RabbitMQ介绍（一）

心已赠人 2022-03-19 08:16 303阅读 0赞

因为项目需要提供多种对外输出，kafka， RocketMQ。RabbitMQ这些都是对外输出选项。因此简要学些和编写rabbitMQ例子

本文属于非常初级的RabbitMQ介绍，主要包含安装、发送消息以及控台台查看消息。

# 安装 #

RabbitMQ是Erlang语言编写的，因此需要先安装Erlang。 我在Windows10安装，按照官方文档需要64-bit supported version of Erlang。 可以在http://www.erlang.org/downloads下载Erlang。以管理员身份安装Erlang。  
之后下载rabbitmq-server-3.7.11.exe，双击安装即可。

Windows上安装的官方文档在https://www.rabbitmq.com/install-windows.html

启动命令非常简单, 在安装命令的sbin目录中执行  
rabbitmq-server.bat start  
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启动管理界面  
官方文档 [https://www.rabbitmq.com/management.html][https_www.rabbitmq.com_management.html]  
rabbitmq-plugins enable rabbitmq\_management  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 1]  
登录控制台， 默认用户和密码都是guest  
[http://127.0.0.1:15672][http_127.0.0.1_15672]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 2]

# 发送消息 #

下面是一个简单java发送例子。RabbitMQ有多重语言的客户端，我们选在最常用的java client  
依赖包为

<dependency>
                <groupId>com.rabbitmq</groupId>
                <artifactId>amqp-client</artifactId>
                <version>5.1.2</version>
            </dependency>

代码为

package com.yq.producer;
    
    import com.rabbitmq.client.AMQP;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.ConnectionFactory;
    import org.apache.commons.lang3.StringUtils;
    
    import javax.websocket.SendResult;
    import java.nio.charset.Charset;
    
    /** * Simple to Introduction * className: SyncProducer * * @author EricYang * @version 2019/1/29 15:03 */
    public class SyncProducer { 
        private static final String host = ConnectionFactory.DEFAULT_HOST;
        private static final int port = ConnectionFactory.DEFAULT_AMQP_PORT;
        private static final String virtualHost = ConnectionFactory.DEFAULT_VHOST;
        private static final String username = ConnectionFactory.DEFAULT_USER;
        private static final String password = ConnectionFactory.DEFAULT_PASS;
        private static final Charset UTF8 = Charset.forName("UTF-8");
    
        public static void main(String[] args) throws Exception { 
            ConnectionFactory factory = new ConnectionFactory();
             // "guest"/"guest" by default, limited to localhost connections
            factory.setUsername(username);
            factory.setPassword(password);
            factory.setVirtualHost(virtualHost);
            factory.setHost(host);
            factory.setPort(port);
    
            Connection conn = factory.newConnection();
            Channel channel = conn.createChannel();
    
            AMQP.BasicProperties properties = null;
            String exchangeName = "name1";
            String routingKey = "key1.cc";
            String msg = "test data";
    
            try { 
                channel.basicPublish(
                        exchangeName,
                        routingKey,
                        properties,
                        msg.getBytes(UTF8));
            }
            catch (Exception ex) { 
                ex.printStackTrace();
            }
            finally { 
                channel.close();
                conn.close();
            }
    
            System.out.println("done");
        }
    }

# 查看消息 #

关于exchange和queue直接关系可以查看其它博客或者官方文档。  
例如这篇博客 [https://www.cnblogs.com/dwlsxj/p/RabbitMQ.html][https_www.cnblogs.com_dwlsxj_p_RabbitMQ.html]  
本文直接简单使用topic类型的exchagne，然后通过key将消息路由到对应queue中  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 3]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 4]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70]: /images/20220319/1781dd22ef124b0b9a2d538c79d63a31.png
[https_www.rabbitmq.com_management.html]: https://www.rabbitmq.com/management.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 1]: /images/20220319/a9083899b0af46e5beb2b863289a9fbd.png
[http_127.0.0.1_15672]: http://127.0.0.1:15672
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 2]: /images/20220319/e2118f52c15b43ba93a548075d35d0cc.png
[https_www.cnblogs.com_dwlsxj_p_RabbitMQ.html]: https://www.cnblogs.com/dwlsxj/p/RabbitMQ.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 3]: /images/20220319/ebdc688d5021400b86950746ca5358db.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1c3NsZQ_size_16_color_FFFFFF_t_70 4]: /images/20220319/3b9bf5ecf2e54cccb30d2c91efe303f3.png