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<?php |
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declare(strict_types = 1); |
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namespace Mikemirten\Component\JsonApi\Mapper\Definition; |
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use Psr\SimpleCache\CacheInterface; |
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/** |
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* Caching decorator for a definition provider using PSR-16 compatible cache. |
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* |
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* @see http://www.php-fig.org/psr/psr-16/ |
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* |
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* @package Mikemirten\Component\JsonApi\Mapper\Definition |
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*/ |
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class CachedProvider implements DefinitionProviderInterface |
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{ |
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const PREFIX = 'json_api_mapper.'; |
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/** |
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* Delegated provider |
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* |
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* @var DefinitionProviderInterface |
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*/ |
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protected $provider; |
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/** |
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* PSR-16 Compatible cache |
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* |
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* @var CacheInterface |
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*/ |
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protected $cache; |
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/** |
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* Locally cached definitions |
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* |
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* @var Definition[] |
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*/ |
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protected $definitions = []; |
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/** |
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* CachedProvider constructor. |
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* |
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* @param DefinitionProviderInterface $provider |
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* @param CacheInterface $cache |
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*/ |
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public function __construct(DefinitionProviderInterface $provider, CacheInterface $cache) |
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{ |
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$this->provider = $provider; |
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$this->cache = $cache; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getDefinition(string $class): Definition |
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{ |
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if (! isset($this->definitions[$class])) { |
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$this->definitions[$class] = $this->provideDefinition($class); |
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} |
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return $this->definitions[$class]; |
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} |
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/** |
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* Provide definition: try cache or get from provider |
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* |
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* @param string $class |
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* @return Definition |
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*/ |
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public function provideDefinition(string $class): Definition |
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{ |
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$key = self::PREFIX . md5($class); |
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$data = $this->cache->get($key); |
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if ($data !== null) { |
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return unserialize($data); |
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} |
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$definition = $this->provider->getDefinition($class); |
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$this->cache->set($key, serialize($definition)); |
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return $definition; |
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} |
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} |