HFileLinkCleaner (Apache HBase 1.2.12 API)

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Summary:
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Constr |
Method

Detail:
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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.cleaner.HFileLinkCleaner

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, FileCleanerDelegate, Stoppable
```
@InterfaceAudience.LimitedPrivate(value="Configuration")
public class HFileLinkCleaner
extends BaseHFileCleanerDelegate
```
HFileLink cleaner that determines if a hfile should be deleted. HFiles can be deleted only if there're no links to them. When a HFileLink is created a back reference file is created in: /hbase/archive/table/region/cf/.links-hfile/ref-region.ref-table To check if the hfile can be deleted the back references folder must be empty.

Field Summary

Fields
Modifier and Type Field and Description

private org.apache.hadoop.fs.FileSystem fs

private static org.apache.commons.logging.Log LOG

Constructor Summary

Constructors
Constructor and Description

HFileLinkCleaner()

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`isFileDeletable(org.apache.hadoop.fs.FileStatus fStat)` Should the master delete the file or keep it?
`void`	`setConf(org.apache.hadoop.conf.Configuration conf)`

Methods inherited from class org.apache.hadoop.hbase.master.cleaner.BaseHFileCleanerDelegate
isStopped, stop

Methods inherited from class org.apache.hadoop.hbase.master.cleaner.BaseFileCleanerDelegate
getDeletableFiles, init

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
  - LOG
```
private static final org.apache.commons.logging.Log LOG
```
  - fs
```
private org.apache.hadoop.fs.FileSystem fs
```
- Constructor Detail
  - HFileLinkCleaner
```
public HFileLinkCleaner()
```
- Method Detail
  - isFileDeletable
```
public 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

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