.net core使用rabbitmq消息队列 (二)

　　之前有写过.net core集成使用rabbitmq的博文，见.net core使用rabbitmq消息队列，但是里面的使用很简单，而且还有几个bug，想改下，但是后来想了想，还是算了，之前使用的是.net core 2.x，还是重新整理一遍吧！

　　由于代码比较多，我把代码传到gitee上了，地址见：https://gitee.com/shanfeng1000/dotnetcore-demo/tree/master/Rabbitmq

　　这是一个Demo项目，介绍.net core集成使用rabbitmq消息队列，使用的.net core 3.1，这里简单介绍：

　　生产者（AspNetCore.WebApi.Producer）

　　在Startup的ConfigureServices方法中添加相关rabbitmq的服务：　　

　　

    public void ConfigureServices(IServiceCollection services)
    {
        string[] hosts = new string[] { "192.168.209.133", "192.168.209.134", "192.168.209.135" };
        int port = 5672;
        string userName = "admin";
        string password = "123456";
        string virtualHost = "/";
        var arguments = new Dictionary<string, object>() { { "x-queue-type", "classic" } };

        #region 日志记录

        services.AddLogging(builder =>
        {
            builder.SetMinimumLevel(LogLevel.Trace);
        });
        services.AddRabbitLogger(options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.Category = "Home";
            options.MinLevel = LogLevel.Trace;
            options.ApplicationName = "AspNetCore.WebApi.Producer";

            //队列模式
            options.Queue = "queue.logger";

            //交换机模式
            //options.Exchange = "exchange.logger"; 
            //options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.logger", Route = "#" } };
            //options.Type = RabbitExchangeType.Topic;
        });

        #endregion

        #region 普通模式

        services.AddRabbitProducer("SimplePattern", options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.InitializeCount = 3;
            options.Queues = new string[] { "queue.simple" };
        });

        #endregion

        #region 工作模式

        services.AddRabbitProducer("WorkerPattern", options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.InitializeCount = 3;
            options.Queues = new string[] { "queue.worker" };
        });

        #endregion

        #region 发布订阅模式 

        services.AddRabbitProducer("FanoutPattern", options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.InitializeCount = 3;
            options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.fanout1" }, new RouteQueue() { Queue = "queue.fanout2" } };
            options.Type = RabbitExchangeType.Fanout;
            options.Exchange = "exchange.fanout";
        });

        #endregion

        #region 路由模式 

        services.AddRabbitProducer("DirectPattern", options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.InitializeCount = 5;
            options.Exchange = "exchange.direct";
            options.Type = RabbitExchangeType.Direct;
            options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.direct1", Route = "direct1" }, new RouteQueue() { Queue = "queue.direct2", Route = "direct2" } };
        });

        #endregion

        #region 主题模式

        services.AddRabbitProducer("TopicPattern", options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.InitializeCount = 5;
            options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.topic1", Route = "topic1.#" }, new RouteQueue() { Queue = "queue.topic2", Route = "topic2.#" } };
            options.Type = RabbitExchangeType.Topic;
            options.Exchange = "exchange.topic";
        });

        #endregion

        ......
    }

　　里面介绍了6中集成方式：

　　使用AddRabbitLogger方法添加日志相关的服务，需要注意的是，数据是以json格式发送到rabbitmq中去的，具体可以参考RabbitLoggerMessage<T>类，最好是自己发布测试就可以了，当然读者可以安装自己的需求修改RabbitLogger类中的发布逻辑。

　　使用AddRabbitProducer方法添加一个发布者，可以指定名称，这个名称是获取发布者对象时使用。这个方法添加的发布者可以满足rabbitmq的五种使用方式（普通模式，工作模式，发布订阅模式，路由模式，主题模式），具体由RabbitProducerOptions配置指定。

　　服务配置好，具体使用可以参考HomeController，日志记录可以注入ILogger<T>对象，或者注入ILoggerFactory对象，然后获取ILogger<T>对象，直接使用ILogger<T>对象的方法就是发布消息了：　　

