Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
namespace Friendica\Core\Cache;
use Friendica\BaseObject;
use Friendica\Core\Cache;
/**
* Memcache Cache Driver
*
* @author Hypolite Petovan <mrpetovan@gmail.com>
*/
class MemcacheCacheDriver extends BaseObject implements ICacheDriver
{
/**
* @var Memcache
*/
private $memcache;
public function __construct($memcache_host, $memcache_port)
{
if (!class_exists('Memcache', false)) {
throw new \Exception('Memcache class isn\'t available');
}
$this->memcache = new \Memcache();
if (!$this->memcache->connect($memcache_host, $memcache_port)) {
throw new \Exception('Expected Memcache server at ' . $memcache_host . ':' . $memcache_port . ' isn\'t available');
}
}
public function get($key)
{
$return = null;
// We fetch with the hostname as key to avoid problems with other applications
$cached = $this->memcache->get(self::getApp()->get_hostname() . ':' . $key);
// @see http://php.net/manual/en/memcache.get.php#84275
if (is_bool($cached) || is_double($cached) || is_long($cached)) {
return $return;
}
$value = @unserialize($cached);
// Only return a value if the serialized value is valid.
// We also check if the db entry is a serialized
// boolean 'false' value (which we want to return).
if ($cached === serialize(false) || $value !== false) {
$return = $value;
}
return $return;
}
public function set($key, $value, $duration = Cache::MONTH)
{
// We store with the hostname as key to avoid problems with other applications
return $this->memcache->set(
self::getApp()->get_hostname() . ":" . $key,
serialize($value),
MEMCACHE_COMPRESSED,
time() + $duration
);
}
public function delete($key)
{
return $this->memcache->delete($key);
}
public function clear()
{
return true;
}
}