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<?php
/**
* Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Memcache;
use \OCP\ICacheFactory;
class Factory implements ICacheFactory {
const NULL_CACHE = '\\OC\\Memcache\\Null';
/**
* @var string $globalPrefix
*/
private $globalPrefix;
/**
* @var string $localCacheClass
*/
private $localCacheClass;
/**
* @var string $distributedCacheClass
*/
private $distributedCacheClass;
/**
* @param string $globalPrefix
* @param string|null $localCacheClass
* @param string|null $distributedCacheClass
*/
public function __construct($globalPrefix,
$localCacheClass = null, $distributedCacheClass = null)
{
$this->globalPrefix = $globalPrefix;
if (!($localCacheClass && $localCacheClass::isAvailable())) {
$localCacheClass = self::NULL_CACHE;
}
if (!($distributedCacheClass && $distributedCacheClass::isAvailable())) {
$distributedCacheClass = $localCacheClass;
}
$this->localCacheClass = $localCacheClass;
$this->distributedCacheClass = $distributedCacheClass;
}
/**
* create a distributed cache instance
*
* @param string $prefix
* @return \OC\Memcache\Cache
*/
public function createDistributed($prefix = '') {
return new $this->distributedCacheClass($this->globalPrefix . '/' . $prefix);
}
/**
* create a local cache instance
*
* @param string $prefix
* @return \OC\Memcache\Cache
*/
public function createLocal($prefix = '') {
return new $this->localCacheClass($this->globalPrefix . '/' . $prefix);
}
/**
* @see \OC\Memcache\Factory::createDistributed()
* @param string $prefix
* @return \OC\Memcache\Cache
*/
public function create($prefix = '') {
return $this->createDistributed($prefix);
}
/**
* check memcache availability
*
* @return bool
*/
public function isAvailable() {
return ($this->distributedCacheClass !== self::NULL_CACHE);
}
/**
* @see \OC\Memcache\Factory::createLocal()
* @param string $prefix
* @return \OC\Memcache\Cache|null
*/
public function createLowLatency($prefix = '') {
return $this->createLocal($prefix);
}
/**
* check local memcache availability
*
* @return bool
*/
public function isAvailableLowLatency() {
return ($this->localCacheClass !== self::NULL_CACHE);
}
}
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