/**
* Flush cache
* @param string|null $ps_namespace Optional namespace definition. If given, only this namespace is wiped.
* @throws MemoryCacheInvalidParameterException
*/
public static function flush($ps_namespace = null)
{
if (!$ps_namespace) {
self::$opa_caches = array();
} else {
if (!is_string($ps_namespace)) {
throw new MemoryCacheInvalidParameterException('Namespace has to be a string');
}
self::$opa_caches[$ps_namespace] = array();
}
}
