NETCore中RabbitMQ的使用

时间:2021-07-19 05:04:58

NET中RabbitMQ的使用

https://www.cnblogs.com/xibei666/p/5931267.html

概述

  MQ全称为Message Queue, 消息队列(MQ)是一种应用程序对应用程序的通信方法。RabbitMQ是一个在AMQP基础上完整的,可复用的企业消息系统。他遵循Mozilla Public License开源协议。AMQP(高级消息队列协议) 是一个异步消息传递所使用的应用层协议规范,作为线路层协议,而不是API(例如JMS),AMQP 客户端能够无视消息的来源任意发送和接受信息。AMQP的原始用途只是为金融界提供一个可以彼此协作的消息协议,而现在的目标则是为通用消息队列架构提供通用构建工具。因此,面向消息的中间件 (MOM)系统,例如发布/订阅队列,没有作为基本元素实现。AMQP当中有四个概念非常重要(一个虚拟主机持有一组交换机、队列和绑定):

virtual host,虚拟主机

exchange,交换机

queue,队列

binding,绑定

  更多理论性东西可以参考(在Windows上安装Rabbit MQ 指南),针对队列的讲解相当详细

Window下安装RabbbitMQ

文件下载安装

Rabbit MQ 是建立在强大的Erlang OTP平台上,因此安装Rabbit MQ的前提是安装Erlang。通过下面两个连接下载安装3.2.3 版本:

下载并安装 Erlang OTP For Windows (vR16B03)

运行安装 Rabbit MQ Server Windows Installer (v3.2.3)

默认安装的Rabbit MQ 监听端口是5672。先安装Erlang OTP后安装RabbitMQ,安装方式默认即可,RabbitMQ可以勾选安装后台服务、服务启动和停止等操作。

激活Rabbit MQ's Management Plugin

使用Rabbit MQ 管理插件,可以更好的可视化方式查看Rabbit MQ 服务器实例的状态,打开CMD命令,cd到安装目录(..\rabbitmq_server-3.2.3\sbin)下,输入下面的命令激活:

rabbitmq-plugins enable rabbitmq_management

要重启服务才能生效,可以执行

net stop RabbitMQ && net start RabbitMQ

输入网址,打开监控页面: http://localhost:15672 (默认账号和密码:guest 和guest)

配置RabbitMQ用户权限

RabbitMQ是存在用户权限的,默认是guest 密码也是guest,隶属于Administrator管理员下。现需要配置新用户和权限,继续打开CMD命令,cd到安装目录sbin下:

用户操作指令:

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::查询服务状态

rabbitmqctl status

::列举虚拟主机列表

rabbitmqctl list_vhosts

::列举用户列表

rabbitmqctl list_users

:: 添加用户和密码

rabbitmqctl add_user hao abc123

:: 设置权限

rabbitmqctl set_permissions yy "." "." ".*"

:: 分配用户组

rabbitmqctl set_user_tags yy administrator

:: 删除guest用户

rabbitmqctl delete_user guest

::修改用户密码

rabbitmqctl change_password {username} {newpassowrd}

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.NET中RabbitMQ使用

1、Nuget下载RabbitMQ.Client第三方类库,版本V3.6.5,高版本与.NET Framework 4.5有冲突,RabbitMQ Client地址

2、利用RabbitMQ Clinet类库编码(代码内容有注释,此处不做详细解释,文章后有完整代码的下载地址)

  <1>RabbitMQ的direct类型Exchange

   Producter发送消息代码:

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///



/// 连接配置

///

private static readonly ConnectionFactory rabbitMqFactory = new ConnectionFactory(){

HostName ="192.168.1.8",UserName="hao",Password="abc123",Port= 5672

};

///



/// 路由名称

///

const string ExchangeName = "justin.exchange";

