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https://github.com/element-hq/synapse.git
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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.
301 lines
9.7 KiB
Python
301 lines
9.7 KiB
Python
# -*- coding: utf-8 -*-
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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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import logging
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from typing import Any, List, Optional, Tuple
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import attr
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from twisted.internet.interfaces import IConsumer, IPullProducer, IReactorTime
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from twisted.internet.task import LoopingCall
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from twisted.web.http import HTTPChannel
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from synapse.app.generic_worker import (
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GenericWorkerReplicationHandler,
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GenericWorkerServer,
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)
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from synapse.http.site import SynapseRequest
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from synapse.replication.tcp.handler import ReplicationCommandHandler
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from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
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from synapse.replication.tcp.resource import ReplicationStreamProtocolFactory
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from synapse.server import HomeServer
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from synapse.util import Clock
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from tests import unittest
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from tests.server import FakeTransport
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logger = logging.getLogger(__name__)
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class BaseStreamTestCase(unittest.HomeserverTestCase):
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"""Base class for tests of the replication streams"""
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def prepare(self, reactor, clock, hs):
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# build a replication server
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server_factory = ReplicationStreamProtocolFactory(hs)
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self.streamer = hs.get_replication_streamer()
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self.server = server_factory.buildProtocol(None)
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# Make a new HomeServer object for the worker
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config = self.default_config()
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config["worker_app"] = "synapse.app.generic_worker"
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config["worker_replication_host"] = "testserv"
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config["worker_replication_http_port"] = "8765"
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self.reactor.lookups["testserv"] = "1.2.3.4"
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self.worker_hs = self.setup_test_homeserver(
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http_client=None,
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homeserverToUse=GenericWorkerServer,
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config=config,
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reactor=self.reactor,
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)
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# Since we use sqlite in memory databases we need to make sure the
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# databases objects are the same.
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self.worker_hs.get_datastore().db = hs.get_datastore().db
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self.test_handler = self._build_replication_data_handler()
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self.worker_hs.replication_data_handler = self.test_handler
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repl_handler = ReplicationCommandHandler(self.worker_hs)
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self.client = ClientReplicationStreamProtocol(
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self.worker_hs, "client", "test", clock, repl_handler,
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)
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self._client_transport = None
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self._server_transport = None
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def _build_replication_data_handler(self):
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return TestReplicationDataHandler(self.worker_hs)
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def reconnect(self):
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if self._client_transport:
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self.client.close()
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if self._server_transport:
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self.server.close()
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self._client_transport = FakeTransport(self.server, self.reactor)
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self.client.makeConnection(self._client_transport)
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self._server_transport = FakeTransport(self.client, self.reactor)
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self.server.makeConnection(self._server_transport)
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def disconnect(self):
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if self._client_transport:
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self._client_transport = None
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self.client.close()
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if self._server_transport:
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self._server_transport = None
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self.server.close()
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def replicate(self):
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"""Tell the master side of replication that something has happened, and then
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wait for the replication to occur.
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"""
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self.streamer.on_notifier_poke()
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self.pump(0.1)
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def handle_http_replication_attempt(self) -> SynapseRequest:
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"""Asserts that a connection attempt was made to the master HS on the
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HTTP replication port, then proxies it to the master HS object to be
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handled.
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Returns:
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The request object received by master HS.
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"""
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# We should have an outbound connection attempt.
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clients = self.reactor.tcpClients
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self.assertEqual(len(clients), 1)
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(host, port, client_factory, _timeout, _bindAddress) = clients.pop(0)
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self.assertEqual(host, "1.2.3.4")
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self.assertEqual(port, 8765)
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# Set up client side protocol
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client_protocol = client_factory.buildProtocol(None)
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request_factory = OneShotRequestFactory()
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# Set up the server side protocol
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channel = _PushHTTPChannel(self.reactor)
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channel.requestFactory = request_factory
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channel.site = self.site
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# Connect client to server and vice versa.
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client_to_server_transport = FakeTransport(
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channel, self.reactor, client_protocol
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)
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client_protocol.makeConnection(client_to_server_transport)
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server_to_client_transport = FakeTransport(
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client_protocol, self.reactor, channel
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)
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channel.makeConnection(server_to_client_transport)
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# The request will now be processed by `self.site` and the response
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# streamed back.
