Spring Cloud：如何在Zuul网关中为Hystrix定义默认回退？

Question

I am using Spring Cloud Brixton.M3 and Spring Boot 1.3.0.RELEASE. I am sort of new in this (especially in Spring Cloud). I have created Registry Server (ie Eureka instance), Config server and Gateway.
As per my requirement I am intercepting each request hitting the gateway in one of my Filter to extract required information from Header and based upon that I am throwing exception or forwarding / verifying that request using Feign Client . Some time hystrix throw HystrixRuntimeException when it couldn't reach out to respective services or because of any other issues.

So What I want is:

1. Provide default fallback method for every forwarding request, so that I can read and process it accordingly.
2. Global Exception handling other than @ControllerAdvice since I am not providing any custom @HystrixCommand and Controller to call services (AOP based solution ?).
3. Is it possible to intercept every failed request and retry them for certain number of times ? Internally it might be happening but can I override this functionality and handle each failed request either because of TimedOutException or because of HttpConnectionPool exception ?

Update
Is it a good practice to provide own routing in Zuul gateway ? using @RestController and @HystrixCommand together ? (I think its a bad idea, because over the period of time we will end up with lots of controllers and hence actual use of intelligent routing wouldn't work as expected)

Answer 1

Currently there is an open issue for fallbacks with feign. There is also an open issue for fallbacks with zuul.