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# 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
# 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.
"""Shared implementation."""
import logging
import six
import grpc
from grpc._cython import cygrpc
_EMPTY_METADATA = cygrpc.Metadata(())
CYGRPC_CONNECTIVITY_STATE_TO_CHANNEL_CONNECTIVITY = {
cygrpc.ConnectivityState.idle: grpc.ChannelConnectivity.IDLE,
cygrpc.ConnectivityState.connecting: grpc.ChannelConnectivity.CONNECTING,
cygrpc.ConnectivityState.ready: grpc.ChannelConnectivity.READY,
cygrpc.ConnectivityState.transient_failure:
grpc.ChannelConnectivity.TRANSIENT_FAILURE,
cygrpc.ConnectivityState.fatal_failure:
grpc.ChannelConnectivity.FATAL_FAILURE,
}
CYGRPC_STATUS_CODE_TO_STATUS_CODE = {
cygrpc.StatusCode.ok: grpc.StatusCode.OK,
cygrpc.StatusCode.cancelled: grpc.StatusCode.CANCELLED,
cygrpc.StatusCode.unknown: grpc.StatusCode.UNKNOWN,
cygrpc.StatusCode.invalid_argument: grpc.StatusCode.INVALID_ARGUMENT,
cygrpc.StatusCode.deadline_exceeded: grpc.StatusCode.DEADLINE_EXCEEDED,
cygrpc.StatusCode.not_found: grpc.StatusCode.NOT_FOUND,
cygrpc.StatusCode.already_exists: grpc.StatusCode.ALREADY_EXISTS,
cygrpc.StatusCode.permission_denied: grpc.StatusCode.PERMISSION_DENIED,
cygrpc.StatusCode.unauthenticated: grpc.StatusCode.UNAUTHENTICATED,
cygrpc.StatusCode.resource_exhausted: grpc.StatusCode.RESOURCE_EXHAUSTED,
cygrpc.StatusCode.failed_precondition: grpc.StatusCode.FAILED_PRECONDITION,
cygrpc.StatusCode.aborted: grpc.StatusCode.ABORTED,
cygrpc.StatusCode.out_of_range: grpc.StatusCode.OUT_OF_RANGE,
cygrpc.StatusCode.unimplemented: grpc.StatusCode.UNIMPLEMENTED,
cygrpc.StatusCode.internal: grpc.StatusCode.INTERNAL,
cygrpc.StatusCode.unavailable: grpc.StatusCode.UNAVAILABLE,
cygrpc.StatusCode.data_loss: grpc.StatusCode.DATA_LOSS,
}
STATUS_CODE_TO_CYGRPC_STATUS_CODE = {
grpc_code: cygrpc_code
for cygrpc_code, grpc_code in six.iteritems(
CYGRPC_STATUS_CODE_TO_STATUS_CODE)
}
def metadata(application_metadata):
return _EMPTY_METADATA if application_metadata is None else cygrpc.Metadata(
cygrpc.Metadatum(key, value) for key, value in application_metadata)
def _transform(message, transformer, exception_message):
if transformer is None:
return message
else:
try:
return transformer(message)
except Exception: # pylint: disable=broad-except
logging.exception(exception_message)
return None
def serialize(message, serializer):
return _transform(message, serializer, 'Exception serializing message!')
def deserialize(serialized_message, deserializer):
return _transform(serialized_message, deserializer,
'Exception deserializing message!')
def _encode(s):
if isinstance(s, bytes):
return s
else:
return s.encode('ascii')
def fully_qualified_method(group, method):
group = _encode(group)
method = _encode(method)
return b'/' + group + b'/' + method
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