mirror of
https://github.com/element-hq/synapse
synced 2024-09-12 03:35:10 +00:00
Merge pull request #2661 from matrix-org/rav/statereadstore
Pull out bits of StateStore to a mixin
This commit is contained in:
commit
f959c01600
3 changed files with 237 additions and 249 deletions
|
@ -12,20 +12,18 @@
|
||||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
# See the License for the specific language governing permissions and
|
# See the License for the specific language governing permissions and
|
||||||
# limitations under the License.
|
# limitations under the License.
|
||||||
from ._base import BaseSlavedStore
|
import logging
|
||||||
from ._slaved_id_tracker import SlavedIdTracker
|
|
||||||
|
|
||||||
from synapse.api.constants import EventTypes
|
from synapse.api.constants import EventTypes
|
||||||
from synapse.storage import DataStore
|
from synapse.storage import DataStore
|
||||||
from synapse.storage.roommember import RoomMemberStore
|
|
||||||
from synapse.storage.event_federation import EventFederationStore
|
from synapse.storage.event_federation import EventFederationStore
|
||||||
from synapse.storage.event_push_actions import EventPushActionsStore
|
from synapse.storage.event_push_actions import EventPushActionsStore
|
||||||
from synapse.storage.state import StateStore
|
from synapse.storage.roommember import RoomMemberStore
|
||||||
|
from synapse.storage.state import StateGroupReadStore
|
||||||
from synapse.storage.stream import StreamStore
|
from synapse.storage.stream import StreamStore
|
||||||
from synapse.util.caches.stream_change_cache import StreamChangeCache
|
from synapse.util.caches.stream_change_cache import StreamChangeCache
|
||||||
|
from ._base import BaseSlavedStore
|
||||||
import logging
|
from ._slaved_id_tracker import SlavedIdTracker
|
||||||
|
|
||||||
|
|
||||||
logger = logging.getLogger(__name__)
|
logger = logging.getLogger(__name__)
|
||||||
|
|
||||||
|
@ -39,7 +37,7 @@ logger = logging.getLogger(__name__)
|
||||||
# the method descriptor on the DataStore and chuck them into our class.
|
# the method descriptor on the DataStore and chuck them into our class.
|
||||||
|
|
||||||
|
|
||||||
class SlavedEventStore(BaseSlavedStore):
|
class SlavedEventStore(StateGroupReadStore, BaseSlavedStore):
|
||||||
|
|
||||||
def __init__(self, db_conn, hs):
|
def __init__(self, db_conn, hs):
|
||||||
super(SlavedEventStore, self).__init__(db_conn, hs)
|
super(SlavedEventStore, self).__init__(db_conn, hs)
|
||||||
|
@ -90,25 +88,9 @@ class SlavedEventStore(BaseSlavedStore):
|
||||||
_get_unread_counts_by_pos_txn = (
|
_get_unread_counts_by_pos_txn = (
|
||||||
DataStore._get_unread_counts_by_pos_txn.__func__
|
DataStore._get_unread_counts_by_pos_txn.__func__
|
||||||
)
|
)
|
||||||
_get_state_group_for_events = (
|
|
||||||
StateStore.__dict__["_get_state_group_for_events"]
|
|
||||||
)
|
|
||||||
_get_state_group_for_event = (
|
|
||||||
StateStore.__dict__["_get_state_group_for_event"]
|
|
||||||
)
|
|
||||||
_get_state_groups_from_groups = (
|
|
||||||
StateStore.__dict__["_get_state_groups_from_groups"]
|
|
||||||
)
|
|
||||||
_get_state_groups_from_groups_txn = (
|
|
||||||
DataStore._get_state_groups_from_groups_txn.__func__
|
|
||||||
)
|
|
||||||
get_recent_event_ids_for_room = (
|
get_recent_event_ids_for_room = (
|
||||||
StreamStore.__dict__["get_recent_event_ids_for_room"]
|
StreamStore.__dict__["get_recent_event_ids_for_room"]
|
||||||
)
|
)
|
||||||
get_current_state_ids = (
|
|
||||||
StateStore.__dict__["get_current_state_ids"]
|
|
||||||
)
|
|
||||||
get_state_group_delta = StateStore.__dict__["get_state_group_delta"]
|
|
||||||
_get_joined_hosts_cache = RoomMemberStore.__dict__["_get_joined_hosts_cache"]
