org.apache.hadoop.hbase.master

Class SnapshotOfRegionAssignmentFromMeta

java.lang.Object

org.apache.hadoop.hbase.master.SnapshotOfRegionAssignmentFromMeta

@InterfaceAudience.Private
public class SnapshotOfRegionAssignmentFromMeta
extends Object

Used internally for reading meta and constructing datastructures that are then queried, for things like regions to regionservers, table to regions, etc. It also records the favored nodes mapping for regions.

Constructor Summary

Constructors

Constructor and Description
SnapshotOfRegionAssignmentFromMeta(Connection connection)
SnapshotOfRegionAssignmentFromMeta(Connection connection, Set<TableName> disabledTables, boolean excludeOfflinedSplitParents)

Method Summary

Modifier and Type	Method and Description
FavoredNodesPlan	getExistingAssignmentPlan() Get the favored nodes plan
Map<String,HRegionInfo>	getRegionNameToRegionInfoMap() Get the regioninfo for a region
Map<ServerName,List<HRegionInfo>>	getRegionServerToRegionMap() Get regionserver to region map
Map<HRegionInfo,ServerName>	getRegionToRegionServerMap() Get region to region server map
Set<TableName>	getTableSet() Get the table set
Map<TableName,List<HRegionInfo>>	getTableToRegionMap() Get regions for tables
void	initialize() Initialize the region assignment snapshot by scanning the hbase:meta table

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SnapshotOfRegionAssignmentFromMeta

public SnapshotOfRegionAssignmentFromMeta(Connection connection)

SnapshotOfRegionAssignmentFromMeta

public SnapshotOfRegionAssignmentFromMeta(Connection connection,
                                          Set<TableName> disabledTables,
                                          boolean excludeOfflinedSplitParents)

Method Detail

initialize

public void initialize()
                throws IOException

Initialize the region assignment snapshot by scanning the hbase:meta table

Throws:

IOException

getRegionNameToRegionInfoMap

public Map<String,HRegionInfo> getRegionNameToRegionInfoMap()

Get the regioninfo for a region

Returns:

the regioninfo

getTableToRegionMap

public Map<TableName,List<HRegionInfo>> getTableToRegionMap()

Get regions for tables

Returns:

a mapping from table to regions

getRegionToRegionServerMap

public Map<HRegionInfo,ServerName> getRegionToRegionServerMap()

Get region to region server map

Returns:

region to region server map

getRegionServerToRegionMap

public Map<ServerName,List<HRegionInfo>> getRegionServerToRegionMap()

Get regionserver to region map

Returns:

regionserver to region map

getExistingAssignmentPlan

public FavoredNodesPlan getExistingAssignmentPlan()

Get the favored nodes plan

Returns:

the existing favored nodes plan

getTableSet

public Set<TableName> getTableSet()

Get the table set

Returns:

the table set