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
|
/*
*
* 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.
*
*/
#ifndef GRPCPP_IMPL_CODEGEN_ASYNC_GENERIC_SERVICE_H
#define GRPCPP_IMPL_CODEGEN_ASYNC_GENERIC_SERVICE_H
// IWYU pragma: private, include <grpcpp/generic/async_generic_service.h>
#include <grpc/impl/codegen/port_platform.h>
#include <grpcpp/impl/codegen/async_stream.h>
#include <grpcpp/impl/codegen/byte_buffer.h>
#include <grpcpp/impl/codegen/server_callback.h>
#include <grpcpp/impl/codegen/server_callback_handlers.h>
struct grpc_server;
namespace grpc {
typedef ServerAsyncReaderWriter<ByteBuffer, ByteBuffer>
GenericServerAsyncReaderWriter;
typedef ServerAsyncResponseWriter<ByteBuffer> GenericServerAsyncResponseWriter;
typedef ServerAsyncReader<ByteBuffer, ByteBuffer> GenericServerAsyncReader;
typedef ServerAsyncWriter<ByteBuffer> GenericServerAsyncWriter;
class GenericServerContext final : public ServerContext {
public:
const std::string& method() const { return method_; }
const std::string& host() const { return host_; }
private:
friend class ServerInterface;
std::string method_;
std::string host_;
};
// A generic service at the server side accepts all RPC methods and hosts. It is
// typically used in proxies. The generic service can be registered to a server
// which also has other services.
// Sample usage:
// ServerBuilder builder;
// auto cq = builder.AddCompletionQueue();
// AsyncGenericService generic_service;
// builder.RegisterAsyncGenericService(&generic_service);
// auto server = builder.BuildAndStart();
//
// // request a new call
// GenericServerContext context;
// GenericServerAsyncReaderWriter stream;
// generic_service.RequestCall(&context, &stream, cq.get(), cq.get(), tag);
//
// When tag is retrieved from cq->Next(), context.method() can be used to look
// at the method and the RPC can be handled accordingly.
class AsyncGenericService final {
public:
AsyncGenericService() : server_(nullptr) {}
void RequestCall(GenericServerContext* ctx,
GenericServerAsyncReaderWriter* reader_writer,
::grpc::CompletionQueue* call_cq,
::grpc::ServerCompletionQueue* notification_cq, void* tag);
private:
friend class grpc::Server;
grpc::Server* server_;
};
/// \a ServerGenericBidiReactor is the reactor class for bidi streaming RPCs
/// invoked on a CallbackGenericService. It is just a ServerBidi reactor with
/// ByteBuffer arguments.
using ServerGenericBidiReactor = ServerBidiReactor<ByteBuffer, ByteBuffer>;
class GenericCallbackServerContext final : public grpc::CallbackServerContext {
public:
const std::string& method() const { return method_; }
const std::string& host() const { return host_; }
private:
friend class ::grpc::Server;
std::string method_;
std::string host_;
};
/// \a CallbackGenericService is the base class for generic services implemented
/// using the callback API and registered through the ServerBuilder using
/// RegisterCallbackGenericService.
class CallbackGenericService {
public:
CallbackGenericService() {}
virtual ~CallbackGenericService() {}
/// The "method handler" for the generic API. This function should be
/// overridden to provide a ServerGenericBidiReactor that implements the
/// application-level interface for this RPC. Unimplemented by default.
virtual ServerGenericBidiReactor* CreateReactor(
GenericCallbackServerContext* /*ctx*/) {
class Reactor : public ServerGenericBidiReactor {
public:
Reactor() { this->Finish(Status(StatusCode::UNIMPLEMENTED, "")); }
void OnDone() override { delete this; }
};
return new Reactor;
}
private:
friend class grpc::Server;
internal::CallbackBidiHandler<ByteBuffer, ByteBuffer>* Handler() {
return new internal::CallbackBidiHandler<ByteBuffer, ByteBuffer>(
[this](::grpc::CallbackServerContext* ctx) {
return CreateReactor(static_cast<GenericCallbackServerContext*>(ctx));
});
}
grpc::Server* server_{nullptr};
};
} // namespace grpc
#endif // GRPCPP_IMPL_CODEGEN_ASYNC_GENERIC_SERVICE_H
|
