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13 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
15 * This software consists of voluntary contributions made by many individuals
16 * and is licensed under the MIT license. For more information, see
17 * <http://www.doctrine-project.org>.
20 namespace Doctrine\Common\Cache;
25 * Memcache cache provider.
27 * @link www.doctrine-project.org
29 * @author Benjamin Eberlei <kontakt@beberlei.de>
30 * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
31 * @author Jonathan Wage <jonwage@gmail.com>
32 * @author Roman Borschel <roman@code-factory.org>
33 * @author David Abdemoulaie <dave@hobodave.com>
35 class MemcacheCache extends CacheProvider
43 * Sets the memcache instance to use.
45 * @param Memcache $memcache
49 public function setMemcache(Memcache $memcache)
51 $this->memcache = $memcache;
55 * Gets the memcache instance used by the cache.
57 * @return Memcache|null
59 public function getMemcache()
61 return $this->memcache;
67 protected function doFetch($id)
69 return $this->memcache->get($id);
75 protected function doContains($id)
78 $this->memcache->get($id, $flags);
80 //if memcache has changed the value of "flags", it means the value exists
81 return ($flags !== null);
87 protected function doSave($id, $data, $lifeTime = 0)
89 if ($lifeTime > 30 * 24 * 3600) {
90 $lifeTime = time() + $lifeTime;
92 return $this->memcache->set($id, $data, 0, (int) $lifeTime);
98 protected function doDelete($id)
100 // Memcache::delete() returns false if entry does not exist
101 return $this->memcache->delete($id) || ! $this->doContains($id);
107 protected function doFlush()
109 return $this->memcache->flush();
115 protected function doGetStats()
117 $stats = $this->memcache->getStats();
119 Cache::STATS_HITS => $stats['get_hits'],
120 Cache::STATS_MISSES => $stats['get_misses'],
121 Cache::STATS_UPTIME => $stats['uptime'],
122 Cache::STATS_MEMORY_USAGE => $stats['bytes'],
123 Cache::STATS_MEMORY_AVAILABLE => $stats['limit_maxbytes'],