LASAPlatform/OpenAuth.WebApi/Model/mqtt/MqttHostedService.cs

using Infrastructure.CloudSdk.mqttmessagecenter;
using NPOI.SS.Formula.Functions;
using NuGet.Packaging;
using OpenAuth.App.ServiceApp;
using System.Security.Cryptography;

namespace OpenAuth.WebApi.Model.mqtt
{
    public class MqttHostedService : IHostedService
    {
        private readonly IServiceProvider _serviceProvider;
        private readonly MqttMessageCenter _mqttCenter;
        private readonly AirportMaintenanceApp _app;


        public MqttHostedService(IServiceProvider serviceProvider, MqttMessageCenter mqttCenter, AirportMaintenanceApp app)
        {
            _serviceProvider = serviceProvider;
            _mqttCenter = mqttCenter;
            _app = app;
        }

        public async Task StartAsync(CancellationToken cancellationToken)
        {
            using var scope = _serviceProvider.CreateScope();
            var handlers = scope.ServiceProvider.GetServices<IMqttMessageHandler>();
            // 创建配置构建器
            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
                .AddJsonFile(
                    $"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Development"}.json",
                    optional: true)
                .AddEnvironmentVariables();
            // 构建配置
            var configuration = builder.Build();
            // 读取连接字符串
            var serverIp = configuration["MQTT:Server"];
            var port = configuration["MQTT:Port"];
            var username = configuration["MQTT:UserName"];
            var password = configuration["MQTT:Password"];

            await _mqttCenter.InitializeAsync(
                handlers,
                server: serverIp,
                port: int.Parse(port),
                clientId: Guid.NewGuid().ToString(),
                username: username,
                password: password
            );
            string[] topicList =
                {
                "thing/product/+/services_reply",
                "thing/product/+/events",
                "thing/product/+/requests",
                "thing/product/+/osd",
                "sys/product/+/status",
                "thing/product/+/control-operation"
            };
            await _mqttCenter.SubscribeAsync(topicList);
        }

        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
    }
}