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

@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
java.net.InetSocketAddress[]	getFavoredNodesForRegion(java.lang.String encodedRegionName) Get the favored nodes mapping for this region.
void	updateRegionFavoredNodesMapping(java.lang.String encodedRegionName, java.util.List<HBaseProtos.ServerName> favoredNodes) Used to update the favored nodes mapping when required.

Method Detail

updateRegionFavoredNodesMapping

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

Used to update the favored nodes mapping when required.

Parameters:

encodedRegionName -

favoredNodes -

getFavoredNodesForRegion

java.net.InetSocketAddress[] getFavoredNodesForRegion(java.lang.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