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0e719f2398
For in memory streams when fetching updates on workers we need to query the source of the stream, which currently is hard coded to be master. This PR threads through the source instance we received via `POSITION` through to the update function in each stream, which can then be passed to the replication client for in memory streams.
83 lines
2.6 KiB
Python
83 lines
2.6 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/<stream name>?from_token=0&to_token=10
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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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If there are more rows than can sensibly be returned in one lump, `limited` will be
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set to true, and the caller should call again with a new `from_token`.
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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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self._instance_name = hs.get_instance_name()
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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):
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return {"from_token": from_token, "upto_token": upto_token}
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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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updates, upto_token, limited = await stream.get_updates_since(
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self._instance_name, from_token, upto_token
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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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