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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.
56 lines
2.1 KiB
Python
56 lines
2.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2017 Vector Creations Ltd
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# Copyright 2019 New Vector Ltd
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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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from collections import namedtuple
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from synapse.replication.tcp.streams._base import Stream, db_query_to_update_function
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class FederationStream(Stream):
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"""Data to be sent over federation. Only available when master has federation
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sending disabled.
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"""
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FederationStreamRow = namedtuple(
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"FederationStreamRow",
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(
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"type", # str, the type of data as defined in the BaseFederationRows
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"data", # dict, serialization of a federation.send_queue.BaseFederationRow
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),
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)
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NAME = "federation"
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ROW_TYPE = FederationStreamRow
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def __init__(self, hs):
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# Not all synapse instances will have a federation sender instance,
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# whether that's a `FederationSender` or a `FederationRemoteSendQueue`,
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# so we stub the stream out when that is the case.
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if hs.config.worker_app is None or hs.should_send_federation():
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federation_sender = hs.get_federation_sender()
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current_token = federation_sender.get_current_token
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update_function = db_query_to_update_function(
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federation_sender.get_replication_rows
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)
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else:
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current_token = lambda: 0
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update_function = self._stub_update_function
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super().__init__(hs.get_instance_name(), current_token, update_function)
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@staticmethod
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async def _stub_update_function(instance_name, from_token, upto_token, limit):
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return [], upto_token, False
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