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<?php
/**
* @author Andreas Fischer <bantu@owncloud.com>
* @author Lukas Reschke <lukas@owncloud.com>
* @author Markus Goetz <markus@woboq.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Memcache;
use \OCP\ICacheFactory;
use \OCP\ILogger;
class Factory implements ICacheFactory {
const NULL_CACHE = '\\OC\\Memcache\\NullCache';
/**
* @var string $globalPrefix
*/
private $globalPrefix;
/**
* @var ILogger $logger
*/
private $logger;
/**
* @var string $localCacheClass
*/
private $localCacheClass;
/**
* @var string $distributedCacheClass
*/
private $distributedCacheClass;
/**
* @var string $lockingCacheClass
*/
private $lockingCacheClass;
/**
* @param string $globalPrefix
* @param ILogger $logger
* @param string|null $localCacheClass
* @param string|null $distributedCacheClass
* @param string|null $lockingCacheClass
*/
public function __construct($globalPrefix, ILogger $logger,
$localCacheClass = null, $distributedCacheClass = null, $lockingCacheClass = null)
{
$this->logger = $logger;
$this->globalPrefix = $globalPrefix;
if (!$localCacheClass) {
$localCacheClass = self::NULL_CACHE;
}
if (!$distributedCacheClass) {
$distributedCacheClass = $localCacheClass;
}
$missingCacheMessage = 'Memcache {class} not available for {use} cache';
$missingCacheHint = 'Is the matching PHP module installed and enabled?';
if (!$localCacheClass::isAvailable()) {
if (\OC::$CLI) {
// CLI should not hard-fail on broken memcache
$this->logger->info($missingCacheMessage, [
'class' => $localCacheClass,
'use' => 'local',
'app' => 'cli'
]);
$localCacheClass = self::NULL_CACHE;
} else {
throw new \OC\HintException(strtr($missingCacheMessage, [
'{class}' => $localCacheClass, '{use}' => 'local'
]), $missingCacheHint);
}
}
if (!$distributedCacheClass::isAvailable()) {
if (\OC::$CLI) {
// CLI should not hard-fail on broken memcache
$this->logger->info($missingCacheMessage, [
'class' => $distributedCacheClass,
'use' => 'distributed',
'app' => 'cli'
]);
$distributedCacheClass = self::NULL_CACHE;
} else {
throw new \OC\HintException(strtr($missingCacheMessage, [
'{class}' => $distributedCacheClass, '{use}' => 'distributed'
]), $missingCacheHint);
}
}
if (!($lockingCacheClass && $lockingCacheClass::isAvailable())) {
// dont fallback since the fallback might not be suitable for storing lock
$lockingCacheClass = self::NULL_CACHE;
}
$this->localCacheClass = $localCacheClass;
$this->distributedCacheClass = $distributedCacheClass;
$this->lockingCacheClass = $lockingCacheClass;
}
/**
* create a cache instance for storing locks
*
* @param string $prefix
* @return \OCP\IMemcache
*/
public function createLocking($prefix = '') {
return new $this->lockingCacheClass($this->globalPrefix . '/' . $prefix);
}
/**
* 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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