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
184
185
186
187
188
189
190
191
192
|
"""Creates a simple service on top of gRPC for testing."""
from builtins import input, range
import grpc
from grpc.framework.foundation import logging_pool
from grpc_opentracing import grpcext
_SERIALIZE_REQUEST = lambda bytestring: bytestring
_DESERIALIZE_REQUEST = lambda bytestring: bytestring
_SERIALIZE_RESPONSE = lambda bytestring: bytestring
_DESERIALIZE_RESPONSE = lambda bytestring: bytestring
_UNARY_UNARY = '/test/UnaryUnary'
_UNARY_STREAM = '/test/UnaryStream'
_STREAM_UNARY = '/test/StreamUnary'
_STREAM_STREAM = '/test/StreamStream'
_STREAM_LENGTH = 5
class _MethodHandler(grpc.RpcMethodHandler):
def __init__(self,
request_streaming=False,
response_streaming=False,
unary_unary=None,
unary_stream=None,
stream_unary=None,
stream_stream=None):
self.request_streaming = request_streaming
self.response_streaming = response_streaming
self.request_deserializer = _DESERIALIZE_REQUEST
self.response_serializer = _SERIALIZE_RESPONSE
self.unary_unary = unary_unary
self.unary_stream = unary_stream
self.stream_unary = stream_unary
self.stream_stream = stream_stream
class Handler(object):
def __init__(self):
self.invocation_metadata = None
self.trailing_metadata = None
def handle_unary_unary(self, request, servicer_context):
if servicer_context is not None:
self.invocation_metadata = servicer_context.invocation_metadata()
if self.trailing_metadata is not None:
servicer_context.set_trailing_metadata(self.trailing_metadata)
return request
def handle_unary_stream(self, request, servicer_context):
if servicer_context is not None:
self.invocation_metadata = servicer_context.invocation_metadata()
if self.trailing_metadata is not None:
servicer_context.set_trailing_metadata(self.trailing_metadata)
for _ in range(_STREAM_LENGTH):
yield request
def handle_stream_unary(self, request_iterator, servicer_context):
if servicer_context is not None:
self.invocation_metadata = servicer_context.invocation_metadata()
if self.trailing_metadata is not None:
servicer_context.set_trailing_metadata(self.trailing_metadata)
return b''.join(list(request_iterator))
def handle_stream_stream(self, request_iterator, servicer_context):
if servicer_context is not None:
self.invocation_metadata = servicer_context.invocation_metadata()
if self.trailing_metadata is not None:
servicer_context.set_trailing_metadata(self.trailing_metadata)
for request in request_iterator:
yield request
def _set_error_code(servicer_context):
servicer_context.set_code(grpc.StatusCode.INVALID_ARGUMENT)
servicer_context.set_details('ErroringHandler')
class ErroringHandler(Handler):
def __init__(self):
super(ErroringHandler, self).__init__()
def handle_unary_unary(self, request, servicer_context):
_set_error_code(servicer_context)
return super(ErroringHandler, self).handle_unary_unary(request,
servicer_context)
def handle_unary_stream(self, request, servicer_context):
_set_error_code(servicer_context)
return super(ErroringHandler, self).handle_unary_stream(
request, servicer_context)
def handle_stream_unary(self, request_iterator, servicer_context):
_set_error_code(servicer_context)
return super(ErroringHandler, self).handle_stream_unary(
request_iterator, servicer_context)
def handle_stream_stream(self, request_iterator, servicer_context):
_set_error_code(servicer_context)
return super(ErroringHandler, self).handle_stream_stream(
request_iterator, servicer_context)
class ExceptionErroringHandler(Handler):
def __init__(self):
super(ExceptionErroringHandler, self).__init__()
def handle_unary_unary(self, request, servicer_context):
raise IndexError()
def handle_unary_stream(self, request, servicer_context):
raise IndexError()
def handle_stream_unary(self, request_iterator, servicer_context):
raise IndexError()
def handle_stream_stream(self, request_iterator, servicer_context):
raise IndexError()
class _GenericHandler(grpc.GenericRpcHandler):
def __init__(self, handler):
self._handler = handler
def service(self, handler_call_details):
method = handler_call_details.method
if method == _UNARY_UNARY:
return _MethodHandler(unary_unary=self._handler.handle_unary_unary)
elif method == _UNARY_STREAM:
return _MethodHandler(
response_streaming=True,
unary_stream=self._handler.handle_unary_stream)
elif method == _STREAM_UNARY:
return _MethodHandler(
request_streaming=True,
stream_unary=self._handler.handle_stream_unary)
elif method == _STREAM_STREAM:
return _MethodHandler(
request_streaming=True,
response_streaming=True,
stream_stream=self._handler.handle_stream_stream)
else:
return None
class Service(object):
def __init__(self,
client_interceptors,
server_interceptors,
handler=Handler()):
self.handler = handler
self._server_pool = logging_pool.pool(2)
self._server = grpcext.intercept_server(
grpc.server(self._server_pool), *server_interceptors)
port = self._server.add_insecure_port('[::]:0')
self._server.add_generic_rpc_handlers((_GenericHandler(self.handler),))
self._server.start()
self.channel = grpcext.intercept_channel(
grpc.insecure_channel('localhost:%d' % port), *client_interceptors)
@property
def unary_unary_multi_callable(self):
return self.channel.unary_unary(_UNARY_UNARY)
@property
def unary_stream_multi_callable(self):
return self.channel.unary_stream(
_UNARY_STREAM,
request_serializer=_SERIALIZE_REQUEST,
response_deserializer=_DESERIALIZE_RESPONSE)
@property
def stream_unary_multi_callable(self):
return self.channel.stream_unary(
_STREAM_UNARY,
request_serializer=_SERIALIZE_REQUEST,
response_deserializer=_DESERIALIZE_RESPONSE)
@property
def stream_stream_multi_callable(self):
return self.channel.stream_stream(
_STREAM_STREAM,
request_serializer=_SERIALIZE_REQUEST,
response_deserializer=_DESERIALIZE_RESPONSE)
|
