Question

我是Spring AMQP的新手，只是想尝试使用注释来理解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，在这里，在convertAndSend（）中，只指定了路由键。没有给出交换名称。

配置文件如下所示 -

@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);
    }

}

这里定义了TopicExchange bean，名称为＆＃34; spring-boot-exchange＆＃34;。所以发件人发送消息给这个交换？如果有两个交换机，发送方向哪个交换机发送消息？请帮忙。

Answer 1

在这种情况下，您要发送到默认交换""：

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

不是您的主题交换。

要发送到显式交换，请使用

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

修改

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

如何在Spring boot rabbitmq中识别消息路由到的交换机？

1 个答案: