@Override
public void handle(SelectionKey key, Selector selector) {
if (null == key.attachment()) {
System.out.println("key.attachment() is null ... ");
return;
}
FileSender sender = (FileSender) key.attachment();
System.out.println("get write request.attachemnt fileName : " + sender);
// send file and register read
sender.send((SocketChannel) key.channel());
}
