interface CacheTagsChecksumInterface

Provides checksums for cache tag invalidations.

Cache backends can use this to check if any cache tag invalidations happened for a stored cache item.

To do so, they can inject the cache_tags.invalidator.checksum service, and when a cache item is written, store cache tags together with the current checksum, calculated by getCurrentChecksum(). When a cache item is fetched, the checksum can be validated with isValid(). The service will return FALSE if any of those cache tags were invalidated in the meantime.

Hierarchy

• interface \Drupal\Core\Cache\CacheTagsChecksumInterface

Related topics

Cache API

Information about the Drupal Cache API

File

core/lib/Drupal/Core/Cache/CacheTagsChecksumInterface.php, line 19

Namespace

Drupal\Core\Cache

Members

Name	Modifiers	Type	Description
CacheTagsChecksumInterface::getCurrentChecksum	public	function	Returns the sum total of validations for a given set of tags.
CacheTagsChecksumInterface::isValid	public	function	Returns whether the checksum is valid for the given cache tags.
CacheTagsChecksumInterface::reset	public	function	Reset statically cached tags.