81 lines
3.0 KiB
Python
81 lines
3.0 KiB
Python
# 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 typing import TYPE_CHECKING, Any, Awaitable, Callable, List, Tuple
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from synapse.replication.tcp.streams._base import (
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Stream,
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current_token_without_instance,
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make_http_update_function,
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)
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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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: "HomeServer"):
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if hs.config.worker.worker_app is None:
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# master process: get updates from the FederationRemoteSendQueue.
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# (if the master is configured to send federation itself, federation_sender
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# will be a real FederationSender, which has stubs for current_token and
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# get_replication_rows.)
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federation_sender = hs.get_federation_sender()
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current_token = current_token_without_instance(
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federation_sender.get_current_token
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)
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update_function: Callable[
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[str, int, int, int], Awaitable[Tuple[List[Tuple[int, Any]], int, bool]]
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] = federation_sender.get_replication_rows
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elif hs.should_send_federation():
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# federation sender: Query master process
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update_function = make_http_update_function(hs, self.NAME)
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current_token = self._stub_current_token
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else:
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# other worker: stub out the update function (we're not interested in
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# any updates so when we get a POSITION we do nothing)
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update_function = self._stub_update_function
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current_token = self._stub_current_token
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super().__init__(hs.get_instance_name(), current_token, update_function)
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@staticmethod
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def _stub_current_token(instance_name: str) -> int:
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# dummy current-token method for use on workers
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return 0
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@staticmethod
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async def _stub_update_function(
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instance_name: str, from_token: int, upto_token: int, limit: int
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) -> Tuple[list, int, bool]:
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return [], upto_token, False
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