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# Copyright 2018 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.
"""Tests server and client side compression."""
import threading
import time
import unittest
import grpc
from tests.unit import test_common
from tests.unit.framework.common import test_constants
_BEAT = 0.5
_SOME_TIME = 5
_MORE_TIME = 10
class _MethodHandler(grpc.RpcMethodHandler):
request_streaming = True
response_streaming = True
request_deserializer = None
response_serializer = None
def stream_stream(self, request_iterator, servicer_context):
for request in request_iterator:
yield request * 2
_METHOD_HANDLER = _MethodHandler()
class _GenericHandler(grpc.GenericRpcHandler):
def service(self, handler_call_details):
return _METHOD_HANDLER
_GENERIC_HANDLER = _GenericHandler()
class _Pipe(object):
def __init__(self, values):
self._condition = threading.Condition()
self._values = list(values)
self._open = True
def __iter__(self):
return self
def _next(self):
with self._condition:
while not self._values and self._open:
self._condition.wait()
if self._values:
return self._values.pop(0)
else:
raise StopIteration()
def next(self):
return self._next()
def __next__(self):
return self._next()
def add(self, value):
with self._condition:
self._values.append(value)
self._condition.notify()
def close(self):
with self._condition:
self._open = False
self._condition.notify()
def __enter__(self):
return self
def __exit__(self, type, value, traceback):
self.close()
class ChannelCloseTest(unittest.TestCase):
def setUp(self):
self._server = test_common.test_server(
max_workers=test_constants.THREAD_CONCURRENCY)
self._server.add_generic_rpc_handlers((_GENERIC_HANDLER,))
self._port = self._server.add_insecure_port('[::]:0')
self._server.start()
def tearDown(self):
self._server.stop(None)
def test_close_immediately_after_call_invocation(self):
channel = grpc.insecure_channel('localhost:{}'.format(self._port))
multi_callable = channel.stream_stream('Meffod')
request_iterator = _Pipe(())
response_iterator = multi_callable(request_iterator)
channel.close()
request_iterator.close()
self.assertIs(response_iterator.code(), grpc.StatusCode.CANCELLED)
def test_close_while_call_active(self):
channel = grpc.insecure_channel('localhost:{}'.format(self._port))
multi_callable = channel.stream_stream('Meffod')
request_iterator = _Pipe((b'abc',))
response_iterator = multi_callable(request_iterator)
next(response_iterator)
channel.close()
request_iterator.close()
self.assertIs(response_iterator.code(), grpc.StatusCode.CANCELLED)
def test_context_manager_close_while_call_active(self):
with grpc.insecure_channel('localhost:{}'.format(
self._port)) as channel: # pylint: disable=bad-continuation
multi_callable = channel.stream_stream('Meffod')
request_iterator = _Pipe((b'abc',))
response_iterator = multi_callable(request_iterator)
next(response_iterator)
request_iterator.close()
self.assertIs(response_iterator.code(), grpc.StatusCode.CANCELLED)
def test_context_manager_close_while_many_calls_active(self):
with grpc.insecure_channel('localhost:{}'.format(
self._port)) as channel: # pylint: disable=bad-continuation
multi_callable = channel.stream_stream('Meffod')
request_iterators = tuple(
_Pipe((b'abc',))
for _ in range(test_constants.THREAD_CONCURRENCY))
response_iterators = []
for request_iterator in request_iterators:
response_iterator = multi_callable(request_iterator)
next(response_iterator)
response_iterators.append(response_iterator)
for request_iterator in request_iterators:
request_iterator.close()
for response_iterator in response_iterators:
self.assertIs(response_iterator.code(), grpc.StatusCode.CANCELLED)
def test_many_concurrent_closes(self):
channel = grpc.insecure_channel('localhost:{}'.format(self._port))
multi_callable = channel.stream_stream('Meffod')
request_iterator = _Pipe((b'abc',))
response_iterator = multi_callable(request_iterator)
next(response_iterator)
start = time.time()
end = start + _MORE_TIME
def sleep_some_time_then_close():
time.sleep(_SOME_TIME)
channel.close()
for _ in range(test_constants.THREAD_CONCURRENCY):
close_thread = threading.Thread(target=sleep_some_time_then_close)
close_thread.start()
while True:
request_iterator.add(b'def')
time.sleep(_BEAT)
if end < time.time():
break
request_iterator.close()
self.assertIs(response_iterator.code(), grpc.StatusCode.CANCELLED)
if __name__ == '__main__':
unittest.main(verbosity=2)
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