706 lines
27 KiB
Python
706 lines
27 KiB
Python
# Copyright 2016 gRPC authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Translates gRPC's client-side API into gRPC's client-side Beta API."""
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import grpc
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from grpc import _common
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from grpc.beta import _metadata
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from grpc.beta import interfaces
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from grpc.framework.common import cardinality
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from grpc.framework.foundation import future
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from grpc.framework.interfaces.face import face
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# pylint: disable=too-many-arguments,too-many-locals,unused-argument
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_STATUS_CODE_TO_ABORTION_KIND_AND_ABORTION_ERROR_CLASS = {
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grpc.StatusCode.CANCELLED:
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(face.Abortion.Kind.CANCELLED, face.CancellationError),
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grpc.StatusCode.UNKNOWN:
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(face.Abortion.Kind.REMOTE_FAILURE, face.RemoteError),
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grpc.StatusCode.DEADLINE_EXCEEDED:
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(face.Abortion.Kind.EXPIRED, face.ExpirationError),
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grpc.StatusCode.UNIMPLEMENTED:
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(face.Abortion.Kind.LOCAL_FAILURE, face.LocalError),
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}
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def _effective_metadata(metadata, metadata_transformer):
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non_none_metadata = () if metadata is None else metadata
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if metadata_transformer is None:
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return non_none_metadata
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else:
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return metadata_transformer(non_none_metadata)
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def _credentials(grpc_call_options):
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return None if grpc_call_options is None else grpc_call_options.credentials
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def _abortion(rpc_error_call):
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code = rpc_error_call.code()
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pair = _STATUS_CODE_TO_ABORTION_KIND_AND_ABORTION_ERROR_CLASS.get(code)
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error_kind = face.Abortion.Kind.LOCAL_FAILURE if pair is None else pair[0]
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return face.Abortion(error_kind, rpc_error_call.initial_metadata(),
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rpc_error_call.trailing_metadata(), code,
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rpc_error_call.details())
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def _abortion_error(rpc_error_call):
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code = rpc_error_call.code()
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pair = _STATUS_CODE_TO_ABORTION_KIND_AND_ABORTION_ERROR_CLASS.get(code)
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exception_class = face.AbortionError if pair is None else pair[1]
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return exception_class(rpc_error_call.initial_metadata(),
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rpc_error_call.trailing_metadata(), code,
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rpc_error_call.details())
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class _InvocationProtocolContext(interfaces.GRPCInvocationContext):
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def disable_next_request_compression(self):
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pass # TODO(https://github.com/grpc/grpc/issues/4078): design, implement.
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class _Rendezvous(future.Future, face.Call):
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def __init__(self, response_future, response_iterator, call):
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self._future = response_future
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self._iterator = response_iterator
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self._call = call
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def cancel(self):
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return self._call.cancel()
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def cancelled(self):
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return self._future.cancelled()
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def running(self):
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return self._future.running()
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def done(self):
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return self._future.done()
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def result(self, timeout=None):
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try:
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return self._future.result(timeout=timeout)
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except grpc.RpcError as rpc_error_call:
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raise _abortion_error(rpc_error_call)
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except grpc.FutureTimeoutError:
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raise future.TimeoutError()
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except grpc.FutureCancelledError:
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raise future.CancelledError()
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def exception(self, timeout=None):
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try:
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rpc_error_call = self._future.exception(timeout=timeout)
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if rpc_error_call is None:
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return None
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else:
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return _abortion_error(rpc_error_call)
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except grpc.FutureTimeoutError:
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raise future.TimeoutError()
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except grpc.FutureCancelledError:
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raise future.CancelledError()
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def traceback(self, timeout=None):
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try:
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return self._future.traceback(timeout=timeout)
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except grpc.FutureTimeoutError:
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raise future.TimeoutError()
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except grpc.FutureCancelledError:
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raise future.CancelledError()
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def add_done_callback(self, fn):
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self._future.add_done_callback(lambda ignored_callback: fn(self))
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def __iter__(self):
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return self
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def _next(self):
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try:
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return next(self._iterator)