    /// <summary>
    /// 日志
    /// </summary>
    /// <param name="message"></param>
    /// <returns></returns>
    [HttpGet]
    public string Get(string message)
    {
        logger.LogTrace($"Trace:{message}");
        logger.LogDebug($"Debug:{message}");
        logger.LogInformation($"Information:{message}");
        logger.LogWarning($"Warning:{message}");
        logger.LogError($"Error:{message}");
        logger.LogCritical($"Critical:{message}");

        return "success";

　　至于另外五种模式，我们需要注入IRabbitProducerFactory对象，然后使用Create方法创建指定名称的发布者，然后调用Publish或者PublishAsync方法发布消息，而且他们都有几个重载。

　　需要注意的是，不同类型的生产者应该使用不同的Publish或者PublishAsync方法，比如普通模式和工作模式，因为他们没有路由参数，因此需要使用无路由参数的Publish方法，如：　　

    /// <summary>
    /// Simple
    /// </summary>
    /// <returns></returns>
    [HttpGet("Simple")]
    public string Simple(string message = "Simple")
    {
        var producer = rabbitProducerFactory.Create("SimplePattern");
        producer.Publish(message);

        return "success";
    }
    /// <summary>
    /// Worker
    /// </summary>
    /// <param name="message"></param>
    /// <returns></returns>
    [HttpGet("Worker")]
    public string Worker(string message = "Worker")
    {
        var producer = rabbitProducerFactory.Create("WorkerPattern");
        int count = 10;
        while (count-- > 0)
        {
            producer.Publish(message);
        }

        return "success";
    }

　　而发布订阅模式、路由模式、主题模式都是有路由的（发布订阅模式的路由可以认为是空值），因此需要使用带路由参数的Publish方法：　　

    /// <summary>
    /// Direct
    /// </summary>
    /// <param name="route"></param>
    /// <param name="message"></param>
    /// <returns></returns>
    [HttpGet("Direct")]
    public string Direct(string route = "direct1", string message = "Direct")
    {
        var producer = rabbitProducerFactory.Create("DirectPattern");
        producer.Publish(route, message);

        return "success";
    }
    /// <summary>
    /// Fanout
    /// </summary>
    /// <param name="message"></param>
    /// <returns></returns>
    [HttpGet("Fanout")]
    public string Fanout(string message = "Fanout")
    {
        var producer = rabbitProducerFactory.Create("FanoutPattern");
        producer.Publish("", message);//fanout模式路由为空值

        return "success";
    }
    /// <summary>
    /// Topic
    /// </summary>
    /// <param name="route"></param>
    /// <param name="message"></param>
    /// <returns></returns>
    [HttpGet("Topic")]
    public string Topic(string route = "topic1.a", string message = "Topic")
    {
        var producer = rabbitProducerFactory.Create("TopicPattern");
        producer.Publish(route, message);

        return "success";
    }

　　消费者（AspNetCore.WebApi.Consumer）

　　生产者和消费者不在同一个项目中，同样的，需要先在Startup的ConfigureServices方法中添加服务：　　

　　

    public void ConfigureServices(IServiceCollection services)
    {
        string[] hosts = new string[] { "192.168.209.133", "192.168.209.134", "192.168.209.135" };
        int port = 5672;
        string userName = "admin";
        string password = "123456";
        string virtualHost = "/";
        var arguments = new Dictionary<string, object>() { { "x-queue-type", "classic" } };

        #region 日志记录

        services.AddRabbitConsumer(options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.AutoAck = true;

            //options.FetchCount = 10;
            //options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.logger", Route = "#" } };//交换机模式
            //options.Type = RabbitExchangeType.Topic;//交换机模式
        })

        //.AddListener("queue.logger", result =>
        //{
        //    Console.WriteLine("Message From queue.logger:" + result.Body);
        //});

        .AddListener<RabbitConsumerListener>("queue.logger");

        //.AddListener("exchange.logger", "queue.logger", result =>
        //{
        //    Console.WriteLine("Message From queue.logger:" + result.Body);
        //});//交换机模式

        #endregion

        #region 普通模式

        services.AddRabbitConsumer(options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            //options.FetchCount = 1;
            options.AutoAck = false;
        }).AddListener("queue.simple", result =>
        {
            Console.WriteLine("Message From queue.simple:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        });
        #endregion

        #region 工作模式

        services.AddRabbitConsumer(options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.FetchCount = 2;
            options.AutoAck = false;
        }).AddListener("queue.worker", result =>
        {
            Console.WriteLine("Message From queue.worker1:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        }).AddListener("queue.worker", result =>
        {
            Console.WriteLine("Message From queue.worker2:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        });
        #endregion

        #region 发布订阅模式 

        services.AddRabbitConsumer(options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.FetchCount = 2;
            options.AutoAck = false;
            options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.fanout1" }, new RouteQueue() { Queue = "queue.fanout2" } };
            options.Type = RabbitExchangeType.Fanout;
        }).AddListener("exchange.fanout", "queue.fanout1", result =>
        {
            Console.WriteLine("Message From queue.fanout1:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        }).AddListener("exchange.fanout", "queue.fanout2", result =>
        {
            Console.WriteLine("Message From queue.fanout2:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        });

        #endregion

        #region 路由模式 

        services.AddRabbitConsumer(options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.AutoAck = false;
            options.FetchCount = 2;
            options.Type = RabbitExchangeType.Direct;
            options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.direct1", Route = "direct1" }, new RouteQueue() { Queue = "queue.direct2", Route = "direct2" } };
        }).AddListener("exchange.direct", "queue.direct1", result =>
        {
            Console.WriteLine("Message From queue.direct1:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        }).AddListener("exchange.direct", "queue.direct2", result =>
        {
            Console.WriteLine("Message From queue.direct2:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        });

        #endregion

        #region 主题模式

        services.AddRabbitConsumer(options =>
        {
            options.Hosts = hosts;
            options.Password = password;
            options.Port = port;
            options.UserName = userName;
            options.VirtualHost = virtualHost;

            options.Arguments = arguments;
            options.Durable = true;
            options.AutoDelete = true;

            options.FetchCount = 2;
            options.AutoAck = false;
            options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.topic1", Route = "topic1.#" }, new RouteQueue() { Queue = "queue.topic2", Route = "topic2.#" } };
            options.Type = RabbitExchangeType.Topic;
        }).AddListener("exchange.topic", "queue.topic1", result =>
        {
            Console.WriteLine("Message From queue.topic1:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        }).AddListener("exchange.topic", "queue.topic2", result =>
        {
            Console.WriteLine("Message From queue.topic2:" + result.Body);
            result.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
        });

        #endregion

        ......
    }

　　无论是日志的消费，还是其他五种模式的消费，都是先使用AddRabbitConsumer方法获取到一个IRabbitConsumerBuilder消费者构造对象，然后它的通过AddListener方法添加消息处理程序。

　　同样的，需要注意的是，普通模式和工作模式是不基于交换机的策略模式，因此需要使用不包含交换机参数的AddListener方法：　　

    #region 普通模式

    services.AddRabbitConsumer(options =>
    {
        options.Hosts = hosts;
        options.Password = password;
        options.Port = port;
        options.UserName = userName;
        options.VirtualHost = virtualHost;

        options.Arguments = arguments;
        options.Durable = true;
        options.AutoDelete = true;

        //options.FetchCount = 1;
        options.AutoAck = false;
    }).AddListener("queue.simple", result =>
    {
        Console.WriteLine("Message From queue.simple:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    });
    #endregion

