239 lines
8.7 KiB
Python
239 lines
8.7 KiB
Python
# Copyright 2021 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
from twisted.internet import defer
|
|
|
|
from synapse.logging.context import make_deferred_yieldable
|
|
from synapse.util.batching_queue import (
|
|
BatchingQueue,
|
|
number_in_flight,
|
|
number_of_keys,
|
|
number_queued,
|
|
)
|
|
|
|
from tests.server import get_clock
|
|
from tests.unittest import TestCase
|
|
|
|
|
|
class BatchingQueueTestCase(TestCase):
|
|
def setUp(self):
|
|
self.clock, hs_clock = get_clock()
|
|
|
|
# We ensure that we remove any existing metrics for "test_queue".
|
|
try:
|
|
number_queued.remove("test_queue")
|
|
number_of_keys.remove("test_queue")
|
|
number_in_flight.remove("test_queue")
|
|
except KeyError:
|
|
pass
|
|
|
|
self._pending_calls = []
|
|
self.queue = BatchingQueue("test_queue", hs_clock, self._process_queue)
|
|
|
|
async def _process_queue(self, values):
|
|
d = defer.Deferred()
|
|
self._pending_calls.append((values, d))
|
|
return await make_deferred_yieldable(d)
|
|
|
|
def _get_sample_with_name(self, metric, name) -> int:
|
|
"""For a prometheus metric get the value of the sample that has a
|
|
matching "name" label.
|
|
"""
|
|
for sample in metric.collect()[0].samples:
|
|
if sample.labels.get("name") == name:
|
|
return sample.value
|
|
|
|
self.fail("Found no matching sample")
|
|
|
|
def _assert_metrics(self, queued, keys, in_flight):
|
|
"""Assert that the metrics are correct"""
|
|
|
|
sample = self._get_sample_with_name(number_queued, self.queue._name)
|
|
self.assertEqual(
|
|
sample,
|
|
queued,
|
|
"number_queued",
|
|
)
|
|
|
|
sample = self._get_sample_with_name(number_of_keys, self.queue._name)
|
|
self.assertEqual(sample, keys, "number_of_keys")
|
|
|
|
sample = self._get_sample_with_name(number_in_flight, self.queue._name)
|
|
self.assertEqual(
|
|
sample,
|
|
in_flight,
|
|
"number_in_flight",
|
|
)
|
|
|
|
def test_simple(self):
|
|
"""Tests the basic case of calling `add_to_queue` once and having
|
|
`_process_queue` return.
|
|
"""
|
|
|
|
self.assertFalse(self._pending_calls)
|
|
|
|
queue_d = defer.ensureDeferred(self.queue.add_to_queue("foo"))
|
|
|
|
self._assert_metrics(queued=1, keys=1, in_flight=1)
|
|
|
|
# The queue should wait a reactor tick before calling the processing
|
|
# function.
|
|
self.assertFalse(self._pending_calls)
|
|
self.assertFalse(queue_d.called)
|
|
|
|
# We should see a call to `_process_queue` after a reactor tick.
|
|
self.clock.pump([0])
|
|
|
|
self.assertEqual(len(self._pending_calls), 1)
|
|
self.assertEqual(self._pending_calls[0][0], ["foo"])
|
|
self.assertFalse(queue_d.called)
|
|
self._assert_metrics(queued=0, keys=0, in_flight=1)
|
|
|
|
# Return value of the `_process_queue` should be propagated back.
|
|
self._pending_calls.pop()[1].callback("bar")
|
|
|
|
self.assertEqual(self.successResultOf(queue_d), "bar")
|
|
|
|
self._assert_metrics(queued=0, keys=0, in_flight=0)
|
|
|
|
def test_batching(self):
|
|
"""Test that multiple calls at the same time get batched up into one
|
|
call to `_process_queue`.
|
|
"""
|
|
|
|
self.assertFalse(self._pending_calls)
|
|
|
|
queue_d1 = defer.ensureDeferred(self.queue.add_to_queue("foo1"))
|
|
queue_d2 = defer.ensureDeferred(self.queue.add_to_queue("foo2"))
|
|
|
|
self._assert_metrics(queued=2, keys=1, in_flight=2)
|
|
|
|
self.clock.pump([0])
|
|
|
|
# We should see only *one* call to `_process_queue`
|
|
self.assertEqual(len(self._pending_calls), 1)
|
|
self.assertEqual(self._pending_calls[0][0], ["foo1", "foo2"])
|
|
self.assertFalse(queue_d1.called)
|
|
self.assertFalse(queue_d2.called)
|
|
self._assert_metrics(queued=0, keys=0, in_flight=2)
|
|
|
|
# Return value of the `_process_queue` should be propagated back to both.
|
|
self._pending_calls.pop()[1].callback("bar")
|
|
|
|
self.assertEqual(self.successResultOf(queue_d1), "bar")
|
|
self.assertEqual(self.successResultOf(queue_d2), "bar")
|
|
self._assert_metrics(queued=0, keys=0, in_flight=0)
|
|
|
|
def test_queuing(self):
|
|
"""Test that we queue up requests while a `_process_queue` is being
|
|
called.
