1 /*
2 * Copyright 2019 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "grpc/grpc_module.h"
18
19 #include <bluetooth/log.h>
20
21 using ::grpc::Server;
22 using ::grpc::ServerBuilder;
23
24 namespace bluetooth {
25 namespace grpc {
26
ListDependencies(ModuleList *) const27 void GrpcModule::ListDependencies(ModuleList* /* list */) const {}
28
Start()29 void GrpcModule::Start() { log::assert_that(!started_, "assert failed: !started_"); }
30
Stop()31 void GrpcModule::Stop() { log::assert_that(!started_, "assert failed: !started_"); }
32
StartServer(const std::string & address,int port)33 void GrpcModule::StartServer(const std::string& address, int port) {
34 log::assert_that(!started_, "assert failed: !started_");
35 started_ = true;
36
37 std::string listening_port = address + ":" + std::to_string(port);
38 ServerBuilder builder;
39
40 for (const auto& facade : facades_) {
41 builder.RegisterService(facade->GetService());
42 }
43
44 builder.AddListeningPort(listening_port, ::grpc::InsecureServerCredentials());
45 completion_queue_ = builder.AddCompletionQueue();
46 server_ = builder.BuildAndStart();
47 log::assert_that(server_ != nullptr, "assert failed: server_ != nullptr");
48 log::info("gRPC server started on {}", listening_port);
49
50 for (const auto& facade : facades_) {
51 facade->OnServerStarted();
52 }
53 }
54
StopServer()55 void GrpcModule::StopServer() {
56 log::assert_that(started_, "assert failed: started_");
57
58 server_->Shutdown();
59 completion_queue_->Shutdown();
60
61 for (const auto& facade : facades_) {
62 facade->OnServerStopped();
63 }
64
65 started_ = false;
66 }
67
Register(GrpcFacadeModule * facade)68 void GrpcModule::Register(GrpcFacadeModule* facade) {
69 log::assert_that(!started_, "assert failed: !started_");
70
71 facades_.push_back(facade);
72 }
73
Unregister(GrpcFacadeModule * facade)74 void GrpcModule::Unregister(GrpcFacadeModule* facade) {
75 log::assert_that(!started_, "assert failed: !started_");
76
77 for (auto it = facades_.begin(); it != facades_.end(); it++) {
78 if (*it == facade) {
79 facades_.erase(it);
80 return;
81 }
82 }
83
84 log::fatal("module not found");
85 }
86
RunGrpcLoop()87 void GrpcModule::RunGrpcLoop() {
88 void* tag;
89 bool ok;
90 while (true) {
91 if (!completion_queue_->Next(&tag, &ok)) {
92 log::info("gRPC is shutdown");
93 break;
94 }
95 }
96 }
97
ToString() const98 std::string GrpcModule::ToString() const { return "Grpc Module"; }
99
100 const ::bluetooth::ModuleFactory GrpcModule::Factory =
__anon7d8e599e0102() 101 ::bluetooth::ModuleFactory([]() { return new GrpcModule(); });
102
ListDependencies(ModuleList * list) const103 void GrpcFacadeModule::ListDependencies(ModuleList* list) const { list->add<GrpcModule>(); }
104
Start()105 void GrpcFacadeModule::Start() { GetDependency<GrpcModule>()->Register(this); }
106
Stop()107 void GrpcFacadeModule::Stop() { GetDependency<GrpcModule>()->Unregister(this); }
108
ToString() const109 std::string GrpcFacadeModule::ToString() const { return "Grpc Facade Module"; }
110
111 } // namespace grpc
112 } // namespace bluetooth
113