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except grpc.RpcError as rpc_error_call:
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raise _abortion_error(rpc_error_call)
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def __next__(self):
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return self._next()
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def next(self):
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return self._next()
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def is_active(self):
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return self._call.is_active()
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def time_remaining(self):
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return self._call.time_remaining()
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def add_abortion_callback(self, abortion_callback):
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def done_callback():
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if self.code() is not grpc.StatusCode.OK:
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abortion_callback(_abortion(self._call))
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registered = self._call.add_callback(done_callback)
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return None if registered else done_callback()
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def protocol_context(self):
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return _InvocationProtocolContext()
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def initial_metadata(self):
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return _metadata.beta(self._call.initial_metadata())
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def terminal_metadata(self):
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return _metadata.beta(self._call.terminal_metadata())
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def code(self):
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return self._call.code()
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def details(self):
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return self._call.details()
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def _blocking_unary_unary(channel, group, method, timeout, with_call,
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protocol_options, metadata, metadata_transformer,
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request, request_serializer, response_deserializer):
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try:
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multi_callable = channel.unary_unary(
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_common.fully_qualified_method(group, method),
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request_serializer=request_serializer,
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response_deserializer=response_deserializer)
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effective_metadata = _effective_metadata(metadata, metadata_transformer)
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if with_call:
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response, call = multi_callable.with_call(
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request,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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return response, _Rendezvous(None, None, call)
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else:
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return multi_callable(request,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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except grpc.RpcError as rpc_error_call:
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raise _abortion_error(rpc_error_call)
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def _future_unary_unary(channel, group, method, timeout, protocol_options,
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metadata, metadata_transformer, request,
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request_serializer, response_deserializer):
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multi_callable = channel.unary_unary(
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_common.fully_qualified_method(group, method),
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request_serializer=request_serializer,
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response_deserializer=response_deserializer)
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effective_metadata = _effective_metadata(metadata, metadata_transformer)
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response_future = multi_callable.future(
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request,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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return _Rendezvous(response_future, None, response_future)
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def _unary_stream(channel, group, method, timeout, protocol_options, metadata,
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metadata_transformer, request, request_serializer,
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response_deserializer):
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multi_callable = channel.unary_stream(
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_common.fully_qualified_method(group, method),
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request_serializer=request_serializer,
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response_deserializer=response_deserializer)
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effective_metadata = _effective_metadata(metadata, metadata_transformer)
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response_iterator = multi_callable(
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request,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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return _Rendezvous(None, response_iterator, response_iterator)
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def _blocking_stream_unary(channel, group, method, timeout, with_call,
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protocol_options, metadata, metadata_transformer,
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request_iterator, request_serializer,
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response_deserializer):
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try:
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multi_callable = channel.stream_unary(
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_common.fully_qualified_method(group, method),
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request_serializer=request_serializer,
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response_deserializer=response_deserializer)
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effective_metadata = _effective_metadata(metadata, metadata_transformer)
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if with_call:
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response, call = multi_callable.with_call(
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request_iterator,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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return response, _Rendezvous(None, None, call)
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else:
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return multi_callable(request_iterator,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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except grpc.RpcError as rpc_error_call:
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raise _abortion_error(rpc_error_call)
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def _future_stream_unary(channel, group, method, timeout, protocol_options,
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metadata, metadata_transformer, request_iterator,
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request_serializer, response_deserializer):
