code: @Override
  	public final void setDeliveryMode(int deliveryMode) throws JMSException
      {
          if (deliveryMode != DeliveryMode.PERSISTENT &&
              deliveryMode != DeliveryMode.NON_PERSISTENT)
              throw new FFMQException("Invalid delivery mode : "+deliveryMode,"INVALID_DELIVERY_MODE");
          
          this.defaultDeliveryMode = deliveryMode;
      }
docs: /* (non-Javadoc)
  @see javax.jms.MessageProducer#setDeliveryMode(int)