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