一、说明

MQTT客户端组件.NET Core版本，基于新生命团队NewLife.MQTT的单例模式封装,支持.net core3,.net6/7

Github地址：https://github.com/zxzyjs/SimpleMQTT.git

Gitee地址：https://gitee.com/zxzyjs/SimpleMQTT.git

二、安装

1.直接下载源码添加到现有项目，添加项目引用

2.nuget直接搜索SimpleMQTT安装

三、注入

默认读取配置文件下的MqttSetting节点,当然也可以自定义节点名

{
    "MqttSetting": {
    "Host": "192.168.1.1",
    "Port": 1883,
    "UserName": "xxx",
    "SecretKey": "xxx",
    "ClientId": "xxx",
  }
}

支持多客户端配置，只需在每个客户端配置上加上Name属性即可

"MqttSetting": [
    {
      "Name": "mqtt1",
      "Host": "127.0.0.1",
      "Port": 1883,
      "UserName": "admin",
      "SecretKey": "admin",
      "ClientId": "admin"
    },
    {
      "Name": "mqtt2",
      "Host": "127.0.0.2",
      "Port": 1883,
      "UserName": "admin",
      "SecretKey": "admin",
      "ClientId": "admin"
    }
  ]

除了上述配置外，还支持其他属性配置

    /// <summary>
    /// mqtt客户端配置
    /// </summary>
    public class MqttClientConfig
    {
        /// <summary>
        /// 客户端名称
        /// </summary>
        public string Name { get; set; } = "Mqtt";

        /// <summary>
        /// 主机地址
        /// </summary>
        public string Host { get; set; }

        /// <summary>
        /// 端口
        /// </summary>
        public int Port { get; set; }


        /// <summary>
        /// 用户名
        /// </summary>
        public string UserName { get; set; }

        /// <summary>
        /// 秘钥
        /// </summary>
        public string SecretKey { get; set; }

        /// <summary>
        /// 客户端ID
        /// </summary>
        public string ClientId { get; set; }

        /// <summary>
        /// 心跳
        /// </summary>
        public int KeepAlive { get; set; } = 60;

        /// <summary>
        /// 是否自动重连,默认True
        /// </summary>
        public bool Reconnect { get; set; } = true;

        /// <summary>
        /// 是否清除会话,默认True
        /// </summary>
        public bool CleanSession { get; set; } = true;

        /// <summary>
        /// 超时。默认15000ms
        /// </summary>
        public int Timeout { get; set; } = 15000;

        /// <summary>
        /// 是否进行SSL连接
        /// </summary>
        public bool UseSSL { get; set; } = false;
    }

以下是注入代码，自行选择注入方式

        /// <summary>
        /// 添加Mqtt客户端服务
        /// </summary>
        /// <param name="services"></param>
        /// <exception cref="ArgumentNullException"></exception>
        public static void AddMqttClientManager(this IServiceCollection services)
        {
            if (services == null) throw new ArgumentNullException(nameof(services));
            services.AddSingleton<IMqttClientManager, MqttClientManager>();
        }

        /// <summary>
        /// 添加Mqtt客户端服务
        /// </summary>
        /// <param name="services"></param>
        /// <param name="configuration">IConfiguration</param>
        /// <param name="section">配置文件节点</param>
        /// <param name="start">立即启动</param>
        /// <exception cref="ArgumentNullException"></exception>
        public static void AddMqttClientManager(this IServiceCollection services, IConfiguration configuration, string section = "MqttSetting", bool start = true)
        {
            if (services == null) throw new ArgumentNullException(nameof(services));
            MqttClientConfig config = new MqttClientConfig();
            configuration.GetSection(section).Bind(config);//获取配置
            services.AddSingleton<IMqttClientManager, MqttClientManager>(x => new MqttClientManager(config, start));
        }

        /// <summary>
        /// 添加Mqtt客户端服务
        /// </summary>
        /// <param name="services"></param>
        /// <param name="config">mqtt配置</param>
        /// <param name="start">立即启动</param>
        /// <exception cref="ArgumentNullException"></exception>
        public static void AddMqttClientManager(this IServiceCollection services, MqttClientConfig config, bool start = true)
        {

            if (services == null) throw new ArgumentNullException(nameof(services));
            services.AddSingleton<IMqttClientManager, MqttClientManager>(x => new MqttClientManager(config, start));
        }

        /// <summary>
        /// 添加Mqtt客户端服务
        /// </summary>
        /// <param name="services"></param>
        /// <param name="configs">mqtt配置</param>
        /// <param name="start">立即启动</param>
        /// <exception cref="ArgumentNullException"></exception>
        public static void AddMqttClientManager(this IServiceCollection services, List<MqttClientConfig> configs, bool start = true)
        {
            if (services == null) throw new ArgumentNullException(nameof(services));
            services.AddSingleton<IMqttClientManager, MqttClientManager>(x => new MqttClientManager(configs, start));
        }
    }

我一般在workerservice项目中使用，所以这么注册就行了

IHost host = Host.CreateDefaultBuilder(args)
    .ConfigureServices((hostContext, services) =>
    {
        services.AddMqttClientManager();//第一种
        //services.AddMqttClientManager(hostContext.Configuration, "xxx");//第二种

    })

四、使用

4.1采用注入的方式(推荐)

直接构造函数注入即可

        private readonly MqttClient mqttClient;
        public Worker(ILogger<Worker> logger, IMqttClientManager mqttClientManager)
        {
            _logger = logger;
            mqttClient = mqttClientManager.GetClient();
        }

如果是多个客户端

        private readonly List<MqttClient> mqttClients;
        public Worker(ILogger<Worker> logger, IMqttClientManager mqttClientManager)
        {
            _logger = logger;
            mqttClients = mqttClientManager.GetClients();
        }

4.2采用New的方式

            MqttClientConfig config = new MqttClientConfig() { Host = "xx", Port = 1883 };
            var mqttManager = new MqttClientManager(config);
            mqttManager.GetClient().Disconnected += (object? sender, EventArgs e) =>
            {
                Console.WriteLine("断开");
            };
            mqttManager.GetClient().Connected += (object? sender, EventArgs e) =>
            {
                Console.WriteLine("连接");
            };
            mqttManager.StartClient();