Embedded broker with no persistence

[Datacom - Marcelo]

Hi, we are tring to start a broker for an embedded version of our 
application with only on JVM and we do not use persistence at all. We 
create a broker this way:

       BrokerService broker = new BrokerService();
       try {
           broker.setBrokerName("broker1");
           broker.setPersistent(false);
           broker.start();
      }....
But derby continues to run, even if we set persistence to false. Is 
there a way to tell to do not start derby or any other persistence 
mechanism ?

Thanks in adavance,

--
MARCELO Ribeiro