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self.reactor.advance(0)
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# We tear down the connection so it doesn't get reused without our
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# knowledge.
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server_to_client_transport.loseConnection()
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client_to_server_transport.loseConnection()
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return request_factory.request
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def assert_request_is_get_repl_stream_updates(
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self, request: SynapseRequest, stream_name: str
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):
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"""Asserts that the given request is a HTTP replication request for
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fetching updates for given stream.
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"""
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self.assertRegex(
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request.path,
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br"^/_synapse/replication/get_repl_stream_updates/%s/[^/]+$"
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% (stream_name.encode("ascii"),),
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)
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self.assertEqual(request.method, b"GET")
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class TestReplicationDataHandler(GenericWorkerReplicationHandler):
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"""Drop-in for ReplicationDataHandler which just collects RDATA rows"""
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def __init__(self, hs: HomeServer):
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super().__init__(hs)
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# list of received (stream_name, token, row) tuples
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self.received_rdata_rows = [] # type: List[Tuple[str, int, Any]]
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async def on_rdata(self, stream_name, instance_name, token, rows):
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await super().on_rdata(stream_name, instance_name, token, rows)
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for r in rows:
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self.received_rdata_rows.append((stream_name, token, r))
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@attr.s()
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class OneShotRequestFactory:
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"""A simple request factory that generates a single `SynapseRequest` and
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stores it for future use. Can only be used once.
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"""
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request = attr.ib(default=None)
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def __call__(self, *args, **kwargs):
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assert self.request is None
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self.request = SynapseRequest(*args, **kwargs)
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return self.request
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class _PushHTTPChannel(HTTPChannel):
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"""A HTTPChannel that wraps pull producers to push producers.
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This is a hack to get around the fact that HTTPChannel transparently wraps a
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pull producer (which is what Synapse uses to reply to requests) with
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`_PullToPush` to convert it to a push producer. Unfortunately `_PullToPush`
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uses the standard reactor rather than letting us use our test reactor, which
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makes it very hard to test.
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"""
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def __init__(self, reactor: IReactorTime):
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super().__init__()
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self.reactor = reactor
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self._pull_to_push_producer = None # type: Optional[_PullToPushProducer]
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def registerProducer(self, producer, streaming):
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# Convert pull producers to push producer.
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if not streaming:
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self._pull_to_push_producer = _PullToPushProducer(
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self.reactor, producer, self
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)
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producer = self._pull_to_push_producer
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super().registerProducer(producer, True)
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def unregisterProducer(self):
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if self._pull_to_push_producer:
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# We need to manually stop the _PullToPushProducer.
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self._pull_to_push_producer.stop()
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class _PullToPushProducer:
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"""A push producer that wraps a pull producer.
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"""
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def __init__(
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self, reactor: IReactorTime, producer: IPullProducer, consumer: IConsumer
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):
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self._clock = Clock(reactor)
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self._producer = producer
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self._consumer = consumer
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# While running we use a looping call with a zero delay to call
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# resumeProducing on given producer.
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self._looping_call = None # type: Optional[LoopingCall]
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# We start writing next reactor tick.
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self._start_loop()
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def _start_loop(self):
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"""Start the looping call to
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"""
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if not self._looping_call:
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# Start a looping call which runs every tick.
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self._looping_call = self._clock.looping_call(self._run_once, 0)
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def stop(self):
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"""Stops calling resumeProducing.
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"""
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if self._looping_call:
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self._looping_call.stop()
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self._looping_call = None
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def pauseProducing(self):
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"""Implements IPushProducer
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"""
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self.stop()
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def resumeProducing(self):
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"""Implements IPushProducer
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"""
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self._start_loop()
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def stopProducing(self):
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"""Implements IPushProducer
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"""
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self.stop()
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self._producer.stopProducing()
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def _run_once(self):
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"""Calls resumeProducing on producer once.
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"""
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try:
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self._producer.resumeProducing()
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except Exception:
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logger.exception("Failed to call resumeProducing")
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try:
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self._consumer.unregisterProducer()
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except Exception:
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pass
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self.stopProducing()
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