Question

下面FailedMessageAspect.afterMethod()期间RabbitConsumerMain.main()成功调用。但是，当它在侦听RabbitMQ消息的上下文中使用时不会被调用 - 当MessageHandlerImpl.handleMesasge()从RabbitMQ队列接收消息时。知道为什么吗？

FailedMessageAspect.java

@Aspect
@Component
public class FailedMessageAspect {

    @AfterReturning("execution(* com..MessageHandlerImpl.testAspect(..))")
    private void afterMethod() {
        System.out.println("aspect foo");
    }
}

MessageHandlerImpl.java

@Component
public class MessageHandlerImpl implements MessageHandler {

    @Override
    public void testAspect() {
        System.out.println("handler foo");
    }

    @Override
    public void handleMessage(String message) {
        // handleMessage is called successfully when message is received
        testAspect();
        // FailedMessageAspect.afterMethod() does not get called
    }
}

RabbitConsumerMain.java

@Controller
@SpringBootApplication
public class RabbitConsumerMain implements CommandLineRunner {

    @Autowired
    private MessageHandler messageHandler;

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

    @Override
    public void run(String... args) {
        messageHandler.testAspect();
        //FailedMessageSpect.afterMethod() gets called right here
    }
}

ConsumerConfiguration.java

@Configuration
public class ConsumerConfiguration {
    @Autowired @Lazy
    private MessageHandler messageHandler;

    //other standard AMQP configs

    @Bean
    public MessageListenerContainer messageListenerContainer() {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
        container.setConnectionFactory(connectionFactory());
        container.setQueues(workQueue());
        MessageListenerAdapter adapter = new MessageListenerAdapter(messageHandler, new Jackson2JsonMessageConverter());
        container.setMessageListener(adapter);
        return container;
    }
}

Answer 1

您没有显示所有配置，但为了清楚起见，Spring AOP 不建议内部方法调用，例如handleMessage调用testAspect()同一个班级实例。

你需要使用AspectJ;否则，您建议的所有方法必须是通过bean定义调用的公共方法，因此Spring可以通过代理调用该方法。永远不建议在bean中进行内部调用。

有关完整说明，请参阅the reference manual。

在侦听RabbitMQ消息的上下文中不会触发Aspect

1 个答案: