.__dict__[
"get_invited_rooms_for_user"
]
@ -115,8 +112,6 @@ class SlavedEventStore(BaseSlavedStore):
)
get_event = DataStore.get_event.__func__
get_events = DataStore.get_events.__func__
get_current_state = DataStore.get_current_state.__func__
get_current_state_for_key = DataStore.get_current_state_for_key.__func__
get_rooms_for_user_where_membership_is = (
DataStore.get_rooms_for_user_where_membership_is.__func__
)
@ -248,7 +243,6 @@ class SlavedEventStore(BaseSlavedStore):
def invalidate_caches_for_event(self, event, backfilled, reset_state):
if reset_state:
self._get_current_state_for_key.invalidate_all()
self.get_rooms_for_user.invalidate_all()
self.get_users_in_room.invalidate((event.room_id,))
@ -289,7 +283,3 @@ class SlavedEventStore(BaseSlavedStore):
if (not event.internal_metadata.is_invite_from_remote()
and event.internal_metadata.is_outlier()):
return
self._get_current_state_for_key.invalidate((
event.room_id, event.type, event.state_key
))

View File

@ -284,71 +284,37 @@ class EventsStore(SQLBaseStore):
new_forward_extremeties = {}
current_state_for_room = {}
if not backfilled:
# Work out the new "current state" for each room.
# We do this by working out what the new extremities are and then
# calculating the state from that.
events_by_room = {}
for event, context in chunk:
events_by_room.setdefault(event.room_id, []).append(
(event, context)
)
for room_id, ev_ctx_rm in events_by_room.items():
# Work out new extremities by recursively adding and removing
# the new events.
latest_event_ids = yield self.get_latest_event_ids_in_room(
room_id
)
new_latest_event_ids = yield self._calculate_new_extremeties(
room_id, [ev for ev, _ in ev_ctx_rm]
)
if new_latest_event_ids == set(latest_event_ids):
# No change in extremities, so no change in state
continue
new_forward_extremeties[room_id] = new_latest_event_ids
# Now we need to work out the different state sets for
# each state extremities
state_sets = []
missing_event_ids = []
was_updated = False
for event_id in new_latest_event_ids:
# First search in the list of new events we're adding,
# and then use the current state from that
for ev, ctx in ev_ctx_rm:
if event_id == ev.event_id:
if ctx.current_state_ids is None:
raise Exception("Unknown current state")
state_sets.append(ctx.current_state_ids)
if ctx.delta_ids or hasattr(ev, "state_key"):
was_updated = True
break
else:
# If we couldn't find it, then we'll need to pull
# the state from the database
was_updated = True
missing_event_ids.append(event_id)
if missing_event_ids:
# Now pull out the state for any missing events from DB
event_to_groups = yield self._get_state_group_for_events(
missing_event_ids,
with Measure(self._clock, "_calculate_state_and_extrem"):
# Work out the new "current state" for each room.
# We do this by working out what the new extremities are and then
# calculating the state from that.
events_by_room = {}
for event, context in chunk:
events_by_room.setdefault(event.room_id, []).append(
(event, context)
)
groups = set(event_to_groups.values())
group_to_state = yield self._get_state_for_groups(groups)
state_sets.extend(group_to_state.values())
if not new_latest_event_ids or was_updated:
current_state_for_room[room_id] = yield resolve_events(
state_sets,
state_map_factory=lambda ev_ids: self.get_events(
ev_ids, get_prev_content=False, check_redacted=False,
),
for room_id, ev_ctx_rm in events_by_room.items():
# Work out new extremities by recursively adding and removing
# the new events.
latest_event_ids = yield self.get_latest_event_ids_in_room(
room_id
)
new_latest_event_ids = yield self._calculate_new_extremeties(
room_id, [ev for ev, _ in ev_ctx_rm]
)
if new_latest_event_ids == set(latest_event_ids):
# No change in extremities, so no change in state
continue
new_forward_extremeties[room_id] = new_latest_event_ids
state = yield self._calculate_state_delta(
room_id, ev_ctx_rm, new_latest_event_ids
)
if state:
current_state_for_room[room_id] = state
yield self.runInteraction(
"persist_events",
@ -405,6 +371,91 @@ class EventsStore(SQLBaseStore):
defer.returnValue(new_latest_event_ids)
@defer.inlineCallbacks
def _calculate_state_delta(self, room_id, events_context, new_latest_event_ids):
"""Calculate the new state deltas for a room.
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 entreis to
