public static String dataKey(final ServerWebExchange exchange) {
        //// todo 2022/3/16 current use the request path, maybe use the key from admin config.
        URI uri = exchange.getRequest().getURI();
        return DigestUtils.md5Hex(String.join(KEY_JOIN_RULE, uri.getQuery(), uri.getRawPath()));
    }
the cache data key.

@param exchange the exchange.
@return data key
shenyu-plugin/shenyu-plugin-cache/shenyu-plugin-cache-handler/src/main/java/org/apache/shenyu/plugin/cache/utils/CacheUtils.java