RegionStateListener (Apache HBase 1.2.12 API)

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Summary:
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Method

Detail:
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All Known Implementing Classes:

MasterQuotaManager
```
@InterfaceAudience.Private
public interface RegionStateListener
```
The listener interface for receiving region state events.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`onRegionMerged(HRegionInfo hri)` Process region merge event.
`void`	`onRegionSplit(HRegionInfo hri)` Process region split event.
`void`	`onRegionSplitReverted(HRegionInfo hri)` Process region split reverted event.

- Method Detail
  - onRegionSplit
```
void onRegionSplit(HRegionInfo hri)
                   throws IOException
```
    Process region split event.
    
    Parameters:
    hri - An instance of HRegionInfo
    
    Throws:
    
    IOException
  - onRegionSplitReverted
```
void onRegionSplitReverted(HRegionInfo hri)
                           throws IOException
```
    Process region split reverted event.
    
    Parameters:
    hri - An instance of HRegionInfo
    
    Throws:
    
    IOException - Signals that an I/O exception has occurred.
  - onRegionMerged
```
void onRegionMerged(HRegionInfo hri)
                    throws IOException
```
    Process region merge event.
    
    Parameters:
    hri - An instance of HRegionInfo
    
    Throws:
    
    IOException

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