146 lines
3.9 KiB
PHP
146 lines
3.9 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (C) 2020, Friendica
|
|
*
|
|
* @license GNU AGPL version 3 or any later version
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* 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
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
namespace Friendica\Factory;
|
|
|
|
use Friendica\Core\Cache\IMemoryCache;
|
|
use Friendica\Core\Cache\Type;
|
|
use Friendica\Core\Config\IConfig;
|
|
use Friendica\Core\Lock;
|
|
use Friendica\Database\Database;
|
|
use Psr\Log\LoggerInterface;
|
|
|
|
/**
|
|
* Class LockFactory
|
|
*
|
|
* @package Friendica\Core\Cache
|
|
*
|
|
* A basic class to generate a LockDriver
|
|
*/
|
|
class LockFactory
|
|
{
|
|
/**
|
|
* @var string The default driver for caching
|
|
*/
|
|
const DEFAULT_DRIVER = 'default';
|
|
|
|
/**
|
|
* @var IConfig The configuration to read parameters out of the config
|
|
*/
|
|
private $config;
|
|
|
|
/**
|
|
* @var Database The database connection in case that the cache is used the dba connection
|
|
*/
|
|
private $dba;
|
|
|
|
/**
|
|
* @var CacheFactory The memory cache driver in case we use it
|
|
*/
|
|
private $cacheFactory;
|
|
|
|
/**
|
|
* @var LoggerInterface The Friendica Logger
|
|
*/
|
|
private $logger;
|
|
|
|
public function __construct(CacheFactory $cacheFactory, IConfig $config, Database $dba, LoggerInterface $logger)
|
|
{
|
|
$this->cacheFactory = $cacheFactory;
|
|
$this->config = $config;
|
|
$this->dba = $dba;
|
|
$this->logger = $logger;
|
|
}
|
|
|
|
public function create()
|
|
{
|
|
$lock_type = $this->config->get('system', 'lock_driver', self::DEFAULT_DRIVER);
|
|
|
|
try {
|
|
switch ($lock_type) {
|
|
case Type::MEMCACHE:
|
|
case Type::MEMCACHED:
|
|
case Type::REDIS:
|
|
case Type::APCU:
|
|
$cache = $this->cacheFactory->create($lock_type);
|
|
if ($cache instanceof IMemoryCache) {
|
|
return new Lock\CacheLock($cache);
|
|
} else {
|
|
throw new \Exception(sprintf('Incompatible cache driver \'%s\' for lock used', $lock_type));
|
|
}
|
|
break;
|
|
|
|
case 'database':
|
|
return new Lock\DatabaseLock($this->dba);
|
|
break;
|
|
|
|
case 'semaphore':
|
|
return new Lock\SemaphoreLock();
|
|
break;
|
|
|
|
default:
|
|
return self::useAutoDriver();
|
|
}
|
|
} catch (\Exception $exception) {
|
|
$this->logger->alert('Driver \'' . $lock_type . '\' failed - Fallback to \'useAutoDriver()\'', ['exception' => $exception]);
|
|
return self::useAutoDriver();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method tries to find the best - local - locking method for Friendica
|
|
*
|
|
* The following sequence will be tried:
|
|
* 1. Semaphore Locking
|
|
* 2. Cache Locking
|
|
* 3. Database Locking
|
|
*
|
|
* @return Lock\ILock
|
|
*/
|
|
private function useAutoDriver()
|
|
{
|
|
// 1. Try to use Semaphores for - local - locking
|
|
if (function_exists('sem_get')) {
|
|
try {
|
|
return new Lock\SemaphoreLock();
|
|
} catch (\Exception $exception) {
|
|
$this->logger->debug('Using Semaphore driver for locking failed.', ['exception' => $exception]);
|
|
}
|
|
}
|
|
|
|
// 2. Try to use Cache Locking (don't use the DB-Cache Locking because it works different!)
|
|
$cache_type = $this->config->get('system', 'cache_driver', 'database');
|
|
if ($cache_type != Type::DATABASE) {
|
|
try {
|
|
$cache = $this->cacheFactory->create($cache_type);
|
|
if ($cache instanceof IMemoryCache) {
|
|
return new Lock\CacheLock($cache);
|
|
}
|
|
} catch (\Exception $exception) {
|
|
$this->logger->debug('Using Cache driver for locking failed.', ['exception' => $exception]);
|
|
}
|
|
}
|
|
|
|
// 3. Use Database Locking as a Fallback
|
|
return new Lock\DatabaseLock($this->dba);
|
|
}
|
|
}
|