1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
# Copyright 2015-2016, 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.
import abc
import collections
import six
# face_interfaces is referenced from specification in this module.
from grpc.framework.common import cardinality
from grpc.framework.face import interfaces as face_interfaces # pylint: disable=unused-import
from grpc.framework.face import utilities as face_utilities
from grpc.framework.alpha import _reexport
from grpc.framework.alpha import interfaces
def _qualified_name(service_name, method_name):
return '/%s/%s' % (service_name, method_name)
# TODO(nathaniel): This structure is getting bloated; it could be shrunk if
# implementations._Stub used a generic rather than a dynamic underlying
# face-layer stub.
class InvocationBreakdown(six.with_metaclass(abc.ABCMeta)):
"""An intermediate representation of invocation-side views of RPC methods.
Attributes:
cardinalities: A dictionary from RPC method name to interfaces.Cardinality
value.
qualified_names: A dictionary from unqualified RPC method name to
service-qualified RPC method name.
face_cardinalities: A dictionary from service-qualified RPC method name to
to cardinality.Cardinality value.
request_serializers: A dictionary from service-qualified RPC method name to
callable behavior to be used serializing request values for the RPC.
response_deserializers: A dictionary from service-qualified RPC method name
to callable behavior to be used deserializing response values for the
RPC.
"""
class _EasyInvocationBreakdown(
InvocationBreakdown,
collections.namedtuple(
'_EasyInvocationBreakdown',
('cardinalities', 'qualified_names', 'face_cardinalities',
'request_serializers', 'response_deserializers'))):
pass
class ServiceBreakdown(six.with_metaclass(abc.ABCMeta)):
"""An intermediate representation of service-side views of RPC methods.
Attributes:
implementations: A dictionary from service-qualified RPC method name to
face_interfaces.MethodImplementation implementing the RPC method.
request_deserializers: A dictionary from service-qualified RPC method name
to callable behavior to be used deserializing request values for the RPC.
response_serializers: A dictionary from service-qualified RPC method name
to callable behavior to be used serializing response values for the RPC.
"""
class _EasyServiceBreakdown(
ServiceBreakdown,
collections.namedtuple(
'_EasyServiceBreakdown',
('implementations', 'request_deserializers', 'response_serializers'))):
pass
def break_down_invocation(service_name, method_descriptions):
"""Derives an InvocationBreakdown from several RPC method descriptions.
Args:
service_name: The package-qualified full name of the service.
method_descriptions: A dictionary from RPC method name to
interfaces.RpcMethodInvocationDescription describing the RPCs.
Returns:
An InvocationBreakdown corresponding to the given method descriptions.
"""
cardinalities = {}
qualified_names = {}
face_cardinalities = {}
request_serializers = {}
response_deserializers = {}
for name, method_description in six.iteritems(method_descriptions):
qualified_name = _qualified_name(service_name, name)
method_cardinality = method_description.cardinality()
cardinalities[name] = method_description.cardinality()
qualified_names[name] = qualified_name
face_cardinalities[qualified_name] = _reexport.common_cardinality(
method_cardinality)
request_serializers[qualified_name] = method_description.serialize_request
response_deserializers[qualified_name] = (
method_description.deserialize_response)
return _EasyInvocationBreakdown(
cardinalities, qualified_names, face_cardinalities, request_serializers,
response_deserializers)
def break_down_service(service_name, method_descriptions):
"""Derives a ServiceBreakdown from several RPC method descriptions.
Args:
method_descriptions: A dictionary from RPC method name to
interfaces.RpcMethodServiceDescription describing the RPCs.
Returns:
A ServiceBreakdown corresponding to the given method descriptions.
"""
implementations = {}
request_deserializers = {}
response_serializers = {}
for name, method_description in six.iteritems(method_descriptions):
qualified_name = _qualified_name(service_name, name)
method_cardinality = method_description.cardinality()
if method_cardinality is interfaces.Cardinality.UNARY_UNARY:
def service(
request, face_rpc_context,
service_behavior=method_description.service_unary_unary):
return service_behavior(
request, _reexport.rpc_context(face_rpc_context))
implementations[qualified_name] = face_utilities.unary_unary_inline(
service)
elif method_cardinality is interfaces.Cardinality.UNARY_STREAM:
def service(
request, face_rpc_context,
service_behavior=method_description.service_unary_stream):
return service_behavior(
request, _reexport.rpc_context(face_rpc_context))
implementations[qualified_name] = face_utilities.unary_stream_inline(
service)
elif method_cardinality is interfaces.Cardinality.STREAM_UNARY:
def service(
request_iterator, face_rpc_context,
service_behavior=method_description.service_stream_unary):
return service_behavior(
request_iterator, _reexport.rpc_context(face_rpc_context))
implementations[qualified_name] = face_utilities.stream_unary_inline(
service)
elif method_cardinality is interfaces.Cardinality.STREAM_STREAM:
def service(
request_iterator, face_rpc_context,
service_behavior=method_description.service_stream_stream):
return service_behavior(
request_iterator, _reexport.rpc_context(face_rpc_context))
implementations[qualified_name] = face_utilities.stream_stream_inline(
service)
request_deserializers[qualified_name] = (
method_description.deserialize_request)
response_serializers[qualified_name] = (
method_description.serialize_response)
return _EasyServiceBreakdown(
implementations, request_deserializers, response_serializers)
|
