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 ::grpc::Status GetAllPropertyConfig( 45 ::grpc::ServerContext* context, const ::google::protobuf::Empty* request, 46 ::grpc::ServerWriter<proto::VehiclePropConfig>* stream) override; 47 48 ::grpc::Status SetValues(::grpc::ServerContext* context, 49 const proto::VehiclePropValueRequests* requests, 50 proto::SetValueResults* results) override; 51 52 ::grpc::Status GetValues(::grpc::ServerContext* context, 53 const proto::VehiclePropValueRequests* requests, 54 proto::GetValueResults* results) override; 55 56 ::grpc::Status UpdateSampleRate(::grpc::ServerContext* context, 57 const proto::UpdateSampleRateRequest* request, 58 proto::VehicleHalCallStatus* status) override; 59 60 ::grpc::Status Subscribe(::grpc::ServerContext* context, const proto::SubscribeRequest* request, 61 proto::VehicleHalCallStatus* status) override; 62 63 ::grpc::Status Unsubscribe(::grpc::ServerContext* context, 64 const proto::UnsubscribeRequest* request, 65 proto::VehicleHalCallStatus* status) override; 66 67 ::grpc::Status CheckHealth(::grpc::ServerContext* context, const ::google::protobuf::Empty*, 68 proto::VehicleHalCallStatus* status) override; 69 70 ::grpc::Status Dump(::grpc::ServerContext* context, const proto::DumpOptions* options, 71 proto::DumpResult* result) override; 72 73 ::grpc::Status StartPropertyValuesStream( 74 ::grpc::ServerContext* context, const ::google::protobuf::Empty* request, 75 ::grpc::ServerWriter<proto::VehiclePropValues>* stream) override; 76 77 GrpcVehicleProxyServer& Start(); 78 79 GrpcVehicleProxyServer& Shutdown(); 80 81 void Wait(); 82 83 private: 84 void OnVehiclePropChange(const std::vector<aidlvhal::VehiclePropValue>& values); 85 86 // We keep long-lasting connection for streaming the prop values. 87 struct ConnectionDescriptor { ConnectionDescriptorConnectionDescriptor88 explicit ConnectionDescriptor(::grpc::ServerWriter<proto::VehiclePropValues>* stream) 89 : mStream(stream), 90 mConnectionID(connection_id_counter_.fetch_add(1) + 1), 91 mMtx(std::make_unique<std::mutex>()), 92 mCV(std::make_unique<std::condition_variable>()) {} 93 94 ConnectionDescriptor(const ConnectionDescriptor&) = delete; 95 ConnectionDescriptor(ConnectionDescriptor&& cd) = default; 96 ConnectionDescriptor& operator=(const ConnectionDescriptor&) = delete; 97 ConnectionDescriptor& operator=(ConnectionDescriptor&& cd) = default; 98 99 ~ConnectionDescriptor(); 100 IDConnectionDescriptor101 uint64_t ID() const { return mConnectionID; } 102 103 bool Write(const proto::VehiclePropValues& values); 104 105 void Wait(); 106 107 void Shutdown(); 108 109 private: 110 ::grpc::ServerWriter<proto::VehiclePropValues>* mStream; 111 uint64_t mConnectionID{0}; 112 std::unique_ptr<std::mutex> mMtx; 113 std::unique_ptr<std::condition_variable> mCV; 114 bool mShutdownFlag{false}; 115 116 static std::atomic<uint64_t> connection_id_counter_; 117 }; 118 119 std::string mServiceAddr; 120 std::unique_ptr<::grpc::Server> mServer{nullptr}; 121 std::unique_ptr<IVehicleHardware> mHardware; 122 123 std::shared_mutex mConnectionMutex; 124 std::vector<std::shared_ptr<ConnectionDescriptor>> mValueStreamingConnections; 125 126 static constexpr auto kHardwareOpTimeout = std::chrono::seconds(1); 127 }; 128 129 } // namespace android::hardware::automotive::vehicle::virtualization 130