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This changes the replication protocol so that the server does not send down `RDATA` for rows that happened before the client connected. Instead, the server will send a `POSITION` and clients then query the database (or master out of band) to get up to date.
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2020 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from synapse.api.errors import SynapseError
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from synapse.http.servlet import parse_integer
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from synapse.replication.http._base import ReplicationEndpoint
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logger = logging.getLogger(__name__)
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class ReplicationGetStreamUpdates(ReplicationEndpoint):
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"""Fetches stream updates from a server. Used for streams not persisted to
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the database, e.g. typing notifications.
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The API looks like:
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GET /_synapse/replication/get_repl_stream_updates/events?from_token=0&to_token=10&limit=100
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200 OK
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{
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updates: [ ... ],
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upto_token: 10,
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limited: False,
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}
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"""
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NAME = "get_repl_stream_updates"
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PATH_ARGS = ("stream_name",)
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METHOD = "GET"
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def __init__(self, hs):
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super().__init__(hs)
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# We pull the streams from the replication steamer (if we try and make
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# them ourselves we end up in an import loop).
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self.streams = hs.get_replication_streamer().get_streams()
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@staticmethod
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def _serialize_payload(stream_name, from_token, upto_token, limit):
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return {"from_token": from_token, "upto_token": upto_token, "limit": limit}
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async def _handle_request(self, request, stream_name):
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stream = self.streams.get(stream_name)
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if stream is None:
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raise SynapseError(400, "Unknown stream")
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from_token = parse_integer(request, "from_token", required=True)
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upto_token = parse_integer(request, "upto_token", required=True)
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limit = parse_integer(request, "limit", required=True)
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updates, upto_token, limited = await stream.get_updates_since(
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from_token, upto_token, limit
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)
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return (
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200,
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{"updates": updates, "upto_token": upto_token, "limited": limited},
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)
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def register_servlets(hs, http_server):
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ReplicationGetStreamUpdates(hs).register(http_server)
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