org.apache.hadoop.hbase.master

Class CatalogJanitor

java.lang.Object

org.apache.hadoop.hbase.util.HasThread

org.apache.hadoop.hbase.Chore

org.apache.hadoop.hbase.master.CatalogJanitor

All Implemented Interfaces:

Runnable

@InterfaceAudience.Private
public class CatalogJanitor
extends Chore

A janitor for the catalog tables. Scans the hbase:meta catalog table on a period looking for unused regions to garbage collect.

Field Summary

Fields inherited from class org.apache.hadoop.hbase.Chore

stopper

Method Summary

Methods

Modifier and Type	Method and Description
protected void	chore() Look for chores.
boolean	cleanMergeQualifier(HRegionInfo region) Checks if the specified region has merge qualifiers, if so, try to clean them
protected boolean	initialChore() Override to run a task before we start looping.
boolean	setEnabled(boolean enabled)

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

choreForTesting, cleanup, run, sleep, triggerNow

Methods inherited from class org.apache.hadoop.hbase.util.HasThread

getName, getThread, interrupt, isAlive, isInterrupted, join, join, join, setDaemon, setName, setPriority, setUncaughtExceptionHandler, start

Methods inherited from class java.lang.Object

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

Method Detail

initialChore

protected boolean initialChore()

Description copied from class: Chore

Override to run a task before we start looping.

Overrides:

initialChore in class Chore

Returns:

true if initial chore was successful

setEnabled

public boolean setEnabled(boolean enabled)

Parameters:

enabled -

chore

protected void chore()

Description copied from class: Chore

Look for chores. If any found, do them else just return.

Specified by:

chore in class Chore

cleanMergeQualifier

public boolean cleanMergeQualifier(HRegionInfo region)
                            throws IOException

Checks if the specified region has merge qualifiers, if so, try to clean them

Parameters:

region -

Returns:

true if the specified region doesn't have merge qualifier now

Throws:

IOException