    #region 工作模式

    services.AddRabbitConsumer(options =>
    {
        options.Hosts = hosts;
        options.Password = password;
        options.Port = port;
        options.UserName = userName;
        options.VirtualHost = virtualHost;

        options.Arguments = arguments;
        options.Durable = true;
        options.AutoDelete = true;

        options.FetchCount = 2;
        options.AutoAck = false;
    }).AddListener("queue.worker", result =>
    {
        Console.WriteLine("Message From queue.worker1:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    }).AddListener("queue.worker", result =>
    {
        Console.WriteLine("Message From queue.worker2:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    });
    #endregion

　　而发布订阅模式、路由模式和主题模式都是基于交换机的策略模式，因此使用需要交换机参数的AddListener方法：　　

    #region 发布订阅模式 

    services.AddRabbitConsumer(options =>
    {
        options.Hosts = hosts;
        options.Password = password;
        options.Port = port;
        options.UserName = userName;
        options.VirtualHost = virtualHost;

        options.Arguments = arguments;
        options.Durable = true;
        options.AutoDelete = true;

        options.FetchCount = 2;
        options.AutoAck = false;
        options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.fanout1" }, new RouteQueue() { Queue = "queue.fanout2" } };
        options.Type = RabbitExchangeType.Fanout;
    }).AddListener("exchange.fanout", "queue.fanout1", result =>
    {
        Console.WriteLine("Message From queue.fanout1:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    }).AddListener("exchange.fanout", "queue.fanout2", result =>
    {
        Console.WriteLine("Message From queue.fanout2:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    });

    #endregion

    #region 路由模式 

    services.AddRabbitConsumer(options =>
    {
        options.Hosts = hosts;
        options.Password = password;
        options.Port = port;
        options.UserName = userName;
        options.VirtualHost = virtualHost;

        options.Arguments = arguments;
        options.Durable = true;
        options.AutoDelete = true;

        options.AutoAck = false;
        options.FetchCount = 2;
        options.Type = RabbitExchangeType.Direct;
        options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.direct1", Route = "direct1" }, new RouteQueue() { Queue = "queue.direct2", Route = "direct2" } };
    }).AddListener("exchange.direct", "queue.direct1", result =>
    {
        Console.WriteLine("Message From queue.direct1:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    }).AddListener("exchange.direct", "queue.direct2", result =>
    {
        Console.WriteLine("Message From queue.direct2:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    });

    #endregion

    #region 主题模式

    services.AddRabbitConsumer(options =>
    {
        options.Hosts = hosts;
        options.Password = password;
        options.Port = port;
        options.UserName = userName;
        options.VirtualHost = virtualHost;

        options.Arguments = arguments;
        options.Durable = true;
        options.AutoDelete = true;

        options.FetchCount = 2;
        options.AutoAck = false;
        options.RouteQueues = new RouteQueue[] { new RouteQueue() { Queue = "queue.topic1", Route = "topic1.#" }, new RouteQueue() { Queue = "queue.topic2", Route = "topic2.#" } };
        options.Type = RabbitExchangeType.Topic;
    }).AddListener("exchange.topic", "queue.topic1", result =>
    {
        Console.WriteLine("Message From queue.topic1:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    }).AddListener("exchange.topic", "queue.topic2", result =>
    {
        Console.WriteLine("Message From queue.topic2:" + result.Body);
        result.Commit();
        //result.RollBack();//回滚，参数表示是否重新消费
    });

    #endregion

　　另外，AddListener中的消息处理委托可以使用一个实现了IRabbitConsumerListener接口的类代替，如Demo中的RabbitConsumerListener：　　

    public class RabbitConsumerListener : IRabbitConsumerListener
    {
        public Task ConsumeAsync(RecieveResult recieveResult)
        {
            Console.WriteLine("RabbitConsumerListener:" + recieveResult.Body);
            recieveResult.Commit();
            //result.RollBack();//回滚，参数表示是否重新消费
            return Task.CompletedTask;
        }
    }