ClassMetadata上的doFetchMultiple

Question

使用Doctrine时，我发现我有很多通过Doctrine到我的Redis服务器的检索请求，这些请求要求类元数据。 因此，我选择了一个自定义CacheProvider并重写了doFetchMultiple函数。但是ClassMetadata调用永远不会达到此功能。 我以为如果我执行“ addSelect”原则，则现在将需要此类元数据并执行doFetchMultiple。 因此，我想知道是否有可能告诉Doctrine它应该使用fetchMultiple加载此ClassMetadata吗？

    class CacheProvider extends \Doctrine\Common\Cache\CacheProvider
{
    const CACHE = 'cache';
    /**
     * Fetches an entry from the cache.
     *
     * @param string $id The id of the cache entry to fetch.
     *
     * @return mixed|false The cached data or FALSE, if no cache entry exists for the given id.
     */
    protected function doFetch( $id )
    {
                //i always land here !!!!?
        return Cache::get($id, self::CACHE);
    }

    /**
     * Tests if an entry exists in the cache.
     *
     * @param string $id The cache id of the entry to check for.
     *
     * @return bool TRUE if a cache entry exists for the given cache id, FALSE otherwise.
     */
    protected function doContains( $id )
    {
        return Cache::exists($id, self::CACHE);
    }

    /**
     * Puts data into the cache.
     *
     * @param string $id The cache id.
     * @param string $data The cache entry/data.
     * @param int $lifeTime The lifetime. If != 0, sets a specific lifetime for this
     *                           cache entry (0 => infinite lifeTime).
     *
     * @return bool TRUE if the entry was successfully stored in the cache, FALSE otherwise.
     */
    protected function doSave( $id, $data, $lifeTime = 0 )
    {
        return Cache::set($id, $data, $lifeTime, self::CACHE);
    }

    /**
     * Deletes a cache entry.
     *
     * @param string $id The cache id.
     *
     * @return bool TRUE if the cache entry was successfully deleted, FALSE otherwise.
     */
    protected function doDelete( $id )
    {
        return Cache::delete($id, self::CACHE);
    }

    /**
     * Flushes all cache entries.
     *
     * @return bool TRUE if the cache entries were successfully flushed, FALSE otherwise.
     */
    protected function doFlush()
    {
        return Cache::flush(self::CACHE);
    }

    /**
     * Retrieves cached information from the data store.
     *
     * @since 2.2
     *
     * @return array|null An associative array with server's statistics if available, NULL otherwise.
     */
    protected function doGetStats()
    {
        return Cache::getStats(self::CACHE);
        // TODO: Implement doGetStats() method.
    }

    protected function doFetchMultiple( array $keys )
    {
        return Cache::getMultiple($keys, self::CACHE);
    }