org.apache.hadoop.hbase.master

Class CatalogJanitor

java.lang.Object

org.apache.hadoop.hbase.ScheduledChore

org.apache.hadoop.hbase.master.CatalogJanitor

All Implemented Interfaces:

Runnable

@InterfaceAudience.Private
public class CatalogJanitor
extends ScheduledChore

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

Method Summary

Methods

Modifier and Type	Method and Description
protected void	chore() The task to execute on each scheduled execution of the Chore
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.ScheduledChore

cancel, cancel, choreForTesting, cleanup, getInitialDelay, getName, getPeriod, getStopper, getTimeUnit, isInitialChoreComplete, isScheduled, run, toString, triggerNow

Methods inherited from class java.lang.Object

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

Method Detail

initialChore

protected boolean initialChore()

Description copied from class: ScheduledChore

Override to run a task before we start looping.

Overrides:

initialChore in class ScheduledChore

Returns:

true if initial chore was successful

setEnabled

public boolean setEnabled(boolean enabled)

Parameters:

enabled -

chore

protected void chore()

Description copied from class: ScheduledChore

The task to execute on each scheduled execution of the Chore

Specified by:

chore in class ScheduledChore

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