473 lines
17 KiB
Python
473 lines
17 KiB
Python
from typing import List, Tuple
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from mock import Mock
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from synapse.api.constants import EventTypes
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from synapse.events import EventBase
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from synapse.federation.sender import PerDestinationQueue, TransactionManager
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from synapse.federation.units import Edu
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from synapse.rest import admin
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from synapse.rest.client.v1 import login, room
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from synapse.util.retryutils import NotRetryingDestination
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from tests.test_utils import event_injection, make_awaitable
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from tests.unittest import FederatingHomeserverTestCase, override_config
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class FederationCatchUpTestCases(FederatingHomeserverTestCase):
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servlets = [
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admin.register_servlets,
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room.register_servlets,
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login.register_servlets,
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]
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def make_homeserver(self, reactor, clock):
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return self.setup_test_homeserver(
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federation_transport_client=Mock(spec=["send_transaction"]),
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)
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def prepare(self, reactor, clock, hs):
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# stub out get_current_hosts_in_room
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state_handler = hs.get_state_handler()
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# This mock is crucial for destination_rooms to be populated.
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state_handler.get_current_hosts_in_room = Mock(
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return_value=make_awaitable(["test", "host2"])
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)
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# whenever send_transaction is called, record the pdu data
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self.pdus = []
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self.failed_pdus = []
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self.is_online = True
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self.hs.get_federation_transport_client().send_transaction.side_effect = (
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self.record_transaction
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)
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async def record_transaction(self, txn, json_cb):
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if self.is_online:
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data = json_cb()
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self.pdus.extend(data["pdus"])
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return {}
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else:
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data = json_cb()
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self.failed_pdus.extend(data["pdus"])
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raise NotRetryingDestination(0, 24 * 60 * 60 * 1000, txn.destination)
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def get_destination_room(self, room: str, destination: str = "host2") -> dict:
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"""
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Gets the destination_rooms entry for a (destination, room_id) pair.
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Args:
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room: room ID
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destination: what destination, default is "host2"
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Returns:
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Dictionary of { event_id: str, stream_ordering: int }
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"""
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event_id, stream_ordering = self.get_success(
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self.hs.get_datastore().db_pool.execute(
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"test:get_destination_rooms",
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None,
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"""
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SELECT event_id, stream_ordering
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FROM destination_rooms dr
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JOIN events USING (stream_ordering)
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WHERE dr.destination = ? AND dr.room_id = ?
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""",
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destination,
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room,
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)
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)[0]
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return {"event_id": event_id, "stream_ordering": stream_ordering}
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@override_config({"send_federation": True})
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def test_catch_up_destination_rooms_tracking(self):
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"""
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Tests that we populate the `destination_rooms` table as needed.
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"""
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self.register_user("u1", "you the one")
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u1_token = self.login("u1", "you the one")
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room = self.helper.create_room_as("u1", tok=u1_token)
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self.get_success(
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event_injection.inject_member_event(self.hs, room, "@user:host2", "join")
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)
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event_id_1 = self.helper.send(room, "wombats!", tok=u1_token)["event_id"]
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row_1 = self.get_destination_room(room)
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event_id_2 = self.helper.send(room, "rabbits!", tok=u1_token)["event_id"]
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row_2 = self.get_destination_room(room)
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# check: events correctly registered in order
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self.assertEqual(row_1["event_id"], event_id_1)
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self.assertEqual(row_2["event_id"], event_id_2)
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self.assertEqual(row_1["stream_ordering"], row_2["stream_ordering"] - 1)
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@override_config({"send_federation": True})
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def test_catch_up_last_successful_stream_ordering_tracking(self):
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"""
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Tests that we populate the `destination_rooms` table as needed.
