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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.
import time
import threading
import unittest
from grpc._cython import cygrpc
from tests.unit.framework.common import test_constants
def _channel_and_completion_queue():
channel = cygrpc.Channel(b'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(test_constants.THREAD_CONCURRENCY))
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)
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