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<?php |
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namespace Cmp\Cache\Backend; |
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use Cmp\Cache\Cache; |
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use Cmp\Cache\Exceptions\CacheException; |
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use Cmp\Cache\Exceptions\ExpiredException; |
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use Cmp\Cache\Exceptions\NotFoundException; |
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use Cmp\Cache\FlushableCache; |
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use Cmp\Cache\PurgableCache; |
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use Cmp\Cache\Traits\MultiCacheTrait; |
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/** |
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* Class ArrayCache |
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* |
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* A simple backend powered by an array in memory |
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* |
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* @package Cmp\Cache\Infrastureture\Backend |
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*/ |
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class ArrayCache extends TaggableCache |
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{ |
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use MultiCacheTrait; |
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/** |
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* Stored items |
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* |
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* @var array |
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*/ |
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private $items = []; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function set($key, $value, $timeToLive = null) |
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{ |
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$this->items[$key] = [ |
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'value' => $value, |
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'expireTime' => $timeToLive === null || $timeToLive === 0 ? null : time() + $timeToLive, |
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]; |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function has($key) |
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{ |
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if (!array_key_exists($key, $this->items)) { |
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return false; |
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} |
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if ($this->hasExpired($key)) { |
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$this->delete($key); |
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return false; |
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} |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function get($key, $default = null) |
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{ |
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try { |
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return $this->demand($key); |
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} catch (CacheException $exception) { |
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return $default; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function demand($key) |
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{ |
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if (!array_key_exists($key, $this->items)) { |
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throw new NotFoundException($key); |
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} |
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if ($this->hasExpired($key)) { |
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$this->delete($key); |
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throw new ExpiredException($key); |
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} |
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return $this->items[$key]['value']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function delete($key) |
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{ |
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if (array_key_exists($key, $this->items)) { |
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unset($this->items[$key]); |
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} |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function flush() |
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{ |
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$this->items = []; |
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return true; |
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} |
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/** |
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* Checks whether an item as expired |
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* |
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* @param string $key |
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* |
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* @return bool |
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*/ |
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private function hasExpired($key) |
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{ |
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return $this->items[$key]['expireTime'] !== null && $this->items[$key]['expireTime'] < time(); |
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} |
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/** |
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* Gets the remaining time to live for an item |
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* |
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* @param $key |
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* |
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* @return int|null |
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*/ |
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1 |
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public function getTimeToLive($key) |
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{ |
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1 |
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if (!$this->has($key)) { |
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return null; |
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} |
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return !$this->items[$key]['expireTime'] ? null : $this->items[$key]['expireTime'] - time(); |
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} |
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} |
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CMProductions /
cache
