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Convert EventContext to attrs (#6218) 

* make EventContext use an attr
pull/6264/head
Richard van der Hoff 2019-10-28 12:29:55 +00:00 committed by Amber Brown
parent da78f61778
commit 9aee28927b
3 changed files with 45 additions and 61 deletions
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1
changelog.d/6218.misc Normal file
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@ -0,0 +1 @@
Convert EventContext to an attrs.

98
synapse/events/snapshot.py
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@ -12,9 +12,9 @@
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from six import iteritems
import attr
from frozendict import frozendict
from twisted.internet import defer
@ -22,7 +22,8 @@ from twisted.internet import defer
from synapse.logging.context import make_deferred_yieldable, run_in_background
class EventContext(object):
@attr.s(slots=True)
class EventContext:
"""
Attributes:
state_group (int|None): state group id, if the state has been stored
@ -31,9 +32,6 @@ class EventContext(object):
rejected (bool|str): A rejection reason if the event was rejected, else
False
push_actions (list[(str, list[object])]): list of (user_id, actions)
tuples
prev_group (int): Previously persisted state group. ``None`` for an
outlier.
delta_ids (dict[(str, str), str]): Delta from ``prev_group``.
@ -42,6 +40,8 @@ class EventContext(object):
prev_state_events (?): XXX: is this ever set to anything other than
the empty list?
app_service: FIXME
_current_state_ids (dict[(str, str), str]|None):
The current state map including the current event. None if outlier
or we haven't fetched the state from DB yet.
@ -67,49 +67,33 @@ class EventContext(object):
Only set when state has not been fetched yet.
"""
__slots__ = [
"state_group",
"rejected",
"prev_group",
"delta_ids",
"prev_state_events",
"app_service",
"_current_state_ids",
"_prev_state_ids",
"_prev_state_id",
"_event_type",
"_event_state_key",
"_fetching_state_deferred",
]
state_group = attr.ib(default=None)
rejected = attr.ib(default=False)
prev_group = attr.ib(default=None)
delta_ids = attr.ib(default=None)
prev_state_events = attr.ib(default=attr.Factory(list))
app_service = attr.ib(default=None)
def __init__(self):
self.prev_state_events = []
self.rejected = False
self.app_service = None
_current_state_ids = attr.ib(default=None)
_prev_state_ids = attr.ib(default=None)
_prev_state_id = attr.ib(default=None)
_event_type = attr.ib(default=None)
_event_state_key = attr.ib(default=None)
_fetching_state_deferred = attr.ib(default=None)
@staticmethod
def with_state(
state_group, current_state_ids, prev_state_ids, prev_group=None, delta_ids=None
):
context = EventContext()
# The current state including the current event
context._current_state_ids = current_state_ids
# The current state excluding the current event
context._prev_state_ids = prev_state_ids
context.state_group = state_group
context._prev_state_id = None
context._event_type = None
context._event_state_key = None
context._fetching_state_deferred = defer.succeed(None)
# A previously persisted state group and a delta between that
# and this state.
context.prev_group = prev_group
context.delta_ids = delta_ids
return context
return EventContext(
current_state_ids=current_state_ids,
prev_state_ids=prev_state_ids,
state_group=state_group,
fetching_state_deferred=defer.succeed(None),
prev_group=prev_group,
delta_ids=delta_ids,
)
@defer.inlineCallbacks
def serialize(self, event, store):
@ -157,24 +141,18 @@ class EventContext(object):
Returns:
EventContext
"""
context = EventContext()
# We use the state_group and prev_state_id stuff to pull the
# current_state_ids out of the DB and construct prev_state_ids.
context._prev_state_id = input["prev_state_id"]
context._event_type = input["event_type"]
context._event_state_key = input["event_state_key"]
context._current_state_ids = None
context._prev_state_ids = None
context._fetching_state_deferred = None
context.state_group = input["state_group"]
context.prev_group = input["prev_group"]
context.delta_ids = _decode_state_dict(input["delta_ids"])
context.rejected = input["rejected"]
context.prev_state_events = input["prev_state_events"]
context = EventContext(
# We use the state_group and prev_state_id stuff to pull the
# current_state_ids out of the DB and construct prev_state_ids.
prev_state_id=input["prev_state_id"],
event_type=input["event_type"],
event_state_key=input["event_state_key"],
state_group=input["state_group"],
prev_group=input["prev_group"],
delta_ids=_decode_state_dict(input["delta_ids"]),
rejected=input["rejected"],
prev_state_events=input["prev_state_events"],
)
app_service_id = input["app_service_id"]
if app_service_id:

7
synapse/storage/data_stores/main/state.py
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@ -15,6 +15,7 @@
import logging
from collections import namedtuple
from typing import Iterable, Tuple
from six import iteritems, itervalues
from six.moves import range
@ -23,6 +24,8 @@ from twisted.internet import defer
from synapse.api.constants import EventTypes
from synapse.api.errors import NotFoundError
from synapse.events import EventBase
from synapse.events.snapshot import EventContext
from synapse.storage._base import SQLBaseStore
from synapse.storage.background_updates import BackgroundUpdateStore
from synapse.storage.data_stores.main.events_worker import EventsWorkerStore
@ -1215,7 +1218,9 @@ class StateStore(StateGroupWorkerStore, StateBackgroundUpdateStore):
def __init__(self, db_conn, hs):
super(StateStore, self).__init__(db_conn, hs)
def _store_event_state_mappings_txn(self, txn, events_and_contexts):
def _store_event_state_mappings_txn(
self, txn, events_and_contexts: Iterable[Tuple[EventBase, EventContext]]
):
state_groups = {}
for event, context in events_and_contexts:
if event.internal_metadata.is_outlier():