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Fetch events in bulk

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This commit is contained in:
Erik Johnston 2015-05-13 15:13:42 +01:00
parent 6edff11a88
commit ca4f458787
2 changed files with 63 additions and 34 deletions
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75
synapse/storage/_base.py
View file

@ -875,19 +875,11 @@ class SQLBaseStore(object):
def _get_events_txn(self, txn, event_ids, check_redacted=True,
get_prev_content=False):
if not event_ids:
return []
events = [
self._get_event_txn(
txn, event_id,
check_redacted=check_redacted,
get_prev_content=get_prev_content
)
for event_id in event_ids
]
return [e for e in events if e]
return self._fetch_events_txn(
txn, event_ids,
check_redacted=check_redacted,
get_prev_content=get_prev_content,
)
def _invalidate_get_event_cache(self, event_id):
for check_redacted in (False, True):
@ -950,6 +942,63 @@ class SQLBaseStore(object):
else:
return None
def _fetch_events_txn(self, txn, events, check_redacted=True,
get_prev_content=False, allow_rejected=False):
if not events:
return []
event_map = {}
for event_id in events:
try:
ret = self._get_event_cache.get(event_id, check_redacted, get_prev_content)
if allow_rejected or not ret.rejected_reason:
event_map[event_id] = ret
else:
return None
except KeyError:
pass
missing_events = [
e for e in events
if e not in event_map
]
if missing_events:
sql = (
"SELECT e.internal_metadata, e.json, r.redacts, rej.event_id "
" FROM event_json as e"
" LEFT JOIN rejections as rej USING (event_id)"
" LEFT JOIN redactions as r ON e.event_id = r.redacts"
" WHERE e.event_id IN (%s)"
) % (",".join(["?"]*len(missing_events)),)
txn.execute(sql, missing_events)
rows = txn.fetchall()
res = [
self._get_event_from_row_txn(
txn, row[0], row[1], row[2],
check_redacted=check_redacted,
get_prev_content=get_prev_content,
rejected_reason=row[3],
)
for row in rows
]
event_map.update({
e.event_id: e
for e in res if e
})
for e in res:
self._get_event_cache.prefill(
e.event_id, check_redacted, get_prev_content, e
)
return [event_map[e_id] for e_id in events if e_id in event_map]
def _get_event_from_row_txn(self, txn, internal_metadata, js, redacted,
check_redacted=True, get_prev_content=False,
rejected_reason=None):

22
synapse/storage/state.py
View file

@ -83,31 +83,11 @@ class StateStore(SQLBaseStore):
f,
)
def fetch_events(txn, events):
sql = (
"SELECT e.internal_metadata, e.json, r.redacts, rej.event_id "
" FROM event_json as e"
" LEFT JOIN rejections as rej USING (event_id)"
" LEFT JOIN redactions as r ON e.event_id = r.redacts"
" WHERE e.event_id IN (%s)"
) % (",".join(["?"]*len(events)),)
txn.execute(sql, events)
rows = txn.fetchall()
return [
self._get_event_from_row_txn(
txn, row[0], row[1], row[2],
rejected_reason=row[3],
)
for row in rows
]
@defer.inlineCallbacks
def c(vals):
vals[:] = yield self.runInteraction(
"_get_state_groups_ev",
fetch_events, vals
self._fetch_events_txn, vals
)
yield defer.gatherResults(