|
_get_joined_hosts_cache = RoomMemberStore.__dict__["_get_joined_hosts_cache"]
|
||||||
has_room_changed_since = DataStore.has_room_changed_since.__func__
|
has_room_changed_since = DataStore.has_room_changed_since.__func__
|
||||||
|
|
||||||
|
@ -134,12 +116,6 @@ class SlavedEventStore(BaseSlavedStore):
|
||||||
DataStore.get_room_events_stream_for_room.__func__
|
DataStore.get_room_events_stream_for_room.__func__
|
||||||
)
|
)
|
||||||
get_events_around = DataStore.get_events_around.__func__
|
get_events_around = DataStore.get_events_around.__func__
|
||||||
get_state_for_event = DataStore.get_state_for_event.__func__
|
|
||||||
get_state_for_events = DataStore.get_state_for_events.__func__
|
|
||||||
get_state_groups = DataStore.get_state_groups.__func__
|
|
||||||
get_state_groups_ids = DataStore.get_state_groups_ids.__func__
|
|
||||||
get_state_ids_for_event = DataStore.get_state_ids_for_event.__func__
|
|
||||||
get_state_ids_for_events = DataStore.get_state_ids_for_events.__func__
|
|
||||||
get_joined_users_from_state = DataStore.get_joined_users_from_state.__func__
|
get_joined_users_from_state = DataStore.get_joined_users_from_state.__func__
|
||||||
get_joined_users_from_context = DataStore.get_joined_users_from_context.__func__
|
get_joined_users_from_context = DataStore.get_joined_users_from_context.__func__
|
||||||
_get_joined_users_from_context = (
|
_get_joined_users_from_context = (
|
||||||
|
@ -169,10 +145,7 @@ class SlavedEventStore(BaseSlavedStore):
|
||||||
_get_rooms_for_user_where_membership_is_txn = (
|
_get_rooms_for_user_where_membership_is_txn = (
|
||||||
DataStore._get_rooms_for_user_where_membership_is_txn.__func__
|
DataStore._get_rooms_for_user_where_membership_is_txn.__func__
|
||||||
)
|
)
|
||||||
_get_state_for_groups = DataStore._get_state_for_groups.__func__
|
|
||||||
_get_all_state_from_cache = DataStore._get_all_state_from_cache.__func__
|
|
||||||
_get_events_around_txn = DataStore._get_events_around_txn.__func__
|
_get_events_around_txn = DataStore._get_events_around_txn.__func__
|
||||||
_get_some_state_from_cache = DataStore._get_some_state_from_cache.__func__
|
|
||||||
|
|
||||||
get_backfill_events = DataStore.get_backfill_events.__func__
|
get_backfill_events = DataStore.get_backfill_events.__func__
|
||||||
_get_backfill_events = DataStore._get_backfill_events.__func__
|
_get_backfill_events = DataStore._get_backfill_events.__func__
|
||||||
|
|
|
@ -16,8 +16,6 @@ import logging
|
||||||
|
|
||||||
from synapse.api.errors import StoreError
|
from synapse.api.errors import StoreError
|
||||||
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
|
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
|
||||||
from synapse.util.caches import CACHE_SIZE_FACTOR
|
|
||||||
from synapse.util.caches.dictionary_cache import DictionaryCache
|
|
||||||
from synapse.util.caches.descriptors import Cache
|
from synapse.util.caches.descriptors import Cache
|
||||||
from synapse.storage.engines import PostgresEngine
|
from synapse.storage.engines import PostgresEngine
|
||||||
import synapse.metrics
|
import synapse.metrics
|
||||||
|
@ -180,10 +178,6 @@ class SQLBaseStore(object):
|
||||||
self._get_event_cache = Cache("*getEvent*", keylen=3,
|
self._get_event_cache = Cache("*getEvent*", keylen=3,
|
||||||
max_entries=hs.config.event_cache_size)
|
max_entries=hs.config.event_cache_size)
|
||||||
|
|
||||||
self._state_group_cache = DictionaryCache(
|
|
||||||
"*stateGroupCache*", 100000 * CACHE_SIZE_FACTOR
|
|
||||||
)
|
|
||||||
|
|
||||||
self._event_fetch_lock = threading.Condition()
|
self._event_fetch_lock = threading.Condition()
|
||||||
self._event_fetch_list = []
|
self._event_fetch_list = []
