import org.apache.hadoop.yarn.server.nodemanager.DeletionService.FileDeletionTask; //导入依赖的package包/类
private void cleanUpFilesPerUserDir(FileContext lfs, DeletionService del,
    Path userDirPath) throws IOException {
  RemoteIterator<FileStatus> userDirStatus = lfs.listStatus(userDirPath);
  FileDeletionTask dependentDeletionTask =
      del.createFileDeletionTask(null, userDirPath, new Path[] {});
  if (userDirStatus != null && userDirStatus.hasNext()) {
    List<FileDeletionTask> deletionTasks = new ArrayList<FileDeletionTask>();
    while (userDirStatus.hasNext()) {
      FileStatus status = userDirStatus.next();
      String owner = status.getOwner();
      FileDeletionTask deletionTask =
          del.createFileDeletionTask(owner, null,
            new Path[] { status.getPath() });
      deletionTask.addFileDeletionTaskDependency(dependentDeletionTask);
      deletionTasks.add(deletionTask);
    }
    for (FileDeletionTask task : deletionTasks) {
      del.scheduleFileDeletionTask(task);
    }
  } else {
    del.scheduleFileDeletionTask(dependentDeletionTask);
  }
}
 

import org.apache.hadoop.yarn.server.nodemanager.DeletionService.FileDeletionTask; //导入依赖的package包/类
private void cleanUpFilesPerUserDir(FileContext lfs, DeletionService del,
    Path userDirPath) throws IOException {
  RemoteIterator<FileStatus> userDirStatus = lfs.listStatus(userDirPath);
  FileDeletionTask dependentDeletionTask =
      del.createFileDeletionTask(null, userDirPath, new Path[] {});
  if (userDirStatus != null) {
    List<FileDeletionTask> deletionTasks = new ArrayList<FileDeletionTask>();
    while (userDirStatus.hasNext()) {
      FileStatus status = userDirStatus.next();
      String owner = status.getOwner();
      FileDeletionTask deletionTask =
          del.createFileDeletionTask(owner, null,
            new Path[] { status.getPath() });
      deletionTask.addFileDeletionTaskDependency(dependentDeletionTask);
      deletionTasks.add(deletionTask);
    }
    for (FileDeletionTask task : deletionTasks) {
      del.scheduleFileDeletionTask(task);
    }
  } else {
    del.scheduleFileDeletionTask(dependentDeletionTask);
  }
}
 

import org.apache.hadoop.yarn.server.nodemanager.DeletionService.FileDeletionTask; //导入依赖的package包/类
@Override
public boolean matches(Object o) {
  FileDeletionTask fd = (FileDeletionTask)o;
  if (fd.getUser() == null && user != null) {
    return false;
  } else if (fd.getUser() != null && user == null) {
    return false;
  } else if (fd.getUser() != null && user != null) {
    return fd.getUser().equals(user);
  }
  if (!comparePaths(fd.getSubDir(), subDirIncludes)) {
    return false;
  }
  if (baseDirIncludes == null && fd.getBaseDirs() != null) {
    return false;
  } else if (baseDirIncludes != null && fd.getBaseDirs() == null ) {
    return false;
  } else if (baseDirIncludes != null && fd.getBaseDirs() != null) {
    if (baseDirIncludes.length != fd.getBaseDirs().size()) {
      return false;
    }
    for (int i =0 ; i < baseDirIncludes.length; i++) {
      if (!comparePaths(fd.getBaseDirs().get(i), baseDirIncludes[i])) {
        return false;
      }
    }
  }
  return true;
}