|
|
"""
|
|
|
|
self.assertFalse(self._pending_calls)
|
|
|
|
queue_d1 = defer.ensureDeferred(self.queue.add_to_queue("foo1"))
|
|
self.clock.pump([0])
|
|
|
|
self.assertEqual(len(self._pending_calls), 1)
|
|
|
|
# We queue up work after the process function has been called, testing
|
|
# that they get correctly queued up.
|
|
queue_d2 = defer.ensureDeferred(self.queue.add_to_queue("foo2"))
|
|
queue_d3 = defer.ensureDeferred(self.queue.add_to_queue("foo3"))
|
|
|
|
# We should see only *one* call to `_process_queue`
|
|
self.assertEqual(len(self._pending_calls), 1)
|
|
self.assertEqual(self._pending_calls[0][0], ["foo1"])
|
|
self.assertFalse(queue_d1.called)
|
|
self.assertFalse(queue_d2.called)
|
|
self.assertFalse(queue_d3.called)
|
|
self._assert_metrics(queued=2, keys=1, in_flight=3)
|
|
|
|
# Return value of the `_process_queue` should be propagated back to the
|
|
# first.
|
|
self._pending_calls.pop()[1].callback("bar1")
|
|
|
|
self.assertEqual(self.successResultOf(queue_d1), "bar1")
|
|
self.assertFalse(queue_d2.called)
|
|
self.assertFalse(queue_d3.called)
|
|
self._assert_metrics(queued=2, keys=1, in_flight=2)
|
|
|
|
# We should now see a second call to `_process_queue`
|
|
self.clock.pump([0])
|
|
self.assertEqual(len(self._pending_calls), 1)
|
|
self.assertEqual(self._pending_calls[0][0], ["foo2", "foo3"])
|
|
self.assertFalse(queue_d2.called)
|
|
self.assertFalse(queue_d3.called)
|
|
self._assert_metrics(queued=0, keys=0, in_flight=2)
|
|
|
|
# Return value of the `_process_queue` should be propagated back to the
|
|
# second.
|
|
self._pending_calls.pop()[1].callback("bar2")
|
|
|
|
self.assertEqual(self.successResultOf(queue_d2), "bar2")
|
|
self.assertEqual(self.successResultOf(queue_d3), "bar2")
|
|
self._assert_metrics(queued=0, keys=0, in_flight=0)
|
|
|
|
def test_different_keys(self):
|
|
"""Test that calls to different keys get processed in parallel."""
|
|
|
|
self.assertFalse(self._pending_calls)
|
|
|
|
queue_d1 = defer.ensureDeferred(self.queue.add_to_queue("foo1", key=1))
|
|
self.clock.pump([0])
|
|
queue_d2 = defer.ensureDeferred(self.queue.add_to_queue("foo2", key=2))
|
|
self.clock.pump([0])
|
|
|
|
# We queue up another item with key=2 to check that we will keep taking
|
|
# things off the queue.
|
|
queue_d3 = defer.ensureDeferred(self.queue.add_to_queue("foo3", key=2))
|
|
|
|
# We should see two calls to `_process_queue`
|
|
self.assertEqual(len(self._pending_calls), 2)
|
|
self.assertEqual(self._pending_calls[0][0], ["foo1"])
|
|
self.assertEqual(self._pending_calls[1][0], ["foo2"])
|
|
self.assertFalse(queue_d1.called)
|
|
self.assertFalse(queue_d2.called)
|
|
self.assertFalse(queue_d3.called)
|
|
self._assert_metrics(queued=1, keys=1, in_flight=3)
|
|
|
|
# Return value of the `_process_queue` should be propagated back to the
|
|
# first.
|
|
self._pending_calls.pop(0)[1].callback("bar1")
|
|
|
|
self.assertEqual(self.successResultOf(queue_d1), "bar1")
|
|
self.assertFalse(queue_d2.called)
|
|
self.assertFalse(queue_d3.called)
|
|
self._assert_metrics(queued=1, keys=1, in_flight=2)
|
|
|
|
# Return value of the `_process_queue` should be propagated back to the
|
|
# second.
|
|
self._pending_calls.pop()[1].callback("bar2")
|
|
|
|
self.assertEqual(self.successResultOf(queue_d2), "bar2")
|
|
self.assertFalse(queue_d3.called)
|
|
|
|
# We should now see a call `_pending_calls` for `foo3`
|
|
self.clock.pump([0])
|
|
self.assertEqual(len(self._pending_calls), 1)
|
|
self.assertEqual(self._pending_calls[0][0], ["foo3"])
|
|
self.assertFalse(queue_d3.called)
|
|
self._assert_metrics(queued=0, keys=0, in_flight=1)
|
|
|
|
# Return value of the `_process_queue` should be propagated back to the
|
|
# third deferred.
|
|
self._pending_calls.pop()[1].callback("bar4")
|
|
|
|
self.assertEqual(self.successResultOf(queue_d3), "bar4")
|
|
self._assert_metrics(queued=0, keys=0, in_flight=0)
|