DistCpV1.java 文件源码

static private void finalize(Configuration conf, JobConf jobconf,
    final Path destPath, String presevedAttributes) throws IOException {
  if (presevedAttributes == null) {
    return;
  }
  EnumSet<FileAttribute> preseved = FileAttribute.parse(presevedAttributes);
  if (!preseved.contains(FileAttribute.USER)
      && !preseved.contains(FileAttribute.GROUP)
      && !preseved.contains(FileAttribute.PERMISSION)) {
    return;
  }

  FileSystem dstfs = destPath.getFileSystem(conf);
  Path dstdirlist = new Path(jobconf.get(DST_DIR_LIST_LABEL));
  try (SequenceFile.Reader in =
      new SequenceFile.Reader(jobconf, Reader.file(dstdirlist))) {
    Text dsttext = new Text();
    FilePair pair = new FilePair(); 
    for(; in.next(dsttext, pair); ) {
      Path absdst = new Path(destPath, pair.output);
      updateDestStatus(pair.input, dstfs.getFileStatus(absdst),
          preseved, dstfs);
    }
  }
}