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

@InterfaceAudience.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 and Description
private boolean	abort
private long	closeProcId
private ServerName	destination
private String	encodedName
private static org.slf4j.Logger	LOG
private RetryCounter	retryCounter

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

eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors

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

Method Summary

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

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

Constructor Detail

UnassignRegionHandler

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

Method Detail

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)