# 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)