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
|
# 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.
cimport cpython
import time
cdef class Server:
def __cinit__(self, ChannelArgs arguments):
grpc_init()
cdef grpc_channel_args *c_arguments = NULL
self.references = []
self.registered_completion_queues = []
if len(arguments) > 0:
c_arguments = &arguments.c_args
self.references.append(arguments)
with nogil:
self.c_server = grpc_server_create(c_arguments, NULL)
self.is_started = False
self.is_shutting_down = False
self.is_shutdown = False
def request_call(
self, CompletionQueue call_queue not None,
CompletionQueue server_queue not None, tag):
if not self.is_started or self.is_shutting_down:
raise ValueError("server must be started and not shutting down")
if server_queue not in self.registered_completion_queues:
raise ValueError("server_queue must be a registered completion queue")
cdef grpc_call_error result
cdef OperationTag operation_tag = OperationTag(tag)
operation_tag.operation_call = Call()
operation_tag.request_call_details = CallDetails()
operation_tag.request_metadata = Metadata([])
operation_tag.references.extend([self, call_queue, server_queue])
operation_tag.is_new_request = True
operation_tag.batch_operations = Operations([])
cpython.Py_INCREF(operation_tag)
with nogil:
result = grpc_server_request_call(
self.c_server, &operation_tag.operation_call.c_call,
&operation_tag.request_call_details.c_details,
&operation_tag.request_metadata.c_metadata_array,
call_queue.c_completion_queue, server_queue.c_completion_queue,
<cpython.PyObject *>operation_tag)
return result
def register_completion_queue(
self, CompletionQueue queue not None):
if self.is_started:
raise ValueError("cannot register completion queues after start")
with nogil:
grpc_server_register_completion_queue(
self.c_server, queue.c_completion_queue, NULL)
self.registered_completion_queues.append(queue)
def start(self):
if self.is_started:
raise ValueError("the server has already started")
self.backup_shutdown_queue = CompletionQueue(shutdown_cq=True)
self.register_completion_queue(self.backup_shutdown_queue)
self.is_started = True
with nogil:
grpc_server_start(self.c_server)
# Ensure the core has gotten a chance to do the start-up work
self.backup_shutdown_queue.poll(Timespec(None))
def add_http2_port(self, bytes address,
ServerCredentials server_credentials=None):
address = str_to_bytes(address)
self.references.append(address)
cdef int result
cdef char *address_c_string = address
if server_credentials is not None:
self.references.append(server_credentials)
with nogil:
result = grpc_server_add_secure_http2_port(
self.c_server, address_c_string, server_credentials.c_credentials)
else:
with nogil:
result = grpc_server_add_insecure_http2_port(self.c_server,
address_c_string)
return result
cdef _c_shutdown(self, CompletionQueue queue, tag):
self.is_shutting_down = True
operation_tag = OperationTag(tag)
operation_tag.shutting_down_server = self
cpython.Py_INCREF(operation_tag)
with nogil:
grpc_server_shutdown_and_notify(
self.c_server, queue.c_completion_queue,
<cpython.PyObject *>operation_tag)
def shutdown(self, CompletionQueue queue not None, tag):
cdef OperationTag operation_tag
if queue.is_shutting_down:
raise ValueError("queue must be live")
elif not self.is_started:
raise ValueError("the server hasn't started yet")
elif self.is_shutting_down:
return
elif queue not in self.registered_completion_queues:
raise ValueError("expected registered completion queue")
else:
self._c_shutdown(queue, tag)
cdef notify_shutdown_complete(self):
# called only by a completion queue on receiving our shutdown operation tag
self.is_shutdown = True
def cancel_all_calls(self):
if not self.is_shutting_down:
raise RuntimeError("the server must be shutting down to cancel all calls")
elif self.is_shutdown:
return
else:
with nogil:
grpc_server_cancel_all_calls(self.c_server)
def __dealloc__(self):
if self.c_server != NULL:
if not self.is_started:
pass
elif self.is_shutdown:
pass
elif not self.is_shutting_down:
# the user didn't call shutdown - use our backup queue
self._c_shutdown(self.backup_shutdown_queue, None)
# and now we wait
while not self.is_shutdown:
self.backup_shutdown_queue.poll()
else:
# We're in the process of shutting down, but have not shutdown; can't do
# much but repeatedly release the GIL and wait
while not self.is_shutdown:
time.sleep(0)
grpc_server_destroy(self.c_server)
grpc_shutdown()
|