StorefileRefresherChore (Apache HBase 1.4.11 API)

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java.lang.Object
- org.apache.hadoop.hbase.ScheduledChore
- - org.apache.hadoop.hbase.regionserver.StorefileRefresherChore

All Implemented Interfaces:

Runnable
```
@InterfaceAudience.Private
public class StorefileRefresherChore
extends ScheduledChore
```
A chore for refreshing the store files for secondary regions hosted in the region server. This chore should run periodically with a shorter interval than HFile TTL ("hbase.master.hfilecleaner.ttl", default 5 minutes). It ensures that if we cannot refresh files longer than that amount, the region will stop serving read requests because the referenced files might have been deleted (by the primary region).

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`REGIONSERVER_META_STOREFILE_REFRESH_PERIOD` Whether all storefiles should be refreshed, as opposed to just hbase:meta's Meta region doesn't have WAL replication for replicas enabled yet
`static String`	`REGIONSERVER_STOREFILE_REFRESH_PERIOD` The period (in milliseconds) for refreshing the store files for the secondary regions.

Constructor Summary

Constructors
Constructor and Description
`StorefileRefresherChore(int period, boolean onlyMetaRefresh, HRegionServer regionServer, Stoppable stoppable)`

Method Summary

Methods
Modifier and Type	Method and Description
`protected void`	`chore()` The task to execute on each scheduled execution of the Chore
`protected boolean`	`isRegionStale(String encodedName, long time)`

Methods inherited from class org.apache.hadoop.hbase.ScheduledChore
cancel, cancel, choreForTesting, cleanup, getInitialDelay, getName, getPeriod, getStopper, getTimeUnit, initialChore, isInitialChoreComplete, isScheduled, run, toString, triggerNow

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - REGIONSERVER_STOREFILE_REFRESH_PERIOD
```
public static final String REGIONSERVER_STOREFILE_REFRESH_PERIOD
```
    The period (in milliseconds) for refreshing the store files for the secondary regions.
    
    See Also:
    Constant Field Values
  - REGIONSERVER_META_STOREFILE_REFRESH_PERIOD
```
public static final String REGIONSERVER_META_STOREFILE_REFRESH_PERIOD
```
    Whether all storefiles should be refreshed, as opposed to just hbase:meta's Meta region doesn't have WAL replication for replicas enabled yet
    
    See Also:
    Constant Field Values
- Constructor Detail
  - StorefileRefresherChore
```
public StorefileRefresherChore(int period,
                       boolean onlyMetaRefresh,
                       HRegionServer regionServer,
                       Stoppable stoppable)
```
- Method Detail
  - 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
  - isRegionStale
```
protected boolean isRegionStale(String encodedName,
                    long time)
```

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