SpringBoot连接多个RabbitMQ

1. 前 言

在 SpringBoot 中整合单个 RabbitMQ 使用，是很简单的，只需要引入依赖，然后在配置里面配置好 MQ 的连接地址、账号、密码等信息，然后使用即可。但如果 MQ 的连接地址是多个，那这种连接方式就不奏效了。

前段时间，我开发的一个项目就遇到了这样的问题。那个项目，好几个关联方，每个关联方用的 MQ 的地址都不相同，也就意味着我这边要连接几个 RabbbitMQ 地址。SpringBoot 连接多个 RabbitMQ，怎么搞？

使用默认的连接方式是行不通的，我已经试过，而要实现 SpringBoot 连接多个 RabbitMQ，只能自定义重写一些东西，分别配置才可以，下面一起来走一下试试。

2. 重 写

首先要明确的是，下面的两个类是需要重写的：

• RabbitTemplate：往队列里面丢消息时，需要用到
• RabbitAdmin：声明队列、声明交换机、绑定队列和交换机用到

这里，我定义两个关联方，一个是 one，一个是 two，分别重写与它们的连接工厂。

2.1 重写与关联方one的连接工厂

package com.yuhuofei.mq.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.AcknowledgeMode;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitAdmin;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.support.CorrelationData;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.amqp.SimpleRabbitListenerContainerFactoryConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

/**
 * @author yuhuofei
 * @version 1.0
 * @description 重写与关联方one的连接工厂
 * @date 2022/10/3 16:57
 */
@Slf4j
@Configuration
public class OneMQConfig {


    @Value("${one.spring.rabbitmq.host}")
    private String host;

    @Value("${one.spring.rabbitmq.port}")
    private int port;

    @Value("${one.spring.rabbitmq.username}")
    private String username;

    @Value("${one.spring.rabbitmq.password}")
    private String password;

    @Value("${one.spring.rabbitmq.virtual-host}")
    private String virtualHost;

    /**
     * 定义与one的连接工厂
     */
    @Bean(name = "oneConnectionFactory")
    @Primary
    public ConnectionFactory oneConnectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setHost(host);
        connectionFactory.setPort(port);
        connectionFactory.setUsername(username);
        connectionFactory.setPassword(password);
        connectionFactory.setVirtualHost(virtualHost);
        connectionFactory.setPublisherConfirms(true);
        connectionFactory.setPublisherReturns(true);
        return connectionFactory;
    }

    @Bean(name = "oneRabbitTemplate")
    @Primary
    public RabbitTemplate oneRabbitTemplate(@Qualifier("oneConnectionFactory") ConnectionFactory connectionFactory) {
        RabbitTemplate oneRabbitTemplate = new RabbitTemplate(connectionFactory);
        oneRabbitTemplate.setMandatory(true);
        oneRabbitTemplate.setConnectionFactory(connectionFactory);
        oneRabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            /**
             * 确认消息送到交换机(Exchange)回调
             * @param correlationData
             * @param ack
             * @param cause
             */
            @Override
            public void confirm(CorrelationData correlationData, boolean ack, String cause) {
                log.info("确认消息送到交换机(Exchange)结果：");
                log.info("相关数据：{}", correlationData);
                boolean ret = false;
                if (ack) {
                    log.info("消息发送到交换机成功, 消息 = {}", correlationData.getId());
                    //下面可自定义业务逻辑处理，如入库保存信息等
                    
                } else {
                    log.error("消息发送到交换机失败! 消息: {}}; 错误原因:cause: {}", correlationData.getId(), cause);
                    //下面可自定义业务逻辑处理，如入库保存信息等
                    
