CatalogJanitor (Apache HBase 1.4.11 API)

All Classes

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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

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