@GetMapping("/ruleTrie")
    public Flux<Set<String>> getRuleTrieKeys() {
        ShenyuTrie ruleTrie = SpringBeanUtils.getInstance().getBean(TrieCacheTypeEnum.RULE.getTrieType());
        return Flux.just(ruleTrie.getKeyRootKeys());
    }
get rule trie cache key set.

@return trie cache key sets
shenyu-web/src/main/java/org/apache/shenyu/web/endpoint/ShenyuControllerEndpoint.java