first be deleted from current_state_events, `to_insert` are entries
to insert.
May return None if there are no changes to be applied.
"""
# Now we need to work out the different state sets for
# each state extremities
state_sets = []
missing_event_ids = []
was_updated = False
for event_id in new_latest_event_ids:
# First search in the list of new events we're adding,
# and then use the current state from that
for ev, ctx in events_context:
if event_id == ev.event_id:
if ctx.current_state_ids is None:
raise Exception("Unknown current state")
state_sets.append(ctx.current_state_ids)
if ctx.delta_ids or hasattr(ev, "state_key"):
was_updated = True
break
else:
# If we couldn't find it, then we'll need to pull
# the state from the database
was_updated = True
missing_event_ids.append(event_id)
if missing_event_ids:
# Now pull out the state for any missing events from DB
event_to_groups = yield self._get_state_group_for_events(
missing_event_ids,
)
groups = set(event_to_groups.values())
group_to_state = yield self._get_state_for_groups(groups)
state_sets.extend(group_to_state.values())
if not new_latest_event_ids:
current_state = {}
elif was_updated:
current_state = yield resolve_events(
state_sets,
state_map_factory=lambda ev_ids: self.get_events(
ev_ids, get_prev_content=False, check_redacted=False,
),
)
else:
return
existing_state_rows = yield self._simple_select_list(
table="current_state_events",
keyvalues={"room_id": room_id},
retcols=["event_id", "type", "state_key"],
desc="_calculate_state_delta",
)
existing_events = set(row["event_id"] for row in existing_state_rows)
new_events = set(ev_id for ev_id in current_state.itervalues())
changed_events = existing_events ^ new_events
if not changed_events:
return
to_delete = {
(row["type"], row["state_key"]): row["event_id"]
for row in existing_state_rows
if row["event_id"] in changed_events
}
events_to_insert = (new_events - existing_events)
to_insert = {
key: ev_id for key, ev_id in current_state.iteritems()
if ev_id in events_to_insert
}
defer.returnValue((to_delete, to_insert))
@defer.inlineCallbacks
def get_event(self, event_id, check_redacted=True,
get_prev_content=False, allow_rejected=False,
@ -475,38 +526,55 @@ class EventsStore(SQLBaseStore):
database before insertion. This is useful when retrying due to IntegrityError.
"""
max_stream_order = events_and_contexts[-1][0].internal_metadata.stream_ordering
for room_id, current_state in current_state_for_room.iteritems():
txn.call_after(self._get_current_state_for_key.invalidate_all)
txn.call_after(self.get_rooms_for_user.invalidate_all)
txn.call_after(self.get_users_in_room.invalidate, (room_id,))
for room_id, current_state_tuple in current_state_for_room.iteritems():
to_delete, to_insert = current_state_tuple
txn.executemany(
"DELETE FROM current_state_events WHERE event_id = ?",
[(ev_id,) for ev_id in to_delete.itervalues()],
)
# Add an entry to the current_state_resets table to record the point
# where we clobbered the current state
self._simple_insert_txn(
txn,
table="current_state_resets",
values={"event_stream_ordering": max_stream_order}
)
self._simple_insert_many_txn(
txn,
table="current_state_events",
values=[
{
"event_id": ev_id,
"room_id": room_id,
"type": key[0],
"state_key": key[1],
}
for key, ev_id in to_insert.iteritems()
],
)
self._simple_delete_txn(
txn,
table="current_state_events",
keyvalues={"room_id": room_id},
)
# Invalidate the various caches
self._simple_insert_many_txn(
txn,
table="current_state_events",
values=[
{
"event_id": ev_id,
"room_id": room_id,
"type": key[0],
"state_key": key[1],
}
for key, ev_id in current_state.iteritems()
],
)
# 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 = set(
state_key for ev_type, state_key in to_delete.iterkeys()
if ev_type == EventTypes.Member
)
members_changed.update(
state_key for ev_type, state_key in to_insert.iterkeys()
if ev_type == EventTypes.Member
)
for member in members_changed:
txn.call_after(self.get_rooms_for_user.invalidate, (member,))
txn.call_after(self.get_users_in_room.invalidate, (room_id,))
# Add an entry to the current_state_resets table to record the point
# where we clobbered the current state
self._simple_insert_txn(
txn,
table="current_state_resets",
values={"event_stream_ordering": max_stream_order}
)
for room_id, new_extrem in new_forward_extremeties.items():
self._simple_delete_txn(

