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# Copyright 2017 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 responding with RESOURCE_EXHAUSTED."""
import threading
import unittest
import grpc
from grpc import _channel
from grpc.framework.foundation import logging_pool
from tests.unit import test_common
from tests.unit.framework.common import test_constants
_REQUEST = b'\x00\x00\x00'
_RESPONSE = b'\x00\x00\x00'
_UNARY_UNARY = '/test/UnaryUnary'
_UNARY_STREAM = '/test/UnaryStream'
_STREAM_UNARY = '/test/StreamUnary'
_STREAM_STREAM = '/test/StreamStream'
class _TestTrigger(object):
def __init__(self, total_call_count):
self._total_call_count = total_call_count
self._pending_calls = 0
self._triggered = False
self._finish_condition = threading.Condition()
self._start_condition = threading.Condition()
# Wait for all calls be be blocked in their handler
def await_calls(self):
with self._start_condition:
while self._pending_calls < self._total_call_count:
self._start_condition.wait()
# Block in a response handler and wait for a trigger
def await_trigger(self):
with self._start_condition:
self._pending_calls += 1
self._start_condition.notify()
with self._finish_condition:
if not self._triggered:
self._finish_condition.wait()
# Finish all response handlers
def trigger(self):
with self._finish_condition:
self._triggered = True
self._finish_condition.notify_all()
def handle_unary_unary(trigger, request, servicer_context):
trigger.await_trigger()
return _RESPONSE
def handle_unary_stream(trigger, request, servicer_context):
trigger.await_trigger()
for _ in range(test_constants.STREAM_LENGTH):
yield _RESPONSE
def handle_stream_unary(trigger, request_iterator, servicer_context):
trigger.await_trigger()
return _RESPONSE
def handle_stream_stream(trigger, request_iterator, servicer_context):
trigger.await_trigger()
return
yield
class _MethodHandler(grpc.RpcMethodHandler):
def __init__(self, trigger, request_streaming, response_streaming):
self.request_streaming = request_streaming
self.response_streaming = response_streaming
self.request_deserializer = None
self.response_serializer = None
self.unary_unary = None
self.unary_stream = None
self.stream_unary = None
self.stream_stream = None
if self.request_streaming and self.response_streaming:
self.stream_stream = (
lambda x, y: handle_stream_stream(trigger, x, y))
elif self.request_streaming:
self.stream_unary = lambda x, y: handle_stream_unary(trigger, x, y)
elif self.response_streaming:
self.unary_stream = lambda x, y: handle_unary_stream(trigger, x, y)
else:
self.unary_unary = lambda x, y: handle_unary_unary(trigger, x, y)
class _GenericHandler(grpc.GenericRpcHandler):
def __init__(self, trigger):
self._trigger = trigger
def service(self, handler_call_details):
if handler_call_details.method == _UNARY_UNARY:
return _MethodHandler(self._trigger, False, False)
elif handler_call_details.method == _UNARY_STREAM:
return _MethodHandler(self._trigger, False, True)
elif handler_call_details.method == _STREAM_UNARY:
return _MethodHandler(self._trigger, True, False)
elif handler_call_details.method == _STREAM_STREAM:
return _MethodHandler(self._trigger, True, True)
else:
return None
class ResourceExhaustedTest(unittest.TestCase):
def setUp(self):
self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
self._trigger = _TestTrigger(test_constants.THREAD_CONCURRENCY)
self._server = grpc.server(
self._server_pool,
handlers=(_GenericHandler(self._trigger),),
options=(('grpc.so_reuseport', 0),),
maximum_concurrent_rpcs=test_constants.THREAD_CONCURRENCY)
port = self._server.add_insecure_port('[::]:0')
self._server.start()
self._channel = grpc.insecure_channel('localhost:%d' % port)
def tearDown(self):
self._server.stop(0)
def testUnaryUnary(self):
multi_callable = self._channel.unary_unary(_UNARY_UNARY)
futures = []
for _ in range(test_constants.THREAD_CONCURRENCY):
futures.append(multi_callable.future(_REQUEST))
self._trigger.await_calls()
with self.assertRaises(grpc.RpcError) as exception_context:
multi_callable(_REQUEST)
self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
exception_context.exception.code())
future_exception = multi_callable.future(_REQUEST)
self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
future_exception.exception().code())
self._trigger.trigger()
for future in futures:
self.assertEqual(_RESPONSE, future.result())
# Ensure a new request can be handled
self.assertEqual(_RESPONSE, multi_callable(_REQUEST))
def testUnaryStream(self):
multi_callable = self._channel.unary_stream(_UNARY_STREAM)
calls = []
for _ in range(test_constants.THREAD_CONCURRENCY):
calls.append(multi_callable(_REQUEST))
self._trigger.await_calls()
with self.assertRaises(grpc.RpcError) as exception_context:
next(multi_callable(_REQUEST))
self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
exception_context.exception.code())
self._trigger.trigger()
for call in calls:
for response in call:
self.assertEqual(_RESPONSE, response)
# Ensure a new request can be handled
new_call = multi_callable(_REQUEST)
for response in new_call:
self.assertEqual(_RESPONSE, response)
def testStreamUnary(self):
multi_callable = self._channel.stream_unary(_STREAM_UNARY)
futures = []
request = iter([_REQUEST] * test_constants.STREAM_LENGTH)
for _ in range(test_constants.THREAD_CONCURRENCY):
futures.append(multi_callable.future(request))
self._trigger.await_calls()
with self.assertRaises(grpc.RpcError) as exception_context:
multi_callable(request)
self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
exception_context.exception.code())
future_exception = multi_callable.future(request)
self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
future_exception.exception().code())
self._trigger.trigger()
for future in futures:
self.assertEqual(_RESPONSE, future.result())
# Ensure a new request can be handled
self.assertEqual(_RESPONSE, multi_callable(request))
def testStreamStream(self):
multi_callable = self._channel.stream_stream(_STREAM_STREAM)
calls = []
request = iter([_REQUEST] * test_constants.STREAM_LENGTH)
for _ in range(test_constants.THREAD_CONCURRENCY):
calls.append(multi_callable(request))
self._trigger.await_calls()
with self.assertRaises(grpc.RpcError) as exception_context:
next(multi_callable(request))
self.assertEqual(grpc.StatusCode.RESOURCE_EXHAUSTED,
exception_context.exception.code())
self._trigger.trigger()
for call in calls:
for response in call:
self.assertEqual(_RESPONSE, response)
# Ensure a new request can be handled
new_call = multi_callable(request)
for response in new_call:
self.assertEqual(_RESPONSE, response)
if __name__ == '__main__':
unittest.main(verbosity=2)
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