                }
            }
        });

        oneRabbitTemplate.setReturnCallback(new RabbitTemplate.ReturnCallback() {

            /**
             * 只要消息没有投递给指定的队列 就触发这个失败回调
             * @param message  投递失败的消息详细信息
             * @param replyCode 回复的状态码
             * @param replyText 回复的文本内容
             * @param exchange 当时这个消息发给那个交换机
             * @param routingKey 当时这个消息用那个路由键
             */
            @Override
            public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {
                //获取消息id
                String messageId = message.getMessageProperties().getMessageId();
                // 内容
                String result = null;
                try {
                    result = new String(message.getBody(), "UTF-8");
                } catch (Exception e) {
                    log.error("消息发送失败{}", e);
                }
                log.error("消息发送失败, 消息ID = {}; 消息内容 = {}", messageId, result);
                //下面可自定义业务逻辑处理，如入库保存信息等
            }
        });
        return oneRabbitTemplate;
    }

    @Bean(name = "oneFactory")
    @Primary
    public SimpleRabbitListenerContainerFactory oneFactory(@Qualifier("oneConnectionFactory") ConnectionFactory connectionFactory,
                                                          SimpleRabbitListenerContainerFactoryConfigurer configurer) {

        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setAcknowledgeMode(AcknowledgeMode.MANUAL);
        configurer.configure(factory, connectionFactory);
        return factory;
    }

    @Bean(name = "oneRabbitAdmin")
    @Primary
    public RabbitAdmin oneRabbitAdmin(@Qualifier("oneConnectionFactory") ConnectionFactory connectionFactory) {
        RabbitAdmin rabbitAdmin = new RabbitAdmin(connectionFactory);
        rabbitAdmin.setAutoStartup(true);
        return rabbitAdmin;
    }

}

2.2 重写与关联方two的连接工厂

package com.yuhuofei.mq.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.AcknowledgeMode;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitAdmin;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.support.CorrelationData;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.amqp.SimpleRabbitListenerContainerFactoryConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author yuhuofei
 * @version 1.0
 * @description 重写与关联方two的连接工厂
 * @date 2022/10/3 17:52
 */
@Slf4j
@Configuration
public class TwoMQConfig {

    @Value("${two.spring.rabbitmq.host}")
    private String host;

    @Value("${two.spring.rabbitmq.port}")
    private int port;

    @Value("${two.spring.rabbitmq.username}")
    private String username;

    @Value("${two.spring.rabbitmq.password}")
    private String password;

    @Value("${two.spring.rabbitmq.virtualHost}")
    private String virtualHost;

    /**
     * 定义与two的连接工厂
     */
    @Bean(name = "twoConnectionFactory")
    public ConnectionFactory twoConnectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setHost(host);
        connectionFactory.setPort(port);
        connectionFactory.setUsername(username);
        connectionFactory.setPassword(password);
        connectionFactory.setVirtualHost(virtualHost);
        connectionFactory.setPublisherConfirms(true);
        connectionFactory.setPublisherReturns(true);
        return connectionFactory;
    }

    @Bean(name = "twoRabbitTemplate")
    public RabbitTemplate twoRabbitTemplate(@Qualifier("twoConnectionFactory") ConnectionFactory connectionFactory) {
        RabbitTemplate twoRabbitTemplate = new RabbitTemplate(connectionFactory);
        twoRabbitTemplate.setMandatory(true);
        twoRabbitTemplate.setConnectionFactory(connectionFactory);
        twoRabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            /**
             * 确认消息送到交换机(Exchange)回调
             * @param correlationData
             * @param ack
             * @param cause
             */
            @Override
            public void confirm(CorrelationData correlationData, boolean ack, String cause) {
                log.info("确认消息送到交换机(Exchange)结果：");
                log.info("相关数据：{}", correlationData);
                boolean ret = false;
                if (ack) {
                    log.info("消息发送到交换机成功, 消息 = {}", correlationData.getId());
                    //下面可自定义业务逻辑处理，如入库保存信息等

                } else {
                    log.error("消息发送到交换机失败! 消息: {}}; 错误原因:cause: {}", correlationData.getId(), cause);
                    //下面可自定义业务逻辑处理，如入库保存信息等

