<?php /* * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * This software consists of voluntary contributions made by many individuals * and is licensed under the MIT license. For more information, see * <http://www.doctrine-project.org>. */ namespace Doctrine\Common\Cache; use \Memcache; /** * Memcache cache provider. * * @link www.doctrine-project.org * @since 2.0 * @author Benjamin Eberlei <kontakt@beberlei.de> * @author Guilherme Blanco <guilhermeblanco@hotmail.com> * @author Jonathan Wage <jonwage@gmail.com> * @author Roman Borschel <roman@code-factory.org> * @author David Abdemoulaie <dave@hobodave.com> */ class MemcacheCache extends CacheProvider { /** * @var Memcache|null */ private $memcache; /** * Sets the memcache instance to use. * * @param Memcache $memcache * * @return void */ public function setMemcache(Memcache $memcache) { $this->memcache = $memcache; } /** * Gets the memcache instance used by the cache. * * @return Memcache|null */ public function getMemcache() { return $this->memcache; } /** * {@inheritdoc} */ protected function doFetch($id) { return $this->memcache->get($id); } /** * {@inheritdoc} */ protected function doContains($id) { $flags = null; $this->memcache->get($id, $flags); //if memcache has changed the value of "flags", it means the value exists return ($flags !== null); } /** * {@inheritdoc} */ protected function doSave($id, $data, $lifeTime = 0) { if ($lifeTime > 30 * 24 * 3600) { $lifeTime = time() + $lifeTime; } return $this->memcache->set($id, $data, 0, (int) $lifeTime); } /** * {@inheritdoc} */ protected function doDelete($id) { // Memcache::delete() returns false if entry does not exist return $this->memcache->delete($id) || ! $this->doContains($id); } /** * {@inheritdoc} */ protected function doFlush() { return $this->memcache->flush(); } /** * {@inheritdoc} */ protected function doGetStats() { $stats = $this->memcache->getStats(); return array( Cache::STATS_HITS => $stats['get_hits'], Cache::STATS_MISSES => $stats['get_misses'], Cache::STATS_UPTIME => $stats['uptime'], Cache::STATS_MEMORY_USAGE => $stats['bytes'], Cache::STATS_MEMORY_AVAILABLE => $stats['limit_maxbytes'], ); } }