@Override
    public void handlerRule(final RuleData ruleData) {
        Optional.ofNullable(ruleData.getHandle()).ifPresent(s -> {
            final WafHandle wafHandle = GsonUtils.getInstance().fromJson(s, WafHandle.class);
            CACHED_HANDLE.get().cachedHandle(CacheKeyUtils.INST.getKey(ruleData), wafHandle);
        });
    }
The type Waf plugin data handler.
shenyu-plugin/shenyu-plugin-waf/src/main/java/org/apache/shenyu/plugin/waf/handler/WafPluginDataHandler.java