                }
            }
        });

        twoRabbitTemplate.setReturnCallback(new RabbitTemplate.ReturnCallback() {

            /**
             * 只要消息没有投递给指定的队列 就触发这个失败回调
             * @param message  投递失败的消息详细信息
             * @param replyCode 回复的状态码
             * @param replyText 回复的文本内容
             * @param exchange 当时这个消息发给那个交换机
             * @param routingKey 当时这个消息用那个路由键
             */
            @Override
            public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {
                //获取消息id
                String messageId = message.getMessageProperties().getMessageId();
                // 内容
                String result = null;
                try {
                    result = new String(message.getBody(), "UTF-8");
                } catch (Exception e) {
                    log.error("消息发送失败{}", e);
                }
                log.error("消息发送失败, 消息ID = {}; 消息内容 = {}", messageId, result);
                //下面可自定义业务逻辑处理，如入库保存信息等
            }
        });
        return twoRabbitTemplate;
    }

    @Bean(name = "twoFactory")
    public SimpleRabbitListenerContainerFactory twoFactory(@Qualifier("twoConnectionFactory") ConnectionFactory connectionFactory,
                                                           SimpleRabbitListenerContainerFactoryConfigurer configurer) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setAcknowledgeMode(AcknowledgeMode.MANUAL);
        configurer.configure(factory, connectionFactory);
        return factory;
    }

    @Bean(name = "twoRabbitAdmin")
    public RabbitAdmin twoRabbitAdmin(@Qualifier("twoConnectionFactory") ConnectionFactory connectionFactory) {
        RabbitAdmin rabbitAdmin = new RabbitAdmin(connectionFactory);
        rabbitAdmin.setAutoStartup(true);
        return rabbitAdmin;
    }
}

2.3 创建队列及交换机并绑定

package com.yuhuofei.mq.config;

import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.core.RabbitAdmin;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;

/**
 * @author yuhuofei
 * @version 1.0
 * @description 创建队列、交换机并绑定
 * @date 2022/10/3 18:15
 */
public class QueueConfig {


    @Resource(name = "oneRabbitAdmin")
    private RabbitAdmin oneRabbitAdmin;

    @Resource(name = "twoRabbitAdmin")
    private RabbitAdmin twoRabbitAdmin;

    @Value("${one.out.queue}")
    private String oneOutQueue;

    @Value("${one.out.queue}")
    private String oneRoutingKey;

    @Value("${two.output.queue}")
    private String twoOutQueue;

    @Value("${two.output.queue}")
    private String twoRoutingKey;

    @Value("${one.topic.exchange.name}")
    private String oneTopicExchange;

    @Value("${two.topic.exchange.name}")
    private String twoTopicExchange;

    @PostConstruct
    public void oneRabbitInit() {
        //声明交换机
        oneRabbitAdmin.declareExchange(new TopicExchange(oneTopicExchange, true, false));
        //声明队列
        oneRabbitAdmin.declareQueue(new Queue(oneOutQueue, true, false, false));
        //绑定队列及交换机
        oneRabbitAdmin.declareBinding(BindingBuilder.bind(new Queue(oneOutQueue, true, false, false))
                .to(new TopicExchange(oneTopicExchange, true, false))
                .with(oneRoutingKey));
    }

    @PostConstruct
    public void twoRabbitInit() {
        //声明交换机
        twoRabbitAdmin.declareExchange(new TopicExchange(twoTopicExchange, true, false));
        //声明队列
        twoRabbitAdmin.declareQueue(new Queue(twoOutQueue, true));
        //绑定队列及交换机
        twoRabbitAdmin.declareBinding(BindingBuilder.bind(new Queue(twoOutQueue, true, false, false))
                .to(new TopicExchange(twoTopicExchange, true, false))
                .with(twoRoutingKey));
    }
}

