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Ensure we don't mutate state cache entries

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This commit is contained in:
Erik Johnston 2016-09-14 10:03:48 +01:00
parent 1b01488d27
commit d5ae1f1291
3 changed files with 33 additions and 22 deletions
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45
synapse/storage/state.py
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@ -817,27 +817,32 @@ class StateStore(SQLBaseStore):
@defer.inlineCallbacks
def _background_index_state(self, progress, batch_size):
def reindex_txn(txn):
if isinstance(self.database_engine, PostgresEngine):
txn.execute(
"CREATE INDEX CONCURRENTLY state_groups_state_type_idx"
" ON state_groups_state(state_group, type, state_key)"
)
txn.execute(
"DROP INDEX IF EXISTS state_groups_state_id"
)
else:
txn.execute(
"CREATE INDEX state_groups_state_type_idx"
" ON state_groups_state(state_group, type, state_key)"
)
txn.execute(
"DROP INDEX IF EXISTS state_groups_state_id"
)
def reindex_txn(conn):
conn.rollback()
# postgres insists on autocommit for the index
conn.set_session(autocommit=True)
try:
txn = conn.cursor()
if isinstance(self.database_engine, PostgresEngine):
txn.execute(
"CREATE INDEX CONCURRENTLY state_groups_state_type_idx"
" ON state_groups_state(state_group, type, state_key)"
)
txn.execute(
"DROP INDEX IF EXISTS state_groups_state_id"
)
else:
txn.execute(
"CREATE INDEX state_groups_state_type_idx"
" ON state_groups_state(state_group, type, state_key)"
)
txn.execute(
"DROP INDEX IF EXISTS state_groups_state_id"
)
finally:
conn.set_session(autocommit=False)
yield self.runInteraction(
self.STATE_GROUP_INDEX_UPDATE_NAME, reindex_txn
)
yield self.runWithConnection(reindex_txn)
yield self._end_background_update(self.STATE_GROUP_INDEX_UPDATE_NAME)