mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-12-21 06:01:06 +01:00
120 lines
3.2 KiB
PHP
120 lines
3.2 KiB
PHP
<?php
|
|
/**
|
|
* eGroupWare API: Caching provider storing data in memcached via PHP's memcache extension
|
|
*
|
|
* @link http://www.egroupware.org
|
|
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
|
|
* @package api
|
|
* @subpackage cache
|
|
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
|
|
* @copyright (c) 2009 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
|
|
* @version $Id$
|
|
*/
|
|
|
|
/**
|
|
* Caching provider storing data in memcached via PHP's memcache extension
|
|
*
|
|
* The provider concats all $keys with '::' to get a single string.
|
|
*
|
|
* To use this provider set in your header.inc.php:
|
|
* $GLOBALS['egw_info']['server']['cache_provider_instance'] = array('egw_cache_memcache','localhost'[,'otherhost:port']);
|
|
* and optional also $GLOBALS['egw_info']['server']['cache_provider_tree'] (defaults to instance)
|
|
*
|
|
* You can set more then one server and specify a port, if it's not the default one 11211.
|
|
*/
|
|
class egw_cache_memcache implements egw_cache_provider
|
|
{
|
|
/**
|
|
* Instance of Memcache
|
|
*
|
|
* @var Memcache
|
|
*/
|
|
private $memcache;
|
|
|
|
/**
|
|
* Flags used to store content
|
|
*
|
|
*/
|
|
const STORE_FLAGS = MEMCACHE_COMPRESSED;
|
|
|
|
/**
|
|
* Constructor, eg. opens the connection to the backend
|
|
*
|
|
* @throws Exception if connection to backend could not be established
|
|
* @param array $params eg. array('localhost'[,'localhost:11211',...])
|
|
*/
|
|
function __construct(array $params)
|
|
{
|
|
check_load_extension('memcache',true);
|
|
$this->memcache = new Memcache();
|
|
|
|
if (!$params) $params = array('localhost'); // some reasonable default
|
|
|
|
$ok = false;
|
|
foreach($params as $host_port)
|
|
{
|
|
list($host,$port) = explode(':',$host_port);
|
|
if (!$port) $port = 11211; // default port
|
|
|
|
$ok = $this->memcache->addServer($host,$port) || $ok;
|
|
//error_log(__METHOD__."(".array2string($params).") memcache->addServer('$host',$port) = ".(int)$ok);
|
|
}
|
|
if (!$ok)
|
|
{
|
|
throw new Exception (__METHOD__.'('.array2string($params).") Can't open connection to any memcached server!");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Stores some data in the cache
|
|
*
|
|
* @param array $keys eg. array($level,$app,$location)
|
|
* @param mixed $data
|
|
* @param int $expiration=0
|
|
* @return boolean true on success, false on error
|
|
*/
|
|
function set(array $keys,$data,$expiration=0)
|
|
{
|
|
return $this->memcache->set(self::key($keys),serialize($data),self::STORE_FLAGS,$expiration);
|
|
}
|
|
|
|
/**
|
|
* Get some data from the cache
|
|
*
|
|
* @param array $keys eg. array($level,$app,$location)
|
|
* @return mixed data stored or NULL if not found in cache
|
|
*/
|
|
function get(array $keys)
|
|
{
|
|
if (($data = $this->memcache->get($key=self::key($keys))) === false)
|
|
{
|
|
//error_log(__METHOD__."(".array2string($keys).") key='$key' NOT found!");
|
|
return null;
|
|
}
|
|
//error_log(__METHOD__."(".array2string($keys).") key='$key' found ".bytes($data)." bytes).");
|
|
return unserialize($data);
|
|
}
|
|
|
|
/**
|
|
* Delete some data from the cache
|
|
*
|
|
* @param array $keys eg. array($level,$app,$location)
|
|
* @return boolean true on success, false on error (eg. $key not set)
|
|
*/
|
|
function delete(array $keys)
|
|
{
|
|
return $this->memcache->delete(self::key($keys));
|
|
}
|
|
|
|
/**
|
|
* Create a single key from $keys
|
|
*
|
|
* @param array $keys
|
|
* @return string
|
|
*/
|
|
private function key(array $keys)
|
|
{
|
|
return implode('::',$keys);
|
|
}
|
|
}
|