org.apache.hadoop.hbase.master.snapshot

Class SnapshotHFileCleaner

java.lang.Object

BaseConfigurable

org.apache.hadoop.hbase.master.cleaner.BaseFileCleanerDelegate

org.apache.hadoop.hbase.master.cleaner.BaseHFileCleanerDelegate

org.apache.hadoop.hbase.master.snapshot.SnapshotHFileCleaner

All Implemented Interfaces:

FileCleanerDelegate

public class SnapshotHFileCleaner
extends BaseHFileCleanerDelegate

Implementation of a file cleaner that checks if a hfile is still used by snapshots of HBase tables.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	HFILE_CACHE_REFRESH_PERIOD_CONF_KEY Conf key for the frequency to attempt to refresh the cache of hfiles currently used in snapshots (ms)

Constructor Summary

Constructors

Constructor and Description
SnapshotHFileCleaner()

Method Summary

Modifier and Type	Method and Description
java.lang.Iterable<FileStatus>	getDeletableFiles(java.lang.Iterable<FileStatus> files) Determines which of the given files are safe to delete
SnapshotFileCache	getFileCacheForTesting() Exposed for Testing!
void	init(java.util.Map<java.lang.String,java.lang.Object> params) this method is used to pass some instance into subclass
protected boolean	isFileDeletable(FileStatus fStat) Should the master delete the file or keep it?
boolean	isStopped()
void	setConf(Configuration conf)
void	stop(java.lang.String why)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.master.cleaner.FileCleanerDelegate

preClean

Field Detail

HFILE_CACHE_REFRESH_PERIOD_CONF_KEY

public static final java.lang.String HFILE_CACHE_REFRESH_PERIOD_CONF_KEY

Conf key for the frequency to attempt to refresh the cache of hfiles currently used in snapshots (ms)

See Also:

Constant Field Values

Constructor Detail

SnapshotHFileCleaner

public SnapshotHFileCleaner()

Method Detail

getDeletableFiles

public java.lang.Iterable<FileStatus> getDeletableFiles(java.lang.Iterable<FileStatus> files)

Description copied from interface: FileCleanerDelegate

Determines which of the given files are safe to delete

Specified by:

getDeletableFiles in interface FileCleanerDelegate

Overrides:

getDeletableFiles in class BaseFileCleanerDelegate

Parameters:

files - files to check for deletion

Returns:

files that are ok to delete according to this cleaner

init

public void init(java.util.Map<java.lang.String,java.lang.Object> params)

Description copied from interface: FileCleanerDelegate

this method is used to pass some instance into subclass

Specified by:

init in interface FileCleanerDelegate

Overrides:

init in class BaseFileCleanerDelegate

isFileDeletable

protected boolean isFileDeletable(FileStatus fStat)

Description copied from class: BaseFileCleanerDelegate

Should the master delete the file or keep it?

Specified by:

isFileDeletable in class BaseFileCleanerDelegate

Parameters:

fStat - file status of the file to check

Returns:

true if the file is deletable, false if not

setConf

public void setConf(Configuration conf)

stop

public void stop(java.lang.String why)

Overrides:

stop in class BaseHFileCleanerDelegate

isStopped

public boolean isStopped()

Overrides:

isStopped in class BaseHFileCleanerDelegate

getFileCacheForTesting

public SnapshotFileCache getFileCacheForTesting()

Exposed for Testing!

Returns:

the cache of all hfiles