Package org.apache.hadoop.hbase.regionserver.handler

Class CloseRegionHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler

All Implemented Interfaces:

Comparable<EventHandler>, Runnable

Direct Known Subclasses:

CloseMetaHandler

@Private
public class CloseRegionHandler
extends EventHandler

Handles closing of a region on a region server.

In normal operation, we use UnassignRegionHandler closing Regions but when shutting down the region server and closing out Regions, we use this handler instead; it does not expect to be able to communicate the close back to the Master.

Expects that the close *has* been registered in the hosting RegionServer before submitting this Handler; i.e. rss.getRegionsInTransitionInRS().putIfAbsent( this.regionInfo.getEncodedNameAsBytes(), Boolean.FALSE); has been called first. In here when done, we do the deregister.

See Also:

• UnassignRegionHandler

Field Summary

Fields

Modifier and Type	Field	Description
private final boolean	abort
private ServerName	destination
private static final org.slf4j.Logger	LOG
private final RegionInfo	regionInfo
private final RegionServerServices	rsServices

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

eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CloseRegionHandler(Server server, RegionServerServices rsServices, RegionInfo regionInfo, boolean abort, EventType eventType, ServerName destination)
	CloseRegionHandler(Server server, RegionServerServices rsServices, RegionInfo regionInfo, boolean abort, ServerName destination)	This method used internally by the RegionServer to close out regions.

Method Summary

Modifier and Type	Method	Description
RegionInfo	getRegionInfo()
protected void	handleException(Throwable t)	Event exception handler, may be overridden
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, getPriority, getSeqid, prepare, run, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

LOG

private static final org.slf4j.Logger LOG

rsServices

private final RegionServerServices rsServices

regionInfo

private final RegionInfo regionInfo

abort

private final boolean abort

destination

private ServerName destination

Constructor Details

CloseRegionHandler

public CloseRegionHandler(Server server,
 RegionServerServices rsServices,
 RegionInfo regionInfo,
 boolean abort,
 ServerName destination)

This method used internally by the RegionServer to close out regions.

Parameters:

abort - If the regionserver is aborting.

CloseRegionHandler

protected CloseRegionHandler(Server server,
 RegionServerServices rsServices,
 RegionInfo regionInfo,
 boolean abort,
 EventType eventType,
 ServerName destination)

Method Details

getRegionInfo

public RegionInfo getRegionInfo()

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

handleException

protected void handleException(Throwable t)

Description copied from class: EventHandler

Event exception handler, may be overridden

Overrides:

handleException in class EventHandler

Parameters:

t - Throwable object