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multi_callable = channel.stream_unary(
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_common.fully_qualified_method(group, method),
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request_serializer=request_serializer,
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response_deserializer=response_deserializer)
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effective_metadata = _effective_metadata(metadata, metadata_transformer)
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response_future = multi_callable.future(
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request_iterator,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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return _Rendezvous(response_future, None, response_future)
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def _stream_stream(channel, group, method, timeout, protocol_options, metadata,
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metadata_transformer, request_iterator, request_serializer,
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response_deserializer):
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multi_callable = channel.stream_stream(
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_common.fully_qualified_method(group, method),
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request_serializer=request_serializer,
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response_deserializer=response_deserializer)
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effective_metadata = _effective_metadata(metadata, metadata_transformer)
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response_iterator = multi_callable(
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request_iterator,
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timeout=timeout,
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metadata=_metadata.unbeta(effective_metadata),
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credentials=_credentials(protocol_options))
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return _Rendezvous(None, response_iterator, response_iterator)
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class _UnaryUnaryMultiCallable(face.UnaryUnaryMultiCallable):
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def __init__(self, channel, group, method, metadata_transformer,
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request_serializer, response_deserializer):
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self._channel = channel
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self._group = group
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self._method = method
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self._metadata_transformer = metadata_transformer
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self._request_serializer = request_serializer
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self._response_deserializer = response_deserializer
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def __call__(self,
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request,
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timeout,
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metadata=None,
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with_call=False,
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protocol_options=None):
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return _blocking_unary_unary(self._channel, self._group, self._method,
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timeout, with_call, protocol_options,
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metadata, self._metadata_transformer,
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request, self._request_serializer,
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self._response_deserializer)
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def future(self, request, timeout, metadata=None, protocol_options=None):
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return _future_unary_unary(self._channel, self._group, self._method,
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timeout, protocol_options, metadata,
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self._metadata_transformer, request,
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self._request_serializer,
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self._response_deserializer)
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def event(self,
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request,
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receiver,
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abortion_callback,
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timeout,
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metadata=None,
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protocol_options=None):
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raise NotImplementedError()
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class _UnaryStreamMultiCallable(face.UnaryStreamMultiCallable):
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def __init__(self, channel, group, method, metadata_transformer,
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request_serializer, response_deserializer):
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self._channel = channel
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self._group = group
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self._method = method
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self._metadata_transformer = metadata_transformer
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self._request_serializer = request_serializer
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self._response_deserializer = response_deserializer
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def __call__(self, request, timeout, metadata=None, protocol_options=None):
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return _unary_stream(self._channel, self._group, self._method, timeout,
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protocol_options, metadata,
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self._metadata_transformer, request,
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self._request_serializer,
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self._response_deserializer)
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def event(self,
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request,
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receiver,
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abortion_callback,
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timeout,
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metadata=None,
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protocol_options=None):
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raise NotImplementedError()
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class _StreamUnaryMultiCallable(face.StreamUnaryMultiCallable):
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def __init__(self, channel, group, method, metadata_transformer,
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request_serializer, response_deserializer):
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self._channel = channel
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self._group = group
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self._method = method
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self._metadata_transformer = metadata_transformer
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self._request_serializer = request_serializer
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self._response_deserializer = response_deserializer
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def __call__(self,
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request_iterator,
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timeout,
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metadata=None,
