如何进行lucene FileDiRecordy索引的在线热备份？

我正在考虑添加JMXbean，以便对lucene索引进行热备份

LuceneMBean mbean=新LuceneMBeanImpl； ObjectName=newObjectNameIndexing.index:type=lucene； MBeanServer mbs=ManagementFactory.getPlatformMBeanServer； mbs.registerMBeanmbean，名称

Lucembean将有一个名为backupIndexString目录的方法

我查阅了lucene文档，找到了目录的复制方法。如果我在目录上打开了Writer，这个方法会起作用吗？基本上，我的代码片段如下所示：

public class LuceneMBeanImpl implements LuceneMBean{
     public void backupIndex(String directory){
           Directory fileDirectory =  FSDirectory.getDirectory(directory);
           Directory.copy(masterDirectory, fileDirectory,false);
     }
}

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我认为一个开放的Writer应该是可以的，但是当另一个线程修改索引时，您肯定不能复制，否则您可能会遇到FileNotFoundException。来源：

 /**
   * Copy contents of a directory src to a directory dest.
   * If a file in src already exists in dest then the
   * one in dest will be blindly overwritten.
   *
   * <p><b>NOTE:</b> the source directory cannot change
   * while this method is running.  Otherwise the results
   * are undefined and you could easily hit a
   * FileNotFoundException.
   *
   * @param src source directory
   * @param dest destination directory
   * @param closeDirSrc if <code>true</code>, call {@link #close()} method on source directory
   * @throws IOException
   */
  public static void copy(Directory src, Directory dest, boolean closeDirSrc) throws IOException {