// simple invocation request.
Callback callback = new Callback(new Integer(callbackCounter++));
Iterator itr = listeners.iterator();
while(itr.hasNext())
{
InvokerCallbackHandler callbackHandler = (InvokerCallbackHandler) itr.next();
try
{
callbackHandler.handleCallback(callback);
}
catch(HandleCallbackException e)
{
e.printStackTrace();
}