@Override
    public void onAppAuthChanged(final List<AppAuthData> changed, final DataEventTypeEnum eventType) {
        if (CollectionUtils.isEmpty(changed)) {
            return;
        }
        String namespaceId = changed.stream().map(value -> StringUtils.defaultString(value.getNamespaceId(), SYS_DEFAULT_NAMESPACE_ID)).findFirst().get();
        this.updateAppAuthCache(namespaceId);
        this.afterAppAuthChanged(changed, eventType, namespaceId);
    }
fetch configuration from cache.

@param groupKey    the group key
@param namespaceId the namespaceId
@return the configuration data
shenyu-admin/src/main/java/org/apache/shenyu/admin/listener/AbstractDataChangedListener.java