|
||||||
self._event_fetch_ongoing = 0
|
self._event_fetch_ongoing = 0
|
||||||
|
|
|
@ -13,16 +13,18 @@
|
||||||
# See the License for the specific language governing permissions and
|
# See the License for the specific language governing permissions and
|
||||||
# limitations under the License.
|
# limitations under the License.
|
||||||
|
|
||||||
from ._base import SQLBaseStore
|
from collections import namedtuple
|
||||||
from synapse.util.caches.descriptors import cached, cachedList
|
import logging
|
||||||
from synapse.util.caches import intern_string
|
|
||||||
from synapse.util.stringutils import to_ascii
|
|
||||||
from synapse.storage.engines import PostgresEngine
|
|
||||||
|
|
||||||
from twisted.internet import defer
|
from twisted.internet import defer
|
||||||
from collections import namedtuple
|
|
||||||
|
|
||||||
import logging
|
from synapse.storage.background_updates import BackgroundUpdateStore
|
||||||
|
from synapse.storage.engines import PostgresEngine
|
||||||
|
from synapse.util.caches import intern_string, CACHE_SIZE_FACTOR
|
||||||
|
from synapse.util.caches.descriptors import cached, cachedList
|
||||||
|
from synapse.util.caches.dictionary_cache import DictionaryCache
|
||||||
|
from synapse.util.stringutils import to_ascii
|
||||||
|
from ._base import SQLBaseStore
|
||||||
|
|
||||||
logger = logging.getLogger(__name__)
|
logger = logging.getLogger(__name__)
|
||||||
|
|
||||||
|
@ -40,23 +42,11 @@ class _GetStateGroupDelta(namedtuple("_GetStateGroupDelta", ("prev_group", "delt
|
||||||
return len(self.delta_ids) if self.delta_ids else 0
|
return len(self.delta_ids) if self.delta_ids else 0
|
||||||
|
|
||||||
|
|
||||||
class StateStore(SQLBaseStore):
|
class StateGroupReadStore(SQLBaseStore):
|
||||||
""" Keeps track of the state at a given event.
|
"""The read-only parts of StateGroupStore
|
||||||
|
|
||||||
This is done by the concept of `state groups`. Every event is a assigned
|
None of these functions write to the state tables, so are suitable for
|
||||||
a state group (identified by an arbitrary string), which references a
|
including in the SlavedStores.
|
||||||
collection of state events. The current state of an event is then the
|
|
||||||
collection of state events referenced by the event's state group.
|
|
||||||
|
|
||||||
Hence, every change in the current state causes a new state group to be
|
|
||||||
generated. However, if no change happens (e.g., if we get a message event
|
|
||||||
with only one parent it inherits the state group from its parent.)
|
|
||||||
|
|
||||||
There are three tables:
|
|
||||||
* `state_groups`: Stores group name, first event with in the group and
|
|
||||||
room id.
|
|
||||||
* `event_to_state_groups`: Maps events to state groups.
|
|
||||||
* `state_groups_state`: Maps state group to state events.
