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-rw-r--r--src/python/grpcio/tests/stress/test_runner.py73
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diff --git a/src/python/grpcio/tests/stress/test_runner.py b/src/python/grpcio/tests/stress/test_runner.py
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+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""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:
+ traceback.print_exc()
+ self._exception_queue.put(
+ Exception("An exception occured during test {}"
+ .format(test_case), e))