org.apache.hadoop.hbase.master.cleaner

Interface FileCleanerDelegate

All Superinterfaces:

org.apache.hadoop.conf.Configurable, Stoppable

All Known Implementing Classes:

BaseFileCleanerDelegate, BaseHFileCleanerDelegate, BaseLogCleanerDelegate, BaseTimeToLiveFileCleaner, HFileLinkCleaner, LongTermArchivingHFileCleaner, ManualMobMaintHFileCleaner, ReplicationHFileCleaner, ReplicationLogCleaner, SnapshotHFileCleaner, SnapshotScannerHDFSAclCleaner, TimeToLiveHFileCleaner, TimeToLiveLogCleaner, TimeToLiveMasterLocalStoreHFileCleaner, TimeToLiveMasterLocalStoreWALCleaner, TimeToLiveProcedureWALCleaner

@InterfaceAudience.Private
public interface FileCleanerDelegate
extends org.apache.hadoop.conf.Configurable, Stoppable

General interface for cleaning files from a folder (generally an archive or backup folder). These are chained via the CleanerChore to determine if a given file should be deleted.

Method Summary

Modifier and Type	Method and Description
Iterable<org.apache.hadoop.fs.FileStatus>	getDeletableFiles(Iterable<org.apache.hadoop.fs.FileStatus> files) Determines which of the given files are safe to delete
void	init(Map<String,Object> params) this method is used to pass some instance into subclass
default boolean	isEmptyDirDeletable(org.apache.hadoop.fs.Path dir) Check if a empty directory with no subdirs or subfiles can be deleted
default void	preClean() Used to do some initialize work before every period clean

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Methods inherited from interface org.apache.hadoop.hbase.Stoppable

isStopped, stop

Method Detail

getDeletableFiles

Iterable<org.apache.hadoop.fs.FileStatus> getDeletableFiles(Iterable<org.apache.hadoop.fs.FileStatus> files)

Determines which of the given files are safe to delete

Parameters:

files - files to check for deletion

Returns:

files that are ok to delete according to this cleaner

init

void init(Map<String,Object> params)

this method is used to pass some instance into subclass

preClean

default void preClean()

Used to do some initialize work before every period clean

isEmptyDirDeletable

default boolean isEmptyDirDeletable(org.apache.hadoop.fs.Path dir)

Check if a empty directory with no subdirs or subfiles can be deleted

Parameters:

dir - Path of the directory

Returns:

True if the directory can be deleted, otherwise false