|
|
||||||
"""
|
"""
|
||||||
|
|
||||||
STATE_GROUP_DEDUPLICATION_UPDATE_NAME = "state_group_state_deduplication"
|
STATE_GROUP_DEDUPLICATION_UPDATE_NAME = "state_group_state_deduplication"
|
||||||
|
@ -64,21 +54,10 @@ class StateStore(SQLBaseStore):
|
||||||
CURRENT_STATE_INDEX_UPDATE_NAME = "current_state_members_idx"
|
CURRENT_STATE_INDEX_UPDATE_NAME = "current_state_members_idx"
|
||||||
|
|
||||||
def __init__(self, db_conn, hs):
|
def __init__(self, db_conn, hs):
|
||||||
super(StateStore, self).__init__(db_conn, hs)
|
super(StateGroupReadStore, self).__init__(db_conn, hs)
|
||||||
self.register_background_update_handler(
|
|
||||||
self.STATE_GROUP_DEDUPLICATION_UPDATE_NAME,
|
self._state_group_cache = DictionaryCache(
|
||||||
self._background_deduplicate_state,
|
"*stateGroupCache*", 100000 * CACHE_SIZE_FACTOR
|
||||||
)
|
|
||||||
self.register_background_update_handler(
|
|
||||||
self.STATE_GROUP_INDEX_UPDATE_NAME,
|
|
||||||
self._background_index_state,
|
|
||||||
)
|
|
||||||
self.register_background_index_update(
|
|
||||||
self.CURRENT_STATE_INDEX_UPDATE_NAME,
|
|
||||||
index_name="current_state_events_member_index",
|
|
||||||
table="current_state_events",
|
|
||||||
columns=["state_key"],
|
|
||||||
where_clause="type='m.room.member'",
|
|
||||||
)
|
)
|
||||||
|
|
||||||
@cached(max_entries=100000, iterable=True)
|
@cached(max_entries=100000, iterable=True)
|
||||||
|
@ -190,178 +169,6 @@ class StateStore(SQLBaseStore):
|
||||||
for group, event_id_map in group_to_ids.iteritems()
|
for group, event_id_map in group_to_ids.iteritems()
|
||||||
})
|
})
|
||||||
|
|
||||||
def _have_persisted_state_group_txn(self, txn, state_group):
|
|
||||||
txn.execute(
|
|
||||||
"SELECT count(*) FROM state_groups WHERE id = ?",
|
|
||||||
(state_group,)
|
|
||||||
)
|
|
||||||
row = txn.fetchone()
|
|
||||||
return row and row[0]
|
|
||||||
|
|
||||||
def _store_mult_state_groups_txn(self, txn, events_and_contexts):
|
|
||||||
state_groups = {}
|
|
||||||
for event, context in events_and_contexts:
|
|
||||||
if event.internal_metadata.is_outlier():
|
|
||||||
continue
|
|
||||||
|
|
||||||
if context.current_state_ids is None:
|
|
||||||
# AFAIK, this can never happen
|
|
||||||
logger.error(
|
|
||||||
"Non-outlier event %s had current_state_ids==None",
|
|
||||||
event.event_id)
|
|
||||||
continue
|
|
||||||
|
|
||||||
# if the event was rejected, just give it the same state as its
|
|
||||||
# predecessor.
|
|
||||||
if context.rejected:
|
|
||||||
state_groups[event.event_id] = context.prev_group
|
|
||||||
continue
|
|
||||||
|
|
||||||
state_groups[event.event_id] = context.state_group
|
|
||||||
|
|
||||||
if self._have_persisted_state_group_txn(txn, context.state_group):
|
|
||||||
continue
|
|
||||||
|
|
||||||
self._simple_insert_txn(
|
|
||||||
txn,
|
|
||||||
table="state_groups",
|
|
||||||
values={
|
|
||||||
"id": context.state_group,
|
|
||||||
"room_id": event.room_id,
|
|
||||||
"event_id": event.event_id,
|
|
||||||
},
|
|
||||||
)
|
|
||||||
|
|
||||||
# We persist as a delta if we can, while also ensuring the chain
|
|
||||||
# of deltas isn't tooo long, as otherwise read performance degrades.
|
|
||||||
if context.prev_group:
|
|
||||||
is_in_db = self._simple_select_one_onecol_txn(
|
|
||||||
txn,
|
|
||||||
table="state_groups",
|
|
||||||
keyvalues={"id": context.prev_group},
|
|
||||||
retcol="id",
|
|
||||||
allow_none=True,
|
|
||||||
)
|
|
||||||
if not is_in_db:
|
|
||||||
raise Exception(
|
|
||||||
"Trying to persist state with unpersisted prev_group: %r"
|
|
||||||
% (context.prev_group,)
|
|
||||||
)
|
|
||||||
|
|
||||||
potential_hops = self._count_state_group_hops_txn(
|
|
||||||
txn, context.prev_group
|
|
||||||
)
|
|
||||||
if context.prev_group and potential_hops < MAX_STATE_DELTA_HOPS:
|
|
||||||
self._simple_insert_txn(
|
|
||||||
txn,
|
|
||||||
table="state_group_edges",
|
|
||||||
values={
|
|
||||||
"state_group": context.state_group,
|
|
||||||
"prev_state_group": context.prev_group,
|
|
||||||
},
|
|
||||||
)
|
|
||||||
|
|
||||||
self._simple_insert_many_txn(
|
|
||||||
txn,
|
|
||||||
table="state_groups_state",
|
|
||||||
values=[
|
|
||||||
{
|
|
||||||
"state_group": context.state_group,
|
|
||||||
"room_id": event.room_id,
|
|
||||||
"type": key[0],
|
|
||||||
"state_key": key[1],
|
|
||||||
"event_id": state_id,
|
|
||||||
}
|
|
||||||
for key, state_id in context.delta_ids.iteritems()
|
|
||||||
],
|
|
||||||
)
|
|
||||||
else:
|
|
||||||
self._simple_insert_many_txn(
|
|
||||||
txn,
|
|
||||||
table="state_groups_state",
|
|
||||||
values=[
|
|
||||||
{
|
|
||||||
"state_group": context.state_group,
|
|
||||||
"room_id": event.room_id,
|
|
||||||
"type": key[0],
|
|
||||||
"state_key": key[1],
|
|
||||||
"event_id": state_id,
|
|
||||||
}
|
|
||||||
for key, state_id in context.current_state_ids.iteritems()
|
|
||||||
],
|
|
||||||
)
|
|
||||||
|
|
||||||
# Prefill the state group cache with this group.
|
|
||||||
# It's fine to use the sequence like this as the state group map
|
|
||||||
# is immutable. (If the map wasn't immutable then this prefill could
|
|
||||||
# race with another update)
|
|
||||||
txn.call_after(
|
|
||||||
self._state_group_cache.update,
|
|
||||||
self._state_group_cache.sequence,
|
|
||||||
key=context.state_group,
|
|
||||||
value=dict(context.current_state_ids),
|
|
||||||
full=True,
|
|
||||||
)
|
|
||||||
|
|
||||||
self._simple_insert_many_txn(
|
|
||||||
txn,
|
|
||||||
table="event_to_state_groups",
|
|
||||||
values=[
|
|
||||||
{
|
|
||||||
"state_group": state_group_id,
|
|
||||||
"event_id": event_id,
|
|
||||||
}
|
|
||||||
for event_id, state_group_id in state_groups.iteritems()
|
|
||||||
],
|
|
||||||
)
|
|
||||||
|
|
||||||
for event_id, state_group_id in state_groups.iteritems():
|
|
||||||
txn.call_after(
|
|
||||||
self._get_state_group_for_event.prefill,
|
|
||||||
(event_id,), state_group_id
|
|
||||||
)
|
|
||||||
|
|
||||||
def _count_state_group_hops_txn(self, txn, state_group):
|
|
||||||
"""Given a state group, count how many hops there are in the tree.
|
|
||||||
|
|
||||||
This is used to ensure the delta chains don't get too long.
