java - spring rabbitmq发送动态绑定(bind)交换

Question

我尝试使用 TopicExchange 来屏蔽消息。

配置:

    <rabbit:connection-factory id="connectionFactory"  host="localhost" username="guest" password="guest"/>

<rabbit:template id="rabbitTemplate" connection-factory="connectionFactory"/>

<rabbit:queue name="sample.queue"/>

<rabbit:admin id="rabbitAdmin" connection-factory="connectionFactory" />

<bean id="rabbitListenerContainerFactory"
      class="org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory">
    <property name="connectionFactory" ref="connectionFactory"/>
</bean>

<rabbit:annotation-driven container-factory="rabbitListenerContainerFactory"/>

<rabbit:listener-container connection-factory="connectionFactory" />

组件:

@Component
public class JmsComponent {

    private final Logger log = LoggerFactory.getLogger(JmsComponent.class);

    private final TopicExchange exchange = new TopicExchange("sample.exchange");

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Autowired
    private Queue queue;

    private String received;

    public void send(String msg) {
        rabbitTemplate.convertAndSend("sample.queue", new SimpleMessage(msg));
    }

    public void bindToKey(String keyMask) {
        BindingBuilder.bind(queue).to(exchange).with(keyMask);
        rabbitTemplate.setExchange(exchange.getName());
    }


    public void sendByKey(String key, String msg) {
        rabbitTemplate.convertAndSend(exchange.getName(), key, new SimpleMessage(msg));
    }

    @RabbitListener(queues = "sample.queue")
    public void handle(SimpleMessage message) {
        log.info("================ Received  " + message.getMsg());
        received = message.getMsg();
    }

    public String getReceived() {
        return received;
    }

当我使用发送时(包括 TopicExchange 之前)- 一切正常。消息被直接发送到队列并且 handle() 已经接收到它。但是对于 TopicExchange……我尝试这样使用它:

@Test
public void bind() throws InterruptedException {
    jmsComponent.bindToKey("qq");
    jmsComponent.sendByKey("qq", "message");
    Thread.sleep(5000);
    Assert.isTrue("message".equals(jmsComponent.getReceived()));
}

测试总是失败，但在日志中我看到了这个 - DEBUG o.s.amqp.rabbit.core.RabbitTemplate - Publishing message on exchange [sample.exchange]，routingKey = [qq]怎么了？？？谢谢

Answer 1

这...

BindingBuilder.bind(queue).to(exchange).with(keyMask);

...除了创建 Binding 什么都不做对象，然后将其丢弃。你需要拿那个Binding反对并调用 declareBinding在管理员上。您还需要声明交换。

因为您在上下文中有一个管理员；最简单的方法是添加 <rabbit:exchange/>到上下文(连同绑定(bind))。参见 the documentation .

<rabbit:queue id="myQueue" name="sample.queue"/>

<topic-exchange name="sample.exchange">
    <bindings>
        <binding queue="myQueue" pattern="bucket.#"/>
    </bindings>
</topic-exchange>

顺便说一句，主题交换旨在通过关键模式进行路由；如果您只是想使用固定键进行路由/绑定(bind)，例如 qq然后使用直接交换。查看RabbitMQ Tutorials .