.net core 下使用 RabbitMQ 消息没有正确路由到队列处理方式错误消息回调 (五)

 

消息回调

   public void Producer()
        {
            string queueName = "RE_QUEUE";
            string exchangeName = "RE_EXCHANGE";
            using (var connection = RabbitMQHelper.GetConnection("192.168.3.200", 5671))
            {
                using (var channel = connection.CreateModel())
                {
                    // 声明队列
                    channel.QueueDeclare(queueName, false, false, false, null);
                    // 声明交换机[交换机没有绑定队列的情况]
                    //channel.ExchangeDeclare(exchangeName, ExchangeType.Fanout);
                    //channel.QueueBind(queueName, exchangeName, "");
                    // 声明交换机
                    channel.ExchangeDeclare(exchangeName, ExchangeType.Direct);
                    channel.QueueBind(queueName, exchangeName, "test_direct");

                    string message = "This is Return Model";
                    var body = Encoding.UTF8.GetBytes(message);
                    // 配置回调
                    channel.BasicReturn += (o, basic) =>
                     {
                         var rc = basic.ReplyCode; //消息失败的code
                         var rt = basic.ReplyText; //描述返回原因的文本。
                         var msg = Encoding.UTF8.GetString(basic.Body.Span); //失败消息的内容
                                                                             //在这里我们可能要对这条不可达消息做处理，比如是否重发这条不可达的消息呀，或者这条消息发送到其他的路由中等等
                         System.IO.File.AppendAllText("d:/return.txt", "调用了Return;ReplyCode:" + rc + ";ReplyText:" + rt + ";Body:" + msg+"\r\n");
                         Console.WriteLine("send message failed,不可达的消息消息监听.");
                     };

                    var properties = channel.CreateBasicProperties();
                    properties.MessageId = "fdsfdfs";
                    channel.BasicPublish(exchange: exchangeName,
                                         routingKey: "test_direct1",
                                         mandatory: true, // 必须设置该参数为true
                                         basicProperties: properties,
                                         body: body);

                    Console.WriteLine(" [x] Sent {0}", message);
                }
            }
        }