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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.
import threading
import grpc
from grpc_testing import _common
class State(_common.ChannelRpcHandler):
def __init__(self, invocation_metadata, requests, requests_closed):
self._condition = threading.Condition()
self._invocation_metadata = invocation_metadata
self._requests = requests
self._requests_closed = requests_closed
self._initial_metadata = None
self._responses = []
self._trailing_metadata = None
self._code = None
self._details = None
def initial_metadata(self):
with self._condition:
while True:
if self._initial_metadata is None:
if self._code is None:
self._condition.wait()
else:
return _common.FUSSED_EMPTY_METADATA
else:
return self._initial_metadata
def add_request(self, request):
with self._condition:
if self._code is None and not self._requests_closed:
self._requests.append(request)
self._condition.notify_all()
return True
else:
return False
def close_requests(self):
with self._condition:
if self._code is None and not self._requests_closed:
self._requests_closed = True
self._condition.notify_all()
def take_response(self):
with self._condition:
while True:
if self._code is grpc.StatusCode.OK:
if self._responses:
response = self._responses.pop(0)
return _common.ChannelRpcRead(
response, None, None, None)
else:
return _common.ChannelRpcRead(
None, self._trailing_metadata,
grpc.StatusCode.OK, self._details)
elif self._code is None:
if self._responses:
response = self._responses.pop(0)
return _common.ChannelRpcRead(
response, None, None, None)
else:
self._condition.wait()
else:
return _common.ChannelRpcRead(
None, self._trailing_metadata, self._code,
self._details)
def termination(self):
with self._condition:
while True:
if self._code is None:
self._condition.wait()
else:
return self._trailing_metadata, self._code, self._details
def cancel(self, code, details):
with self._condition:
if self._code is None:
if self._initial_metadata is None:
self._initial_metadata = _common.FUSSED_EMPTY_METADATA
self._trailing_metadata = _common.FUSSED_EMPTY_METADATA
self._code = code
self._details = details
self._condition.notify_all()
return True
else:
return False
def take_invocation_metadata(self):
with self._condition:
if self._invocation_metadata is None:
raise ValueError('Expected invocation metadata!')
else:
invocation_metadata = self._invocation_metadata
self._invocation_metadata = None
return invocation_metadata
def take_invocation_metadata_and_request(self):
with self._condition:
if self._invocation_metadata is None:
raise ValueError('Expected invocation metadata!')
elif not self._requests:
raise ValueError('Expected at least one request!')
else:
invocation_metadata = self._invocation_metadata
self._invocation_metadata = None
return invocation_metadata, self._requests.pop(0)
def send_initial_metadata(self, initial_metadata):
with self._condition:
self._initial_metadata = _common.fuss_with_metadata(
initial_metadata)
self._condition.notify_all()
def take_request(self):
with self._condition:
while True:
if self._requests:
return self._requests.pop(0)
else:
self._condition.wait()
def requests_closed(self):
with self._condition:
while True:
if self._requests_closed:
return
else:
self._condition.wait()
def send_response(self, response):
with self._condition:
if self._code is None:
self._responses.append(response)
self._condition.notify_all()
def terminate_with_response(
self, response, trailing_metadata, code, details):
with self._condition:
if self._initial_metadata is None:
self._initial_metadata = _common.FUSSED_EMPTY_METADATA
self._responses.append(response)
self._trailing_metadata = _common.fuss_with_metadata(
trailing_metadata)
self._code = code
self._details = details
self._condition.notify_all()
def terminate(self, trailing_metadata, code, details):
with self._condition:
if self._initial_metadata is None:
self._initial_metadata = _common.FUSSED_EMPTY_METADATA
self._trailing_metadata = _common.fuss_with_metadata(
trailing_metadata)
self._code = code
self._details = details
self._condition.notify_all()
def cancelled(self):
with self._condition:
while True:
if self._code is grpc.StatusCode.CANCELLED:
return
elif self._code is None:
self._condition.wait()
else:
raise ValueError(
'Status code unexpectedly {}!'.format(self._code))
def is_active(self):
raise NotImplementedError()
def time_remaining(self):
raise NotImplementedError()
def add_callback(self, callback):
raise NotImplementedError()
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