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# -*- coding: utf-8 -*-
# Copyright 2019 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 synapse.util.retryutils import (
MIN_RETRY_INTERVAL,
RETRY_MULTIPLIER,
NotRetryingDestination,
get_retry_limiter,
)
from tests.unittest import HomeserverTestCase
class RetryLimiterTestCase(HomeserverTestCase):
def test_new_destination(self):
"""A happy-path case with a new destination and a successful operation"""
store = self.hs.get_datastore()
d = get_retry_limiter("test_dest", self.clock, store)
self.pump()
limiter = self.successResultOf(d)
# advance the clock a bit before making the request
self.pump(1)
with limiter:
pass
d = store.get_destination_retry_timings("test_dest")
self.pump()
new_timings = self.successResultOf(d)
self.assertIsNone(new_timings)
def test_limiter(self):
"""General test case which walks through the process of a failing request"""
store = self.hs.get_datastore()
d = get_retry_limiter("test_dest", self.clock, store)
self.pump()
limiter = self.successResultOf(d)
self.pump(1)
try:
with limiter:
self.pump(1)
failure_ts = self.clock.time_msec()
raise AssertionError("argh")
except AssertionError:
pass
# wait for the update to land
self.pump()
d = store.get_destination_retry_timings("test_dest")
self.pump()
new_timings = self.successResultOf(d)
self.assertEqual(new_timings["failure_ts"], failure_ts)
self.assertEqual(new_timings["retry_last_ts"], failure_ts)
self.assertEqual(new_timings["retry_interval"], MIN_RETRY_INTERVAL)
# now if we try again we should get a failure
d = get_retry_limiter("test_dest", self.clock, store)
self.pump()
self.failureResultOf(d, NotRetryingDestination)
#
# advance the clock and try again
#
self.pump(MIN_RETRY_INTERVAL)
d = get_retry_limiter("test_dest", self.clock, store)
self.pump()
limiter = self.successResultOf(d)
self.pump(1)
try:
with limiter:
self.pump(1)
retry_ts = self.clock.time_msec()
raise AssertionError("argh")
except AssertionError:
pass
# wait for the update to land
self.pump()
d = store.get_destination_retry_timings("test_dest")
self.pump()
new_timings = self.successResultOf(d)
self.assertEqual(new_timings["failure_ts"], failure_ts)
self.assertEqual(new_timings["retry_last_ts"], retry_ts)
self.assertGreaterEqual(
new_timings["retry_interval"], MIN_RETRY_INTERVAL * RETRY_MULTIPLIER * 0.5
)
self.assertLessEqual(
new_timings["retry_interval"], MIN_RETRY_INTERVAL * RETRY_MULTIPLIER * 2.0
)
#
# one more go, with success
#
self.pump(MIN_RETRY_INTERVAL * RETRY_MULTIPLIER * 2.0)
d = get_retry_limiter("test_dest", self.clock, store)
self.pump()
limiter = self.successResultOf(d)
self.pump(1)
with limiter:
self.pump(1)
# wait for the update to land
self.pump()
d = store.get_destination_retry_timings("test_dest")
self.pump()
new_timings = self.successResultOf(d)
self.assertIsNone(new_timings)
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