消息队列模型
RabbitMQ设置
RabbitMQ动态库安装
RabbitMQ.Client相关知识点
示例效果图
核心代码
消息队列模型所有 MQ 产品从模型抽象上来说都是一样的过程:
消费者(consumer)订阅某个队列。生产者(producer)创建消息,然后发布到队列(queue)中,最后将消息发送到监听的消费者。
RabbitMQ是通过交换机将消息转发到对应队列,所以队列需要和交换机进行绑定。本例将队列绑定到默认的amq.direct交换机,并设置Routing key,如下图所示:
RabbitMQ动态库安装通过NuGet包管理器进行安装RabbitMQ.Client,如下所示:
RabbitMQ.Client相关知识点ConnectionFactory:构造一个实例,主要创建连接。
IConnection:表示一个基于AMQP协议的连接。
IModel:表示一个RabbitMQ通道,可用于声明一个队列,然后开始消费。
EventingBasicConsumer:基于独立事件监听的基础消费者,可以监听并接收消息。
生产者基本步骤:1. 创建连接 2. 基于连接创建通道 3. 基于通道声明队列,4. 开始生产并发布消息
消费者基本步骤:1. 创建连接 2. 基于连接创建通道 3. 基于通道声明队列,4. 创建消费者,5. 绑定通道和消费者,并开始消费
示例效果图本例主要有一个生产者,一个消费者,通过消息队列进行消息转发和接收。
生产者负责消息发送,如下图所示:
消费者负责消息接收,如下图所示:
核心代码代码结构:主要包括生产者,消费者,公共基础代码,如下所示:
RabbitMqHelper主要创建连接,如下所示:
public class RabbitMqHelper
{
/// <summary>
/// 创建连接
/// </summary>
/// <returns></returns>
public IConnection GetConnection()
{
try
{
var factory = new ConnectionFactory()
{
HostName = "127.0.0.1",
Port = 5672,
UserName = "guest",
Password = "guest",
VirtualHost = "/ShortMsgHost"
};
var conn = factory.CreateConnection();
return conn;
}
catch (Exception ex) {
throw ex;
}
}
}
RabbmitMqSendHelper用于发送消息,如下所示:
public class RabbmitMqSendHelper : RabbitMqHelper
{
/// <summary>
/// 发送消息
/// </summary>
/// <param name="msg"></param>
/// <returns></returns>
public bool SendMsg(string msg)
{
try
{
using (var conn = GetConnection())
{
using (var channel = conn.CreateModel())
{
channel.QueueDeclare(queue: "ShortMsgQueue",
durable: true,
exclusive: false,
autoDelete: false,
arguments: null);
var body = Encoding.UTF8.GetBytes(msg);
channel.BasicPublish(exchange: "amq.direct",
routingKey: "ShortMsgKey",
basicProperties: null,
body: body);
//Console.WriteLine(" [x] Sent {0}", message);
};
};
return true;
}
catch (Exception ex)
{
throw ex;
}
}
}
RabbitMqReceiveHelper主要用于接收信息,如下所示:
public class RabbitMqReceiveHelper : RabbitMqHelper
{
public RabbitMqReceiveEventHandler OnReceiveEvent;
private IConnection conn;
private IModel channel;
private EventingBasicConsumer consumer;
public bool StartReceiveMsg()
{
try
{
conn = GetConnection();
channel = conn.CreateModel();
channel.QueueDeclare(queue: "ShortMsgQueue",
durable: true,
exclusive: false,
autoDelete: false,
arguments: null);
consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
var body = ea.Body.ToArray();
var message = Encoding.UTF8.GetString(body);
//Console.WriteLine(" [x] Received {0}", message);
if (OnReceiveEvent != null)
{
OnReceiveEvent(message);
}
};
channel.BasicConsume(queue: "ShortMsgQueue",
autoAck: true,
consumer: consumer);
return true;
}
catch (Exception ex)
{
throw ex;
}
}
}
作者:Alan.hsiang
出处:http://www.cnblogs.com/hsiang/
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