org.apache.hadoop.hbase.regionserver

Interface FavoredNodesForRegion

All Known Subinterfaces:

RegionServerServices

All Known Implementing Classes:

HMaster, HMasterCommandLine.LocalHMaster, HRegionServer, MiniHBaseCluster.MiniHBaseClusterRegionServer, MockRegionServerServices, OOMERegionServer, TestAssignmentManagerOnCluster.MyMaster, TestAssignmentManagerOnCluster.MyRegionServer, TestMasterMetrics.MyMaster, TestMetaShutdownHandler.MyRegionServer, TestRegionServerReportForDuty.MyRegionServer, TestRSKilledWhenInitializing.MockedRegionServer, TestSplitTransactionOnCluster.MockMasterWithoutCatalogJanitor

@InterfaceAudience.LimitedPrivate(value="Coprocesssor")
 @InterfaceStability.Evolving
public interface FavoredNodesForRegion

Abstraction that allows different modules in RegionServer to update/get the favored nodes information for regions.

Method Summary

Modifier and Type	Method and Description
InetSocketAddress[]	getFavoredNodesForRegion(String encodedRegionName) Get the favored nodes mapping for this region.
void	updateRegionFavoredNodesMapping(String encodedRegionName, List<HBaseProtos.ServerName> favoredNodes) Used to update the favored nodes mapping when required.

Method Detail

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