class BlockContentUuidLookup

A cache collector that caches IDs for block_content UUIDs.

As block_content entities are used as block plugin derivatives, it is a fairly safe limitation that there are not hundreds of them, a site will likely run into problems with too many block content entities in other places than a cache that only stores UUID's and IDs. The same assumption is not true for other content entities.

@internal

Hierarchy

Expanded class hierarchy of BlockContentUuidLookup

1 file declares its use of BlockContentUuidLookup
BlockContentBlock.php in core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
1 string reference to 'BlockContentUuidLookup'
block_content.services.yml in core/modules/block_content/block_content.services.yml
core/modules/block_content/block_content.services.yml
1 service uses BlockContentUuidLookup
block_content.uuid_lookup in core/modules/block_content/block_content.services.yml
\Drupal\block_content\BlockContentUuidLookup

File

View on git.drupalcode.org

core/modules/block_content/src/BlockContentUuidLookup.php, line 21

Namespace

Drupal\block_content
View source 
class BlockContentUuidLookup extends CacheCollector {
  
  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;
  
  /**
   * Constructs a BlockContentUuidLookup instance.
   *
   * @param \Drupal\Core\Cache\CacheBackendInterface $cache
   *   The cache backend.
   * @param \Drupal\Core\Lock\LockBackendInterface $lock
   *   The lock backend.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   */
  public function __construct(CacheBackendInterface $cache, LockBackendInterface $lock, EntityTypeManagerInterface $entity_type_manager) {
    parent::__construct('block_content_uuid', $cache, $lock);
    $this->entityTypeManager = $entity_type_manager;
  }
  
  /**
   * {@inheritdoc}
   */
  protected function resolveCacheMiss($key) {
    $ids = $this->entityTypeManager
      ->getStorage('block_content')
      ->getQuery()
      ->condition('uuid', $key)
      ->execute();
    // Only cache if there is a match, otherwise creating new entities would
    // require to invalidate the cache.
    $id = reset($ids);
    if ($id) {
      $this->storage[$key] = $id;
      $this->persist($key);
    }
    return $id;
  }

}

Members

Title Modifiers Object type Summary Overriden Title Overrides
BlockContentUuidLookup::$entityTypeManager protected property The entity type manager.
BlockContentUuidLookup::resolveCacheMiss protected function Resolves a cache miss. Overrides CacheCollector::resolveCacheMiss
BlockContentUuidLookup::__construct public function Constructs a BlockContentUuidLookup instance. Overrides CacheCollector::__construct
CacheCollector::$cache protected property The cache backend that should be used. 1
CacheCollector::$cacheCreated protected property Stores the cache creation time.
CacheCollector::$cacheInvalidated protected property Flag that indicates of the cache has been invalidated.
CacheCollector::$cacheLoaded protected property Indicates if the collected cache was already loaded.
CacheCollector::$cid protected property The cache id that is used for the cache entry.
CacheCollector::$keysToPersist protected property An array of keys to add to the cache on service termination.
CacheCollector::$keysToRemove protected property An array of keys to remove from the cache on service termination.
CacheCollector::$lock protected property The lock backend that should be used. 1
CacheCollector::$storage protected property Storage for the data itself.
CacheCollector::$tags protected property A list of tags that are used for the cache entry.
CacheCollector::clear public function Clears the collected cache entry. Overrides CacheCollectorInterface::clear 1
CacheCollector::delete public function Deletes the element. Overrides CacheCollectorInterface::delete
CacheCollector::destruct public function Performs destruct operations. Overrides DestructableInterface::destruct
CacheCollector::get public function Gets value from the cache. Overrides CacheCollectorInterface::get 2
CacheCollector::getCid protected function Gets the cache ID. 3
CacheCollector::has public function Returns whether data exists for this key. Overrides CacheCollectorInterface::has 1
CacheCollector::invalidateCache protected function Invalidate the cache.
CacheCollector::lazyLoadCache protected function Loads the cache if not already done. 1
CacheCollector::normalizeLockName protected function Normalizes a cache ID in order to comply with database limitations.
CacheCollector::persist protected function Flags an offset value to be written to the persistent cache.
CacheCollector::reset public function Resets the local cache. Overrides CacheCollectorInterface::reset 1
CacheCollector::set public function Implements \Drupal\Core\Cache\CacheCollectorInterface::set(). Overrides CacheCollectorInterface::set 1
CacheCollector::updateCache protected function Writes a value to the persistent cache immediately. 1

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