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<?php
namespace SimpleSAML\Store;
use \SimpleSAML_Configuration as Configuration;
use \SimpleSAML\Store;
/**
* A memcache based data store.
*
* @package SimpleSAMLphp
*/
class Memcache extends Store
{
/**
* This variable contains the session name prefix.
*
* @var string
*/
private $prefix;
/**
* This function implements the constructor for this class. It loads the Memcache configuration.
*/
protected function __construct()
{
$config = Configuration::getInstance();
$this->prefix = $config->getString('memcache_store.prefix', 'simpleSAMLphp');
}
/**
* Retrieve a value from the data store.
*
* @param string $type The data type.
* @param string $key The key.
* @return mixed|null The value.
*/
public function get($type, $key)
{
assert('is_string($type)');
assert('is_string($key)');
return \SimpleSAML_Memcache::get($this->prefix . '.' . $type . '.' . $key);
}
/**
* Save a value to the data store.
*
* @param string $type The data type.
* @param string $key The key.
* @param mixed $value The value.
* @param int|NULL $expire The expiration time (unix timestamp), or NULL if it never expires.
*/
public function set($type, $key, $value, $expire = null)
{
assert('is_string($type)');
assert('is_string($key)');
assert('is_null($expire) || (is_int($expire) && $expire > 2592000)');
if ($expire === null) {
$expire = 0;
}
\SimpleSAML_Memcache::set($this->prefix . '.' . $type . '.' . $key, $value, $expire);
}
/**
* Delete a value from the data store.
*
* @param string $type The data type.
* @param string $key The key.
*/
public function delete($type, $key)
{
assert('is_string($type)');
assert('is_string($key)');
\SimpleSAML_Memcache::delete($this->prefix . '.' . $type . '.' . $key);
}
}
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