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Fetch events from events_id in their own transactions

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This commit is contained in:
Erik Johnston 2015-05-13 16:59:41 +01:00
parent a988361aea
commit 4071f29653
3 changed files with 168 additions and 18 deletions
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154
synapse/storage/_base.py
View File

@ -867,11 +867,26 @@ class SQLBaseStore(object):
return self.runInteraction("_simple_max_id", func)
@defer.inlineCallbacks
def _get_events(self, event_ids, check_redacted=True,
get_prev_content=False, desc="_get_events"):
return self.runInteraction(
desc, self._get_events_txn, event_ids,
check_redacted=check_redacted, get_prev_content=get_prev_content,
N = 50 # Only fetch 100 events at a time.
ds = [
self.runInteraction(
desc,
self._fetch_events_txn,
event_ids[i*N:(i+1)*N],
check_redacted=check_redacted,
get_prev_content=get_prev_content,
)
for i in range(1 + len(event_ids) / N)
]
res = yield defer.gatherResults(ds, consumeErrors=True)
defer.returnValue(
list(itertools.chain(*res))
)
def _get_events_txn(self, txn, event_ids, check_redacted=True,
@ -1007,6 +1022,139 @@ class SQLBaseStore(object):
if e_id in event_map and event_map[e_id]
]
@defer.inlineCallbacks
def _fetch_events(self, events, check_redacted=True,
get_prev_content=False, allow_rejected=False):
if not events:
defer.returnValue([])
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:
event_map[event_id] = 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)),)
rows = yield self._execute(
"_fetch_events",
None,
sql,
*missing_events
)
res_ds = [
self._get_event_from_row(
row[0], row[1], row[2],
check_redacted=check_redacted,
get_prev_content=get_prev_content,
rejected_reason=row[3],
)
for row in rows
]
res = yield defer.gatherResults(res_ds, consumeErrors=True)
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
)
defer.returnValue([
event_map[e_id] for e_id in events
if e_id in event_map and event_map[e_id]
])
@defer.inlineCallbacks
def _get_event_from_row(self, internal_metadata, js, redacted,
check_redacted=True, get_prev_content=False,
rejected_reason=None):
start_time = time.time() * 1000
def update_counter(desc, last_time):
curr_time = self._get_event_counters.update(desc, last_time)
sql_getevents_timer.inc_by(curr_time - last_time, desc)
return curr_time
d = json.loads(js)
start_time = update_counter("decode_json", start_time)
internal_metadata = json.loads(internal_metadata)
start_time = update_counter("decode_internal", start_time)
if rejected_reason:
rejected_reason = yield self._simple_select_one_onecol(
desc="_get_event_from_row",
table="rejections",
keyvalues={"event_id": rejected_reason},
retcol="reason",
)
ev = FrozenEvent(
d,
internal_metadata_dict=internal_metadata,
rejected_reason=rejected_reason,
)
start_time = update_counter("build_frozen_event", start_time)
if check_redacted and redacted:
ev = prune_event(ev)
redaction_id = yield self._simple_select_one_onecol(
desc="_get_event_from_row",
table="redactions",
keyvalues={"redacts": ev.event_id},
retcol="event_id",
)
ev.unsigned["redacted_by"] = redaction_id
# Get the redaction event.
because = yield self.get_event_txn(
redaction_id,
check_redacted=False
)
if because:
ev.unsigned["redacted_because"] = because
start_time = update_counter("redact_event", start_time)
if get_prev_content and "replaces_state" in ev.unsigned:
prev = yield self.get_event(
ev.unsigned["replaces_state"],
get_prev_content=False,
)
if prev:
ev.unsigned["prev_content"] = prev.get_dict()["content"]
start_time = update_counter("get_prev_content", start_time)
defer.returnValue(ev)
def _get_event_from_row_txn(self, txn, internal_metadata, js, redacted,
check_redacted=True, get_prev_content=False,
rejected_reason=None):

10
synapse/storage/state.py
View File

@ -85,13 +85,13 @@ class StateStore(SQLBaseStore):
@defer.inlineCallbacks
def c(vals):
vals[:] = yield self.runInteraction(
"_get_state_groups_ev",
self._fetch_events_txn, vals
)
vals[:] = yield self._fetch_events(vals, get_prev_content=False)
yield defer.gatherResults(
[c(vals) for vals in states.values()],
[
c(vals)
for vals in states.values()
],
consumeErrors=True,
)

16
synapse/storage/stream.py
View File

@ -298,6 +298,7 @@ class StreamStore(SQLBaseStore):
return self.runInteraction("paginate_room_events", f)
@defer.inlineCallbacks
def get_recent_events_for_room(self, room_id, limit, end_token,
with_feedback=False, from_token=None):
# TODO (erikj): Handle compressed feedback
@ -349,19 +350,20 @@ class StreamStore(SQLBaseStore):
else:
token = (str(end_token), str(end_token))
events = self._get_events_txn(
txn,
return rows, token
rows, token = yield self.runInteraction(
"get_recent_events_for_room", get_recent_events_for_room_txn
)
events = yield self._get_events(
[r["event_id"] for r in rows],
get_prev_content=True
)
self._set_before_and_after(events, rows)
return events, token
return self.runInteraction(
"get_recent_events_for_room", get_recent_events_for_room_txn
)
defer.returnValue((events, token))
@defer.inlineCallbacks
def get_room_events_max_id(self, direction='f'):