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147 lines
4.0 KiB
PHP
147 lines
4.0 KiB
PHP
<?php
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/**
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+-----------------------------------------------------------------------+
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2011-2018, The Roundcube Dev Team |
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| Copyright (C) 2011-2018, Kolab Systems AG |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| PURPOSE: |
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| Caching engine - APC |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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| Author: Aleksander Machniak <alec@alec.pl> |
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+-----------------------------------------------------------------------+
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*/
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/**
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* Interface class for accessing APC cache
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*
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* @package Framework
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* @subpackage Cache
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* @author Thomas Bruederli <roundcube@gmail.com>
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* @author Aleksander Machniak <alec@alec.pl>
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*/
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class rcube_cache_apc extends rcube_cache
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{
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/**
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* Indicates if APC module is enabled and in a required version
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*
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* @var bool
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*/
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protected $enabled;
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/**
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* Object constructor.
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*
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* @param int $userid User identifier
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* @param string $prefix Key name prefix
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* @param string $ttl Expiration time of memcache/apc items
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* @param bool $packed Enables/disabled data serialization.
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* It's possible to disable data serialization if you're sure
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* stored data will be always a safe string
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*/
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public function __construct($userid, $prefix = '', $ttl = 0, $packed = true)
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{
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parent::__construct($userid, $prefix, $ttl, $packed);
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$rcube = rcube::get_instance();
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$this->type = 'apc';
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$this->enabled = function_exists('apc_exists'); // APC 3.1.4 required
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$this->debug = $rcube->config->get('apc_debug');
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}
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/**
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* Remove cache records older than ttl
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*/
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public function expunge()
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{
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// No need for GC, entries are expunged automatically
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}
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/**
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* Remove expired records of all caches
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*/
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public static function gc()
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{
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// No need for GC, entries are expunged automatically
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}
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/**
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* Reads cache entry.
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*
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* @param string $key Cache internal key name
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*
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* @return mixed Cached value
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*/
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protected function get_item($key)
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{
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if (!$this->enabled) {
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return false;
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}
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$data = apc_fetch($key);
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if ($this->debug) {
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$this->debug('get', $key, $data);
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}
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return $data;
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}
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/**
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* Adds entry into memcache/apc/redis DB.
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*
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* @param string $key Cache internal key name
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* @param mixed $data Serialized cache data
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*
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* @param boolean True on success, False on failure
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*/
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protected function add_item($key, $data)
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{
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if (!$this->enabled) {
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return false;
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}
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if (apc_exists($key)) {
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apc_delete($key);
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}
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$result = apc_store($key, $data, $this->ttl);
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if ($this->debug) {
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$this->debug('set', $key, $data, $result);
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}
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return $result;
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}
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/**
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* Deletes entry from memcache/apc/redis DB.
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*
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* @param string $key Cache internal key name
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*
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* @param boolean True on success, False on failure
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*/
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protected function delete_item($key)
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{
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if (!$this->enabled) {
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return false;
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}
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$result = apc_delete($key);
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if ($this->debug) {
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$this->debug('delete', $key, null, $result);
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}
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return $result;
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}
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}
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