Only delete push actions after 30 days

This commit is contained in:
David Baker 2016-05-20 15:25:12 +01:00
parent 60ff2e7984
commit 149fa411e2
2 changed files with 38 additions and 6 deletions

View File

@ -22,6 +22,8 @@ import ujson as json
logger = logging.getLogger(__name__)
KEEP_PUSH_ACTIONS_FOR_MS = 30 * 24 * 60 * 60 * 1000
class EventPushActionsStore(SQLBaseStore):
def _set_push_actions_for_event_and_users_txn(self, txn, event, tuples):
@ -224,16 +226,46 @@ class EventPushActionsStore(SQLBaseStore):
(room_id, event_id)
)
def _remove_push_actions_before_txn(self, txn, room_id, user_id,
def _remove_old_push_actions_before_txn(self, txn, room_id, user_id,
topological_ordering):
"""
Purges old, stale push actions for a user and room before a given
topological_ordering
Args:
txn: The transcation
room_id: Room ID to delete from
user_id: user ID to delete for
topological_ordering: The lowest topological ordering which will
not be deleted.
Returns:
"""
txn.call_after(
self.get_unread_event_push_actions_by_room_for_user.invalidate_many,
(room_id, user_id, )
)
threshold = self._clock.time_msec() - KEEP_PUSH_ACTIONS_FOR_MS
# We need to join on the events table to get the received_ts for
# event_push_actions and sqlite won't let us use a join in a delete so
# we can't just delete where received_ts < x. Furthermore we can
# only identify event_push_actions by a tuple of room_id, event_id
# we we can't use a subquery.
# Instead, we look up the stream ordering for the last event in that
# room received before the threshold time and delete event_push_actions
# in the room with a stream_odering before that.
txn.execute(
"DELETE FROM event_push_actions"
" WHERE room_id = ? AND user_id = ? AND topological_ordering < ?",
(room_id, user_id, topological_ordering,)
"DELETE FROM event_push_actions "
" WHERE user_id = ? AND room_id = ? AND "
" topological_ordering < ? AND stream_ordering < ("
" SELECT stream_ordering FROM events"
" WHERE room_id = ? AND received_ts < ?"
" ORDER BY stream_ordering DESC"
" LIMIT 1"
")",
(user_id, room_id, topological_ordering, room_id, threshold)
)

View File

@ -297,7 +297,7 @@ class ReceiptsStore(SQLBaseStore):
)
if receipt_type == "m.read" and topological_ordering:
self._remove_push_actions_before_txn(
self._remove_old_push_actions_before_txn(
txn,
room_id=room_id,
user_id=user_id,