| # 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 |
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| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| """Test a corner-case at the level of the Cython API.""" |
| |
| import threading |
| import unittest |
| |
| from grpc._cython import cygrpc |
| |
| _INFINITE_FUTURE = cygrpc.Timespec(float('+inf')) |
| _EMPTY_FLAGS = 0 |
| _EMPTY_METADATA = cygrpc.Metadata(()) |
| |
| |
| class _ServerDriver(object): |
| |
| def __init__(self, completion_queue, shutdown_tag): |
| self._condition = threading.Condition() |
| self._completion_queue = completion_queue |
| self._shutdown_tag = shutdown_tag |
| self._events = [] |
| self._saw_shutdown_tag = False |
| |
| def start(self): |
| def in_thread(): |
| while True: |
| event = self._completion_queue.poll() |
| with self._condition: |
| self._events.append(event) |
| self._condition.notify() |
| if event.tag is self._shutdown_tag: |
| self._saw_shutdown_tag = True |
| break |
| thread = threading.Thread(target=in_thread) |
| thread.start() |
| |
| def done(self): |
| with self._condition: |
| return self._saw_shutdown_tag |
| |
| def first_event(self): |
| with self._condition: |
| while not self._events: |
| self._condition.wait() |
| return self._events[0] |
| |
| def events(self): |
| with self._condition: |
| while not self._saw_shutdown_tag: |
| self._condition.wait() |
| return tuple(self._events) |
| |
| |
| class _QueueDriver(object): |
| |
| def __init__(self, condition, completion_queue, due): |
| self._condition = condition |
| self._completion_queue = completion_queue |
| self._due = due |
| self._events = [] |
| self._returned = False |
| |
| def start(self): |
| def in_thread(): |
| while True: |
| event = self._completion_queue.poll() |
| with self._condition: |
| self._events.append(event) |
| self._due.remove(event.tag) |
| self._condition.notify_all() |
| if not self._due: |
| self._returned = True |
| return |
| thread = threading.Thread(target=in_thread) |
| thread.start() |
| |
| def done(self): |
| with self._condition: |
| return self._returned |
| |
| def event_with_tag(self, tag): |
| with self._condition: |
| while True: |
| for event in self._events: |
| if event.tag is tag: |
| return event |
| self._condition.wait() |
| |
| def events(self): |
| with self._condition: |
| while not self._returned: |
| self._condition.wait() |
| return tuple(self._events) |
| |
| |
| class ReadSomeButNotAllResponsesTest(unittest.TestCase): |
| |
| def testReadSomeButNotAllResponses(self): |
| server_completion_queue = cygrpc.CompletionQueue() |
| server = cygrpc.Server() |
| server.register_completion_queue(server_completion_queue) |
| port = server.add_http2_port('[::]:0') |
| server.start() |
| channel = cygrpc.Channel('localhost:{}'.format(port)) |
| |
| server_shutdown_tag = 'server_shutdown_tag' |
| server_driver = _ServerDriver(server_completion_queue, server_shutdown_tag) |
| server_driver.start() |
| |
| client_condition = threading.Condition() |
| client_due = set() |
| client_completion_queue = cygrpc.CompletionQueue() |
| client_driver = _QueueDriver( |
| client_condition, client_completion_queue, client_due) |
| client_driver.start() |
| |
| server_call_condition = threading.Condition() |
| server_send_initial_metadata_tag = 'server_send_initial_metadata_tag' |
| server_send_first_message_tag = 'server_send_first_message_tag' |
| server_send_second_message_tag = 'server_send_second_message_tag' |
| server_complete_rpc_tag = 'server_complete_rpc_tag' |
| server_call_due = set(( |
| server_send_initial_metadata_tag, |
| server_send_first_message_tag, |
| server_send_second_message_tag, |
| server_complete_rpc_tag, |
| )) |
| server_call_completion_queue = cygrpc.CompletionQueue() |
| server_call_driver = _QueueDriver( |
| server_call_condition, server_call_completion_queue, server_call_due) |
| server_call_driver.start() |
| |
| server_rpc_tag = 'server_rpc_tag' |
| request_call_result = server.request_call( |
