怎么使用BlockExceptionHandler?

定义了继承自BlockExceptionHandler的bean，然后对一个api进行了限流

但是bean的handle没有触发，而是抛了UndeclaredThrowableException异常。

然后看了SentinelResourceAspect，里面抛异常时好像先按有blockHander就按blockHandler处理，否则按fallback处理， 如果两者都没时抛异常

@Component public class SentinelExceptionHandler implements BlockExceptionHandler { @Override public void handle(HttpServletRequest request, HttpServletResponse response, BlockException e) throws Exception { Map<String, Object> resp = new HashMap<>(); // 不同的异常返回不同的提示语 String message = null; if (e instanceof FlowException) { message = "被限流了"; } else if (e instanceof DegradeException) { message = "服务降级了"; } else if (e instanceof ParamFlowException) { message = "被限流了"; } else if (e instanceof SystemBlockException) { message = "被系统保护了"; } else if (e instanceof AuthorityException) { message = "被授权了"; } response.setCharacterEncoding("utf-8"); response.setHeader("content-Type", "application/json"); response.getWriter().print("{"status":"1", "message":"" + message +""}"); } }

限流api

@RestController @RequestMapping(value = "/api/test", produces = {"application/json"}) public class TestController { @GetMapping(value = "/hello/{name}") @SentinelResource(value = "sayHello") public String apiHello(@PathVariable String name) { return "hello, " + name; } }

怎么使用BlockExceptionHandler?

原提问者GitHub用户jmbkeyes