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with_call=False,
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protocol_options=None):
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return _blocking_stream_unary(self._channel, self._group, self._method,
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timeout, with_call, protocol_options,
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metadata, self._metadata_transformer,
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request_iterator,
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self._request_serializer,
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self._response_deserializer)
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def future(self,
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request_iterator,
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timeout,
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metadata=None,
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protocol_options=None):
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return _future_stream_unary(self._channel, self._group, self._method,
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timeout, protocol_options, metadata,
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self._metadata_transformer,
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request_iterator, self._request_serializer,
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self._response_deserializer)
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def event(self,
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receiver,
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abortion_callback,
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timeout,
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metadata=None,
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protocol_options=None):
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raise NotImplementedError()
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class _StreamStreamMultiCallable(face.StreamStreamMultiCallable):
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def __init__(self, channel, group, method, metadata_transformer,
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request_serializer, response_deserializer):
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self._channel = channel
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self._group = group
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self._method = method
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self._metadata_transformer = metadata_transformer
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self._request_serializer = request_serializer
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self._response_deserializer = response_deserializer
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def __call__(self,
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request_iterator,
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timeout,
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metadata=None,
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protocol_options=None):
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return _stream_stream(self._channel, self._group, self._method, timeout,
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protocol_options, metadata,
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self._metadata_transformer, request_iterator,
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self._request_serializer,
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self._response_deserializer)
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def event(self,
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receiver,
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abortion_callback,
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timeout,
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metadata=None,
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protocol_options=None):
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raise NotImplementedError()
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class _GenericStub(face.GenericStub):
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def __init__(self, channel, metadata_transformer, request_serializers,
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response_deserializers):
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self._channel = channel
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self._metadata_transformer = metadata_transformer
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self._request_serializers = request_serializers or {}
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self._response_deserializers = response_deserializers or {}
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def blocking_unary_unary(self,
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group,
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method,
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request,
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timeout,
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metadata=None,
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with_call=None,
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protocol_options=None):
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request_serializer = self._request_serializers.get((
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group,
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method,
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))
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response_deserializer = self._response_deserializers.get((
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group,
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method,
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))
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return _blocking_unary_unary(self._channel, group, method, timeout,
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with_call, protocol_options, metadata,
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self._metadata_transformer, request,
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request_serializer, response_deserializer)
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def future_unary_unary(self,
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group,
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method,
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request,
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timeout,
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metadata=None,
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protocol_options=None):
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request_serializer = self._request_serializers.get((
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group,
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method,
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))
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response_deserializer = self._response_deserializers.get((
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group,
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method,
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))
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return _future_unary_unary(self._channel, group, method, timeout,
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protocol_options, metadata,
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self._metadata_transformer, request,
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request_serializer, response_deserializer)
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def inline_unary_stream(self,
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group,
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method,
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request,
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timeout,
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metadata=None,
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protocol_options=None):
