如何在Spring Boot Rabbitmq中識別消息路由到的交換機？

Question

我是Spring AMQP的新手，只是想了解使用注釋的RabbitMQ Java配置。 這里是示例代碼。

發件人代碼-

@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();
    }

}

因此，在這里，在convertAndSend（）中，僅指定了路由密鑰。 沒有給出交易所名稱。

配置文件如下圖所示-

@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);
    }

}

此處定義了TopicExchange bean，名稱為“ spring-boot-exchange”。 因此，發件人將消息發送到此交換機？ 如果有兩個交換，發件人將消息發送到哪個交換？ 請幫忙。

Answer 1

在這種情況下，您將發送到默認交換機"" ：

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

不是您的主題交流。

要發送給明確的交易所，請使用

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

編輯

或者，您可以將默認交換配置為默認交換以外的其他內容。 template.setExchange("someExchange") 。