void onMessage(const TcpConnectionPtr& pTcpConn, Buffer* buffer, TimeStamp reveiveTime) {
	printf("onMessage(): tid=%d received %zd bytes from connection [%s] at %s    \n",
	       CurrentThread::GetTid()
		   , buffer->ReadableBytes()
		   , pTcpConn->GetName().c_str()
		   , reveiveTime.ToFormattedString().c_str());
	printf("onMessage(): [%s]\n", buffer->RetrieveAsString().c_str());
}