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"""
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self.register_user("u1", "you the one")
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u1_token = self.login("u1", "you the one")
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room = self.helper.create_room_as("u1", tok=u1_token)
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# take the remote offline
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self.is_online = False
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self.get_success(
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event_injection.inject_member_event(self.hs, room, "@user:host2", "join")
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)
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self.helper.send(room, "wombats!", tok=u1_token)
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self.pump()
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lsso_1 = self.get_success(
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self.hs.get_datastore().get_destination_last_successful_stream_ordering(
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"host2"
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)
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)
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self.assertIsNone(
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lsso_1,
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"There should be no last successful stream ordering for an always-offline destination",
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)
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# bring the remote online
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self.is_online = True
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event_id_2 = self.helper.send(room, "rabbits!", tok=u1_token)["event_id"]
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lsso_2 = self.get_success(
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self.hs.get_datastore().get_destination_last_successful_stream_ordering(
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"host2"
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)
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)
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row_2 = self.get_destination_room(room)
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self.assertEqual(
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self.pdus[0]["content"]["body"],
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"rabbits!",
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"Test fault: didn't receive the right PDU",
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)
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self.assertEqual(
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row_2["event_id"],
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event_id_2,
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"Test fault: destination_rooms not updated correctly",
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)
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self.assertEqual(
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lsso_2,
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row_2["stream_ordering"],
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"Send succeeded but not marked as last_successful_stream_ordering",
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)
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@override_config({"send_federation": True}) # critical to federate
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def test_catch_up_from_blank_state(self):
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"""
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Runs an overall test of federation catch-up from scratch.
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Further tests will focus on more narrow aspects and edge-cases, but I
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hope to provide an overall view with this test.
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"""
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# bring the other server online
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self.is_online = True
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# let's make some events for the other server to receive
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self.register_user("u1", "you the one")
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u1_token = self.login("u1", "you the one")
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room_1 = self.helper.create_room_as("u1", tok=u1_token)
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room_2 = self.helper.create_room_as("u1", tok=u1_token)
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# also critical to federate
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self.get_success(
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event_injection.inject_member_event(self.hs, room_1, "@user:host2", "join")
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)
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self.get_success(
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event_injection.inject_member_event(self.hs, room_2, "@user:host2", "join")
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)
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self.helper.send_state(
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room_1, event_type="m.room.topic", body={"topic": "wombat"}, tok=u1_token
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)
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# check: PDU received for topic event
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self.assertEqual(len(self.pdus), 1)
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self.assertEqual(self.pdus[0]["type"], "m.room.topic")
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# take the remote offline
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self.is_online = False
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# send another event
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self.helper.send(room_1, "hi user!", tok=u1_token)
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# check: things didn't go well since the remote is down
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self.assertEqual(len(self.failed_pdus), 1)
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self.assertEqual(self.failed_pdus[0]["content"]["body"], "hi user!")
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# let's delete the federation transmission queue
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# (this pretends we are starting up fresh.)
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self.assertFalse(
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self.hs.get_federation_sender()
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._per_destination_queues["host2"]
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.transmission_loop_running
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)
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del self.hs.get_federation_sender()._per_destination_queues["host2"]
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# let's also clear any backoffs
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self.get_success(
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self.hs.get_datastore().set_destination_retry_timings("host2", None, 0, 0)
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)
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# bring the remote online and clear the received pdu list
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self.is_online = True
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self.pdus = []
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# now we need to initiate a federation transaction somehow…
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# to do that, let's send another event (because it's simple to do)
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# (do it to another room otherwise the catch-up logic decides it doesn't
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# need to catch up room_1 — something I overlooked when first writing
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# this test)
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self.helper.send(room_2, "wombats!", tok=u1_token)
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# we should now have received both PDUs
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self.assertEqual(len(self.pdus), 2)
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self.assertEqual(self.pdus[0]["content"]["body"], "hi user!")
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self.assertEqual(self.pdus[1]["content"]["body"], "wombats!")
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def make_fake_destination_queue(
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self, destination: str = "host2"
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) -> Tuple[PerDestinationQueue, List[EventBase]]:
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"""
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Makes a fake per-destination queue.
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"""
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transaction_manager = TransactionManager(self.hs)
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per_dest_queue = PerDestinationQueue(self.hs, transaction_manager, destination)
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results_list = []
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async def fake_send(
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destination_tm: str,
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pending_pdus: List[EventBase],
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_pending_edus: List[Edu],
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) -> bool:
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assert destination == destination_tm
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results_list.extend(pending_pdus)
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return True # success!
