1、场景

spring boot整合rabbitmq，需要将队列 queue1、queue2分别放在不同的MQ服务上MQ1、MQ2。

2、环境准备

MQ1：
IP：192.168.1.110
队列：queue1
MQ2：
IP：172.16.1.220
队列：queue2

3、关键点

实现的关键点是 创建队列 到 指定MQ服务器上。

4、实现代码

@Configuration
public class RabbitConfig {

    @Bean(name="firstConnectionFactory")
    @Primary
    public ConnectionFactory firstConnectionFactory(
            @Value("${spring.rabbitmq.first.host}") String host,
            @Value("${spring.rabbitmq.first.port}") int port,
            @Value("${spring.rabbitmq.first.username}") String username,
            @Value("${spring.rabbitmq.first.password}") String password
    ){
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setHost(host);
        connectionFactory.setPort(port);
        connectionFactory.setUsername(username);
        connectionFactory.setPassword(password);
        return connectionFactory;
    }

    @Bean(name="secondConnectionFactory")
    public ConnectionFactory secondConnectionFactory(
            @Value("${spring.rabbitmq.second.host}") String host,
            @Value("${spring.rabbitmq.second.port}") int port,
            @Value("${spring.rabbitmq.second.username}") String username,
            @Value("${spring.rabbitmq.second.password}") String password
    ){
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setHost(host);
        connectionFactory.setPort(port);
        connectionFactory.setUsername(username);
        connectionFactory.setPassword(password);
        return connectionFactory;
    }

    @Bean(name="firstRabbitTemplate")
    //@Primary  //貌似没用，移除
    public RabbitTemplate firstRabbitTemplate(
            @Qualifier("firstConnectionFactory") ConnectionFactory connectionFactory
    ){
        RabbitTemplate firstRabbitTemplate = new RabbitTemplate(connectionFactory);
        return firstRabbitTemplate;
    }

    @Bean(name="secondRabbitTemplate")
    public RabbitTemplate secondRabbitTemplate(
            @Qualifier("secondConnectionFactory") ConnectionFactory connectionFactory
    ){
        RabbitTemplate secondRabbitTemplate = new RabbitTemplate(connectionFactory);
        return secondRabbitTemplate;
    }

    @Bean(name="firstFactory")
    public SimpleRabbitListenerContainerFactory firstFactory(
            SimpleRabbitListenerContainerFactoryConfigurer configurer,
            @Qualifier("firstConnectionFactory") ConnectionFactory connectionFactory
    ) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        configurer.configure(factory, connectionFactory);
        return factory;
    }

    @Bean(name="secondFactory")
    public SimpleRabbitListenerContainerFactory secondFactory(
            SimpleRabbitListenerContainerFactoryConfigurer configurer,
            @Qualifier("secondConnectionFactory") ConnectionFactory connectionFactory
    ) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        configurer.configure(factory, connectionFactory);
        return factory;
    }

    @Bean
    public String firstQueue(
            @Qualifier("firstConnectionFactory") ConnectionFactory connectionFactory
    ) {
        try {
            connectionFactory.createConnection().createChannel(false).queueDeclare("hello1", false, false, false, null);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            return "firstQueue";
        }
    }

    @Bean
    public String secondQueue(
            @Qualifier("secondConnectionFactory") ConnectionFactory connectionFactory
    ) {
        try {
             connectionFactory.createConnection().createChannel(false).queueDeclare("hello2", false, false, false, null);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            return "secondQueue";
        }
    }


    //下面2个对列创建方式 测试后发现不是 针对指定mq 服务器创建，只会在第一个服务器创建
    /*
    @Bean
    public Queue firstQueue() {
        return new Queue("hello1");
    }

    @Bean
    public Object secondQueue() {
        return new Queue("hello2");
    }
    */
}