diff options
Diffstat (limited to 'src/python/grpcio_tests/tests/unit/_server_shutdown_scenarios.py')
-rw-r--r-- | src/python/grpcio_tests/tests/unit/_server_shutdown_scenarios.py | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/python/grpcio_tests/tests/unit/_server_shutdown_scenarios.py b/src/python/grpcio_tests/tests/unit/_server_shutdown_scenarios.py new file mode 100644 index 0000000000..1d1fdba11e --- /dev/null +++ b/src/python/grpcio_tests/tests/unit/_server_shutdown_scenarios.py @@ -0,0 +1,97 @@ +# 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. +"""Defines a number of module-scope gRPC scenarios to test server shutdown.""" + +import argparse +import os +import threading +import time +import logging + +import grpc +from tests.unit import test_common + +from concurrent import futures +from six.moves import queue + +WAIT_TIME = 1000 + +REQUEST = b'request' +RESPONSE = b'response' + +SERVER_RAISES_EXCEPTION = 'server_raises_exception' +SERVER_DEALLOCATED = 'server_deallocated' +SERVER_FORK_CAN_EXIT = 'server_fork_can_exit' + +FORK_EXIT = '/test/ForkExit' + + +def fork_and_exit(request, servicer_context): + pid = os.fork() + if pid == 0: + os._exit(0) + return RESPONSE + + +class GenericHandler(grpc.GenericRpcHandler): + + def service(self, handler_call_details): + if handler_call_details.method == FORK_EXIT: + return grpc.unary_unary_rpc_method_handler(fork_and_exit) + else: + return None + + +def run_server(port_queue): + server = test_common.test_server() + port = server.add_insecure_port('[::]:0') + port_queue.put(port) + server.add_generic_rpc_handlers((GenericHandler(),)) + server.start() + # threading.Event.wait() does not exhibit the bug identified in + # https://github.com/grpc/grpc/issues/17093, sleep instead + time.sleep(WAIT_TIME) + + +def run_test(args): + if args.scenario == SERVER_RAISES_EXCEPTION: + server = test_common.test_server() + server.start() + raise Exception() + elif args.scenario == SERVER_DEALLOCATED: + server = test_common.test_server() + server.start() + server.__del__() + while server._state.stage != grpc._server._ServerStage.STOPPED: + pass + elif args.scenario == SERVER_FORK_CAN_EXIT: + port_queue = queue.Queue() + thread = threading.Thread(target=run_server, args=(port_queue,)) + thread.daemon = True + thread.start() + port = port_queue.get() + channel = grpc.insecure_channel('localhost:%d' % port) + multi_callable = channel.unary_unary(FORK_EXIT) + result, call = multi_callable.with_call(REQUEST, wait_for_ready=True) + os.wait() + else: + raise ValueError('unknown test scenario') + + +if __name__ == '__main__': + logging.basicConfig() + parser = argparse.ArgumentParser() + parser.add_argument('scenario', type=str) + args = parser.parse_args() + run_test(args) |