public static function getEventQueue($name)
 {
     static $queues;
     // make queue if needed
     if (!isset($queues[$name])) {
         // get queue config
         $s = owa_coreAPI::serviceSingleton();
         $map = $s->getMapValue('event_queues', $name);
         if ($map) {
             $implementation = $s->getMapValue('event_queue_types', $map['queue_type']);
             if ($implementation && isset($implementation[0]) && isset($implementation[1])) {
                 owa_coreAPI::debug(print_r($implementation, true));
                 $queues[$name] = owa_lib::simpleFactory($implementation[0], $implementation[1], $map);
             } else {
                 throw new Exception("No event queue by that type found.");
             }
         } else {
             throw new Exception("No configuration found for event queue {$name}.");
         }
     }
     // return queue
     return $queues[$name];
 }