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