org.apache.hadoop.hbase.favored

Class FavoredNodesPlan

java.lang.Object

org.apache.hadoop.hbase.favored.FavoredNodesPlan

@InterfaceAudience.Private
public class FavoredNodesPlan
extends Object

This class contains the mapping information between each region name and its favored region server list. Used by FavoredNodeLoadBalancer set of classes and from unit tests (hence the class is public) All the access to this class is thread-safe.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FavoredNodesPlan.Position

Constructor Summary

Constructors

Constructor and Description
FavoredNodesPlan()

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
Map<String,List<ServerName>>	getAssignmentMap() Return the mapping between each region to its favored region server list.
List<ServerName>	getFavoredNodes(RegionInfo region) Returns the list of favored region server for this region based on the plan
static FavoredNodesPlan.Position	getFavoredServerPosition(List<ServerName> favoredNodes, ServerName server) Return the position of the server in the favoredNodes list.
int	hashCode()
int	size()
void	updateFavoredNodesMap(RegionInfo region, List<ServerName> servers) Update an assignment to the plan

Methods inherited from class java.lang.Object

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

Constructor Detail

FavoredNodesPlan

public FavoredNodesPlan()

Method Detail

updateFavoredNodesMap

public void updateFavoredNodesMap(RegionInfo region,
                                  List<ServerName> servers)

Update an assignment to the plan

getFavoredNodes

public List<ServerName> getFavoredNodes(RegionInfo region)

Returns the list of favored region server for this region based on the plan

getFavoredServerPosition

public static FavoredNodesPlan.Position getFavoredServerPosition(List<ServerName> favoredNodes,
                                                                 ServerName server)

Return the position of the server in the favoredNodes list. Assumes the favoredNodes list is of size 3.

getAssignmentMap

public Map<String,List<ServerName>> getAssignmentMap()

Return the mapping between each region to its favored region server list.

size

public int size()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object