1 /* 2 * Copyright (C) 2023 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 #pragma once 18 19 #include "IVehicleHardware.h" 20 21 #include "VehicleServer.grpc.pb.h" 22 #include "VehicleServer.pb.h" 23 24 #include <grpc++/grpc++.h> 25 26 #include <atomic> 27 #include <chrono> 28 #include <cstdint> 29 #include <functional> 30 #include <memory> 31 #include <shared_mutex> 32 #include <string> 33 #include <utility> 34 35 namespace android::hardware::automotive::vehicle::virtualization { 36 37 namespace aidlvhal = ::aidl::android::hardware::automotive::vehicle; 38 39 // Connect other GRPC vehicle hardware(s) to the underlying vehicle hardware. 40 class GrpcVehicleProxyServer : public proto::VehicleServer::Service { 41 public: 42 GrpcVehicleProxyServer(std::string serverAddr, std::unique_ptr<IVehicleHardware>&& hardware); 43 44 GrpcVehicleProxyServer(std::vector<std::string> serverAddrs, 45 std::unique_ptr<IVehicleHardware>&& hardware); 46 47 ::grpc::Status GetAllPropertyConfig( 48 ::grpc::ServerContext* context, const ::google::protobuf::Empty* request, 49 ::grpc::ServerWriter<proto::VehiclePropConfig>* stream) override; 50 51 ::grpc::Status SetValues(::grpc::ServerContext* context, 52 const proto::VehiclePropValueRequests* requests, 53 proto::SetValueResults* results) override; 54 55 ::grpc::Status GetValues(::grpc::ServerContext* context, 56 const proto::VehiclePropValueRequests* requests, 57 proto::GetValueResults* results) override; 58 59 ::grpc::Status UpdateSampleRate(::grpc::ServerContext* context, 60 const proto::UpdateSampleRateRequest* request, 61 proto::VehicleHalCallStatus* status) override; 62 63 ::grpc::Status Subscribe(::grpc::ServerContext* context, const proto::SubscribeRequest* request, 64 proto::VehicleHalCallStatus* status) override; 65 66 ::grpc::Status Unsubscribe(::grpc::ServerContext* context, 67 const proto::UnsubscribeRequest* request, 68 proto::VehicleHalCallStatus* status) override; 69 70 ::grpc::Status CheckHealth(::grpc::ServerContext* context, const ::google::protobuf::Empty*, 71 proto::VehicleHalCallStatus* status) override; 72 73 ::grpc::Status Dump(::grpc::ServerContext* context, const proto::DumpOptions* options, 74 proto::DumpResult* result) override; 75 76 ::grpc::Status StartPropertyValuesStream( 77 ::grpc::ServerContext* context, const ::google::protobuf::Empty* request, 78 ::grpc::ServerWriter<proto::VehiclePropValues>* stream) override; 79 80 GrpcVehicleProxyServer& Start(); 81 82 GrpcVehicleProxyServer& Shutdown(); 83 84 void Wait(); 85 86 private: 87 void OnVehiclePropChange(const std::vector<aidlvhal::VehiclePropValue>& values); 88 89 // We keep long-lasting connection for streaming the prop values. 90 struct ConnectionDescriptor { ConnectionDescriptorConnectionDescriptor91 explicit ConnectionDescriptor(::grpc::ServerWriter<proto::VehiclePropValues>* stream) 92 : mStream(stream), 93 mConnectionID(connection_id_counter_.fetch_add(1) + 1), 94 mMtx(std::make_unique<std::mutex>()), 95 mCV(std::make_unique<std::condition_variable>()) {} 96 97 ConnectionDescriptor(const ConnectionDescriptor&) = delete; 98 ConnectionDescriptor(ConnectionDescriptor&& cd) = default; 99 ConnectionDescriptor& operator=(const ConnectionDescriptor&) = delete; 100 ConnectionDescriptor& operator=(ConnectionDescriptor&& cd) = default; 101 102 ~ConnectionDescriptor(); 103 IDConnectionDescriptor104 uint64_t ID() const { return mConnectionID; } 105 106 bool Write(const proto::VehiclePropValues& values); 107 108 void Wait(); 109 110 void Shutdown(); 111 112 private: 113 ::grpc::ServerWriter<proto::VehiclePropValues>* mStream; 114 uint64_t mConnectionID{0}; 115 std::unique_ptr<std::mutex> mMtx; 116 std::unique_ptr<std::condition_variable> mCV; 117 bool mShutdownFlag{false}; 118 119 static std::atomic<uint64_t> connection_id_counter_; 120 }; 121 122 std::vector<std::string> mServiceAddrs; 123 std::unique_ptr<::grpc::Server> mServer{nullptr}; 124 std::unique_ptr<IVehicleHardware> mHardware; 125 126 std::shared_mutex mConnectionMutex; 127 std::vector<std::shared_ptr<ConnectionDescriptor>> mValueStreamingConnections; 128 129 static constexpr auto kHardwareOpTimeout = std::chrono::seconds(1); 130 }; 131 132 } // namespace android::hardware::automotive::vehicle::virtualization 133