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# Copyright 2015 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.
"""Coverage across the Face layer's generic-to-dynamic range for invocation."""
import abc
import six
from grpc.framework.common import cardinality
_CARDINALITY_TO_GENERIC_BLOCKING_BEHAVIOR = {
cardinality.Cardinality.UNARY_UNARY: 'blocking_unary_unary',
cardinality.Cardinality.UNARY_STREAM: 'inline_unary_stream',
cardinality.Cardinality.STREAM_UNARY: 'blocking_stream_unary',
cardinality.Cardinality.STREAM_STREAM: 'inline_stream_stream',
}
_CARDINALITY_TO_GENERIC_FUTURE_BEHAVIOR = {
cardinality.Cardinality.UNARY_UNARY: 'future_unary_unary',
cardinality.Cardinality.UNARY_STREAM: 'inline_unary_stream',
cardinality.Cardinality.STREAM_UNARY: 'future_stream_unary',
cardinality.Cardinality.STREAM_STREAM: 'inline_stream_stream',
}
_CARDINALITY_TO_GENERIC_EVENT_BEHAVIOR = {
cardinality.Cardinality.UNARY_UNARY: 'event_unary_unary',
cardinality.Cardinality.UNARY_STREAM: 'event_unary_stream',
cardinality.Cardinality.STREAM_UNARY: 'event_stream_unary',
cardinality.Cardinality.STREAM_STREAM: 'event_stream_stream',
}
_CARDINALITY_TO_MULTI_CALLABLE_ATTRIBUTE = {
cardinality.Cardinality.UNARY_UNARY: 'unary_unary',
cardinality.Cardinality.UNARY_STREAM: 'unary_stream',
cardinality.Cardinality.STREAM_UNARY: 'stream_unary',
cardinality.Cardinality.STREAM_STREAM: 'stream_stream',
}
class Invoker(six.with_metaclass(abc.ABCMeta)):
"""A type used to invoke test RPCs."""
@abc.abstractmethod
def blocking(self, group, name):
"""Invokes an RPC with blocking control flow."""
raise NotImplementedError()
@abc.abstractmethod
def future(self, group, name):
"""Invokes an RPC with future control flow."""
raise NotImplementedError()
@abc.abstractmethod
def event(self, group, name):
"""Invokes an RPC with event control flow."""
raise NotImplementedError()
class InvokerConstructor(six.with_metaclass(abc.ABCMeta)):
"""A type used to create Invokers."""
@abc.abstractmethod
def name(self):
"""Specifies the name of the Invoker constructed by this object."""
raise NotImplementedError()
@abc.abstractmethod
def construct_invoker(self, generic_stub, dynamic_stubs, methods):
"""Constructs an Invoker for the given stubs and methods."""
raise NotImplementedError()
class _GenericInvoker(Invoker):
def __init__(self, generic_stub, methods):
self._stub = generic_stub
self._methods = methods
def _behavior(self, group, name, cardinality_to_generic_method):
method_cardinality = self._methods[group, name].cardinality()
behavior = getattr(self._stub,
cardinality_to_generic_method[method_cardinality])
return lambda *args, **kwargs: behavior(group, name, *args, **kwargs)
def blocking(self, group, name):
return self._behavior(group, name,
_CARDINALITY_TO_GENERIC_BLOCKING_BEHAVIOR)
def future(self, group, name):
return self._behavior(group, name,
_CARDINALITY_TO_GENERIC_FUTURE_BEHAVIOR)
def event(self, group, name):
return self._behavior(group, name,
_CARDINALITY_TO_GENERIC_EVENT_BEHAVIOR)
class _GenericInvokerConstructor(InvokerConstructor):
def name(self):
return 'GenericInvoker'
def construct_invoker(self, generic_stub, dynamic_stub, methods):
return _GenericInvoker(generic_stub, methods)
class _MultiCallableInvoker(Invoker):
def __init__(self, generic_stub, methods):
self._stub = generic_stub
self._methods = methods
def _multi_callable(self, group, name):
method_cardinality = self._methods[group, name].cardinality()
behavior = getattr(
self._stub,
_CARDINALITY_TO_MULTI_CALLABLE_ATTRIBUTE[method_cardinality])
return behavior(group, name)
def blocking(self, group, name):
return self._multi_callable(group, name)
def future(self, group, name):
method_cardinality = self._methods[group, name].cardinality()
behavior = getattr(
self._stub,
_CARDINALITY_TO_MULTI_CALLABLE_ATTRIBUTE[method_cardinality])
if method_cardinality in (cardinality.Cardinality.UNARY_UNARY,
cardinality.Cardinality.STREAM_UNARY):
return behavior(group, name).future
else:
return behavior(group, name)
def event(self, group, name):
return self._multi_callable(group, name).event
class _MultiCallableInvokerConstructor(InvokerConstructor):
def name(self):
return 'MultiCallableInvoker'
def construct_invoker(self, generic_stub, dynamic_stub, methods):
return _MultiCallableInvoker(generic_stub, methods)
class _DynamicInvoker(Invoker):
def __init__(self, dynamic_stubs, methods):
self._stubs = dynamic_stubs
self._methods = methods
def blocking(self, group, name):
return getattr(self._stubs[group], name)
def future(self, group, name):
if self._methods[group, name].cardinality() in (
cardinality.Cardinality.UNARY_UNARY,
cardinality.Cardinality.STREAM_UNARY):
return getattr(self._stubs[group], name).future
else:
return getattr(self._stubs[group], name)
def event(self, group, name):
return getattr(self._stubs[group], name).event
class _DynamicInvokerConstructor(InvokerConstructor):
def name(self):
return 'DynamicInvoker'
def construct_invoker(self, generic_stub, dynamic_stubs, methods):
return _DynamicInvoker(dynamic_stubs, methods)
def invoker_constructors():
"""Creates a sequence of InvokerConstructors to use in tests of RPCs.
Returns:
A sequence of InvokerConstructors.
"""
return (_GenericInvokerConstructor(), _MultiCallableInvokerConstructor(),
_DynamicInvokerConstructor(),)
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