org.apache.hadoop.hbase.regionserver

Interface RegionServerServices

All Superinterfaces:

PriorityFunction

All Known Implementing Classes:

HRegionServer

@InterfaceAudience.Private
public interface RegionServerServices
extends PriorityFunction

Services provided by HRegionServer

Method Summary

Methods

Modifier and Type	Method and Description
void	addToOnlineRegions(HRegion r) Add to online regions.
CatalogTracker	getCatalogTracker()
CompactionRequestor	getCompactionRequester()
ExecutorService	getExecutorService()
InetSocketAddress[]	getFavoredNodesForRegion(String encodedRegionName) Get the favored nodes mapping for this region.
org.apache.hadoop.fs.FileSystem	getFileSystem()
FlushRequester	getFlushRequester()
HRegion	getFromOnlineRegions(String encodedRegionName) Return HRegion instance.
Leases	getLeases()
ServerNonceManager	getNonceManager() Only required for "old" log replay; if it's removed, remove this.
List<HRegion>	getOnlineRegions(TableName tableName) Get all online regions of a table in this RS.
Map<String,HRegion>	getRecoveringRegions()
RegionServerAccounting	getRegionServerAccounting()
ConcurrentMap<byte[],Boolean>	getRegionsInTransitionInRS() Get the regions that are currently being opened or closed in the RS
RpcServerInterface	getRpcServer() Returns a reference to the region server's RPC server
TableLockManager	getTableLockManager()
HLog	getWAL(HRegionInfo regionInfo)
boolean	isStopping()
void	postOpenDeployTasks(HRegion r, CatalogTracker ct) Tasks to perform after region open to complete deploy of region on regionserver
boolean	removeFromOnlineRegions(HRegion r, ServerName destination) This method removes HRegion corresponding to hri from the Map of onlineRegions.
boolean	reportRegionTransition(RegionServerStatusProtos.RegionTransition.TransitionCode code, HRegionInfo... hris) Notify master that a handler requests to change a region state
boolean	reportRegionTransition(RegionServerStatusProtos.RegionTransition.TransitionCode code, long openSeqNum, HRegionInfo... hris) Notify master that a handler requests to change a region state
void	updateRegionFavoredNodesMapping(String encodedRegionName, List<HBaseProtos.ServerName> favoredNodes) Used to update the favored nodes mapping when required.

Methods inherited from interface org.apache.hadoop.hbase.Server

getConfiguration, getServerName, getZooKeeper

Methods inherited from interface org.apache.hadoop.hbase.Abortable

abort, isAborted

Methods inherited from interface org.apache.hadoop.hbase.Stoppable

isStopped, stop

Methods inherited from interface org.apache.hadoop.hbase.ipc.PriorityFunction

getPriority

Method Detail

isStopping

boolean isStopping()

Returns:

True if this regionserver is stopping.

getWAL

HLog getWAL(HRegionInfo regionInfo)
            throws IOException

Returns:

the HLog for a particular region. Pass null for getting the default (common) WAL

Throws:

IOException

getCompactionRequester

CompactionRequestor getCompactionRequester()

Returns:

Implementation of CompactionRequestor or null.

getFlushRequester

FlushRequester getFlushRequester()

Returns:

Implementation of FlushRequester or null.

getRegionServerAccounting

RegionServerAccounting getRegionServerAccounting()

Returns:

the RegionServerAccounting for this Region Server

getTableLockManager

TableLockManager getTableLockManager()

Returns:

RegionServer's instance of TableLockManager

postOpenDeployTasks

void postOpenDeployTasks(HRegion r,
                       CatalogTracker ct)
                         throws org.apache.zookeeper.KeeperException,
                                IOException

Tasks to perform after region open to complete deploy of region on regionserver

Parameters:

r - Region to open.

ct - Instance of CatalogTracker

Throws:

org.apache.zookeeper.KeeperException

IOException

reportRegionTransition

boolean reportRegionTransition(RegionServerStatusProtos.RegionTransition.TransitionCode code,
                             long openSeqNum,
                             HRegionInfo... hris)

Notify master that a handler requests to change a region state

reportRegionTransition

boolean reportRegionTransition(RegionServerStatusProtos.RegionTransition.TransitionCode code,
                             HRegionInfo... hris)

Notify master that a handler requests to change a region state

getRpcServer

RpcServerInterface getRpcServer()

Returns a reference to the region server's RPC server

getRegionsInTransitionInRS

ConcurrentMap<byte[],Boolean> getRegionsInTransitionInRS()

Get the regions that are currently being opened or closed in the RS

Returns:

map of regions in transition in this RS

getFileSystem

org.apache.hadoop.fs.FileSystem getFileSystem()

Returns:

Return the FileSystem object used by the regionserver

getLeases

Leases getLeases()

Returns:

The RegionServer's "Leases" service

getExecutorService

ExecutorService getExecutorService()

Returns:

hbase executor service

getCatalogTracker

CatalogTracker getCatalogTracker()

Returns:

The RegionServer's CatalogTracker

getRecoveringRegions

Map<String,HRegion> getRecoveringRegions()

Returns:

set of recovering regions on the hosting region server

getNonceManager

ServerNonceManager getNonceManager()

Only required for "old" log replay; if it's removed, remove this.

Returns:

The RegionServer's NonceManager

addToOnlineRegions

void addToOnlineRegions(HRegion r)

Add to online regions.

Parameters:

r -

removeFromOnlineRegions

boolean removeFromOnlineRegions(HRegion r,
                              ServerName destination)

This method removes HRegion corresponding to hri from the Map of onlineRegions.

Parameters:

r - Region to remove.

destination - Destination, if any, null otherwise.

Returns:

True if we removed a region from online list.

getFromOnlineRegions

HRegion getFromOnlineRegions(String encodedRegionName)

Return HRegion instance. Only works if caller is in same context, in same JVM. HRegion is not serializable.

Parameters:

encodedRegionName -

Returns:

HRegion for the passed encoded encodedRegionName or null if named region is not member of the online regions.

getOnlineRegions

List<HRegion> getOnlineRegions(TableName tableName)
                               throws IOException

Get all online regions of a table in this RS.

Parameters:

tableName -

Returns:

List of HRegion

Throws:

IOException

updateRegionFavoredNodesMapping

void updateRegionFavoredNodesMapping(String encodedRegionName,
                                   List<HBaseProtos.ServerName> favoredNodes)

Used to update the favored nodes mapping when required.

Parameters:

encodedRegionName -

favoredNodes -

getFavoredNodesForRegion

InetSocketAddress[] getFavoredNodesForRegion(String encodedRegionName)

Get the favored nodes mapping for this region. Used when the HDFS create API is invoked to pass in favored nodes hints for new region files.

Parameters:

encodedRegionName -

Returns:

array containing the favored nodes' InetSocketAddresses