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# Copyright 2015, 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
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import six
from grpc.framework.common import cardinality
from grpc.framework.face import exceptions as face_exceptions
from grpc.framework.face import interfaces as face_interfaces
from grpc.framework.foundation import future
from grpc.framework.alpha import exceptions
from grpc.framework.alpha import interfaces
_EARLY_ADOPTER_CARDINALITY_TO_COMMON_CARDINALITY = {
interfaces.Cardinality.UNARY_UNARY: cardinality.Cardinality.UNARY_UNARY,
interfaces.Cardinality.UNARY_STREAM: cardinality.Cardinality.UNARY_STREAM,
interfaces.Cardinality.STREAM_UNARY: cardinality.Cardinality.STREAM_UNARY,
interfaces.Cardinality.STREAM_STREAM: cardinality.Cardinality.STREAM_STREAM,
}
_ABORTION_REEXPORT = {
face_interfaces.Abortion.CANCELLED: interfaces.Abortion.CANCELLED,
face_interfaces.Abortion.EXPIRED: interfaces.Abortion.EXPIRED,
face_interfaces.Abortion.NETWORK_FAILURE:
interfaces.Abortion.NETWORK_FAILURE,
face_interfaces.Abortion.SERVICED_FAILURE:
interfaces.Abortion.SERVICED_FAILURE,
face_interfaces.Abortion.SERVICER_FAILURE:
interfaces.Abortion.SERVICER_FAILURE,
}
class _RpcError(exceptions.RpcError):
pass
def _reexport_error(face_rpc_error):
if isinstance(face_rpc_error, face_exceptions.CancellationError):
return exceptions.CancellationError()
elif isinstance(face_rpc_error, face_exceptions.ExpirationError):
return exceptions.ExpirationError()
else:
return _RpcError()
def _as_face_abortion_callback(abortion_callback):
def face_abortion_callback(face_abortion):
abortion_callback(_ABORTION_REEXPORT[face_abortion])
return face_abortion_callback
class _ReexportedFuture(future.Future):
def __init__(self, face_future):
self._face_future = face_future
def cancel(self):
return self._face_future.cancel()
def cancelled(self):
return self._face_future.cancelled()
def running(self):
return self._face_future.running()
def done(self):
return self._face_future.done()
def result(self, timeout=None):
try:
return self._face_future.result(timeout=timeout)
except face_exceptions.RpcError as e:
raise _reexport_error(e)
def exception(self, timeout=None):
face_error = self._face_future.exception(timeout=timeout)
return None if face_error is None else _reexport_error(face_error)
def traceback(self, timeout=None):
return self._face_future.traceback(timeout=timeout)
def add_done_callback(self, fn):
self._face_future.add_done_callback(lambda unused_face_future: fn(self))
def _call_reexporting_errors(behavior, *args, **kwargs):
try:
return behavior(*args, **kwargs)
except face_exceptions.RpcError as e:
raise _reexport_error(e)
def _reexported_future(face_future):
return _ReexportedFuture(face_future)
class _CancellableIterator(interfaces.CancellableIterator):
def __init__(self, face_cancellable_iterator):
self._face_cancellable_iterator = face_cancellable_iterator
def __iter__(self):
return self
def next(self):
return _call_reexporting_errors(self._face_cancellable_iterator.next)
def cancel(self):
self._face_cancellable_iterator.cancel()
class _RpcContext(interfaces.RpcContext):
def __init__(self, face_rpc_context):
self._face_rpc_context = face_rpc_context
def is_active(self):
return self._face_rpc_context.is_active()
def time_remaining(self):
return self._face_rpc_context.time_remaining()
def add_abortion_callback(self, abortion_callback):
self._face_rpc_context.add_abortion_callback(
_as_face_abortion_callback(abortion_callback))
class _UnaryUnarySyncAsync(interfaces.UnaryUnarySyncAsync):
def __init__(self, face_unary_unary_multi_callable):
self._underlying = face_unary_unary_multi_callable
def __call__(self, request, timeout):
return _call_reexporting_errors(
self._underlying, request, timeout)
def async(self, request, timeout):
return _ReexportedFuture(self._underlying.future(request, timeout))
class _StreamUnarySyncAsync(interfaces.StreamUnarySyncAsync):
def __init__(self, face_stream_unary_multi_callable):
self._underlying = face_stream_unary_multi_callable
def __call__(self, request_iterator, timeout):
return _call_reexporting_errors(
self._underlying, request_iterator, timeout)
def async(self, request_iterator, timeout):
return _ReexportedFuture(self._underlying.future(request_iterator, timeout))
def common_cardinality(early_adopter_cardinality):
return _EARLY_ADOPTER_CARDINALITY_TO_COMMON_CARDINALITY[
early_adopter_cardinality]
def common_cardinalities(early_adopter_cardinalities):
common_cardinalities = {}
for name, early_adopter_cardinality in six.iteritems(early_adopter_cardinalities):
common_cardinalities[name] = _EARLY_ADOPTER_CARDINALITY_TO_COMMON_CARDINALITY[
early_adopter_cardinality]
return common_cardinalities
def rpc_context(face_rpc_context):
return _RpcContext(face_rpc_context)
def cancellable_iterator(face_cancellable_iterator):
return _CancellableIterator(face_cancellable_iterator)
def unary_unary_sync_async(face_unary_unary_multi_callable):
return _UnaryUnarySyncAsync(face_unary_unary_multi_callable)
def stream_unary_sync_async(face_stream_unary_multi_callable):
return _StreamUnarySyncAsync(face_stream_unary_multi_callable)
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