How to use HystrixCommand inside a spring AOP class

in my current project, I'm required to use Hystrix for request fallback handling(mainly on request timeout fallback). I have tested a simple case, which is putting the @HystrixCommand annotation above one spring rest controller method, like the one below:

@RestController
public class xxxxxx {

    @RequestMapping(value = "xxxxxxx")
        @HystrixCommand(fallbackMethod="fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "2000"),
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "2000")
    })
    public String xxxxxx(@RequestParam(value = "xxxx", required = true) String xxxx) {
        ....
        return json.toString();
    }

}

This works pretty well. Timeout is triggerred after 2 seconds and it goes into the fallback method I predefined. Now the problem comes: There are too many methods in on controller and there are many controllers in the project. Copy&paste the @HystrixCommand method by method would not be a good idea, and I'm required to implement it by spring aop. Then I wrote something as below:

@Aspect
@Configuration
public class TimeoutMonitor {

    @Pointcut("execution(xxxxxxxx)")
    public void excuteService() {}

    @Around("excuteService()")
    @HystrixCommand(fallbackMethod="fallback", commandProperties = {
        @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "2000"),
        @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "2000")
    })
    public Object monitor(ProceedingJoinPoint pjp){
        try {
            Object output = pjp.proceed();
            return output;
        }catch(Throwable e) {
            return null;
        }
    }

    @HystrixCommand
    public String fallback(ProceedingJoinPoint pjp) {
        JSONObject json = new JSONObject();
        json.put("message", "request timeout");
        return json.toString();
    }
}

And it's not working... The fallback method is never reached

During the debugging, I have made sure that the logic flow goes through the flow of excuteService()->monitor()->matched method, and it's already passing 2 seconds, but the fallback method is never reached. I have researched on this problem and find that @HystrixCommand is also implemented by AOP. I guess putting one aop in another is the reason that causes this problem, but unfortunately I can't think of an approach to resolve it.

I would be grateful if someone can provide a solution. Solutions not implemented by aop are also admitted, but absolutely copy&paste @HystrixCommand above each method is not allowed.