|
|
||||||
"""
|
|
||||||
if isinstance(self.database_engine, PostgresEngine):
|
|
||||||
sql = ("""
|
|
||||||
WITH RECURSIVE state(state_group) AS (
|
|
||||||
VALUES(?::bigint)
|
|
||||||
UNION ALL
|
|
||||||
SELECT prev_state_group FROM state_group_edges e, state s
|
|
||||||
WHERE s.state_group = e.state_group
|
|
||||||
)
|
|
||||||
SELECT count(*) FROM state;
|
|
||||||
""")
|
|
||||||
|
|
||||||
txn.execute(sql, (state_group,))
|
|
||||||
row = txn.fetchone()
|
|
||||||
if row and row[0]:
|
|
||||||
return row[0]
|
|
||||||
else:
|
|
||||||
return 0
|
|
||||||
else:
|
|
||||||
# We don't use WITH RECURSIVE on sqlite3 as there are distributions
|
|
||||||
# that ship with an sqlite3 version that doesn't support it (e.g. wheezy)
|
|
||||||
next_group = state_group
|
|
||||||
count = 0
|
|
||||||
|
|
||||||
while next_group:
|
|
||||||
next_group = self._simple_select_one_onecol_txn(
|
|
||||||
txn,
|
|
||||||
table="state_group_edges",
|
|
||||||
keyvalues={"state_group": next_group},
|
|
||||||
retcol="prev_state_group",
|
|
||||||
allow_none=True,
|
|
||||||
)
|
|
||||||
if next_group:
|
|
||||||
count += 1
|
|
||||||
|
|
||||||
return count
|
|
||||||
|
|
||||||
@defer.inlineCallbacks
|
@defer.inlineCallbacks
|
||||||
def _get_state_groups_from_groups(self, groups, types):
|
def _get_state_groups_from_groups(self, groups, types):
|
||||||
"""Returns dictionary state_group -> (dict of (type, state_key) -> event id)
|
"""Returns dictionary state_group -> (dict of (type, state_key) -> event id)
|
||||||
|
@ -742,6 +549,220 @@ class StateStore(SQLBaseStore):
|
||||||
|
|
||||||
defer.returnValue(results)
|
defer.returnValue(results)
|
||||||
|
|
||||||
|
|
||||||
|
class StateStore(StateGroupReadStore, BackgroundUpdateStore):
|
||||||
|
""" Keeps track of the state at a given event.
|
||||||
|
|
||||||
|
This is done by the concept of `state groups`. Every event is a assigned
|
||||||
|
a state group (identified by an arbitrary string), which references a
|
||||||
|
collection of state events. The current state of an event is then the
|
||||||
|
collection of state events referenced by the event's state group.
|
||||||
|
|
||||||
|
Hence, every change in the current state causes a new state group to be
|
||||||
|
generated. However, if no change happens (e.g., if we get a message event
|
||||||
|
with only one parent it inherits the state group from its parent.)
|
||||||
|
|
||||||
|
There are three tables:
|
||||||
|
* `state_groups`: Stores group name, first event with in the group and
|
||||||
|
room id.
|
||||||
|
* `event_to_state_groups`: Maps events to state groups.
|
||||||
|
* `state_groups_state`: Maps state group to state events.
