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File Content: `Memcache.php`

<?php

/*
 * This file is part of the Stash package.
 *
 * (c) Robert Hafner <tedivm@tedivm.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PleskCatalog\Stash\Driver;

use Stash;
use PleskCatalog\Stash\Exception\RuntimeException;
use PleskCatalog\Stash\Driver\Sub\Memcache as SubMemcache;
use PleskCatalog\Stash\Driver\Sub\Memcached as SubMemcached;
/**
 * Memcache is a wrapper around the popular memcache server. Memcache supports both memcache php
 * extensions and allows access to all of their options as well as all Stash features (including hierarchical caching).
 *
 * @package Stash
 * @author  Robert Hafner <tedivm@tedivm.com>
 */
class Memcache extends AbstractDriver
{
    /**
     * Memcache subdriver used by this class.
     *
     * @var SubMemcache|SubMemcached
     */
    protected $memcache;
    /**
     * Cache of calculated keys.
     *
     * @var array
     */
    protected $keyCache = array();
    /**
     * Timestamp of last time the key cache was updated.
     *
     * @var int timestamp
     */
    protected $keyCacheTime = 0;
    /**
     * Limit
     *
     * @var int seconds
     */
    protected $keyCacheTimeLimit = 1;
    /**
     * {@inheritdoc}
     */
    public function getDefaultOptions()
    {
        return array('keycache_limit' => 1);
    }
    /**
     *
     * * servers - An array of servers, with each server represented by its own array (array(host, port, [weight])). If
     * not passed the default is array('127.0.0.1', 11211).
     *
     * * extension - Which php extension to use, either 'memcache' or 'memcache'. Defaults to memcache with memcache
     * as a fallback.
     *
     * * Options can be passed to the "memcache" driver by adding them to the options array. The memcache extension
     * defined options using constants, ie Memcached::OPT_*. By passing in the * portion ('compression' for
     * Memcached::OPT_COMPRESSION) and its respective option. Please see the php manual for the specific options
     * (http://us2.php.net/manual/en/memcache.constants.php)
     *
     *
     * @param array $options
     *
     * @throws RuntimeException
     */
    protected function setOptions(array $options = array())
    {
        $options += $this->getDefaultOptions();
        if (!isset($options['servers'])) {
            $options['servers'] = array('127.0.0.1', 11211);
        }
        $servers = $this->normalizeServerConfig($options['servers']);
        if (!isset($options['extension'])) {
            $options['extension'] = 'any';
        }
        $this->keyCacheTimeLimit = (int) $options['keycache_limit'];
        $extension = \strtolower($options['extension']);
        if (\class_exists('Memcached', \false) && $extension != 'memcache') {
            $this->memcache = new SubMemcached($servers, $options);
        } elseif (\class_exists('Memcache', \false) && $extension != 'memcached') {
            $this->memcache = new SubMemcache($servers);
        } else {
            throw new RuntimeException('No memcache extension available.');
        }
    }
    protected function normalizeServerConfig($servers)
    {
        if (\is_scalar($servers[0])) {
            $servers = array($servers);
        }
        $normalizedServers = array();
        foreach ($servers as $server) {
            $host = '127.0.0.1';
            if (isset($server['host'])) {
                $host = $server['host'];
            } elseif (isset($server[0])) {
                $host = $server[0];
            }
            $port = '11211';
            if (isset($server['port'])) {
                $port = $server['port'];
            } elseif (isset($server[1])) {
                $port = $server[1];
            }
            $weight = null;
            if (isset($server['weight'])) {
                $weight = $server['weight'];
            } elseif (isset($server[2])) {
                $weight = $server[2];
            }
            $normalizedServers[] = array($host, $port, $weight);
        }
        return $normalizedServers;
    }
    /**
     * {@inheritdoc}
     */
    public function getData($key)
    {
        return $this->memcache->get($this->makeKeyString($key));
    }
    /**
     * {@inheritdoc}
     */
    public function storeData($key, $data, $expiration)
    {
        return $this->memcache->set($this->makeKeyString($key), $data, $expiration);
    }
    /**
     * {@inheritdoc}
     */
    public function clear($key = null)
    {
        $this->keyCache = array();
        if (\is_null($key)) {
            $this->memcache->flush();
        } else {
            $keyString = $this->makeKeyString($key, \true);
            $this->memcache->inc($keyString);
            $this->keyCache = array();
            $this->makeKeyString($key);
        }
        $this->keyCache = array();
        return \true;
    }
    /**
     * {@inheritdoc}
     */
    public function purge()
    {
        return \true;
    }
    /**
     * Turns a key array into a key string. This includes running the indexing functions used to manage the memcached
     * hierarchical storage.
     *
     * When requested the actual path, rather than a normalized value, is returned.
     *
     * @param  array  $key
     * @param  bool   $path
     * @return string
     */
    protected function makeKeyString($key, $path = \false)
    {
        $key = \PleskCatalog\Stash\Utilities::normalizeKeys($key);
        $keyString = ':cache:::';
        $pathKey = ':pathdb::';
        $time = \microtime(\true);
        if ($time - $this->keyCacheTime >= $this->keyCacheTimeLimit) {
            $this->keyCacheTime = $time;
            $this->keyCache = array();
        }
        foreach ($key as $name) {
            //a. cache:::name
            //b. cache:::name0:::sub
            $keyString .= $name;
            //a. :pathdb::cache:::name
            //b. :pathdb::cache:::name0:::sub
            $pathKey = ':pathdb::' . $keyString;
            $pathKey = \md5($pathKey);
            if (isset($this->keyCache[$pathKey])) {
                $index = $this->keyCache[$pathKey];
            } else {
                $index = $this->memcache->cas($pathKey, 0);
                $this->keyCache[$pathKey] = $index;
            }
            //a. cache:::name0:::
            //b. cache:::name0:::sub1:::
            $keyString .= '_' . $index . ':::';
        }
        return $path ? $pathKey : \md5($keyString);
    }
    /**
     * {@inheritdoc}
     */
    public static function isAvailable()
    {
        return SubMemcache::isAvailable() || SubMemcached::isAvailable();
    }
    /**
     * {@inheritdoc}
     */
    public function isPersistent()
    {
        return \true;
    }
}
Name	Size	Permission
FileSystem	---	0755
Sub	---	0755
AbstractDriver.php	1444 bytes	0644
Apc.php	5833 bytes	0644
BlackHole.php	953 bytes	0644
Composite.php	5182 bytes	0644
Ephemeral.php	3558 bytes	0644
FileSystem.php	12994 bytes	0644
Memcache.php	6768 bytes	0644
Redis.php	8719 bytes	0644
Sqlite.php	6729 bytes	0644
File Content: Memcache.php

File Content: `Memcache.php`
