initial commit; version 22.5.12042

libs/Phpfastcache8/Drivers/Leveldb/Driver.php

@@ -0,0 +1,145 @@
+<?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\Cluster\AggregatablePoolInterface;
+use Phpfastcache\Core\Pool\{DriverBaseTrait, ExtendedCacheItemPoolInterface, IO\IOHelperTrait};
+use Phpfastcache\Exceptions\{PhpfastcacheCoreException, PhpfastcacheInvalidArgumentException, PhpfastcacheLogicException};
+use Psr\Cache\CacheItemInterface;
+
+
+/**
+ * Class Driver
+ * @package phpFastCache\Drivers
+ * @property LeveldbClient $instance Instance of driver service
+ * @property Config $config Config object
+ * @method Config getConfig() Return the config object
+ */
+class Driver implements ExtendedCacheItemPoolInterface, AggregatablePoolInterface
+{
+    use DriverBaseTrait;
+    use IOHelperTrait;
+
+    protected const LEVELDB_FILENAME = '.database';
+
+    /**
+     * @return bool
+     */
+    public function driverCheck(): bool
+    {
+        return extension_loaded('Leveldb');
+    }
+
+    /**
+     * Close connection on destruct
+     */
+    public function __destruct()
+    {
+        if ($this->instance instanceof LeveldbClient) {
+            $this->instance->close();
+            $this->instance = null;
+        }
+    }
+
+    /**
+     * @param 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 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 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 PhpfastcacheCoreException
+     */
+    public function getLeveldbFile(): string
+    {
+        return $this->getPath() . '/' . self::LEVELDB_FILENAME;
+    }
+
+    /**
+     * @return bool
+     * @throws PhpfastcacheLogicException
+     */
+    protected function driverConnect(): bool
+    {
+        if ($this->instance instanceof LeveldbClient) {
+            throw new PhpfastcacheLogicException('Already connected to Leveldb database');
+        }
+
+        $this->instance = $this->instance ?: new LeveldbClient($this->getLeveldbFile());
+
+        return true;
+    }
+}