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<?php |
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namespace Onoi\Cache; |
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use BagOStuff; |
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/** |
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* MediaWiki BagOStuff decorator |
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* |
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* @license GNU GPL v2+ |
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* @since 1.0 |
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* |
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* @author mwjames |
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*/ |
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class MediaWikiCache implements Cache { |
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/** |
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* @var BagOStuff |
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*/ |
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private $cache = null; |
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/** |
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* @note MediaWiki's BagOStuff doesn't know any has/contains function therefore |
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* we need to use an internal array the fetch and temporarily store the results |
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* to ensure no expensive lookups occur for the same key |
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* |
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* @var array |
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*/ |
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private $inMemoryCache = array(); |
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/** |
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* @var integer |
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*/ |
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private $cacheInserts = 0; |
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/** |
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* @var integer |
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*/ |
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private $cacheDeletes = 0; |
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/** |
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* @var integer |
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*/ |
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private $cacheHits = 0; |
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/** |
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* @var integer |
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*/ |
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private $cacheMisses = 0; |
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/** |
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* @since 1.0 |
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* |
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* @param BagOStuff $cache |
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*/ |
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public function __construct( BagOStuff $cache ) { |
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$this->cache = $cache; |
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} |
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/** |
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* @since 1.0 |
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* |
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* {@inheritDoc} |
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*/ |
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public function fetch( $id ) { |
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if ( $this->contains( $id ) ) { |
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$this->cacheHits++; |
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return $this->inMemoryCache[ $id ]; |
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} |
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$this->cacheMisses++; |
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return false; |
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} |
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/** |
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* @since 1.0 |
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* |
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* {@inheritDoc} |
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*/ |
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public function contains( $id ) { |
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if ( isset ( $this->inMemoryCache[ $id ] ) || array_key_exists( $id, $this->inMemoryCache ) ) { |
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return true; |
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} |
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$this->inMemoryCache[ $id ] = $this->cache->get( $id ); |
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return !$this->inMemoryCache[ $id ] ? false : true; |
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} |
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/** |
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* @since 1.0 |
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* |
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* {@inheritDoc} |
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*/ |
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public function save( $id, $data, $ttl = 0 ) { |
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$this->cacheInserts++; |
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$this->cache->set( $id, $data, $ttl ); |
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unset( $this->inMemoryCache[ $id ] ); |
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} |
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/** |
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* @since 1.0 |
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* |
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* {@inheritDoc} |
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*/ |
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public function delete( $id ) { |
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$this->cacheDeletes++; |
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$this->cache->delete( $id ); |
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unset( $this->inMemoryCache[ $id ] ); |
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} |
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/** |
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* @since 1.0 |
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* |
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* {@inheritDoc} |
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*/ |
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public function getStats() { |
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return array( |
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'inserts' => $this->cacheInserts, |
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'deletes' => $this->cacheDeletes, |
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'hits' => $this->cacheHits, |
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'misses' => $this->cacheMisses |
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); |
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} |
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/** |
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* @since 1.2 |
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* |
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* {@inheritDoc} |
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*/ |
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1 |
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public function getName() { |
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return __CLASS__ . '::' . get_class( $this->cache ); |
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} |
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} |
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onoi /
cache
