diff --git a/scripts/synapse_port_db b/scripts/synapse_port_db
index 2eb795192f..22a6abd7d2 100755
--- a/scripts/synapse_port_db
+++ b/scripts/synapse_port_db
@@ -48,6 +48,7 @@ from synapse.storage.data_stores.main.media_repository import (
)
from synapse.storage.data_stores.main.registration import (
RegistrationBackgroundUpdateStore,
+ find_max_generated_user_id_localpart,
)
from synapse.storage.data_stores.main.room import RoomBackgroundUpdateStore
from synapse.storage.data_stores.main.roommember import RoomMemberBackgroundUpdateStore
@@ -622,8 +623,10 @@ class Porter(object):
)
)
- # Step 5. Do final post-processing
+ # Step 5. Set up sequences
+ self.progress.set_state("Setting up sequence generators")
await self._setup_state_group_id_seq()
+ await self._setup_user_id_seq()
self.progress.done()
except Exception as e:
@@ -793,6 +796,13 @@ class Porter(object):
return self.postgres_store.db.runInteraction("setup_state_group_id_seq", r)
+ def _setup_user_id_seq(self):
+ def r(txn):
+ next_id = find_max_generated_user_id_localpart(txn) + 1
+ txn.execute("ALTER SEQUENCE user_id_seq RESTART WITH %s", (next_id,))
+
+ return self.postgres_store.db.runInteraction("setup_user_id_seq", r)
+
##############################################
# The following is simply UI stuff
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index 78c3772ac1..501f0fe795 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -28,7 +28,6 @@ from synapse.replication.http.register import (
)
from synapse.storage.state import StateFilter
from synapse.types import RoomAlias, UserID, create_requester
-from synapse.util.async_helpers import Linearizer
from ._base import BaseHandler
@@ -50,14 +49,7 @@ class RegistrationHandler(BaseHandler):
self.user_directory_handler = hs.get_user_directory_handler()
self.identity_handler = self.hs.get_handlers().identity_handler
self.ratelimiter = hs.get_registration_ratelimiter()
-
- self._next_generated_user_id = None
-
self.macaroon_gen = hs.get_macaroon_generator()
-
- self._generate_user_id_linearizer = Linearizer(
- name="_generate_user_id_linearizer"
- )
self._server_notices_mxid = hs.config.server_notices_mxid
if hs.config.worker_app:
@@ -219,7 +211,7 @@ class RegistrationHandler(BaseHandler):
if fail_count > 10:
raise SynapseError(500, "Unable to find a suitable guest user ID")
- localpart = await self._generate_user_id()
+ localpart = await self.store.generate_user_id()
user = UserID(localpart, self.hs.hostname)
user_id = user.to_string()
self.check_user_id_not_appservice_exclusive(user_id)
@@ -510,18 +502,6 @@ class RegistrationHandler(BaseHandler):
errcode=Codes.EXCLUSIVE,
)
- async def _generate_user_id(self):
- if self._next_generated_user_id is None:
- with await self._generate_user_id_linearizer.queue(()):
- if self._next_generated_user_id is None:
- self._next_generated_user_id = (
- await self.store.find_next_generated_user_id_localpart()
- )
-
- id = self._next_generated_user_id
- self._next_generated_user_id += 1
- return str(id)
-
def check_registration_ratelimit(self, address):
"""A simple helper method to check whether the registration rate limit has been hit
for a given IP address
diff --git a/synapse/storage/data_stores/main/registration.py b/synapse/storage/data_stores/main/registration.py
index 587d4b91c1..27d2c5028c 100644
--- a/synapse/storage/data_stores/main/registration.py
+++ b/synapse/storage/data_stores/main/registration.py
@@ -27,6 +27,8 @@ from synapse.api.errors import Codes, StoreError, SynapseError, ThreepidValidati
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage._base import SQLBaseStore
from synapse.storage.database import Database
+from synapse.storage.types import Cursor
+from synapse.storage.util.sequence import build_sequence_generator
from synapse.types import UserID
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
@@ -42,6 +44,10 @@ class RegistrationWorkerStore(SQLBaseStore):
self.config = hs.config
self.clock = hs.get_clock()
+ self._user_id_seq = build_sequence_generator(
+ database.engine, find_max_generated_user_id_localpart, "user_id_seq",
+ )
+
@cached()
def get_user_by_id(self, user_id):
return self.db.simple_select_one(
@@ -481,39 +487,17 @@ class RegistrationWorkerStore(SQLBaseStore):
ret = yield self.db.runInteraction("count_real_users", _count_users)
return ret
- @defer.inlineCallbacks
- def find_next_generated_user_id_localpart(self):
- """
- Gets the localpart of the next generated user ID.
