如何在 Spring boot rabbitmq 中识别消息路由到的交换器？

Question

我是 Spring AMQP 的新手，只是想了解使用注释的 RabbitMQ java 配置。这里是示例代码。

发件人代码 -

@Component
public class Runner implements CommandLineRunner {
    private final RabbitTemplate rabbitTemplate;
    private final Receiver receiver;
    private final ConfigurableApplicationContext context;

    public Runner(Receiver receiver, RabbitTemplate rabbitTemplate,
            ConfigurableApplicationContext context) {
        this.receiver = receiver;
        this.rabbitTemplate = rabbitTemplate;
        this.context = context;
    }

    @Override
    public void run(String... args) throws Exception {
        System.out.println("Sending message...");
        rabbitTemplate.convertAndSend(Application.queueName, "Hello from RabbitMQ!");
        receiver.getLatch().await(10000, TimeUnit.MILLISECONDS);
        context.close();
    }

}

所以，这里，在convertAndSend()中，只指定了routing key。没有给出交易所名称。

配置文件如下图-

@SpringBootApplication
public class Application {

    final static String queueName = "spring-boot";

    final static String HOST = "120.27.114.229";

    final static String USERNAME = "root";

    final static String PASSWORD = "root";

    final static int PORT = 5672;

    @Bean
    Queue queue() {
        return new Queue(queueName, false);
    }

    @Bean
    TopicExchange exchange() {
        return new TopicExchange("spring-boot-exchange");
    }

    @Bean
    Binding binding(Queue queue, TopicExchange exchange) {
        return BindingBuilder.bind(queue).to(exchange).with(queueName);
    }

    @Bean  
    public ConnectionFactory connectionFactory() {  
          CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
          connectionFactory.setHost(HOST);
          connectionFactory.setPort(PORT);
          connectionFactory.setUsername(USERNAME);
          connectionFactory.setPassword(PASSWORD);
          connectionFactory.setVirtualHost("/");
          //����Ҫ����,��Ϣ�Ļص�
          connectionFactory.setPublisherConfirms(true); 
          return connectionFactory;
    } 

    @Bean
    SimpleMessageListenerContainer container(ConnectionFactory connectionFactory,
            MessageListenerAdapter listenerAdapter) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.setQueueNames(queueName);
        container.setMessageListener(listenerAdapter);
        return container;
    }

    @Bean
    MessageListenerAdapter listenerAdapter(Receiver receiver) {
        return new MessageListenerAdapter(receiver, "receiveMessage");
    }

    public static void main(String[] args) throws InterruptedException {
        SpringApplication.run(Application.class, args);
    }

}

这里定义了 TopicExchange bean，名称为 "spring-boot-exchange"。所以发件人向这个交易所发送消息？？如果有两个交换器，发送者向哪个交换器发送消息？？请帮忙。

Answer 1

在这种情况下，您发送到默认交易所 "":

rabbitTemplate.convertAndSend(Application.queueName, "Hello from RabbitMQ!");

不是你的主题交流。

要发送到显式交换，请使用

rabbitTemplate.convertAndSend("someExchange", "routingKey", "Hello from RabbitMQ!");

编辑

或者，您可以将默认交换配置为默认交换以外的其他方式。 template.setExchange("someExchange").

如何在 Spring boot rabbitmq 中识别消息路由到的交换器？

How to identify the exchange to which the message is routed to in Spring boot rabbitmq?

java

spring-boot

rabbitmq

spring-amqp