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Make purge_history operate on tokens

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As we're soon going to change how topological_ordering works
This commit is contained in:
Erik Johnston 2018-05-15 16:06:30 +01:00
parent 37dbee6490
commit 5f27ed75ad
3 changed files with 25 additions and 21 deletions
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17
synapse/storage/events.py
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@ -33,7 +33,7 @@ from synapse.util.metrics import Measure
from synapse.api.constants import EventTypes
from synapse.api.errors import SynapseError
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
from synapse.types import get_domain_from_id
from synapse.types import get_domain_from_id, RoomStreamToken
import synapse.metrics
# these are only included to make the type annotations work
@ -1803,15 +1803,14 @@ class EventsStore(EventsWorkerStore):
return self.runInteraction("get_all_new_events", get_all_new_events_txn)
def purge_history(
self, room_id, topological_ordering, delete_local_events,
self, room_id, token, delete_local_events,
):
"""Deletes room history before a certain point
Args:
room_id (str):
topological_ordering (int):
minimum topo ordering to preserve
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
@ -1821,12 +1820,12 @@ class EventsStore(EventsWorkerStore):
return self.runInteraction(
"purge_history",
self._purge_history_txn, room_id, topological_ordering,
self._purge_history_txn, room_id, token,
delete_local_events,
)
def _purge_history_txn(
self, txn, room_id, topological_ordering, delete_local_events,
self, txn, room_id, token, delete_local_events,
):
# Tables that should be pruned:
# event_auth
@ -1856,6 +1855,8 @@ class EventsStore(EventsWorkerStore):
# furthermore, we might already have the table from a previous (failed)
# purge attempt, so let's drop the table first.
token = RoomStreamToken.parse(token)
txn.execute("DROP TABLE IF EXISTS events_to_purge")
txn.execute(
@ -1888,7 +1889,7 @@ class EventsStore(EventsWorkerStore):
rows = txn.fetchall()
max_depth = max(row[0] for row in rows)
if max_depth <= topological_ordering:
if max_depth <= token.topological:
# We need to ensure we don't delete all the events from the datanase
# otherwise we wouldn't be able to send any events (due to not
# having any backwards extremeties)
@ -1904,7 +1905,7 @@ class EventsStore(EventsWorkerStore):
should_delete_expr += " AND event_id NOT LIKE ?"
should_delete_params += ("%:" + self.hs.hostname, )
should_delete_params += (room_id, topological_ordering)
should_delete_params += (room_id, token.topological)
txn.execute(
"INSERT INTO events_to_purge"