Sentinel hotspot key

Hotspots are frequently accessed data. In many cases, we want to count the topK data with the highest access frequency of a hotspot data and limit it.

E.g:

Merchant ID is a parameter, which counts the most frequently purchased product IDs within a period of time and restricts them.

Hotspot current limiting source code: BlockException class

There is a problem with a method, find the corresponding downgrade method @SentinelResource

test-config:

 Test code:

@GetMapping("/testHotKey")
    @SentinelResource(value = "testHotKey", blockHandler = "deal_testHostKey")
    public String testHotKey(@RequestParam(value = "p1", required = false) String p1,
                             @RequestParam(value = "p2", required = false) String p2){
        return "testHotKey";
    }

    public String deal_testHostKey(String p1, String p2, BlockException exception){
        return "deal_testHotKey";
    }

Effect:

If there is no 0th parameter, there is no access and no restrictions at this time

 If there is a 0th parameter p1, as long as the QPS exceeds 1 time per second, it will be downgraded immediately.