Package org.apache.hadoop.hdfs.server.blockmanagement

Class BlockPlacementStatusWithNodeGroup

java.lang.Object

org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementStatusWithNodeGroup

All Implemented Interfaces:

BlockPlacementStatus

@Private
@Evolving
public class BlockPlacementStatusWithNodeGroup
extends Object
implements BlockPlacementStatus

An implementation of @see BlockPlacementStatus for

See Also:

• BlockPlacementPolicyWithNodeGroup

Constructor Summary

Constructors

Constructor	Description
BlockPlacementStatusWithNodeGroup(BlockPlacementStatus parentBlockPlacementStatus, Set<String> currentNodeGroups, int requiredNodeGroups)

Method Summary

Modifier and Type	Method	Description
int	getAdditionalReplicasRequired()	Return the number of additional replicas needed to ensure the block placement policy is satisfied.
String	getErrorDescription()	Get description info for log or printed in case replicas are failed to meet requirement of placement policy
boolean	isPlacementPolicySatisfied()	Boolean value to identify if replicas of this block satisfy requirement of placement policy

Methods inherited from class java.lang.Object

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

Constructor Details

BlockPlacementStatusWithNodeGroup

public BlockPlacementStatusWithNodeGroup(BlockPlacementStatus parentBlockPlacementStatus,
 Set<String> currentNodeGroups,
 int requiredNodeGroups)

Parameters:

parentBlockPlacementStatus - the parent class' status

currentNodeGroups - the current set of node groups of the replicas

requiredNodeGroups - the number of required node groups

Method Details

isPlacementPolicySatisfied

public boolean isPlacementPolicySatisfied()

Description copied from interface: BlockPlacementStatus

Boolean value to identify if replicas of this block satisfy requirement of placement policy

Specified by:

isPlacementPolicySatisfied in interface BlockPlacementStatus

Returns:

if replicas satisfy placement policy's requirement

getErrorDescription

public String getErrorDescription()

Description copied from interface: BlockPlacementStatus

Get description info for log or printed in case replicas are failed to meet requirement of placement policy

Specified by:

getErrorDescription in interface BlockPlacementStatus

Returns:

description in case replicas are failed to meet requirement of placement policy

getAdditionalReplicasRequired

public int getAdditionalReplicasRequired()

Description copied from interface: BlockPlacementStatus

Return the number of additional replicas needed to ensure the block placement policy is satisfied.

Specified by:

getAdditionalReplicasRequired in interface BlockPlacementStatus

Returns:

The number of new replicas needed to satisify the placement policy or zero if no extra are needed