// clean up callback server connector if one exists
Connector callbackConnector = (Connector) callbackConnectors.remove(callbackHandler);
if (callbackConnector != null)
{
callbackConnector.stop();
callbackConnector.destroy();
}
// clean up callback poller if one exists
CallbackPoller callbackPoller = (CallbackPoller) callbackPollers.remove(callbackHandler);
if (callbackPoller != null)