org.apache.hadoop.fs

クラス Trash

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.fs.Trash

すべての実装されたインタフェース:

Configurable

@InterfaceAudience.Public
 @InterfaceStability.Stable
public class Trash
extends Configured

Provides a trash facility which supports pluggable Trash policies. See the implementation of the configured TrashPolicy for more details.

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
Trash(Configuration conf) Construct a trash can accessor.
Trash(FileSystem fs, Configuration conf) Construct a trash can accessor for the FileSystem provided.

メソッドのサマリー

修飾子とタイプ	メソッドと説明
void	checkpoint() Create a trash checkpoint.
void	expunge() Delete old checkpoint(s).
Path	getCurrentTrashDir(Path path)
Runnable	getEmptier() Return a Runnable that periodically empties the trash of all users, intended to be run by the superuser.
boolean	isEnabled() Returns whether the trash is enabled for this filesystem
static boolean	moveToAppropriateTrash(FileSystem fs, Path p, Configuration conf) In case of the symlinks or mount points, one has to move the appropriate trashbin in the actual volume of the path p being deleted.
boolean	moveToTrash(Path path) Move a file or directory to the current trash directory.

クラスから継承されたメソッド org.apache.hadoop.conf.Configured

getConf, setConf

クラスから継承されたメソッド java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

コンストラクタの詳細

Trash

public Trash(Configuration conf)
      throws IOException

Construct a trash can accessor.

パラメータ:

conf - a Configuration

例外:

IOException

Trash

public Trash(FileSystem fs,
             Configuration conf)
      throws IOException

Construct a trash can accessor for the FileSystem provided.

パラメータ:

fs - the FileSystem

conf - a Configuration

例外:

IOException

メソッドの詳細

moveToAppropriateTrash

public static boolean moveToAppropriateTrash(FileSystem fs,
                                             Path p,
                                             Configuration conf)
                                      throws IOException

In case of the symlinks or mount points, one has to move the appropriate trashbin in the actual volume of the path p being deleted. Hence we get the file system of the fully-qualified resolved-path and then move the path p to the trashbin in that volume,

パラメータ:

fs - - the filesystem of path p

p - - the path being deleted - to be moved to trasg

conf - - configuration

戻り値:

false if the item is already in the trash or trash is disabled

例外:

IOException - on error

isEnabled

public boolean isEnabled()

Returns whether the trash is enabled for this filesystem

moveToTrash

public boolean moveToTrash(Path path)
                    throws IOException

Move a file or directory to the current trash directory.

戻り値:

false if the item is already in the trash or trash is disabled

例外:

IOException

checkpoint

public void checkpoint()
                throws IOException

Create a trash checkpoint.

例外:

IOException

expunge

public void expunge()
             throws IOException

Delete old checkpoint(s).

例外:

IOException

getEmptier

public Runnable getEmptier()
                    throws IOException

Return a Runnable that periodically empties the trash of all users, intended to be run by the superuser.

例外:

IOException

getCurrentTrashDir

public Path getCurrentTrashDir(Path path)
                        throws IOException

例外:

IOException