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transaction_manager.send_new_transaction = fake_send
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return per_dest_queue, results_list
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@override_config({"send_federation": True})
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def test_catch_up_loop(self):
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"""
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Tests the behaviour of _catch_up_transmission_loop.
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"""
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# ARRANGE:
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# - a local user (u1)
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# - 3 rooms which u1 is joined to (and remote user @user:host2 is
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# joined to)
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# - some events (1 to 5) in those rooms
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# we have 'already sent' events 1 and 2 to host2
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per_dest_queue, sent_pdus = self.make_fake_destination_queue()
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self.register_user("u1", "you the one")
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u1_token = self.login("u1", "you the one")
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room_1 = self.helper.create_room_as("u1", tok=u1_token)
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room_2 = self.helper.create_room_as("u1", tok=u1_token)
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room_3 = self.helper.create_room_as("u1", tok=u1_token)
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self.get_success(
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event_injection.inject_member_event(self.hs, room_1, "@user:host2", "join")
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)
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self.get_success(
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event_injection.inject_member_event(self.hs, room_2, "@user:host2", "join")
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)
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self.get_success(
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event_injection.inject_member_event(self.hs, room_3, "@user:host2", "join")
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)
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# create some events
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self.helper.send(room_1, "you hear me!!", tok=u1_token)
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event_id_2 = self.helper.send(room_2, "wombats!", tok=u1_token)["event_id"]
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self.helper.send(room_3, "Matrix!", tok=u1_token)
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event_id_4 = self.helper.send(room_2, "rabbits!", tok=u1_token)["event_id"]
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event_id_5 = self.helper.send(room_3, "Synapse!", tok=u1_token)["event_id"]
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# destination_rooms should already be populated, but let us pretend that we already
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# sent (successfully) up to and including event id 2
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event_2 = self.get_success(self.hs.get_datastore().get_event(event_id_2))
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# also fetch event 5 so we know its last_successful_stream_ordering later
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event_5 = self.get_success(self.hs.get_datastore().get_event(event_id_5))
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self.get_success(
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self.hs.get_datastore().set_destination_last_successful_stream_ordering(
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"host2", event_2.internal_metadata.stream_ordering
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)
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)
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# ACT
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self.get_success(per_dest_queue._catch_up_transmission_loop())
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# ASSERT, noticing in particular:
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# - event 3 not sent out, because event 5 replaces it
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# - order is least recent first, so event 5 comes after event 4
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# - catch-up is completed
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self.assertEqual(len(sent_pdus), 2)
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self.assertEqual(sent_pdus[0].event_id, event_id_4)
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self.assertEqual(sent_pdus[1].event_id, event_id_5)
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self.assertFalse(per_dest_queue._catching_up)
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self.assertEqual(
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per_dest_queue._last_successful_stream_ordering,
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event_5.internal_metadata.stream_ordering,
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)
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@override_config({"send_federation": True})
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def test_catch_up_on_synapse_startup(self):
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"""
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Tests the behaviour of get_catch_up_outstanding_destinations and
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_wake_destinations_needing_catchup.
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"""
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# list of sorted server names (note that there are more servers than the batch
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# size used in get_catch_up_outstanding_destinations).
