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Linearize calls to _generate_user_id

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This commit is contained in:
Erik Johnston 2018-03-26 12:02:20 +01:00
parent 84b5cc69f5
commit a052aa42e7
1 changed files with 7 additions and 4 deletions
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11
synapse/handlers/register.py
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@ -24,7 +24,7 @@ from synapse.api.errors import (
from synapse.http.client import CaptchaServerHttpClient
from synapse import types
from synapse.types import UserID
from synapse.util.async import run_on_reactor
from synapse.util.async import run_on_reactor, Linearizer
from synapse.util.threepids import check_3pid_allowed
from ._base import BaseHandler
@ -46,6 +46,8 @@ class RegistrationHandler(BaseHandler):
self.macaroon_gen = hs.get_macaroon_generator()
self._generate_user_id_linearizer = Linearizer(name="_generate_user_id_linearizer")
@defer.inlineCallbacks
def check_username(self, localpart, guest_access_token=None,
assigned_user_id=None):
@ -345,9 +347,10 @@ class RegistrationHandler(BaseHandler):
@defer.inlineCallbacks
def _generate_user_id(self, reseed=False):
if reseed or self._next_generated_user_id is None:
self._next_generated_user_id = (
yield self.store.find_next_generated_user_id_localpart()
)
with (yield self._generate_user_id_linearizer.queue(())):
self._next_generated_user_id = (
yield self.store.find_next_generated_user_id_localpart()
)
id = self._next_generated_user_id
self._next_generated_user_id += 1