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Refactor MSC3030 /timestamp_to_event to move away from our snowflake pull from destination pattern (#14096)

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1. `federation_client.timestamp_to_event(...)` now handles all `destination` looping and uses our generic `_try_destination_list(...)` helper.
 2. Consistently handling `NotRetryingDestination` and `FederationDeniedError` across `get_pdu` , backfill, and the generic `_try_destination_list` which is used for many places we use this pattern.
 3. `get_pdu(...)` now returns `PulledPduInfo` so we know which `destination` we ended up pulling the PDU from
This commit is contained in:
Eric Eastwood 2022-10-26 16:10:55 -05:00 • committed by GitHub
parent 0d59ae706a
commit 40fa8294e3
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7 changed files with 192 additions and 127 deletions
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12
tests/federation/test_federation_client.py
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@ -142,14 +142,14 @@ class FederationClientTest(FederatingHomeserverTestCase):
def test_get_pdu_returns_nothing_when_event_does_not_exist(self):
"""No event should be returned when the event does not exist"""
remote_pdu = self.get_success(
pulled_pdu_info = self.get_success(
self.hs.get_federation_client().get_pdu(
["yet.another.server"],
"event_should_not_exist",
RoomVersions.V9,
)
)
self.assertEqual(remote_pdu, None)
self.assertEqual(pulled_pdu_info, None)
def test_get_pdu(self):
"""Test to make sure an event is returned by `get_pdu()`"""
@ -169,13 +169,15 @@ class FederationClientTest(FederatingHomeserverTestCase):
remote_pdu.internal_metadata.outlier = True
# Get the event again. This time it should read it from cache.
remote_pdu2 = self.get_success(
pulled_pdu_info2 = self.get_success(
self.hs.get_federation_client().get_pdu(
["yet.another.server"],
remote_pdu.event_id,
RoomVersions.V9,
)
)
self.assertIsNotNone(pulled_pdu_info2)
remote_pdu2 = pulled_pdu_info2.pdu
# Sanity check that we are working against the same event
self.assertEqual(remote_pdu.event_id, remote_pdu2.event_id)
@ -215,13 +217,15 @@ class FederationClientTest(FederatingHomeserverTestCase):
)
)
remote_pdu = self.get_success(
pulled_pdu_info = self.get_success(
self.hs.get_federation_client().get_pdu(
["yet.another.server"],
"event_id",
RoomVersions.V9,
)
)
self.assertIsNotNone(pulled_pdu_info)
remote_pdu = pulled_pdu_info.pdu
# check the right call got made to the agent
self._mock_agent.request.assert_called_once_with(