LogRoller (Apache HBase 1.4.11 API)

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Summary:
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java.lang.Object
- org.apache.hadoop.hbase.util.HasThread
- - org.apache.hadoop.hbase.regionserver.LogRoller

All Implemented Interfaces:

Runnable
```
@InterfaceAudience.Private
public class LogRoller
extends HasThread
```
Runs periodically to determine if the WAL should be rolled. NOTE: This class extends Thread rather than Chore because the sleep time can be interrupted when there is something to do, rather than the Chore sleep time which is invariant. TODO: change to a pool of threads

- Field Summary
  
  Fields
  Modifier and Type Field and Description
  
  protected RegionServerServices services
- Constructor Summary
  
  Constructors
  Constructor and Description
  
  LogRoller(Server server, RegionServerServices services)
- Method Summary
  
  Methods
  Modifier and Type Method and Description
  
  void addWAL(WAL wal)
  
  void interrupt()
  
  void requestRollAll()
  
  void run()
  
  boolean walRollFinished()
  For testing only
  - Methods inherited from class org.apache.hadoop.hbase.util.HasThread
    getName, getThread, 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

- Field Detail
  - services
```
protected final RegionServerServices services
```
- Constructor Detail
  - LogRoller
```
public LogRoller(Server server,
         RegionServerServices services)
```
    Parameters:
    server -
- Method Detail
  - addWAL
```
public void addWAL(WAL wal)
```
  - requestRollAll
```
public void requestRollAll()
```
  - interrupt
```
public void interrupt()
```
    Overrides:
    
    interrupt in class HasThread
  - run
```
public void run()
```
    Specified by:
    
    run in interface Runnable
    
    Specified by:
    
    run in class HasThread
  - walRollFinished
```
public boolean walRollFinished()
```
    For testing only
    
    Returns:
    true if all WAL roll finished

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