rabbitMQ使用一——helloworld

参考链接 ：https://blog.csdn.net/zhulongxi/article/details/72867545

                  https://www.cnblogs.com/ericli-ericli/p/5917018.html

1.新建RabbitMQTest解决方案，包含producer生产者和consumer消费者两个工程

2、添加RabbitMQ.Client引用

在项目的引用上右键选择管理nuget程序包，搜索RabbitMQ.Client.dll，然后安装，因为最新的需要Framework4.5以上，所以如果是4.0的Framework的话需要修改成高版本的

3、producer工程下的代码

using RabbitMQ.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace RabbitMQTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";
            factory.UserName = "zka";
            factory.Password = "123";

            using (var connection = factory.CreateConnection())
            {
                using (var channel = connection.CreateModel())
                {
                    channel.QueueDeclare("hello", false, false, false, null);
                    string message = "Hello World";
                    var body = Encoding.UTF8.GetBytes(message);
                    channel.BasicPublish("", "hello", null, body);
                    Console.WriteLine(" set {0}", message);
                }
            }
        }
    }
}

4、consumer代码

using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Consumer
{
    class Program
    {
        static void Main(string[] args)
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";
            factory.UserName = "zka";
            factory.Password = "123";

            using (var connection = factory.CreateConnection())
            {
                using (var channel = connection.CreateModel())
                {
                    channel.QueueDeclare("hello", false, false, false, null);

                    var consumer = new QueueingBasicConsumer(channel);
                    channel.BasicConsume("hello", true, consumer);

                    Console.WriteLine(" waiting for message.");
                    while (true)
                    {
                        var ea = (BasicDeliverEventArgs)consumer.Queue.Dequeue();

                        var body = ea.Body;
                        var message = Encoding.UTF8.GetString(body);
                        Console.WriteLine("Received {0}", message);

                    }
                }
            }
        }
    }
}

 5、将producer设置为启动项，先运行生产者，屏幕一闪退出了，然后查看RabbitMQ Management页面的Queues选项http://localhost:15672/#/queues，看到如下图，队列中已经收到一个消息

可以多运行几次producer，可以看到每运行一次，消息队列里的消息数量就会加1，如下图运行了5次producer

6、然后将consumer项目设置为启动项，运行，如下图所示，打印出来5次，并且持续监控消息队列

此时，消息队列中的消息又变为了0，如下图

7、可能出现的问题及解决办法

执行时VS报错：

“RabbitMQ.Client.Exceptions.BrokerUnreachableException”类型的未经处理的异常在 RabbitMQ.Client.dll 中发生 其他信息: None of the specified endpoints were reachable。

进入查看详细的内部异常：

innerEception:{"The AMQP operation was interrupted: AMQP close-reason, initiated by Peer, code=530, text=\"NOT_ALLOWED - access to vhost '/' refused for user 'eric'\", classId=10, methodId=40, cause="}

此时，我们打开在http://localhost:15672/#/users 可以看到eric 下 的Can access virtual hosts 为 NoAccess

解决办法：

rabbitmqctl控制台输入

rabbitmqctl set_permissions -p / userName "." "." ".*"

再次执行时，可以看到：