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

Class UnassignRegionHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

org.apache.hadoop.hbase.regionserver.handler.UnassignRegionHandler

All Implemented Interfaces:

Comparable<EventHandler>, Runnable

@Private
public class UnassignRegionHandler
extends EventHandler

Handles closing of a region on a region server.

Just done the same thing with the old CloseRegionHandler, with some modifications on fencing and retrying. But we need to keep the CloseRegionHandler as is to keep compatible with the zk less assignment for 1.x, otherwise it is not possible to do rolling upgrade.

Field Summary

Fields

Modifier and Type	Field	Description
private final boolean	abort
private final long	closeProcId
private final ServerName	destination
private final String	encodedName
private boolean	evictCache
private static final org.slf4j.Logger	LOG
private final RetryCounter	retryCounter

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

eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors

Constructor	Description
UnassignRegionHandler(HRegionServer server, String encodedName, long closeProcId, boolean abort, ServerName destination, EventType eventType)
UnassignRegionHandler(HRegionServer server, String encodedName, long closeProcId, boolean abort, ServerName destination, EventType eventType, boolean evictCache)

Method Summary

Modifier and Type	Method	Description
static UnassignRegionHandler	create(HRegionServer server, String encodedName, long closeProcId, boolean abort, ServerName destination, boolean evictCache)
private HRegionServer	getServer()
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

encodedName

private final String encodedName

closeProcId

private final long closeProcId

abort

private final boolean abort

destination

private final ServerName destination

retryCounter

private final RetryCounter retryCounter

evictCache

private boolean evictCache

Constructor Details

UnassignRegionHandler

public UnassignRegionHandler(HRegionServer server,
 String encodedName,
 long closeProcId,
 boolean abort,
 @Nullable
 ServerName destination,
 EventType eventType)

UnassignRegionHandler

public UnassignRegionHandler(HRegionServer server,
 String encodedName,
 long closeProcId,
 boolean abort,
 @Nullable
 ServerName destination,
 EventType eventType,
 boolean evictCache)

Method Details

getServer

private HRegionServer getServer()

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

create

public static UnassignRegionHandler create(HRegionServer server,
 String encodedName,
 long closeProcId,
 boolean abort,
 @Nullable
 ServerName destination,
 boolean evictCache)