public void messageReceived(IoSession session, Object message) throws Exception {
if (message instanceof IoBuffer) {
IoBuffer buffer = (IoBuffer) message;
//System.out.println("length="+buffer.remaining());
for (int i = 0; i < buffer.remaining(); ++i) {
counter.countDown();
if (counter.getCount() > 0) {
sendMessage(session, data);
}
}