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# Copyright 2022 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.
import logging
from typing import TYPE_CHECKING, Tuple
from twisted.web.server import Request
from synapse.api.errors import SynapseError
from synapse.http.server import HttpServer
from synapse.replication.http._base import ReplicationEndpoint
from synapse.types import JsonDict
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class ReplicationUpdateCurrentStateRestServlet(ReplicationEndpoint):
"""Recalculates the current state for a room, and persists it.
The API looks like:
POST /_synapse/replication/update_current_state/:room_id
{}
200 OK
{}
"""
NAME = "update_current_state"
PATH_ARGS = ("room_id",)
def __init__(self, hs: "HomeServer"):
super().__init__(hs)
self._state_handler = hs.get_state_handler()
self._events_shard_config = hs.config.worker.events_shard_config
self._instance_name = hs.get_instance_name()
@staticmethod
async def _serialize_payload(room_id: str) -> JsonDict: # type: ignore[override]
return {}
async def _handle_request( # type: ignore[override]
self, request: Request, room_id: str
) -> Tuple[int, JsonDict]:
writer_instance = self._events_shard_config.get_instance(room_id)
if writer_instance != self._instance_name:
raise SynapseError(
400, "/update_current_state request was routed to the wrong worker"
)
await self._state_handler.update_current_state(room_id)
return 200, {}
def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
if hs.get_instance_name() in hs.config.worker.writers.events:
ReplicationUpdateCurrentStateRestServlet(hs).register(http_server)
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