| server_call_completion_queue, server_completion_queue, server_rpc_tag) |
| |
| client_call = channel.create_call( |
| None, _EMPTY_FLAGS, client_completion_queue, b'/twinkies', None, |
| _INFINITE_FUTURE) |
| client_receive_initial_metadata_tag = 'client_receive_initial_metadata_tag' |
| client_complete_rpc_tag = 'client_complete_rpc_tag' |
| with client_condition: |
| client_receive_initial_metadata_start_batch_result = ( |
| client_call.start_batch(cygrpc.Operations([ |
| cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS), |
| ]), client_receive_initial_metadata_tag)) |
| client_due.add(client_receive_initial_metadata_tag) |
| client_complete_rpc_start_batch_result = ( |
| client_call.start_batch(cygrpc.Operations([ |
| cygrpc.operation_send_initial_metadata( |
| _EMPTY_METADATA, _EMPTY_FLAGS), |
| cygrpc.operation_send_close_from_client(_EMPTY_FLAGS), |
| cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS), |
| ]), client_complete_rpc_tag)) |
| client_due.add(client_complete_rpc_tag) |
| |
| server_rpc_event = server_driver.first_event() |
| |
| with server_call_condition: |
| server_send_initial_metadata_start_batch_result = ( |
| server_rpc_event.operation_call.start_batch(cygrpc.Operations([ |
| cygrpc.operation_send_initial_metadata( |
| _EMPTY_METADATA, _EMPTY_FLAGS), |
| ]), server_send_initial_metadata_tag)) |
| server_send_first_message_start_batch_result = ( |
| server_rpc_event.operation_call.start_batch(cygrpc.Operations([ |
| cygrpc.operation_send_message(b'\x07', _EMPTY_FLAGS), |
| ]), server_send_first_message_tag)) |
| server_send_initial_metadata_event = server_call_driver.event_with_tag( |
| server_send_initial_metadata_tag) |
| server_send_first_message_event = server_call_driver.event_with_tag( |
| server_send_first_message_tag) |
| with server_call_condition: |
| server_send_second_message_start_batch_result = ( |
| server_rpc_event.operation_call.start_batch(cygrpc.Operations([ |
| cygrpc.operation_send_message(b'\x07', _EMPTY_FLAGS), |
| ]), server_send_second_message_tag)) |
| server_complete_rpc_start_batch_result = ( |
| server_rpc_event.operation_call.start_batch(cygrpc.Operations([ |
| cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS), |
| cygrpc.operation_send_status_from_server( |
| cygrpc.Metadata(()), cygrpc.StatusCode.ok, b'test details', |
| _EMPTY_FLAGS), |
| ]), server_complete_rpc_tag)) |
| server_send_second_message_event = server_call_driver.event_with_tag( |
| server_send_second_message_tag) |
| server_complete_rpc_event = server_call_driver.event_with_tag( |
| server_complete_rpc_tag) |
| server_call_driver.events() |
| |
| with client_condition: |
| client_receive_first_message_tag = 'client_receive_first_message_tag' |
| client_receive_first_message_start_batch_result = ( |
| client_call.start_batch(cygrpc.Operations([ |
| cygrpc.operation_receive_message(_EMPTY_FLAGS), |
| ]), client_receive_first_message_tag)) |
| client_due.add(client_receive_first_message_tag) |
| client_receive_first_message_event = client_driver.event_with_tag( |
| client_receive_first_message_tag) |
| |
| client_call_cancel_result = client_call.cancel() |
| client_driver.events() |
| |
| server.shutdown(server_completion_queue, server_shutdown_tag) |
| server.cancel_all_calls() |
| server_driver.events() |
| |
| self.assertEqual(cygrpc.CallError.ok, request_call_result) |
| self.assertEqual( |
| cygrpc.CallError.ok, server_send_initial_metadata_start_batch_result) |
| self.assertEqual( |
| cygrpc.CallError.ok, client_receive_initial_metadata_start_batch_result) |
| self.assertEqual( |
| cygrpc.CallError.ok, client_complete_rpc_start_batch_result) |
| self.assertEqual(cygrpc.CallError.ok, client_call_cancel_result) |
| self.assertIs(server_rpc_tag, server_rpc_event.tag) |
| self.assertEqual( |
| cygrpc.CompletionType.operation_complete, server_rpc_event.type) |
| self.assertIsInstance(server_rpc_event.operation_call, cygrpc.Call) |
| self.assertEqual(0, len(server_rpc_event.batch_operations)) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(verbosity=2) |