org.apache.hadoop.hbase.regionserver.handler

Class OpenRegionHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler

All Implemented Interfaces:

Comparable<Runnable>, Runnable

Direct Known Subclasses:

OpenMetaHandler

@InterfaceAudience.Private
public class OpenRegionHandler
extends EventHandler

Handles opening of a region on a region server.

This is executed after receiving an OPEN RPC from the master or client.

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
protected RegionServerServices	rsServices

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

eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors

Modifier	Constructor and Description
	OpenRegionHandler(Server server, RegionServerServices rsServices, HRegionInfo regionInfo, HTableDescriptor htd)
protected	OpenRegionHandler(Server server, RegionServerServices rsServices, HRegionInfo regionInfo, HTableDescriptor htd, EventType eventType, int versionOfOfflineNode)
	OpenRegionHandler(Server server, RegionServerServices rsServices, HRegionInfo regionInfo, HTableDescriptor htd, int versionOfOfflineNode)

Method Summary

Methods

Modifier and Type	Method and Description
HRegionInfo	getRegionInfo()
void	process() This method is the main processing loop to be implemented by the various subclasses.
static boolean	tryTransitionFromOfflineToFailedOpen(RegionServerServices rsServices, HRegionInfo hri, int versionOfOfflineNode) Try to transition to open.

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

rsServices

protected final RegionServerServices rsServices

Constructor Detail

OpenRegionHandler

public OpenRegionHandler(Server server,
                 RegionServerServices rsServices,
                 HRegionInfo regionInfo,
                 HTableDescriptor htd)

OpenRegionHandler

public OpenRegionHandler(Server server,
                 RegionServerServices rsServices,
                 HRegionInfo regionInfo,
                 HTableDescriptor htd,
                 int versionOfOfflineNode)

OpenRegionHandler

protected OpenRegionHandler(Server server,
                 RegionServerServices rsServices,
                 HRegionInfo regionInfo,
                 HTableDescriptor htd,
                 EventType eventType,
                 int versionOfOfflineNode)

Method Detail

getRegionInfo

public HRegionInfo 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

tryTransitionFromOfflineToFailedOpen

public static boolean tryTransitionFromOfflineToFailedOpen(RegionServerServices rsServices,
                                           HRegionInfo hri,
                                           int versionOfOfflineNode)

Try to transition to open. This function is static to make it usable before creating the handler. This is not guaranteed to succeed, we just do our best.

Parameters:

rsServices -

hri - Region we're working on.

versionOfOfflineNode - version to checked.

Returns:

whether znode is successfully transitioned to FAILED_OPEN state.