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https://mau.dev/maunium/synapse.git
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1531b214fc
The idea here is that if an instance persists an event via the replication HTTP API it can return before we receive that event over replication, which can lead to races where code assumes that persisting an event immediately updates various caches (e.g. current state of the room). Most of Synapse doesn't hit such races, so we don't do the waiting automagically, instead we do so where necessary to avoid unnecessary delays. We may decide to change our minds here if it turns out there are a lot of subtle races going on. People probably want to look at this commit by commit.
80 lines
3.1 KiB
Python
80 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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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 synapse.metrics import REGISTRY, generate_latest
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from synapse.types import Requester, UserID
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from tests.unittest import HomeserverTestCase
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class ExtremStatisticsTestCase(HomeserverTestCase):
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def test_exposed_to_prometheus(self):
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"""
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Forward extremity counts are exposed via Prometheus.
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"""
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room_creator = self.hs.get_room_creation_handler()
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user = UserID("alice", "test")
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requester = Requester(user, None, False, None, None)
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# Real events, forward extremities
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events = [(3, 2), (6, 2), (4, 6)]
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for event_count, extrems in events:
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info, _ = self.get_success(room_creator.create_room(requester, {}))
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room_id = info["room_id"]
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last_event = None
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# Make a real event chain
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for i in range(event_count):
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ev = self.create_and_send_event(room_id, user, False, last_event)
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last_event = [ev]
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# Sprinkle in some extremities
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for i in range(extrems):
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ev = self.create_and_send_event(room_id, user, False, last_event)
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# Let it run for a while, then pull out the statistics from the
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# Prometheus client registry
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self.reactor.advance(60 * 60 * 1000)
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self.pump(1)
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items = set(
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filter(
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lambda x: b"synapse_forward_extremities_" in x,
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generate_latest(REGISTRY).split(b"\n"),
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)
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)
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expected = {
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b'synapse_forward_extremities_bucket{le="1.0"} 0.0',
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b'synapse_forward_extremities_bucket{le="2.0"} 2.0',
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b'synapse_forward_extremities_bucket{le="3.0"} 2.0',
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b'synapse_forward_extremities_bucket{le="5.0"} 2.0',
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b'synapse_forward_extremities_bucket{le="7.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="10.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="15.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="20.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="50.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="100.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="200.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="500.0"} 3.0',
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b'synapse_forward_extremities_bucket{le="+Inf"} 3.0',
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b"synapse_forward_extremities_count 3.0",
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b"synapse_forward_extremities_sum 10.0",
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}
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self.assertEqual(items, expected)
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