|
||||||
|
"""
|
||||||
|
|
||||||
|
STATE_GROUP_DEDUPLICATION_UPDATE_NAME = "state_group_state_deduplication"
|
||||||
|
STATE_GROUP_INDEX_UPDATE_NAME = "state_group_state_type_index"
|
||||||
|
CURRENT_STATE_INDEX_UPDATE_NAME = "current_state_members_idx"
|
||||||
|
|
||||||
|
def __init__(self, db_conn, hs):
|
||||||
|
super(StateStore, self).__init__(db_conn, hs)
|
||||||
|
self.register_background_update_handler(
|
||||||
|
self.STATE_GROUP_DEDUPLICATION_UPDATE_NAME,
|
||||||
|
self._background_deduplicate_state,
|
||||||
|
)
|
||||||
|
self.register_background_update_handler(
|
||||||
|
self.STATE_GROUP_INDEX_UPDATE_NAME,
|
||||||
|
self._background_index_state,
|
||||||
|
)
|
||||||
|
self.register_background_index_update(
|
||||||
|
self.CURRENT_STATE_INDEX_UPDATE_NAME,
|
||||||
|
index_name="current_state_events_member_index",
|
||||||
|
table="current_state_events",
|
||||||
|
columns=["state_key"],
|
||||||
|
where_clause="type='m.room.member'",
|
||||||
|
)
|
||||||
|
|
||||||
|
def _have_persisted_state_group_txn(self, txn, state_group):
|
||||||
|
txn.execute(
|
||||||
|
"SELECT count(*) FROM state_groups WHERE id = ?",
|
||||||
|
(state_group,)
|
||||||
|
)
|
||||||
|
row = txn.fetchone()
|
||||||
|
return row and row[0]
|
||||||
|
|
||||||
|
def _store_mult_state_groups_txn(self, txn, events_and_contexts):
|
||||||
|
state_groups = {}
|
||||||
|
for event, context in events_and_contexts:
|
||||||
|
if event.internal_metadata.is_outlier():
|
||||||
|
continue
|
||||||
|
|
||||||
|
if context.current_state_ids is None:
|
||||||
|
# AFAIK, this can never happen
|
||||||
|
logger.error(
|
||||||
|
"Non-outlier event %s had current_state_ids==None",
|
||||||
|
event.event_id)
|
||||||
|
continue
|
||||||
|
|
||||||
|
# if the event was rejected, just give it the same state as its
|
||||||
|
# predecessor.
|
||||||
|
if context.rejected:
|
||||||
|
state_groups[event.event_id] = context.prev_group
|
||||||
|
continue
|
||||||
|
|
||||||
|
state_groups[event.event_id] = context.state_group
|
||||||
|
|
||||||
|
if self._have_persisted_state_group_txn(txn, context.state_group):
|
||||||
|
continue
|
||||||
|
|
||||||
|
self._simple_insert_txn(
|
||||||
|
txn,
|
||||||
|
table="state_groups",
|
||||||
|
values={
|
||||||
|
"id": context.state_group,
|
||||||
|
"room_id": event.room_id,
|
||||||
|
"event_id": event.event_id,
|
||||||
|
},
|
||||||
|
)
|
||||||
|
|
||||||
|
# We persist as a delta if we can, while also ensuring the chain
|
||||||
|
# of deltas isn't tooo long, as otherwise read performance degrades.
|
||||||
|
if context.prev_group:
|
||||||
|
is_in_db = self._simple_select_one_onecol_txn(
|
||||||
|
txn,
|
||||||
|
table="state_groups",
|
||||||
|
keyvalues={"id": context.prev_group},
|
||||||
|
retcol="id",
|
||||||
|
allow_none=True,
|
||||||
|
)
|
||||||
|
if not is_in_db:
|
||||||
|
raise Exception(
|
||||||
|
"Trying to persist state with unpersisted prev_group: %r"
|
||||||
|
% (context.prev_group,)
|
||||||
|
)
|
||||||
|
|
||||||
|
potential_hops = self._count_state_group_hops_txn(
|
||||||
|
txn, context.prev_group
|
||||||
|
)
|
||||||
|
if context.prev_group and potential_hops < MAX_STATE_DELTA_HOPS:
|
||||||
|
self._simple_insert_txn(
|
||||||
|
txn,
|
||||||
|
table="state_group_edges",
|
||||||
|
values={
|
||||||
|
"state_group": context.state_group,
|
||||||
|
"prev_state_group": context.prev_group,
|
||||||
|
},
|
||||||
|
)
|
||||||
|
|
||||||
|
self._simple_insert_many_txn(
|
||||||
|
txn,
|
||||||
|
table="state_groups_state",
|
||||||
|
values=[
|
||||||
|
{
|
||||||
|
"state_group": context.state_group,
|
||||||
|
"room_id": event.room_id,
|
||||||
|
"type": key[0],
|
||||||
|
"state_key": key[1],
|
||||||
|
"event_id": state_id,
|
||||||
|
}
|
||||||
|
for key, state_id in context.delta_ids.iteritems()
|
||||||
|
],
|
||||||
|
)
|
||||||
|
else:
|
||||||
|
self._simple_insert_many_txn(
|
||||||
|
txn,
|
||||||
|
table="state_groups_state",
|
||||||
|
values=[
|
||||||
|
{
|
||||||
|
"state_group": context.state_group,
|
||||||
|
"room_id": event.room_id,
|
||||||
|
"type": key[0],
|
||||||
|
"state_key": key[1],
|
||||||
|
"event_id": state_id,
|
||||||
|
}
|
||||||
|
for key, state_id in context.current_state_ids.iteritems()
|
||||||
|
],
|
||||||
|
)