2.4 配置信息

这里的配置信息，需要与各自的关联方约定好再配置

# 与关联方one的MQ配置
one.spring.rabbitmq.host=one.mq.com
one.spring.rabbitmq.port=5672
one.spring.rabbitmq.username=xxxxx
one.spring.rabbitmq.password=xxxxx
one.spring.rabbitmq.virtual-host=/xxxxx
one.out.queue=xxxaa.ssssd.cffs.xxxx
one.topic.exchange.name=oneTopExchange

# 与关联方two的MQ配置
two.spring.rabbitmq.host=two.mq.com
two.spring.rabbitmq.port=5672
two.spring.rabbitmq.username=aaaaaaa
two.spring.rabbitmq.password=aaaaaaa
two.spring.rabbitmq.virtualHost=/aaaaaaa
two.out.queue=ddddd.sssss.hhhhh.eeee
two.topic.exchange.name=twoTopExchange

2.5 注意点

在连接多个 MQ 的情况下，需要在某个连接加上 @Primary 注解（见 2.1 中的代码），表示主连接，默认使用这个连接，如果不加，服务会起不来

3. 使 用

3.1 作为消费者

由于在前面的 2.3 中，声明了队列及交换机，并进行了绑定，那么作为消费者，监听相应的队列，获取关联方发送的消息进行处理即可。这里用监听关联方 one 的出队列做展示，two 的类似。

需要注意的地方是，在监听队列时，需要指定 ContainerFactory。

package com.yuhuofei.mq.service;

import com.rabbitmq.client.Channel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Service;
import java.nio.charset.StandardCharsets;

/**
 * @author yuhuofei
 * @version 1.0
 * @description 监听关联方one的消息
 * @date 2022/10/3 18:38
 */
@Slf4j
@Service
public class OneReceive {

    @RabbitListener(queues = "${one.out.queue}", containerFactory = "oneFactory")
    public void listenOne(Message message, Channel channel) {
        //获取MQ返回的数据
        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
        String data = new String(message.getBody(), StandardCharsets.UTF_8);
        log.info("MQ返回的数据：{}", data);
        //下面进行业务逻辑处理
        
    }
}

3.1 作为生产者

使用之前重写的 RabbitTemplate ，向各个关联方指定的队列发送消息。文章来源地址https://www.toymoban.com/news/detail-597286.html

package com.yuhuofei.mq.service;

import com.google.gson.JsonObject;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.amqp.rabbit.support.CorrelationData;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

/**
 * @author yuhuofei
 * @version 1.0
 * @description 向关联方的队列发送消息
 * @date 2022/10/3 18:47
 */
@Slf4j
@Service
public class SendMessage {

    @Resource(name = "oneRabbitTemplate")
    private RabbitTemplate oneRabbitTemplate;

    @Resource(name = "twoRabbitTemplate")
    private RabbitTemplate twoRabbitTemplate;

    public void sendToOneMessage(String messageId, OneMessageConverter message) {
        String exchange = message.getExchange();
        String routingKey = message.getRoutingKey();
        JsonObject data = message.getData();
        MessageProperties messageProperties = new MessageProperties();
        messageProperties.setContentType("application/json");
        Message info = new Message(data.toString().getBytes(), messageProperties);
        info.getMessageProperties().setMessageId(messageId);
        oneRabbitTemplate.convertAndSend(exchange, routingKey, info, new CorrelationData(messageId));
    }

    public void sendToTwoMessage(String messageId, TwoMessageConverter message) {
        String exchange = message.getExchange();
        String routingKey = message.getRoutingKey();
        JsonObject data = message.getData();
        MessageProperties messageProperties = new MessageProperties();
        messageProperties.setContentType("application/json");
        Message info = new Message(data.toString().getBytes(), messageProperties);
        info.getMessageProperties().setMessageId(messageId);
        twoRabbitTemplate.convertAndSend(exchange, routingKey, info, new CorrelationData(messageId));
    }
}

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