// this will set the 'notified' attribute to true for all Person objects in RPCUser
server0.invoke(rpcService, "runNotifyAllAsynch", null, null);
Thread.sleep(5000);
// confirm the attribute has been set successfully on each node
Object obj1 = server1.invoke(rpcService, "runRetrieveAll", null, null);
assertNotNull("expected ArrayList as result type, got null", obj1);
assertTrue( "expected ArrayList as result type, got " +obj1.getClass().getName(), obj1 instanceof ArrayList);
ArrayList responses = (ArrayList)obj1;
// there should be two Person responses, the 'notified' attribute should be true