+ async def generate_user_id(self) -> str:
+ """Generate a suitable localpart for a guest user
- Generated user IDs are integers, so we find the largest integer user ID
- already taken and return that plus one.
+ Returns: a (hopefully) free localpart
"""
-
- def _find_next_generated_user_id(txn):
- # We bound between '@0' and '@a' to avoid pulling the entire table
- # out.
- txn.execute("SELECT name FROM users WHERE '@0' <= name AND name < '@a'")
-
- regex = re.compile(r"^@(\d+):")
-
- max_found = 0
-
- for (user_id,) in txn:
- match = regex.search(user_id)
- if match:
- max_found = max(int(match.group(1)), max_found)
-
- return max_found + 1
-
- return (
- (
- yield self.db.runInteraction(
- "find_next_generated_user_id", _find_next_generated_user_id
- )
- )
+ next_id = await self.db.runInteraction(
+ "generate_user_id", self._user_id_seq.get_next_id_txn
)
+ return str(next_id)
+
async def get_user_id_by_threepid(self, medium: str, address: str) -> Optional[str]:
"""Returns user id from threepid
@@ -1573,3 +1557,26 @@ class RegistrationStore(RegistrationBackgroundUpdateStore):
keyvalues={"user_id": user_id},
values={"expiration_ts_ms": expiration_ts, "email_sent": False},
)
+
+
+def find_max_generated_user_id_localpart(cur: Cursor) -> int:
+ """
+ Gets the localpart of the max current generated user ID.
+
+ Generated user IDs are integers, so we find the largest integer user ID
+ already taken and return that.
+ """
+
+ # We bound between '@0' and '@a' to avoid pulling the entire table
+ # out.
+ cur.execute("SELECT name FROM users WHERE '@0' <= name AND name < '@a'")
+
+ regex = re.compile(r"^@(\d+):")
+
+ max_found = 0
+
+ for (user_id,) in cur:
+ match = regex.search(user_id)
+ if match:
+ max_found = max(int(match.group(1)), max_found)
+ return max_found
diff --git a/synapse/storage/data_stores/main/schema/delta/58/11user_id_seq.py b/synapse/storage/data_stores/main/schema/delta/58/11user_id_seq.py
new file mode 100644
index 0000000000..2011f6bceb
--- /dev/null
+++ b/synapse/storage/data_stores/main/schema/delta/58/11user_id_seq.py
@@ -0,0 +1,34 @@
+# Copyright 2020 The Matrix.org Foundation C.I.C.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+
+"""
+Adds a postgres SEQUENCE for generating guest user IDs.
+"""
+
+from synapse.storage.data_stores.main.registration import (
+ find_max_generated_user_id_localpart,
+)
+from synapse.storage.engines import PostgresEngine
+
+
+def run_create(cur, database_engine, *args, **kwargs):
+ if not isinstance(database_engine, PostgresEngine):
+ return
+
+ next_id = find_max_generated_user_id_localpart(cur) + 1
+ cur.execute("CREATE SEQUENCE user_id_seq START WITH %s", (next_id,))
+
+
+def run_upgrade(*args, **kwargs):
+ pass
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