|
||||||
|
|
||||||
|
# Prefill the state group cache with this group.
|
||||||
|
# It's fine to use the sequence like this as the state group map
|
||||||
|
# is immutable. (If the map wasn't immutable then this prefill could
|
||||||
|
# race with another update)
|
||||||
|
txn.call_after(
|
||||||
|
self._state_group_cache.update,
|
||||||
|
self._state_group_cache.sequence,
|
||||||
|
key=context.state_group,
|
||||||
|
value=dict(context.current_state_ids),
|
||||||
|
full=True,
|
||||||
|
)
|
||||||
|
|
||||||
|
self._simple_insert_many_txn(
|
||||||
|
txn,
|
||||||
|
table="event_to_state_groups",
|
||||||
|
values=[
|
||||||
|
{
|
||||||
|
"state_group": state_group_id,
|
||||||
|
"event_id": event_id,
|
||||||
|
}
|
||||||
|
for event_id, state_group_id in state_groups.iteritems()
|
||||||
|
],
|
||||||
|
)
|
||||||
|
|
||||||
|
for event_id, state_group_id in state_groups.iteritems():
|
||||||
|
txn.call_after(
|
||||||
|
self._get_state_group_for_event.prefill,
|
||||||
|
(event_id,), state_group_id
|
||||||
|
)
|
||||||
|
|
||||||
|
def _count_state_group_hops_txn(self, txn, state_group):
|
||||||
|
"""Given a state group, count how many hops there are in the tree.
|
||||||
|
|
||||||
|
This is used to ensure the delta chains don't get too long.
|
||||||
|
"""
|
||||||
|
if isinstance(self.database_engine, PostgresEngine):
|
||||||
|
sql = ("""
|
||||||
|
WITH RECURSIVE state(state_group) AS (
|
||||||
|
VALUES(?::bigint)
|
||||||
|
UNION ALL
|
||||||
|
SELECT prev_state_group FROM state_group_edges e, state s
|
||||||
|
WHERE s.state_group = e.state_group
|
||||||
|
)
|
||||||
|
SELECT count(*) FROM state;
|
||||||
|
""")
|
||||||
|
|
||||||
|
txn.execute(sql, (state_group,))
|
||||||
|
row = txn.fetchone()
|
||||||
|
if row and row[0]:
|
||||||
|
return row[0]
|
||||||
|
else:
|
||||||
|
return 0
|
||||||
|
else:
|
||||||
|
# We don't use WITH RECURSIVE on sqlite3 as there are distributions
|
||||||
|
# that ship with an sqlite3 version that doesn't support it (e.g. wheezy)
|
||||||
|
next_group = state_group
|
||||||
|
count = 0
|
||||||
|
|
||||||
|
while next_group:
|
||||||
|
next_group = self._simple_select_one_onecol_txn(
|
||||||
|
txn,
|
||||||
|
table="state_group_edges",
|
||||||
|
keyvalues={"state_group": next_group},
|
||||||
|
retcol="prev_state_group",
|
||||||
|
allow_none=True,
|
||||||
|
)
|
||||||
|
if next_group:
|
||||||
|
count += 1
|
||||||
|
|
||||||
|
return count
|
||||||
|
|
||||||
def get_next_state_group(self):
|
def get_next_state_group(self):
|
||||||
return self._state_groups_id_gen.get_next()
|
return self._state_groups_id_gen.get_next()
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue