DispatchMergingRegionHandler (Apache HBase 1.2.12 API)

java.lang.Object
- org.apache.hadoop.hbase.executor.EventHandler
- - org.apache.hadoop.hbase.master.handler.DispatchMergingRegionHandler

All Implemented Interfaces:

Comparable<Runnable>, Runnable
```
@InterfaceAudience.Private
public class DispatchMergingRegionHandler
extends EventHandler
```
Handles MERGE regions request on master: move the regions together(on the same regionserver) and send MERGE RPC to regionserver. NOTE:The real merge is executed on the regionserver

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.hadoop.hbase.executor.EventHandler
  EventHandler.EventHandlerListener

Field Summary

Fields
Modifier and Type	Field and Description
`private CatalogJanitor`	`catalogJanitor`
`private boolean`	`forcible`
`private static org.apache.commons.logging.Log`	`LOG`
`private MasterServices`	`masterServices`
`private HRegionInfo`	`region_a`
`private HRegionInfo`	`region_b`
`private int`	`timeout`

Fields inherited from class org.apache.hadoop.hbase.executor.EventHandler
eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors
Constructor and Description
`DispatchMergingRegionHandler(MasterServices services, CatalogJanitor catalogJanitor, HRegionInfo region_a, HRegionInfo region_b, boolean forcible)`

Method Summary

Methods
Modifier and Type	Method and Description
`private RegionLoad`	`getRegionLoad(ServerName sn, HRegionInfo hri)`
`void`	`process()` This method is the main processing loop to be implemented by the various subclasses.

Methods inherited from class org.apache.hadoop.hbase.executor.EventHandler
compareTo, getEventType, getInformativeName, getListener, getPriority, getSeqid, handleException, prepare, run, setListener, toString

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

Field Detail

LOG

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

masterServices

private final MasterServices masterServices

catalogJanitor

private final CatalogJanitor catalogJanitor

region_a
```
private HRegionInfo region_a
```

region_b
```
private HRegionInfo region_b
```

forcible
```
private final boolean forcible
```

timeout
```
private final int timeout
```

Constructor Detail

DispatchMergingRegionHandler

public DispatchMergingRegionHandler(MasterServices services,
                            CatalogJanitor catalogJanitor,
                            HRegionInfo region_a,
                            HRegionInfo region_b,
                            boolean forcible)

Method Detail
- process
```
public void process()
             throws IOException
```
  Description copied from class: EventHandler
  
  This method is the main processing loop to be implemented by the various subclasses.
  
  Specified by:
  
  process in class EventHandler
  
  Throws:
  
  IOException
- getRegionLoad
```
private RegionLoad getRegionLoad(ServerName sn,
                       HRegionInfo hri)
```

Class DispatchMergingRegionHandler

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.executor.EventHandler

Field Summary

Fields inherited from class org.apache.hadoop.hbase.executor.EventHandler

Constructor Summary

Method Summary

Methods inherited from class org.apache.hadoop.hbase.executor.EventHandler

Methods inherited from class java.lang.Object

Field Detail

LOG

masterServices

catalogJanitor

region_a

region_b

forcible

timeout

Constructor Detail

DispatchMergingRegionHandler

Method Detail

process

getRegionLoad