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https://git.anonymousland.org/anonymousland/synapse-product.git
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5016b162fc
The aim here is to move the command handling out of the TCP protocol classes and to also merge the client and server command handling (so that we can reuse them for redis protocol). This PR simply moves the client paths to the new `ReplicationCommandHandler`, a future PR will move the server paths too.
125 lines
4.5 KiB
Python
125 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2017 Vector Creations 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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"""A replication client for use by synapse workers.
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"""
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import logging
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from typing import TYPE_CHECKING, Dict
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from twisted.internet.protocol import ReconnectingClientFactory
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from synapse.replication.slave.storage._base import BaseSlavedStore
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from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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from synapse.replication.tcp.handler import ReplicationCommandHandler
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logger = logging.getLogger(__name__)
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class ReplicationClientFactory(ReconnectingClientFactory):
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"""Factory for building connections to the master. Will reconnect if the
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connection is lost.
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Accepts a handler that is passed to `ClientReplicationStreamProtocol`.
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"""
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initialDelay = 0.1
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maxDelay = 1 # Try at least once every N seconds
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def __init__(
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self,
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hs: "HomeServer",
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client_name: str,
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command_handler: "ReplicationCommandHandler",
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):
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self.client_name = client_name
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self.command_handler = command_handler
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self.server_name = hs.config.server_name
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self.hs = hs
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self._clock = hs.get_clock() # As self.clock is defined in super class
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hs.get_reactor().addSystemEventTrigger("before", "shutdown", self.stopTrying)
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def startedConnecting(self, connector):
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logger.info("Connecting to replication: %r", connector.getDestination())
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def buildProtocol(self, addr):
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logger.info("Connected to replication: %r", addr)
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return ClientReplicationStreamProtocol(
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self.hs,
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self.client_name,
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self.server_name,
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self._clock,
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self.command_handler,
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)
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def clientConnectionLost(self, connector, reason):
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logger.error("Lost replication conn: %r", reason)
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ReconnectingClientFactory.clientConnectionLost(self, connector, reason)
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def clientConnectionFailed(self, connector, reason):
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logger.error("Failed to connect to replication: %r", reason)
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ReconnectingClientFactory.clientConnectionFailed(self, connector, reason)
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class ReplicationDataHandler:
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"""Handles incoming stream updates from replication.
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This instance notifies the slave data store about updates. Can be subclassed
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to handle updates in additional ways.
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"""
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def __init__(self, store: BaseSlavedStore):
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self.store = store
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async def on_rdata(self, stream_name: str, token: int, rows: list):
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"""Called to handle a batch of replication data with a given stream token.
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By default this just pokes the slave store. Can be overridden in subclasses to
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handle more.
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Args:
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stream_name (str): name of the replication stream for this batch of rows
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token (int): stream token for this batch of rows
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rows (list): a list of Stream.ROW_TYPE objects as returned by
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Stream.parse_row.
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"""
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self.store.process_replication_rows(stream_name, token, rows)
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def get_streams_to_replicate(self) -> Dict[str, int]:
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"""Called when a new connection has been established and we need to
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subscribe to streams.
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Returns:
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map from stream name to the most recent update we have for
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that stream (ie, the point we want to start replicating from)
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"""
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args = self.store.stream_positions()
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user_account_data = args.pop("user_account_data", None)
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room_account_data = args.pop("room_account_data", None)
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if user_account_data:
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args["account_data"] = user_account_data
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elif room_account_data:
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args["account_data"] = room_account_data
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return args
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async def on_position(self, stream_name: str, token: int):
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self.store.process_replication_rows(stream_name, token, [])
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def on_remote_server_up(self, server: str):
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"""Called when get a new REMOTE_SERVER_UP command."""
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