Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Core/Cache.php
*/
namespace Friendica\Core;
use Friendica\Core\Cache\CacheDriverFactory;
/**
* @brief Class for storing data for a short time
*/
class Cache extends \Friendica\BaseObject
{
const MONTH = 2592000;
const WEEK = 604800;
const DAY = 86400;
const HOUR = 3600;
const HALF_HOUR = 1800;
const QUARTER_HOUR = 900;
const FIVE_MINUTES = 300;
const MINUTE = 60;
const INFINITE = 0;
/**
* @var Cache\ICacheDriver
*/
private static $driver = null;
public static $driver_class = null;
public static $driver_name = null;
public static function init()
{
self::$driver_name = Config::get('system', 'cache_driver', 'database');
self::$driver = CacheDriverFactory::create(self::$driver_name);
self::$driver_class = get_class(self::$driver);
}
/**
* Returns the current cache driver
*
* @return Cache\ICacheDriver
*/
private static function getDriver()
{
if (self::$driver === null) {
self::init();
}
return self::$driver;
}
/**
* @brief Returns all the cache keys sorted alphabetically
*
* @param string $prefix Prefix of the keys (optional)
*
* @return array Empty if the driver doesn't support this feature
*/
public static function getAllKeys($prefix = null)
{
$time = microtime(true);
$return = self::getDriver()->getAllKeys($prefix);
self::getApp()->saveTimestamp($time, 'cache');
return $return;
}
/**
* @brief Fetch cached data according to the key
*
* @param string $key The key to the cached data
*
* @return mixed Cached $value or "null" if not found
*/
public static function get($key)
{
$time = microtime(true);
$return = self::getDriver()->get($key);
self::getApp()->saveTimestamp($time, 'cache');
return $return;
}
/**
* @brief Put data in the cache according to the key
*
* The input $value can have multiple formats.
*
* @param string $key The key to the cached data
* @param mixed $value The value that is about to be stored
* @param integer $duration The cache lifespan
*
* @return bool
*/
public static function set($key, $value, $duration = self::MONTH)
{
$time = microtime(true);
$return = self::getDriver()->set($key, $value, $duration);
self::getApp()->saveTimestamp($time, 'cache_write');
return $return;
}
/**
* @brief Delete a value from the cache
*
* @param string $key The key to the cached data
*
* @return bool
*/
public static function delete($key)
{
$time = microtime(true);
$return = self::getDriver()->delete($key);
self::getApp()->saveTimestamp($time, 'cache_write');
return $return;
}
/**
* @brief Remove outdated data from the cache
*
* @param boolean $outdated just remove outdated values
*
* @return void
*/
public static function clear($outdated = true)
{
return self::getDriver()->clear($outdated);
}
}