Batch up various DB requests for event -> state
This commit is contained in:
Erik Johnston
parent
0211890134
commit
9eb5b23d3a
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@ -13,11 +13,10 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from ._base import SQLBaseStore, cached, cachedInlineCallbacks
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from ._base import SQLBaseStore, cached, cachedInlineCallbacks, cachedList
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from twisted.internet import defer
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from synapse.util import unwrapFirstError
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from synapse.util.stringutils import random_string
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import logging
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@ -50,32 +49,20 @@ class StateStore(SQLBaseStore):
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The return value is a dict mapping group names to lists of events.
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"""
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if not event_ids:
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defer.returnValue({})
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event_and_groups = yield defer.gatherResults(
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[
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self._get_state_group_for_event(
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room_id, event_id,
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).addCallback(lambda group, event_id: (event_id, group), event_id)
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for event_id in event_ids
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],
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consumeErrors=True,
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).addErrback(unwrapFirstError)
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event_to_groups = yield self._get_state_group_for_events(
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room_id, event_ids,
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)
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groups = set(group for _, group in event_and_groups if group)
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groups = set(event_to_groups.values())
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group_to_state = yield defer.gatherResults(
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[
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self._get_state_for_group(
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group,
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).addCallback(lambda state_dict, group: (group, state_dict), group)
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for group in groups
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],
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consumeErrors=True,
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).addErrback(unwrapFirstError)
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group_to_state = yield self._get_state_for_groups(groups)
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defer.returnValue({
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group: state_map.values()
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for group, state_map in group_to_state
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for group, state_map in group_to_state.items()
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})
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@cached(num_args=1)
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@ -212,17 +199,48 @@ class StateStore(SQLBaseStore):
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txn.execute(sql, args)
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return group, [
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r[0]
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for r in txn.fetchall()
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]
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return [r[0] for r in txn.fetchall()]
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return self.runInteraction(
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"_get_state_groups_from_group",
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f,
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)
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@cached(num_args=3, lru=True, max_entries=20000)
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def _get_state_groups_from_groups(self, groups_and_types):
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def f(txn):
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results = {}
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for group, types in groups_and_types:
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if types is not None:
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where_clause = "AND (%s)" % (
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" OR ".join(["(type = ? AND state_key = ?)"] * len(types)),
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)
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else:
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where_clause = ""
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sql = (
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"SELECT event_id FROM state_groups_state WHERE"
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" state_group = ? %s"
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) % (where_clause,)
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args = [group]
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if types is not None:
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args.extend([i for typ in types for i in typ])
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txn.execute(sql, args)
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results[group] = [
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r[0]
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for r in txn.fetchall()
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]
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return results
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return self.runInteraction(
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"_get_state_groups_from_groups",
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f,
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)
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@cached(num_args=3, lru=True, max_entries=10000)
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def _get_state_for_event_id(self, room_id, event_id, types):
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def f(txn):
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type_and_state_sql = " OR ".join([
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@ -274,33 +292,19 @@ class StateStore(SQLBaseStore):
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deferred: A list of dicts corresponding to the event_ids given.
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The dicts are mappings from (type, state_key) -> state_events
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"""
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event_and_groups = yield defer.gatherResults(
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[
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self._get_state_group_for_event(
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room_id, event_id,
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).addCallback(lambda group, event_id: (event_id, group), event_id)
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for event_id in event_ids
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],
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consumeErrors=True,
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).addErrback(unwrapFirstError)
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event_to_groups = yield self._get_state_group_for_events(
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room_id, event_ids,
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)
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groups = set(group for _, group in event_and_groups)
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groups = set(event_to_groups.values())
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res = yield defer.gatherResults(
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[
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self._get_state_for_group(
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group, types
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).addCallback(lambda state_dict, group: (group, state_dict), group)
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for group in groups
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],
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consumeErrors=True,
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).addErrback(unwrapFirstError)
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group_to_state = dict(res)
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group_to_state = yield self._get_state_for_groups(
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groups, types
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)
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event_to_state = {
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event_id: group_to_state[group]
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for event_id, group in event_and_groups
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for event_id, group in event_to_groups.items()
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}
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defer.returnValue([
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@ -320,8 +324,29 @@ class StateStore(SQLBaseStore):
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desc="_get_state_group_for_event",
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)
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@defer.inlineCallbacks
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def _get_state_for_group(self, group, types=None):
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@cachedList(cache=_get_state_group_for_event.cache, list_name="event_ids", num_args=2)
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def _get_state_group_for_events(self, room_id, event_ids):
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def f(txn):
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results = {}
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for event_id in event_ids:
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results[event_id] = self._simple_select_one_onecol_txn(
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txn,
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table="event_to_state_groups",
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keyvalues={
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"event_id": event_id,
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},
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retcol="state_group",
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allow_none=True,
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)
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return results
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return self.runInteraction(
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"_get_state_group_for_events",
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f,
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)
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def _get_state_for_group_from_cache(self, group, types=None):
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is_all, state_dict = self._state_group_cache.get(group)
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type_to_key = {}
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@ -339,7 +364,7 @@ class StateStore(SQLBaseStore):
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missing_types.add((typ, state_key))
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if is_all and types is None:
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defer.returnValue(state_dict)
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return state_dict, missing_types
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if is_all or (types is not None and not missing_types):
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sentinel = object()
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@ -354,41 +379,81 @@ class StateStore(SQLBaseStore):
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return True
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return False
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defer.returnValue({
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return {
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k: v
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for k, v in state_dict.items()
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if v and include(k[0], k[1])
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})
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}, missing_types
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return {}, missing_types
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@defer.inlineCallbacks
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def _get_state_for_groups(self, groups, types=None):
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results = {}
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missing_groups_and_types = []
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for group in groups:
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state_dict, missing_types = self._get_state_for_group_from_cache(
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group, types
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)
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if types is not None and not missing_types:
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results[group] = {
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key: value
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for key, value in state_dict.items()
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if value
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}
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else:
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missing_groups_and_types.append((
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group,
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missing_types if types else None
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))
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if not missing_groups_and_types:
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defer.returnValue(results)
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# Okay, so we have some missing_types, lets fetch them.
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cache_seq_num = self._state_group_cache.sequence
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_, state_ids = yield self._get_state_groups_from_group(
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group,
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frozenset(missing_types) if types else None
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group_state_dict = yield self._get_state_groups_from_groups(
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missing_groups_and_types
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)
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state_events = yield self._get_events(state_ids, get_prev_content=False)
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state_dict = {
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key: None
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for key in missing_types
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}
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state_dict.update({
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(e.type, e.state_key): e
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state_events = yield self._get_events(
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[e_id for l in group_state_dict.values() for e_id in l],
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get_prev_content=False
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)
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state_events = {
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e.event_id: e
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for e in state_events
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})
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}
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# Update the cache
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self._state_group_cache.update(
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cache_seq_num,
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key=group,
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value=state_dict,
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full=(types is None),
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)
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for group, state_ids in group_state_dict.items():
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state_dict = {
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key: None
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for key in missing_types
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}
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evs = [state_events[e_id] for e_id in state_ids]
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state_dict.update({
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(e.type, e.state_key): e
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for e in evs
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})
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defer.returnValue({
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key: value
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for key, value in state_dict.items()
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if value
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})
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# Update the cache
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self._state_group_cache.update(
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cache_seq_num,
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key=group,
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value=state_dict,
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full=(types is None),
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)
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results[group] = {
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key: value
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for key, value in state_dict.items()
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if value
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}
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defer.returnValue(results)
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def _make_group_id(clock):
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