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