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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\cache\driver;
if (!defined('PHPBB_ACM_MEMCACHED_PORT'))
{
define('PHPBB_ACM_MEMCACHED_PORT', 11211);
}
if (!defined('PHPBB_ACM_MEMCACHED_COMPRESS'))
{
define('PHPBB_ACM_MEMCACHED_COMPRESS', true);
}
if (!defined('PHPBB_ACM_MEMCACHED_HOST'))
{
define('PHPBB_ACM_MEMCACHED_HOST', 'localhost');
}
if (!defined('PHPBB_ACM_MEMCACHED'))
{
//can define multiple servers with host1/port1,host2/port2 format
define('PHPBB_ACM_MEMCACHED', PHPBB_ACM_MEMCACHED_HOST . '/' . PHPBB_ACM_MEMCACHED_PORT);
}
/**
* ACM for Memcached
*/
class memcached extends \phpbb\cache\driver\memory
{
/** @var string Extension to use */
protected $extension = 'memcached';
/** @var \Memcached Memcached class */
protected $memcached;
/** @var int Flags */
protected $flags = 0;
/**
* Memcached constructor
*
* @param string $memcached_servers Memcached servers string (optional)
*/
public function __construct($memcached_servers = '')
{
// Call the parent constructor
parent::__construct();
$memcached_servers = $memcached_servers ?: PHPBB_ACM_MEMCACHED;
$this->memcached = new \Memcached();
$this->memcached->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
// Memcached defaults to using compression, disable if we don't want
// to use it
if (!PHPBB_ACM_MEMCACHED_COMPRESS)
{
$this->memcached->setOption(\Memcached::OPT_COMPRESSION, false);
}
$server_list = [];
foreach (explode(',', $memcached_servers) as $u)
{
if (preg_match('#(.*)/(\d+)#', $u, $parts))
{
$server_list[] = [trim($parts[1]), (int) trim($parts[2])];
}
}
$this->memcached->addServers($server_list);
if (empty($server_list) || empty($this->memcached->getStats()))
{
trigger_error('Could not connect to memcached server(s).');
}
}
/**
* {@inheritDoc}
*/
public function unload()
{
parent::unload();
unset($this->memcached);
}
/**
* {@inheritDoc}
*/
public function purge()
{
$this->memcached->flush();
parent::purge();
}
/**
* Fetch an item from the cache
*
* @param string $var Cache key
*
* @return mixed Cached data
*/
protected function _read($var)
{
return $this->memcached->get($this->key_prefix . $var);
}
/**
* Store data in the cache
*
* @param string $var Cache key
* @param mixed $data Data to store
* @param int $ttl Time-to-live of cached data
* @return bool True if the operation succeeded
*/
protected function _write($var, $data, $ttl = 2592000)
{
if (!$this->memcached->replace($this->key_prefix . $var, $data, $ttl))
{
return $this->memcached->set($this->key_prefix . $var, $data, $ttl);
}
return true;
}
/**
* Remove an item from the cache
*
* @param string $var Cache key
* @return bool True if the operation succeeded
*/
protected function _delete($var)
{
return $this->memcached->delete($this->key_prefix . $var);
}
}
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