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class.fastcache.inc
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class.fastcache.inc
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<?php
/**
* Copyright (c) 2016, 2024, 5 Mode
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither 5 Mode nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* class.fastcache.inc
*
* FastCache class (using Memcached).
*
* @author Daniele Bonini <[email protected]>
* @copyrights (c) 2016, 2024, 5 Mode
* @license https://opensource.org/licenses/BSD-3-Clause
*/
namespace OpenGallery\OpenGallery;
/**
* FastCache
*
* FastCache class
*
* @package OpenGallery http://github.com/par7133
* @author Daniele Bonini <[email protected]>
* @version 2.0
* @phpver 7.4 up
* @access public
* @note You have to declare in your "config.inc" file - or whatever file you
* use for the purpose, the following global constants:
* define('CACHE_HOST', "localhost");
* define('CACHE_PORT', "11211");
* define('CACHE_APP_PREFIX', "MyAPP_12345");
*/
final class FastCache extends \Memcached
{
/**
* The static instance of FastCache
*
* @access private
* @var Cache
*/
private static $_instance = null;
/**
* Get the static instance of FastCache
*
* @return Cache
*/
public static function &getInstance(): FastCache
{
if(!isset(self::$_instance)){
self::$_instance = new FastCache();
self::$_instance->addServer(CACHE_HOST, CACHE_PORT);
}
return self::$_instance;
}
/**
* Get the service status
*
* @return bool
*/
public static function getStatus(): bool
{
return true;
}
/**
* Check if the static instance is set
*
* @return bool
*/
public static function issetInstance(): bool
{
return isset(self::$_instance);
}
/**
* Unset the static instance
*
* @return void
*/
public static function unsetInstance(): void
{
if (self::$_instance) {
self::$_instance->quit();
self::$_instance = null;
}
}
/**
* Default constructor
*
* @return void
*/
private function __construct()
{
parent::__construct();
}
/**
* Retrieve item from the cache server
*
* @param string $key the key to fetch
* @param int $flags the flags
* @return mixed the value stored in cache or false
*/
public function getObj(string $key, ?int $flags = null)
{
if (!isset($flags)) {
$ret = $this->get(CACHE_APP_PREFIX . $key);
} else {
$ret = $this->get(CACHE_APP_PREFIX . $key, null, $flags);
}
if ($this->getResultCode() == \Memcached::RES_NOTFOUND) {
return false;
} else {
return $ret;
}
}
/**
* Store data in the cache server
*
* @param string $key the key to associated with the item.
* @param mixed $var the object to store
* @param int $flags the flags
* @param int $expire expiration time, in seconds
* @return bool true on success or false on failure
*/
public function setObj(string $key, &$var, ?int $flags = null, ?int $expire = null): bool
{
// cache insert
if (!isset($expire)) {
return $this->set(CACHE_APP_PREFIX . $key, $var);
}
return $this->set(CACHE_APP_PREFIX . $key, $var, $expire);
}
/**
* Retrieve item from the cache server (decoded by json_decode)
*
* @param string $key the key to fetch
* @param int $flags the flags
* @return mixed the value stored in cache or false
*/
public function getJ(string $key, ?int $flags = null)
{
if (!isset($flags)) {
$ret = json_decode($this->get(CACHE_APP_PREFIX . $key), true);
} else {
$ret = json_decode($this->get(CACHE_APP_PREFIX . $key, null, $flags), true);
}
if ($this->getResultCode() == \Memcached::RES_NOTFOUND) {
return false;
} else {
return $ret;
}
}
/**
* Store data in the cache server (encoded by json_encode)
*
* @param string $key the key to associated with the item.
* @param mixed $var the value to store
* @param int $flags the flags
* @param int $expire expiration time, in seconds
* @return bool true on success or false on failure
*/
public function setJ(string $key, &$var, ?int $flags = null, ?int $expire = null): bool
{
// cache insert
if (!isset($expire)) {
return $this->set(CACHE_APP_PREFIX . $key, json_encode($var));
}
return $this->set(CACHE_APP_PREFIX . $key, json_encode($var), $expire);
}
/**
* Test the validity of the "global" cache expiration time
*
* @param string $testText the text used to generate the key for the test
*
* @return bool true if the caching expiration time is not gone
*/
public function testLastCached($testText) {
return json_decode($this->get(md5($testText)), true);
}
}