.net core 平台下的RabbitMQ封装：RabbitMQ.Helper

.net core 平台下的RabbitMQ封装：RabbitMQ.Helper

• 初衷：RabbitMQ官方提供的RabbitMQ.Client用起来感觉有点麻烦，遂略微封装一番，希望能提升效率。

• 说明：RabbitMQ.Helper没有做到像EasyNetQ那样的高级封装，仅对RabbitMQ的基于Exchange/RoutingKey/Queue进行的一次封装，延迟队列也实现了封装（不过当前版本延迟队列还在内测中）

• 安装：nuget搜索RabbitMQ.Helper 或 RabbitMQ.Helper.Injection （作者zed）

• 版本：截止发文，1.0.2

RabbitMQ.Helper

• 生产者

       //定义连接信息提供器
        RabbitMQProvider provider = new RabbitMQProvider("host", 5672, "guest", "guest", "/");

        //定义交换器参数
        ProducterOptions options = new ProducterOptions()
        {
     
            Exchange = "test.exchange",
            Mode = ExchangeMode.Direct,
            Durable = true,
            AutoDelete = false,
            Args = null
        };

        //定义生产者
        Producter producter = new Producter(provider, options);
        //发布消息
        producter.Publish(body: "HelloRabbit", routingKey: "test.exchange.routing");

• 事件消费

            ConsumerOptions options = new ConsumerOptions()
            {
     
                SubscribeExchange = "test.exchange",
                SubscribeRouting = "test.exchange.routing",
                SubscribeQueue = "test.exchange.queue"
            };
            EventConsumer consumer = new EventConsumer(provider, options);
            consumer.Subscribe(msg =>
            {
     
                Log($"[接收] {msg}");
                return true;
            });

• 手动拉取消费

            ConsumerOptions options = new ConsumerOptions()
            {
     
                SubscribeExchange = "test.exchange",
                SubscribeRouting = "test.exchange.routing",
                SubscribeQueue = "test.exchange.queue"
            };
            PullConsumer puller = new PullConsumer(provider, options);
            string msg = puller.Pull();

Asp.net Core 扩展 ：RabbitMQ.Helper.Injection

• 注入

      //注入RabbitMQHelper
        services.AddRabbitMQHelper(x =>
        {
     
            //增加连接信息提供器
            x.AddProvider(new RabbitMQProvider("host", 5672, "guest", "guest", "/"));
            //通过exchange注入生产者,可选参数option允许自定义配置
            x.AddProducter("r.h.asp.text.direct.exchange",option => option.Durable = false);
            // [推荐] 通过创建生产者类，泛型注入，与exchange名称注入二选一，或混用
            x.AddProducter<DemoProducter>();
        });
        //注入消费者
        services.AddSingleton<DemoConsumer>();


        //别忘了,public void Configure(IApplicationBuilder app)中的使用 !!!
        app.UseRabbitSubcribes(Assembly.GetExecutingAssembly());
        

• 通过exchange注入时，在controller/service中获取生产者实例

    public class DemoService : IDemoService
    {
     
        //RabbitMQ工厂，获取生产者
        //该类里维护了一个ConcurrentDictionary，根据exchange名获取Producter实例
        private readonly RabbitMQFactory factory;

        public DemoService(RabbitMQFactory factory)
        {
     
            this.factory = factory;
        }

        public void TestSend()
        {
     
            Producter producter = factory.GetProducter("r.h.asp.text.direct.exchange");
            producter.Publish(body: "HelloRabbit", routingKey: "test.exchange.routing");
        }
    }

• [推荐] 创建生产者类，泛型注入时，在controller/service中获取生产者实例

    public class Demo2Service : IDemoService
    {
     
        private readonly DemoProducter producter;
        public Demo2Service(DemoProducter producter)
        {
     
            this.producter = producter;
        }

        public void TestSend()
        {
     
            producter.Publish(body: "HelloRabbit", routingKey: "test.exchange.routing");
        }
    }

    /// 

    /// 生产者实例，继承自ProducterProxy
    /// 
    public class DemoProducter : ProducterProxy
    {
     
        public override ProducterOptions Options => new ProducterOptions()
        {
     
            Exchange = "r.h.asp.text.direct.exchange",
            Durable = false
        };
        
        //provider由ioc注入
        public DemoProducter(RabbitMQProvider provider) : base(provider)
        {
     
        }
    }

• 消费者实例

/// 

    /// 实现IConsumer(空接口，起到标注作用)
    /// 
    public class DemoConsumer : IConsumer
    {
       
        /// 

        /// 特性标注该方法监听某条队列的消息
        /// 
        /// 第一个参数，作为要接收的实体类
        [RabbitSubscribe("exchange","routing","queue")]
        public void Test(User user)
        {
     
            Logger.Info($"[接收] Id={user.Id} Time={user.Time}");          
        }

        /// 

        /// 也可写全队列参数
        /// 
        /// 
        [RabbitSubscribe(
            Exchange = "exchange",
            Routing = "routing",
            Queue = "queue",
            Durable = false,
            AutoDelete = false,
            Exclusive = false)]
        public void Test2(User user)
        {
     
            Logger.Info($"[接收] Id={user.Id} Time={user.Time}");
        }
    }