trait UseCacheBackendTrait (View source)

Provides methods to use a cache backend while respecting a 'use caches' flag.

Properties

protected CacheBackendInterface $cacheBackend

Cache backend instance.

protected bool $useCaches

Flag whether caches should be used or skipped.

Methods

object|false
cacheGet(string $cid)

Fetches from the cache backend, respecting the use caches flag.

cacheSet(string $cid, mixed $data, int $expire = Cache::PERMANENT, array $tags = [])

Stores data in the persistent cache, respecting the use caches flag.

Details

protected object|false cacheGet(string $cid)

Fetches from the cache backend, respecting the use caches flag.

Parameters

string $cid

The cache ID of the data to retrieve.

Return Value

object|false

The cache item or FALSE on failure.

See also

CacheBackendInterface::get

protected cacheSet(string $cid, mixed $data, int $expire = Cache::PERMANENT, array $tags = [])

Stores data in the persistent cache, respecting the use caches flag.

Parameters

string $cid

The cache ID of the data to store.

mixed $data

The data to store in the cache. Some storage engines only allow objects up to a maximum of 1MB in size to be stored by default. When caching large arrays or similar, take care to ensure $data does not exceed this size.

int $expire

One of the following values:

  • CacheBackendInterface::CACHE_PERMANENT: Indicates that the item should not be removed unless it is deleted explicitly.
  • A Unix timestamp: Indicates that the item will be considered invalid after this time, i.e. it will not be returned by get() unless $allow_invalid has been set to TRUE. When the item has expired, it may be permanently deleted by the garbage collector at any time.
array $tags

An array of tags to be stored with the cache item. These should normally identify objects used to build the cache item, which should trigger cache invalidation when updated. For example if a cached item represents a node, both the node ID and the author's user ID might be passed in as tags. For example array('node' => array(123), 'user' => array(92)).

See also

CacheBackendInterface::set