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<?php |
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/** |
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* Src/Cache/Storage/AbstractStorage.php |
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* |
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* @package Ds\Cache\Storage |
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* @subpackage Cache |
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* @author Dan Smith <[email protected]> |
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* @version v.1 (20/03/2017) |
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* @copyright Copyright (c) 2017, Dan Smith |
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*/ |
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namespace Ds\Cache\Storage; |
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use DateInterval; |
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use DateTime; |
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use Ds\Cache\CacheStorageInterface; |
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/** |
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* Class MemcacheStorage |
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* |
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* @package Ds\Cache\Storage |
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*/ |
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abstract class AbstractStorage implements CacheStorageInterface |
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{ |
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/** |
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* @var DateInterval |
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*/ |
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private $ttl; |
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/** |
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* Abstract Storage constructor. |
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* @param DateInterval $ttl |
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*/ |
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public function __construct(DateInterval $ttl) |
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{ |
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$this->ttl = $ttl; |
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} |
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/** |
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* With default ttl. |
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* |
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* @param DateInterval $ttl |
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* @return CacheStorageInterface |
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*/ |
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public function withTtl(DateInterval $ttl){ |
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$new = clone $this; |
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$new->ttl = $ttl; |
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return $new; |
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} |
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/** |
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* Get ttl as integer. |
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* |
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* @param null|int $ttl |
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* @return int |
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*/ |
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public function getTtlTimestamp($ttl = null){ |
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if (null === $ttl){ |
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$dateTime = new DateTime(); |
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$dateTime->add( $this->ttl ); |
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$ttl = $dateTime->getTimestamp(); |
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} |
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return (int)$ttl; |
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} |
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/** |
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* Get ttl as integer. |
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* |
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* @return DateInterval |
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*/ |
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public function getTtl(){ |
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return $this->ttl; |
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} |
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/** |
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* Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time. |
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* |
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* @param string $key The key of the item to store. |
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* @param mixed $value The value of the item to store, must be serializable. |
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* @param null|int $ttl Optional. The TTL value of this item. If no value is sent and |
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* the driver supports TTL then the library may set a default value |
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* for it or let the driver take care of that. |
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* |
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* @return bool True on success and false on failure. |
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*/ |
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abstract public function set($key, $value, $ttl = null); |
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/** |
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* Determines whether an item is present in the cache. |
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* |
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* NOTE: It is recommended that has() is only to be used for cache warming type purposes |
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* and not to be used within your live applications operations for get/set, as this method |
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* is subject to a race condition where your has() will return true and immediately after, |
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* another script can remove it making the state of your app out of date. |
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* |
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* @param string $key The cache item key. |
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* |
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* @return bool |
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*/ |
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abstract public function has($key); |
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/** |
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* Fetches a value from the cache. |
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* |
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* @param string $key The unique key of this item in the cache. |
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* |
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* @return mixed The value of the item from the cache, or $default in case of cache miss. |
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* |
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*/ |
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abstract public function get($key); |
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/** |
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* Delete an item from the cache by its unique key. |
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* |
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* @param string $key The unique cache key of the item to delete. |
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* |
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* @return bool True if the item was successfully removed. False if there was an error. |
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*/ |
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abstract public function delete($key); |
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/** |
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* Wipes clean the entire cache's keys. |
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* |
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* @return bool True on success and false on failure. |
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*/ |
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abstract public function clear(); |
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} |
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djsmithme /
Cache
