class BlockContentUuidLookup in Drupal 8

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

• class \Drupal\Core\Cache\CacheCollector implements CacheCollectorInterface, DestructableInterface
  • class \Drupal\block_content\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

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

Namespace

Drupal\block_content

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

Name	Modifiers	Type	Description	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