热点参数流控（Sentinel）

/**
 * 热点流控 必须使用注解 @SentinelResource
 * @param id
 * @return
 */
@RequestMapping("/getById/{id}")
@SentinelResource(value = "getById", blockHandler = "hotParamHandler")
public Object getById(@PathVariable("id") Integer id) {
    return "hi, order " + id;
}

/** 
 * 热点参数流控处理器 
 * 
 * @param id 
 * @param be 
 * @return 
 */
public Object hotParamHandler(@PathVariable("id") Integer id, BlockException be){
    return id + " -> 热点流控了";
}