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<?php |
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namespace NilPortugues\Cache\Adapter; |
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use NilPortugues\Cache\Adapter\Memcached\Memcached; |
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use NilPortugues\Cache\CacheAdapter; |
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/** |
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* Class MemcachedAdapter |
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* @package NilPortugues\Cache\Adapter |
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*/ |
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class MemcachedAdapter extends Adapter implements CacheAdapter |
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{ |
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/** |
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* @var Memcached |
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*/ |
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protected $memcached; |
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/** |
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* @param string $persistentId |
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* @param array $connections |
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* @param CacheAdapter $next |
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*/ |
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public function __construct($persistentId, array $connections, CacheAdapter $next = null) |
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{ |
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$this->memcached = $this->getMemcachedClient($persistentId, \array_unique(\array_values($connections))); |
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$this->nextAdapter = (InMemoryAdapter::getInstance() === $next) ? null : $next; |
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} |
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/** |
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* @param string $persistentId |
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* @param array $connections |
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* |
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* @codeCoverageIgnore |
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* @return Memcached |
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*/ |
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protected function getMemcachedClient($persistentId, array $connections) |
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{ |
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return new Memcached($persistentId, $connections); |
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} |
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/** |
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* Get a value identified by $key. |
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* |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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public function get($key) |
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{ |
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$this->hit = false; |
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$inMemoryValue = InMemoryAdapter::getInstance()->get($key); |
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if (InMemoryAdapter::getInstance()->isHit()) { |
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$this->hit = true; |
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return $inMemoryValue; |
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} |
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$value = $this->memcached->get($key); |
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if ($value) { |
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$this->hit = true; |
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InMemoryAdapter::getInstance()->set($key, $value, 0); |
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return $value; |
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} |
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return (null !== $this->nextAdapter) ? $this->nextAdapter->get($key) : null; |
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} |
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/** |
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* Set a value identified by $key and with an optional $ttl. |
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* |
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* @param string $key |
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* @param mixed $value |
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* @param int $ttl |
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* |
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* @return $this |
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*/ |
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public function set($key, $value, $ttl = 0) |
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{ |
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$ttl = $this->fromDefaultTtl($ttl); |
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if ($ttl >= 0) { |
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$this->memcached->set($key, $value); |
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if ($ttl > 0) { |
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$this->memcached->touch($key, \time() + $ttl); |
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} |
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$this->setChain($key, $value, $ttl); |
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} |
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return $this; |
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} |
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/** |
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* Delete a value identified by $key. |
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* |
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* @param string $key |
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*/ |
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public function delete($key) |
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{ |
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$this->memcached->delete($key); |
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$this->deleteChain($key); |
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} |
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/** |
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* Checks the availability of the cache service. |
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* |
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* @return bool |
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*/ |
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public function isAvailable() |
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{ |
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$stats = $this->memcached->getStats(); |
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return false === empty($stats); |
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} |
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/** |
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* Clears all expired values from cache. |
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* |
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* @return mixed |
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*/ |
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public function clear() |
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{ |
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$this->clearChain(); |
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} |
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/** |
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* Clears all values from the cache. |
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* |
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* @return mixed |
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*/ |
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public function drop() |
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{ |
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$this->memcached->flush(); |
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$this->dropChain(); |
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} |
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} |
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nilportugues /
cache
