tracker = new ServiceTracker(context, InterfaceB.class.getName(), null);
tracker.open();
Dictionary<String, Object> props = new Hashtable<String, Object>();
props.put(Constants.SERVICE_PID, "org.apache.aries.jmx.test.ServiceA");
registration = context.registerService(new String[] { InterfaceA.class.getName(), ManagedService.class.getName() }, new A(tracker), props);
}