    //队列名称
const string QueueName = "justin.queue";
public static void DirectExchangeSendMsg()
{
using (IConnection conn = rabbitMqFactory.CreateConnection())
{
using (IModel channel = conn.CreateModel())
{
channel.ExchangeDeclare(ExchangeName, "direct", durable: true, autoDelete: false, arguments: null);
channel.QueueDeclare(QueueName, durable: true, autoDelete: false, exclusive: false, arguments: null);
channel.QueueBind(QueueName, ExchangeName, routingKey: QueueName); var props = channel.CreateBasicProperties();
props.Persistent = true;
string vadata = Console.ReadLine();
while (vadata != "exit")
{
var msgBody = Encoding.UTF8.GetBytes(vadata);
channel.BasicPublish(exchange: ExchangeName, routingKey: QueueName, basicProperties: props, body: msgBody);
Console.WriteLine(string.Format("***发送时间:{0},发送完成,输入exit退出消息发送",DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));
vadata = Console.ReadLine();
}
}
}
}

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  Customer接收消息代码:

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///



/// 连接配置

///

private static readonly ConnectionFactory rabbitMqFactory = new ConnectionFactory() {

HostName = "192.168.1.8", UserName = "hao", Password = "abc123", Port = 5672

};

///



/// 路由名称

///

const string ExchangeName = "justin.exchange";

    //队列名称
const string QueueName = "justin.queue";
public static void DirectAcceptExchange()
{
using (IConnection conn = rabbitMqFactory.CreateConnection())
{
using (IModel channel = conn.CreateModel())
{
channel.ExchangeDeclare(ExchangeName, "direct", durable: true, autoDelete: false, arguments: null);
channel.QueueDeclare(QueueName, durable: true, autoDelete: false, exclusive: false, arguments: null);
channel.QueueBind(QueueName, ExchangeName, routingKey: QueueName);
while (true)
{
BasicGetResult msgResponse = channel.BasicGet(QueueName, noAck: true);
if (msgResponse != null)
{
var msgBody = Encoding.UTF8.GetString(msgResponse.Body);
Console.WriteLine(string.Format("***接收时间:{0},消息内容:{1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"),msgBody));
} //BasicGetResult msgResponse2 = channel.BasicGet(QueueName, noAck: false); ////process message ... //channel.BasicAck(msgResponse2.DeliveryTag, multiple: false);
System.Threading.Thread.Sleep(TimeSpan.FromSeconds(1));
}
}
}
}

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  但是这种处理速度较慢,因为循环线程等待。高效的接收消息的方式可以使用EventingBasicConsumer进行消息接收处理,修改代码内容如下:

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public static void DirectAcceptExchangeEvent()

{

using (IConnection conn = rabbitMqFactory.CreateConnection())

{

using (IModel channel = conn.CreateModel())

{

//channel.ExchangeDeclare(ExchangeName, "direct", durable: true, autoDelete: false, arguments: null);

channel.QueueDeclare(QueueName, durable: true, autoDelete: false, exclusive: false, arguments: null);

//channel.QueueBind(QueueName, ExchangeName, routingKey: QueueName);

var consumer = new EventingBasicConsumer(channel);

consumer.Received += (model, ea) =>

{

var msgBody = Encoding.UTF8.GetString(ea.Body);

Console.WriteLine(string.Format("***接收时间:{0},消息内容:{1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), msgBody));

};

channel.BasicConsume(QueueName, noAck: true, consumer: consumer);

                //已过时用EventingBasicConsumer代替
//var consumer2 = new QueueingBasicConsumer(channel);
//channel.BasicConsume(QueueName, noAck: true, consumer: consumer);
//var msgResponse = consumer2.Queue.Dequeue(); //blocking
//var msgBody2 = Encoding.UTF8.GetString(msgResponse.Body); Console.WriteLine("按任意值,退出程序");
Console.ReadKey();
}
}
}

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  但是有些时候,消费者同一时间没有能力处理太多的业务,导致分配过来的队列消息不能及时处理完成,这个时候,我们可以设置BasicQos属性,告诉Broker同一时间将未处理完成的消息分配其他消费者,所以接收消息的地方需要略做修改,代码如下:

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public static void DirectAcceptExchangeTask()

{

using (IConnection conn = rabbitMqFactory.CreateConnection())

{

using (IModel channel = conn.CreateModel())

{

//channel.ExchangeDeclare(ExchangeName, "direct", durable: true, autoDelete: false, arguments: null);

channel.QueueDeclare(QueueName, durable: true, autoDelete: false, exclusive: false, arguments: null);

channel.BasicQos(prefetchSize: 0, prefetchCount: 1, global: false);//告诉broker同一时间只处理一个消息

