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Code Issues Releases Wiki Activity

Remove handling of multiple rows per ID

pull/7010/head
Erik Johnston 2020-02-28 11:45:35 +00:00
parent 59ad93d2a4
commit f70f44abc7
2 changed files with 1 additions and 79 deletions
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35
synapse/storage/data_stores/main/devices.py
View File

@ -112,23 +112,13 @@ class DeviceWorkerStore(SQLBaseStore):
if not has_changed:
return now_stream_id, []
# We retrieve n+1 devices from the list of outbound pokes where n is
# our outbound device update limit. We then check if the very last
# device has the same stream_id as the second-to-last device. If so,
# then we ignore all devices with that stream_id and only send the
# devices with a lower stream_id.
#
# If when culling the list we end up with no devices afterwards, we
# consider the device update to be too large, and simply skip the
# stream_id; the rationale being that such a large device list update
# is likely an error.
updates = yield self.db.runInteraction(
"get_device_updates_by_remote",
self._get_device_updates_by_remote_txn,
destination,
from_stream_id,
now_stream_id,
limit + 1,
limit,
)
# Return an empty list if there are no updates
@ -166,14 +156,6 @@ class DeviceWorkerStore(SQLBaseStore):
"device_id": verify_key.version,
}
# if we have exceeded the limit, we need to exclude any results with the
# same stream_id as the last row.
if len(updates) > limit:
stream_id_cutoff = updates[-1][2]
now_stream_id = stream_id_cutoff - 1
else:
stream_id_cutoff = None
# Perform the equivalent of a GROUP BY
#
# Iterate through the updates list and copy non-duplicate
@ -192,10 +174,6 @@ class DeviceWorkerStore(SQLBaseStore):
query_map = {}
cross_signing_keys_by_user = {}
for user_id, device_id, update_stream_id, update_context in updates:
if stream_id_cutoff is not None and update_stream_id >= stream_id_cutoff:
# Stop processing updates
break
if (
user_id in master_key_by_user
and device_id == master_key_by_user[user_id]["device_id"]
@ -218,17 +196,6 @@ class DeviceWorkerStore(SQLBaseStore):
if update_stream_id > previous_update_stream_id:
query_map[key] = (update_stream_id, update_context)
# If we didn't find any updates with a stream_id lower than the cutoff, it
# means that there are more than limit updates all of which have the same
# steam_id.
# That should only happen if a client is spamming the server with new
# devices, in which case E2E isn't going to work well anyway. We'll just
# skip that stream_id and return an empty list, and continue with the next
# stream_id next time.
if not query_map and not cross_signing_keys_by_user:
return stream_id_cutoff, []
results = yield self._get_device_update_edus_by_remote(
destination, from_stream_id, query_map
)

45
tests/storage/test_devices.py
View File

@ -88,51 +88,6 @@ class DeviceStoreTestCase(tests.unittest.TestCase):
# Check original device_ids are contained within these updates
self._check_devices_in_updates(device_ids, device_updates)
@defer.inlineCallbacks
def test_get_device_updates_by_remote_limited(self):
# Test breaking the update limit in 1, 101, and 1 device_id segments
# first add one device
device_ids1 = ["device_id0"]
yield self.store.add_device_change_to_streams(
"user_id", device_ids1, ["someotherhost"]
)
# then add 101
device_ids2 = ["device_id" + str(i + 1) for i in range(101)]
yield self.store.add_device_change_to_streams(
"user_id", device_ids2, ["someotherhost"]
)
# then one more
device_ids3 = ["newdevice"]
yield self.store.add_device_change_to_streams(
"user_id", device_ids3, ["someotherhost"]
)
#
# now read them back.
#
# first we should get a single update
now_stream_id, device_updates = yield self.store.get_device_updates_by_remote(
"someotherhost", -1, limit=100
)
self._check_devices_in_updates(device_ids1, device_updates)
# Then we should get an empty list back as the 101 devices broke the limit
now_stream_id, device_updates = yield self.store.get_device_updates_by_remote(
"someotherhost", now_stream_id, limit=100
)
self.assertEqual(len(device_updates), 0)
# The 101 devices should've been cleared, so we should now just get one device
# update
now_stream_id, device_updates = yield self.store.get_device_updates_by_remote(
"someotherhost", now_stream_id, limit=100
)
self._check_devices_in_updates(device_ids3, device_updates)
def _check_devices_in_updates(self, expected_device_ids, device_updates):
"""Check that an specific device ids exist in a list of device update EDUs"""
self.assertEqual(len(device_updates), len(expected_device_ids))