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server_names = ["server%02d" % number for number in range(42)] + ["zzzerver"]
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# ARRANGE:
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# - a local user (u1)
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# - a room which u1 is joined to (and remote users @user:serverXX are
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# joined to)
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# mark the remotes as online
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self.is_online = True
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self.register_user("u1", "you the one")
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u1_token = self.login("u1", "you the one")
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room_id = self.helper.create_room_as("u1", tok=u1_token)
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for server_name in server_names:
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self.get_success(
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event_injection.inject_member_event(
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self.hs, room_id, "@user:%s" % server_name, "join"
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)
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)
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# create an event
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self.helper.send(room_id, "deary me!", tok=u1_token)
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# ASSERT:
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# - All servers are up to date so none should have outstanding catch-up
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outstanding_when_successful = self.get_success(
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self.hs.get_datastore().get_catch_up_outstanding_destinations(None)
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)
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self.assertEqual(outstanding_when_successful, [])
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# ACT:
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# - Make the remote servers unreachable
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self.is_online = False
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# - Mark zzzerver as being backed-off from
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now = self.clock.time_msec()
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self.get_success(
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self.hs.get_datastore().set_destination_retry_timings(
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"zzzerver", now, now, 24 * 60 * 60 * 1000 # retry in 1 day
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)
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)
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# - Send an event
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self.helper.send(room_id, "can anyone hear me?", tok=u1_token)
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# ASSERT (get_catch_up_outstanding_destinations):
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# - all remotes are outstanding
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# - they are returned in batches of 25, in order
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outstanding_1 = self.get_success(
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self.hs.get_datastore().get_catch_up_outstanding_destinations(None)
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)
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self.assertEqual(len(outstanding_1), 25)
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self.assertEqual(outstanding_1, server_names[0:25])
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outstanding_2 = self.get_success(
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self.hs.get_datastore().get_catch_up_outstanding_destinations(
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outstanding_1[-1]
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)
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)
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self.assertNotIn("zzzerver", outstanding_2)
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self.assertEqual(len(outstanding_2), 17)
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self.assertEqual(outstanding_2, server_names[25:-1])
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# ACT: call _wake_destinations_needing_catchup
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# patch wake_destination to just count the destinations instead
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woken = []
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def wake_destination_track(destination):
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woken.append(destination)
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self.hs.get_federation_sender().wake_destination = wake_destination_track
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# cancel the pre-existing timer for _wake_destinations_needing_catchup
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# this is because we are calling it manually rather than waiting for it
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# to be called automatically
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self.hs.get_federation_sender()._catchup_after_startup_timer.cancel()
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self.get_success(
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self.hs.get_federation_sender()._wake_destinations_needing_catchup(), by=5.0
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)
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# ASSERT (_wake_destinations_needing_catchup):
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# - all remotes are woken up, save for zzzerver
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self.assertNotIn("zzzerver", woken)
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# - all destinations are woken exactly once; they appear once in woken.
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self.assertCountEqual(woken, server_names[:-1])
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@override_config({"send_federation": True})
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def test_not_latest_event(self):
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"""Test that we send the latest event in the room even if its not ours."""
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per_dest_queue, sent_pdus = self.make_fake_destination_queue()
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# Make a room with a local user, and two servers. One will go offline
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# and one will send some events.
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self.register_user("u1", "you the one")
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u1_token = self.login("u1", "you the one")
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room_1 = self.helper.create_room_as("u1", tok=u1_token)
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self.get_success(
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event_injection.inject_member_event(self.hs, room_1, "@user:host2", "join")
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)
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event_1 = self.get_success(
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event_injection.inject_member_event(self.hs, room_1, "@user:host3", "join")
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)
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# First we send something from the local server, so that we notice the
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# remote is down and go into catchup mode.
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self.helper.send(room_1, "you hear me!!", tok=u1_token)
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# Now simulate us receiving an event from the still online remote.
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event_2 = self.get_success(
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event_injection.inject_event(
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self.hs,
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type=EventTypes.Message,
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sender="@user:host3",
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room_id=room_1,
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content={"msgtype": "m.text", "body": "Hello"},
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)
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)
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self.get_success(
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self.hs.get_datastore().set_destination_last_successful_stream_ordering(
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"host2", event_1.internal_metadata.stream_ordering
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)
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)
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self.get_success(per_dest_queue._catch_up_transmission_loop())
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# We expect only the last message from the remote, event_2, to have been
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# sent, rather than the last *local* event that was sent.
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self.assertEqual(len(sent_pdus), 1)
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self.assertEqual(sent_pdus[0].event_id, event_2.event_id)
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self.assertFalse(per_dest_queue._catching_up)
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