public function CachedStorage::readMultiple in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Config/CachedStorage.php \Drupal\Core\Config\CachedStorage::readMultiple()

Reads configuration data from the storage.

Parameters

array $names: List of names of the configuration objects to load.

Return value

array A list of the configuration data stored for the configuration object name that could be loaded for the passed list of names.

Overrides StorageInterface::readMultiple

File

core/lib/Drupal/Core/Config/CachedStorage.php, line 82

Class

CachedStorage

Defines the cached storage.

Namespace

Drupal\Core\Config

Code

public function readMultiple(array $names) {
  $data_to_return = [];
  $cache_keys_map = $this
    ->getCacheKeys($names);
  $cache_keys = array_values($cache_keys_map);
  $cached_list = $this->cache
    ->getMultiple($cache_keys);
  if (!empty($cache_keys)) {

    // $cache_keys_map contains the full $name => $cache_key map, while
    // $cache_keys contains just the $cache_key values that weren't found in
    // the cache.
    // @see \Drupal\Core\Cache\CacheBackendInterface::getMultiple()
    $names_to_get = array_keys(array_intersect($cache_keys_map, $cache_keys));
    $list = $this->storage
      ->readMultiple($names_to_get);

    // Cache configuration objects that were loaded from the storage, cache
    // missing configuration objects as an explicit FALSE.
    $items = [];
    foreach ($names_to_get as $name) {
      $data = isset($list[$name]) ? $list[$name] : FALSE;
      $data_to_return[$name] = $data;
      $items[$cache_keys_map[$name]] = [
        'data' => $data,
      ];
    }
    $this->cache
      ->setMultiple($items);
  }

  // Add the configuration objects from the cache to the list.
  $cache_keys_inverse_map = array_flip($cache_keys_map);
  foreach ($cached_list as $cache_key => $cache) {
    $name = $cache_keys_inverse_map[$cache_key];
    $data_to_return[$name] = $cache->data;
  }

  // Ensure that only existing configuration objects are returned, filter out
  // cached information about missing objects.
  return array_filter($data_to_return);
}