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request_serializer = self._request_serializers.get((
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group,
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method,
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))
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response_deserializer = self._response_deserializers.get((
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group,
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method,
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))
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return _unary_stream(self._channel, group, method, timeout,
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protocol_options, metadata,
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self._metadata_transformer, request,
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request_serializer, response_deserializer)
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def blocking_stream_unary(self,
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group,
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method,
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request_iterator,
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timeout,
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metadata=None,
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with_call=None,
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protocol_options=None):
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request_serializer = self._request_serializers.get((
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group,
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method,
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))
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response_deserializer = self._response_deserializers.get((
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group,
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method,
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))
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return _blocking_stream_unary(self._channel, group, method, timeout,
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with_call, protocol_options, metadata,
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self._metadata_transformer,
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request_iterator, request_serializer,
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response_deserializer)
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def future_stream_unary(self,
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group,
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method,
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request_iterator,
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timeout,
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metadata=None,
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protocol_options=None):
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request_serializer = self._request_serializers.get((
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group,
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method,
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))
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response_deserializer = self._response_deserializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
return _future_stream_unary(self._channel, group, method, timeout,
|
|
protocol_options, metadata,
|
|
self._metadata_transformer,
|
|
request_iterator, request_serializer,
|
|
response_deserializer)
|
|
|
|
def inline_stream_stream(self,
|
|
group,
|
|
method,
|
|
request_iterator,
|
|
timeout,
|
|
metadata=None,
|
|
protocol_options=None):
|
|
request_serializer = self._request_serializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
response_deserializer = self._response_deserializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
return _stream_stream(self._channel, group, method, timeout,
|
|
protocol_options, metadata,
|
|
self._metadata_transformer, request_iterator,
|
|
request_serializer, response_deserializer)
|
|
|
|
def event_unary_unary(self,
|
|
group,
|
|
method,
|
|
request,
|
|
receiver,
|
|
abortion_callback,
|
|
timeout,
|
|
metadata=None,
|
|
protocol_options=None):
|
|
raise NotImplementedError()
|
|
|
|
def event_unary_stream(self,
|
|
group,
|
|
method,
|
|
request,
|
|
receiver,
|
|
abortion_callback,
|
|
timeout,
|
|
metadata=None,
|
|
protocol_options=None):
|
|
raise NotImplementedError()
|
|
|
|
def event_stream_unary(self,
|
|
group,
|
|
method,
|
|
receiver,
|
|
abortion_callback,
|
|
timeout,
|
|
metadata=None,
|
|
protocol_options=None):
|
|
raise NotImplementedError()
|
|
|
|
def event_stream_stream(self,
|
|
group,
|
|
method,
|
|
receiver,
|
|
abortion_callback,
|
|
timeout,
|
|
metadata=None,
|
|
protocol_options=None):
|
|
raise NotImplementedError()
|
|
|
|
def unary_unary(self, group, method):
|
|
request_serializer = self._request_serializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
response_deserializer = self._response_deserializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
return _UnaryUnaryMultiCallable(self._channel, group, method,
|
|
self._metadata_transformer,
|
|
request_serializer,
|
|
response_deserializer)
|
|
|
|
def unary_stream(self, group, method):
|
|
request_serializer = self._request_serializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
response_deserializer = self._response_deserializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
return _UnaryStreamMultiCallable(self._channel, group, method,
|
|
self._metadata_transformer,
|
|
request_serializer,
|
|
response_deserializer)
|
|
|
|
def stream_unary(self, group, method):
|
|
request_serializer = self._request_serializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
response_deserializer = self._response_deserializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
return _StreamUnaryMultiCallable(self._channel, group, method,
|
|
self._metadata_transformer,
|
|
request_serializer,
|
|
response_deserializer)
|
|
|
|
def stream_stream(self, group, method):
|
|
request_serializer = self._request_serializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
response_deserializer = self._response_deserializers.get((
|
|
group,
|
|
method,
|
|
))
|
|
return _StreamStreamMultiCallable(self._channel, group, method,
|
|
self._metadata_transformer,
|
|
request_serializer,
|
|
response_deserializer)
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, exc_type, exc_val, exc_tb):
|
|
return False
|
|
|
|
|
|
class _DynamicStub(face.DynamicStub):
|
|
|
|
def __init__(self, backing_generic_stub, group, cardinalities):
|
|
self._generic_stub = backing_generic_stub
|
|
self._group = group
|
|
self._cardinalities = cardinalities
|
|
|
|
def __getattr__(self, attr):
|
|
method_cardinality = self._cardinalities.get(attr)
|
|
if method_cardinality is cardinality.Cardinality.UNARY_UNARY:
|
|
return self._generic_stub.unary_unary(self._group, attr)
|
|
elif method_cardinality is cardinality.Cardinality.UNARY_STREAM:
|
|
return self._generic_stub.unary_stream(self._group, attr)
|
|
elif method_cardinality is cardinality.Cardinality.STREAM_UNARY:
|
|
return self._generic_stub.stream_unary(self._group, attr)
|
|
elif method_cardinality is cardinality.Cardinality.STREAM_STREAM:
|
|
return self._generic_stub.stream_stream(self._group, attr)
|
|
else:
|
|
raise AttributeError('_DynamicStub object has no attribute "%s"!' %
|
|
attr)
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, exc_type, exc_val, exc_tb):
|
|
return False
|
|
|
|
|
|
def generic_stub(channel, host, metadata_transformer, request_serializers,
|
|
response_deserializers):
|
|
return _GenericStub(channel, metadata_transformer, request_serializers,
|
|
response_deserializers)
|
|
|
|
|
|
def dynamic_stub(channel, service, cardinalities, host, metadata_transformer,
|
|
request_serializers, response_deserializers):
|
|
return _DynamicStub(
|
|
_GenericStub(channel, metadata_transformer, request_serializers,
|
|
response_deserializers), service, cardinalities)
|