View File

@ -232,58 +232,6 @@ class StateStore(SQLBaseStore):
return count
@defer.inlineCallbacks
def get_current_state(self, room_id, event_type=None, state_key=""):
if event_type and state_key is not None:
result = yield self.get_current_state_for_key(
room_id, event_type, state_key
)
defer.returnValue(result)
def f(txn):
sql = (
"SELECT event_id FROM current_state_events"
" WHERE room_id = ? "
)
if event_type and state_key is not None:
sql += " AND type = ? AND state_key = ? "
args = (room_id, event_type, state_key)
elif event_type:
sql += " AND type = ?"
args = (room_id, event_type)
else:
args = (room_id, )
txn.execute(sql, args)
results = txn.fetchall()
return [r[0] for r in results]
event_ids = yield self.runInteraction("get_current_state", f)
events = yield self._get_events(event_ids, get_prev_content=False)
defer.returnValue(events)
@defer.inlineCallbacks
def get_current_state_for_key(self, room_id, event_type, state_key):
event_ids = yield self._get_current_state_for_key(room_id, event_type, state_key)
events = yield self._get_events(event_ids, get_prev_content=False)
defer.returnValue(events)
@cached(num_args=3)
def _get_current_state_for_key(self, room_id, event_type, state_key):
def f(txn):
sql = (
"SELECT event_id FROM current_state_events"
" WHERE room_id = ? AND type = ? AND state_key = ?"
)
args = (room_id, event_type, state_key)
txn.execute(sql, args)
results = txn.fetchall()
return [r[0] for r in results]
return self.runInteraction("get_current_state_for_key", f)
@cached(num_args=2, max_entries=100000, iterable=True)
def _get_state_group_from_group(self, group, types):
raise NotImplementedError()

View File

@ -118,35 +118,6 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
"get_latest_event_ids_in_room", (ROOM_ID,), [join.event_id]
)
@defer.inlineCallbacks
def test_get_current_state(self):
# Create the room.
yield self.persist(type="m.room.create", key="", creator=USER_ID)
yield self.replicate()
yield self.check(
"get_current_state_for_key", (ROOM_ID, "m.room.member", USER_ID), []
)
# Join the room.
join1 = yield self.persist(
type="m.room.member", key=USER_ID, membership="join",
)
yield self.replicate()
yield self.check(
"get_current_state_for_key", (ROOM_ID, "m.room.member", USER_ID),
[join1]
)
# Add some other user to the room.
join2 = yield self.persist(
type="m.room.member", key=USER_ID_2, membership="join",
)
yield self.replicate()
yield self.check(
"get_current_state_for_key", (ROOM_ID, "m.room.member", USER_ID_2),
[join2]
)
@defer.inlineCallbacks
def test_redactions(self):
yield self.persist(type="m.room.create", key="", creator=USER_ID)