Retrieve our singleton instance. 
   32    {
   33        if (self::$instance !== null) {
   35        }
   36 
   38        $storeType = 
$config->getString(
'store.type', 
null);
 
   39        if ($storeType === null) {
   40            $storeType = 
$config->getString(
'session.handler', 
'phpsession');
 
   41        }
   42 
   43        switch ($storeType) {
   44            case 'phpsession':
   45                
   46                self::$instance = false;
   47                break;
   48            case 'memcache':
   49                self::$instance = new Store\Memcache();
   50                break;
   51            case 'sql':
   52                self::$instance = new Store\SQL();
   53                break;
   54            case 'redis':
   55                self::$instance = new Store\Redis();
   56                break;
   57            default:
   58                
   59                try {
   61                } catch (\Exception $e) {
   63                    $c[
'store.type'] = 
'phpsession';
 
   64                    throw new CriticalConfigurationError(
   65                        "Invalid 'store.type' configuration option. Cannot find store '$storeType'.",
   66                        null,
   68                    );
   69                }
   70                self::$instance = new $className();
   71        }
   72 
   74    }
static resolveClass($id, $type, $subclass=null)
Resolve module class.
static getInstance($instancename='simplesaml')
Get a configuration file by its instance name.