//channel.QueueBind(QueueName, ExchangeName, routingKey: QueueName);

var consumer = new EventingBasicConsumer(channel);

consumer.Received += (model, ea) =>

{

var msgBody = Encoding.UTF8.GetString(ea.Body);

Console.WriteLine(string.Format("***接收时间:{0},消息内容:{1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), msgBody));

int dots = msgBody.Split('.').Length - 1;

System.Threading.Thread.Sleep(dots * 1000);

Console.WriteLine(" [x] Done");

//处理完成,告诉Broker可以服务端可以删除消息,分配新的消息过来

channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);

};

//noAck设置false,告诉broker,发送消息之后,消息暂时不要删除,等消费者处理完成再说

channel.BasicConsume(QueueName, noAck: false, consumer: consumer);

        Console.WriteLine("按任意值,退出程序");
Console.ReadKey();
}
}

}

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  <2> RabbitMQ的Topic类型Exchange

  Producter 发送消息代码:

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///



/// 连接配置

///

private static readonly ConnectionFactory rabbitMqFactory = new ConnectionFactory(){

HostName ="192.168.1.8",UserName="hao",Password="abc123",Port= 5672

};

///



/// 路由名称

///

const string TopExchangeName = "topic.justin.exchange";

    //队列名称
const string TopQueueName = "topic.justin.queue"; public static void TopicExchangeSendMsg()
{
using (IConnection conn = rabbitMqFactory.CreateConnection())
{
using (IModel channel = conn.CreateModel())
{
channel.ExchangeDeclare(TopExchangeName, "topic", durable: false, autoDelete: false, arguments: null);
channel.QueueDeclare(TopQueueName, durable: false, autoDelete: false, exclusive: false, arguments: null);
channel.QueueBind(TopQueueName, TopExchangeName, routingKey: TopQueueName);
//var props = channel.CreateBasicProperties();
//props.Persistent = true;
string vadata = Console.ReadLine();
while (vadata != "exit")
{
var msgBody = Encoding.UTF8.GetBytes(vadata);
channel.BasicPublish(exchange: TopExchangeName, routingKey: TopQueueName, basicProperties: null, body: msgBody);
Console.WriteLine(string.Format("***发送时间:{0},发送完成,输入exit退出消息发送", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));
vadata = Console.ReadLine();
}
}
}
}

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  Customer接收消息代码:

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///



/// 连接配置

///

private static readonly ConnectionFactory rabbitMqFactory = new ConnectionFactory() {

HostName = "192.168.1.8", UserName = "hao", Password = "abc123", Port = 5672

};

    /// <summary>
/// 路由名称
/// </summary>
const string TopExchangeName = "topic.justin.exchange"; //队列名称
const string TopQueueName = "topic.justin.queue"; public static void TopicAcceptExchange()
{
using (IConnection conn = rabbitMqFactory.CreateConnection())
{
using (IModel channel = conn.CreateModel())
{
channel.ExchangeDeclare(TopExchangeName, "topic", durable: false, autoDelete: false, arguments: null);
channel.QueueDeclare(TopQueueName, durable: false, autoDelete: false, exclusive: false, arguments: null);
channel.BasicQos(prefetchSize: 0, prefetchCount: 1, global: false);
channel.QueueBind(TopQueueName, TopExchangeName, routingKey: TopQueueName);
var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var msgBody = Encoding.UTF8.GetString(ea.Body);
Console.WriteLine(string.Format("***接收时间:{0},消息内容:{1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), msgBody));
int dots = msgBody.Split('.').Length - 1;
System.Threading.Thread.Sleep(dots * 1000);
Console.WriteLine(" [x] Done");
channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
};
channel.BasicConsume(TopQueueName, noAck: false, consumer: consumer); Console.WriteLine("按任意值,退出程序");
Console.ReadKey();
}
}
}

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参考资料:

在 Windows 上安装Rabbit MQ 指南(http://www.cnblogs.com/shanyou/p/4067250.html)

.NET 环境中使用RabbitMQ(http://www.cnblogs.com/yangecnu/p/4227535.html)

RabbitMQ Tutorial(http://www.rabbitmq.com/tutorials/tutorial-six-dotnet.html)

源代码下载

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