reactor has an auto reconnect feature you can use to reestablish the connection. see ConnectionMonitor's setAutoReconnectFrequency() method:http://www.unionplatform.com/docs/react ... Frequency(
in your situation, you should listen for the ReactorEvent.READY event. the first time it occurs, display a login dialog. if login succeeds, store the user's name and password in memory (i.e., in a variable). the second time the ReactorEvent.READY event occurs, perform the login automatically using the stored user name and password.
good luck with your application. let us know when it launches!