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File: Driver.php
<?php /** * * This file is part of phpFastCache. * * @license MIT License (MIT) * * For full copyright and license information, please see the docs/CREDITS.txt file. * * @author Khoa Bui (khoaofgod) <khoaofgod@gmail.com> https://www.phpfastcache.com * @author Georges.L (Geolim4) <contact@geolim4.com> * */ declare(strict_types=1); namespace Phpfastcache\Drivers\Leveldb; use LevelDB as LeveldbClient; use Phpfastcache\Core\Pool\{ DriverBaseTrait, ExtendedCacheItemPoolInterface, IO\IOHelperTrait }; use Phpfastcache\Exceptions\{ PhpfastcacheInvalidArgumentException, PhpfastcacheLogicException }; use Psr\Cache\CacheItemInterface; /** * Class Driver * @package phpFastCache\Drivers * @property LeveldbClient $instance Instance of driver service * @property Config $config Config object * @method Config getConfig() Return the config object */ class Driver implements ExtendedCacheItemPoolInterface { use DriverBaseTrait, IOHelperTrait; const LEVELDB_FILENAME = '.database'; /** * @return bool */ public function driverCheck(): bool { return \extension_loaded('Leveldb'); } /** * @return bool * @throws PhpfastcacheLogicException */ protected function driverConnect(): bool { if ($this->instance instanceof LeveldbClient) { throw new PhpfastcacheLogicException('Already connected to Leveldb database'); } $this->instance = $this->instance ?: new LeveldbClient($this->getLeveldbFile()); return true; } /** * @param \Psr\Cache\CacheItemInterface $item * @return null|array */ protected function driverRead(CacheItemInterface $item) { $val = $this->instance->get($item->getKey()); if ($val == false) { return null; } return $this->decode($val); } /** * @param \Psr\Cache\CacheItemInterface $item * @return bool * @throws PhpfastcacheInvalidArgumentException */ protected function driverWrite(CacheItemInterface $item): bool { /** * Check for Cross-Driver type confusion */ if ($item instanceof Item) { return (bool)$this->instance->set($item->getKey(), $this->encode($this->driverPreWrap($item))); } throw new PhpfastcacheInvalidArgumentException('Cross-Driver type confusion detected'); } /** * @param \Psr\Cache\CacheItemInterface $item * @return bool * @throws PhpfastcacheInvalidArgumentException */ protected function driverDelete(CacheItemInterface $item): bool { /** * Check for Cross-Driver type confusion */ if ($item instanceof Item) { return $this->instance->delete($item->getKey()); } throw new PhpfastcacheInvalidArgumentException('Cross-Driver type confusion detected'); } /** * @return bool */ protected function driverClear(): bool { if ($this->instance instanceof LeveldbClient) { $this->instance->close(); $this->instance = null; } $result = (bool)LeveldbClient::destroy($this->getLeveldbFile()); $this->driverConnect(); return $result; } /** * @return string * @throws \Phpfastcache\Exceptions\PhpfastcacheCoreException */ public function getLeveldbFile(): string { return $this->getPath() . '/' . self::LEVELDB_FILENAME; } /** * Close connection on destruct */ public function __destruct() { if ($this->instance instanceof LeveldbClient) { $this->instance->close(); $this->instance = null; } } }