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

java.lang.Object
  org.apache.hadoop.hbase.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:

org.apache.hadoop.conf.Configurable, FileCleanerDelegate, Stoppable

@InterfaceAudience.LimitedPrivate(value="Configuration")
@InterfaceStability.Evolving
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

static 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

SnapshotHFileCleaner()

Method Summary

Iterable<org.apache.hadoop.fs.FileStatus>	getDeletableFiles(Iterable<org.apache.hadoop.fs.FileStatus> files) Determines which of the given files are safe to delete
SnapshotFileCache	getFileCacheForTesting() Exposed for Testing!
protected boolean	isFileDeletable(org.apache.hadoop.fs.FileStatus fStat) Should the master delete the file or keep it?
boolean	isStopped()
void	setConf(org.apache.hadoop.conf.Configuration conf)
void	stop(String why)

Methods inherited from class org.apache.hadoop.hbase.BaseConfigurable

getConf

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.conf.Configurable

getConf

Field Detail

HFILE_CACHE_REFRESH_PERIOD_CONF_KEY

public static final 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 Iterable<org.apache.hadoop.fs.FileStatus> getDeletableFiles(Iterable<org.apache.hadoop.fs.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

isFileDeletable

protected boolean isFileDeletable(org.apache.hadoop.fs.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(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

Overrides:

setConf in class BaseConfigurable

stop

public void stop(String why)

Specified by:

stop in interface Stoppable

Overrides:

stop in class BaseHFileCleanerDelegate

isStopped

public boolean isStopped()

Specified by:

isStopped in interface Stoppable

Overrides:

isStopped in class BaseHFileCleanerDelegate

getFileCacheForTesting

public SnapshotFileCache getFileCacheForTesting()

Exposed for Testing!

Returns:

the cache of all hfiles