193 lines
No EOL
4 KiB
PHP
193 lines
No EOL
4 KiB
PHP
<?php
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/**
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* Simple Machines Forum (SMF)
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*
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* @package SMF
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* @author Simple Machines https://www.simplemachines.org
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* @copyright 2022 Simple Machines and individual contributors
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* @license https://www.simplemachines.org/about/smf/license.php BSD
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*
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* @version 2.1.2
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*/
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namespace SMF\Cache\APIs;
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use Memcache;
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use SMF\Cache\CacheApi;
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use SMF\Cache\CacheApiInterface;
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if (!defined('SMF'))
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die('No direct access...');
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/**
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* Our Cache API class
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*
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* @package CacheAPI
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*/
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class MemcacheImplementation extends CacheApi implements CacheApiInterface
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{
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const CLASS_KEY = 'cache_memcached';
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/**
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* @var Memcache The memcache instance.
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*/
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private $memcache = null;
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/**
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* {@inheritDoc}
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*/
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public function isSupported($test = false)
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{
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global $cache_memcached;
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$supported = class_exists('Memcache');
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if ($test)
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return $supported;
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return parent::isSupported() && $supported && !empty($cache_memcached);
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}
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/**
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* {@inheritDoc}
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*/
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public function connect()
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{
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global $db_persist, $cache_memcached;
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$this->memcache = new Memcache();
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$servers = explode(',', $cache_memcached);
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$port = 0;
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// Don't try more times than we have servers!
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$connected = false;
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$level = 0;
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// We should keep trying if a server times out, but only for the amount of servers we have.
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while (!$connected && $level < count($servers))
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{
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++$level;
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$server = trim($servers[array_rand($servers)]);
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// No server, can't connect to this.
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if (empty($server))
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continue;
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// Normal host names do not contain slashes, while e.g. unix sockets do. Assume alternative transport pipe with port 0.
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if (strpos($server, '/') !== false)
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$host = $server;
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else
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{
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$server = explode(':', $server);
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$host = $server[0];
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$port = isset($server[1]) ? $server[1] : 11211;
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}
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// Don't wait too long: yes, we want the server, but we might be able to run the query faster!
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if (empty($db_persist))
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$connected = $this->memcache->connect($host, $port);
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else
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$connected = $this->memcache->pconnect($host, $port);
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}
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return $connected;
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}
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/**
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* {@inheritDoc}
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*/
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public function getData($key, $ttl = null)
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{
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$key = $this->prefix . strtr($key, ':/', '-_');
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$value = $this->memcache->get($key);
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// $value should return either data or false (from failure, key not found or empty array).
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if ($value === false)
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return null;
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return $value;
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}
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/**
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* {@inheritDoc}
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*/
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public function putData($key, $value, $ttl = null)
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{
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$key = $this->prefix . strtr($key, ':/', '-_');
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return $this->memcache->set($key, $value, 0, $ttl !== null ? $ttl : $this->ttl);
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}
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/**
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* {@inheritDoc}
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*/
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public function quit()
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{
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return $this->memcache->close();
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}
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/**
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* {@inheritDoc}
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*/
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public function cleanCache($type = '')
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{
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$this->invalidateCache();
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return $this->memcache->flush();
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}
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/**
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* {@inheritDoc}
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*/
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public function cacheSettings(array &$config_vars)
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{
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global $context, $txt;
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if (!in_array($txt[self::CLASS_KEY .'_settings'], $config_vars))
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{
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$config_vars[] = $txt[self::CLASS_KEY .'_settings'];
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$config_vars[] = array(
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self::CLASS_KEY,
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$txt[self::CLASS_KEY .'_servers'],
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'file',
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'text',
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0,
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'subtext' => $txt[self::CLASS_KEY .'_servers_subtext']);
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}
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if (!isset($context['settings_post_javascript']))
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$context['settings_post_javascript'] = '';
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if (empty($context['settings_not_writable']))
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$context['settings_post_javascript'] .= '
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$("#cache_accelerator").change(function (e) {
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var cache_type = e.currentTarget.value;
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$("#'. self::CLASS_KEY .'").prop("disabled", cache_type != "MemcacheImplementation" && cache_type != "MemcachedImplementation");
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});';
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}
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/**
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* {@inheritDoc}
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*/
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public function getVersion()
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{
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if (!is_object($this->memcache))
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return false;
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// This gets called in Subs-Admin getServerVersions when loading up support information. If we can't get a connection, return nothing.
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$result = $this->memcache->getVersion();
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if (!empty($result))
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return $result;
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return false;
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}
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}
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?>
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