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|
<?php
namespace Doctrine\Common\Cache;
use Memcache;
use function time;
/**
* Memcache cache provider.
*
* @deprecated
*
* @link www.doctrine-project.org
*/
class MemcacheCache extends CacheProvider
{
/** @var Memcache|null */
private $memcache;
/**
* Sets the memcache instance to use.
*
* @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 [
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'],
];
}
}
|
