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# Copyright 2016 gRPC authors.
#
# 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.
"""Thread that sends random weighted requests on a TestService stub."""
import random
import threading
import time
import traceback
def _weighted_test_case_generator(weighted_cases):
weight_sum = sum(weighted_cases.itervalues())
while True:
val = random.uniform(0, weight_sum)
partial_sum = 0
for case in weighted_cases:
partial_sum += weighted_cases[case]
if val <= partial_sum:
yield case
break
class TestRunner(threading.Thread):
def __init__(self, stub, test_cases, hist, exception_queue, stop_event):
super(TestRunner, self).__init__()
self._exception_queue = exception_queue
self._stop_event = stop_event
self._stub = stub
self._test_cases = _weighted_test_case_generator(test_cases)
self._histogram = hist
def run(self):
while not self._stop_event.is_set():
try:
test_case = next(self._test_cases)
start_time = time.time()
test_case.test_interoperability(self._stub, None)
end_time = time.time()
self._histogram.add((end_time - start_time) * 1e9)
except Exception as e: # pylint: disable=broad-except
traceback.print_exc()
self._exception_queue.put(
Exception("An exception occurred during test {}"
.format(test_case), e))
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