Method onMessage

examples/netty/echo/server2.cc:59–65

  }

  void onMessage(const TcpConnectionPtr& conn, Buffer* buf, Timestamp)
  {
    size_t len = buf->readableBytes();
    transferredBytes_.addAndGet(len);
    receivedMessages_.incrementAndGet();
    conn->send(buf);
  }

  void printThroughput()
  {