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<?php |
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namespace Ubiquity\cache\system; |
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use Ubiquity\cache\CacheFile; |
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use Ubiquity\exceptions\CacheException; |
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/** |
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* This class is responsible for storing values with MemCached. |
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* Ubiquity\cache\system$MemCachedDriver |
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* This class is part of Ubiquity |
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* |
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* @author jcheron <[email protected]> |
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* @version 1.0.3 |
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* |
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*/ |
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class MemCachedDriver extends AbstractDataCache { |
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/** |
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* |
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* @var \Memcached |
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*/ |
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private $cacheInstance; |
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private const CONTENT = 'content'; |
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private const TAG = 'tag'; |
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private const TIME = 'time'; |
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/** |
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* Initializes the cache-provider |
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*/ |
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public function __construct($root, $postfix = "", $cacheParams = [ ]) { |
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parent::__construct ( $root, $postfix ); |
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$defaultParams = [ 'servers' => [ [ 'host' => '0.0.0.0','port' => 11211 ] ],'serializer' => \Memcached::SERIALIZER_PHP,'persistent' => true ]; |
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$cacheParams = \array_merge ( $defaultParams, $cacheParams ); |
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$this->cacheInstance = new \Memcached ( $cacheParams ['persistent'] ? \crc32 ( $root ) : null ); |
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if (isset ( $cacheParams ['serializer'] )) { |
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$this->cacheInstance->setOption ( \Memcached::OPT_SERIALIZER, $cacheParams ['serializer'] ); |
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} |
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if ($this->cacheInstance->isPristine ()) { |
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$this->addServers ( $cacheParams ['servers'] ); |
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} |
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} |
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public function addServer($host, $port, $weight = null) { |
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$this->cacheInstance->addServer ( $host, $port, $weight ); |
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$statuses = $this->cacheInstance->getStats (); |
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if (! isset ( $statuses ["$host:$port"] )) { |
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throw new CacheException ( "Connection to the server $host:$port failed!" ); |
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} |
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} |
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public function addServers(array $servers) { |
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foreach ( $servers as $srv ) { |
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$this->addServer ( $srv ['host'] ?? '0.0.0.0', $srv ['port'] ?? 11211, $srv ['weight'] ?? null); |
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} |
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} |
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public function setSerializer($serializer) { |
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$this->cacheInstance->setOption ( \Memcached::OPT_SERIALIZER, $serializer ); |
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} |
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/** |
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* Check if annotation-data for the key has been stored. |
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* |
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* @param string $key cache key |
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* @return boolean true if data with the given key has been stored; otherwise false |
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*/ |
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public function exists($key) { |
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$k = $this->getRealKey ( $key ); |
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$this->cacheInstance->get ( $k ); |
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return \Memcached::RES_NOTFOUND !== $this->cacheInstance->getResultCode (); |
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} |
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public function store($key, $content, $tag = null) { |
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$this->cacheInstance->set ( $this->getRealKey ( $key ), [ self::CONTENT => $content,self::TAG => $tag,self::TIME => \time () ] ); |
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} |
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protected function getRealKey($key) { |
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return \crc32 ( $key ); |
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} |
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/** |
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* Fetches data stored for the given key. |
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* |
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* @param string $key cache key |
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* @return mixed the cached data |
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*/ |
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public function fetch($key) { |
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$entry = $this->cacheInstance->get ( $this->getRealKey ( $key ) ); |
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return $entry [self::CONTENT] ?? false; |
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} |
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/** |
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* return data stored for the given key. |
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* |
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* @param string $key cache key |
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* @return mixed the cached data |
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*/ |
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public function file_get_contents($key) { |
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return $this->cacheInstance->get ( $this->getRealKey ( $key ) ) [self::CONTENT]; |
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} |
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/** |
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* Returns the timestamp of the last cache update for the given key. |
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* |
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* @param string $key cache key |
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* @return int unix timestamp |
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*/ |
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public function getTimestamp($key) { |
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$key = $this->getRealKey ( $key ); |
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return $this->cacheInstance->get ( $key ) [self::TIME]; |
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} |
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public function remove($key) { |
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$key = $this->getRealKey ( $key ); |
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$this->cacheInstance->delete ( $this->getRealKey ( $key ) ); |
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} |
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public function clear() { |
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$this->cacheInstance->flush (); |
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} |
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public function getCacheFiles($type) { |
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$result = [ ]; |
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$keys = $this->cacheInstance->getAllKeys (); |
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foreach ( $keys as $key ) { |
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$entry = $this->cacheInstance->get ( $key ); |
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if ($entry [self::TAG] === $type) { |
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$result [] = new CacheFile ( \ucfirst ( $type ), $key, $entry [self::TIME], "", $key ); |
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} |
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} |
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if (\sizeof ( $result ) === 0) |
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$result [] = new CacheFile ( \ucfirst ( $type ), "", "", "" ); |
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return $result; |
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} |
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public function clearCache($type) { |
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$keys = $this->cacheInstance->getAllKeys (); |
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foreach ( $keys as $key ) { |
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$entry = $this->cacheInstance->get ( $key ); |
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if ($entry [self::TAG] === $type) { |
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$this->cacheInstance->delete ( $key ); |
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} |
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} |
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} |
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public function getCacheInfo() { |
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return parent::getCacheInfo () . "<br>Driver name : <b>" . \Memcached::class . "</b>"; |
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} |
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public function getEntryKey($key) { |
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return $this->getRealKey ( $key ); |
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} |
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} |
phpMv /
ubiquity
