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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*
*
* 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.
*
*/
#ifndef GRPCXX_IMPL_CODEGEN_SERVER_INTERFACE_H
#define GRPCXX_IMPL_CODEGEN_SERVER_INTERFACE_H
#include <grpc++/impl/codegen/call_hook.h>
#include <grpc++/impl/codegen/completion_queue_tag.h>
#include <grpc++/impl/codegen/core_codegen_interface.h>
#include <grpc++/impl/codegen/rpc_service_method.h>
#include <grpc/impl/codegen/grpc_types.h>
namespace grpc {
class AsyncGenericService;
class GenericServerContext;
class RpcService;
class ServerAsyncStreamingInterface;
class ServerCompletionQueue;
class ServerContext;
class ServerCredentials;
class Service;
class ThreadPoolInterface;
/// Models a gRPC server.
///
/// Servers are configured and started via \a grpc::ServerBuilder.
class ServerInterface : public CallHook {
public:
virtual ~ServerInterface() {}
/// Shutdown the server, blocking until all rpc processing finishes.
/// Forcefully terminate pending calls after \a deadline expires.
///
/// \param deadline How long to wait until pending rpcs are forcefully
/// terminated.
template <class T>
void Shutdown(const T& deadline) {
ShutdownInternal(TimePoint<T>(deadline).raw_time());
}
/// Shutdown the server, waiting for all rpc processing to finish.
void Shutdown() { ShutdownInternal(gpr_inf_future(GPR_CLOCK_MONOTONIC)); }
/// Block waiting for all work to complete.
///
/// \warning The server must be either shutting down or some other thread must
/// call \a Shutdown for this function to ever return.
virtual void Wait() = 0;
protected:
friend class Service;
/// Register a service. This call does not take ownership of the service.
/// The service must exist for the lifetime of the Server instance.
virtual bool RegisterService(const grpc::string* host, Service* service) = 0;
/// Register a generic service. This call does not take ownership of the
/// service. The service must exist for the lifetime of the Server instance.
virtual void RegisterAsyncGenericService(AsyncGenericService* service) = 0;
/// Tries to bind \a server to the given \a addr.
///
/// It can be invoked multiple times.
///
/// \param addr The address to try to bind to the server (eg, localhost:1234,
/// 192.168.1.1:31416, [::1]:27182, etc.).
/// \params creds The credentials associated with the server.
///
/// \return bound port number on sucess, 0 on failure.
///
/// \warning It's an error to call this method on an already started server.
virtual int AddListeningPort(const grpc::string& addr,
ServerCredentials* creds) = 0;
/// Start the server.
///
/// \param cqs Completion queues for handling asynchronous services. The
/// caller is required to keep all completion queues live until the server is
/// destroyed.
/// \param num_cqs How many completion queues does \a cqs hold.
///
/// \return true on a successful shutdown.
virtual bool Start(ServerCompletionQueue** cqs, size_t num_cqs) = 0;
/// Process one or more incoming calls.
virtual void RunRpc() = 0;
/// Schedule \a RunRpc to run in the threadpool.
virtual void ScheduleCallback() = 0;
virtual void ShutdownInternal(gpr_timespec deadline) = 0;
virtual int max_message_size() const = 0;
virtual grpc_server* server() = 0;
virtual void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) = 0;
class BaseAsyncRequest : public CompletionQueueTag {
public:
BaseAsyncRequest(ServerInterface* server, ServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq, void* tag,
bool delete_on_finalize);
virtual ~BaseAsyncRequest() {}
bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
protected:
ServerInterface* const server_;
ServerContext* const context_;
ServerAsyncStreamingInterface* const stream_;
CompletionQueue* const call_cq_;
void* const tag_;
const bool delete_on_finalize_;
grpc_call* call_;
grpc_metadata_array initial_metadata_array_;
};
class RegisteredAsyncRequest : public BaseAsyncRequest {
public:
RegisteredAsyncRequest(ServerInterface* server, ServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq, void* tag);
// uses BaseAsyncRequest::FinalizeResult
protected:
void IssueRequest(void* registered_method, grpc_byte_buffer** payload,
ServerCompletionQueue* notification_cq);
};
class NoPayloadAsyncRequest GRPC_FINAL : public RegisteredAsyncRequest {
public:
NoPayloadAsyncRequest(void* registered_method, ServerInterface* server,
ServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq,
ServerCompletionQueue* notification_cq, void* tag)
: RegisteredAsyncRequest(server, context, stream, call_cq, tag) {
IssueRequest(registered_method, nullptr, notification_cq);
}
// uses RegisteredAsyncRequest::FinalizeResult
};
template <class Message>
class PayloadAsyncRequest GRPC_FINAL : public RegisteredAsyncRequest {
public:
PayloadAsyncRequest(void* registered_method, ServerInterface* server,
ServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq,
ServerCompletionQueue* notification_cq, void* tag,
Message* request)
: RegisteredAsyncRequest(server, context, stream, call_cq, tag),
request_(request) {
IssueRequest(registered_method, &payload_, notification_cq);
}
bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
bool serialization_status =
*status && payload_ &&
SerializationTraits<Message>::Deserialize(payload_, request_,
server_->max_message_size())
.ok();
bool ret = RegisteredAsyncRequest::FinalizeResult(tag, status);
*status = serialization_status && *status;
return ret;
}
private:
grpc_byte_buffer* payload_;
Message* const request_;
};
class GenericAsyncRequest : public BaseAsyncRequest {
public:
GenericAsyncRequest(ServerInterface* server, GenericServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq,
ServerCompletionQueue* notification_cq, void* tag,
bool delete_on_finalize);
bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
private:
grpc_call_details call_details_;
};
template <class Message>
void RequestAsyncCall(RpcServiceMethod* method, ServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq,
ServerCompletionQueue* notification_cq, void* tag,
Message* message) {
GPR_CODEGEN_ASSERT(method);
new PayloadAsyncRequest<Message>(method->server_tag(), this, context,
stream, call_cq, notification_cq, tag,
message);
}
void RequestAsyncCall(RpcServiceMethod* method, ServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq,
ServerCompletionQueue* notification_cq, void* tag) {
GPR_CODEGEN_ASSERT(method);
new NoPayloadAsyncRequest(method->server_tag(), this, context, stream,
call_cq, notification_cq, tag);
}
void RequestAsyncGenericCall(GenericServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* call_cq,
ServerCompletionQueue* notification_cq,
void* tag) {
new GenericAsyncRequest(this, context, stream, call_cq, notification_cq,
tag, true);
}
};
} // namespace grpc
#endif // GRPCXX_IMPL_CODEGEN_SERVER_INTERFACE_H
|