| # 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 |
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| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| import time |
| import threading |
| import unittest |
| |
| from grpc._cython import cygrpc |
| |
| # TODO(nathaniel): This should be at least one hundred. Why not one thousand? |
| _PARALLELISM = 4 |
| |
| |
| def _channel_and_completion_queue(): |
| channel = cygrpc.Channel('localhost:54321', cygrpc.ChannelArgs(())) |
| completion_queue = cygrpc.CompletionQueue() |
| return channel, completion_queue |
| |
| |
| def _connectivity_loop(channel, completion_queue): |
| for _ in range(100): |
| connectivity = channel.check_connectivity_state(True) |
| channel.watch_connectivity_state( |
| connectivity, cygrpc.Timespec(time.time() + 0.2), completion_queue, |
| None) |
| completion_queue.poll(deadline=cygrpc.Timespec(float('+inf'))) |
| |
| |
| def _create_loop_destroy(): |
| channel, completion_queue = _channel_and_completion_queue() |
| _connectivity_loop(channel, completion_queue) |
| completion_queue.shutdown() |
| |
| |
| def _in_parallel(behavior, arguments): |
| threads = tuple( |
| threading.Thread(target=behavior, args=arguments) |
| for _ in range(_PARALLELISM)) |
| for thread in threads: |
| thread.start() |
| for thread in threads: |
| thread.join() |
| |
| |
| class ChannelTest(unittest.TestCase): |
| |
| def test_single_channel_lonely_connectivity(self): |
| channel, completion_queue = _channel_and_completion_queue() |
| _in_parallel(_connectivity_loop, (channel, completion_queue,)) |
| completion_queue.shutdown() |
| |
| def test_multiple_channels_lonely_connectivity(self): |
| _in_parallel(_create_loop_destroy, ()) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(verbosity=2) |