Package org.apache.hadoop.hbase.master.balancer

Class RegionPlanConditional

java.lang.Object

org.apache.hadoop.hbase.master.balancer.RegionPlanConditional

Direct Known Subclasses:

DistributeReplicasConditional, TableIsolationConditional

@LimitedPrivate("Configuration")
@Evolving
public abstract class RegionPlanConditional
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	RegionPlanConditional.ValidationLevel

Field Summary

Fields

Modifier and Type	Field	Description
private BalancerClusterState	cluster
private static final org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
RegionPlanConditional(org.apache.hadoop.conf.Configuration conf, BalancerClusterState cluster)

Method Summary

Modifier and Type	Method	Description
(package private) abstract List<RegionPlanConditionalCandidateGenerator>	getCandidateGenerators()	Get the candidate generator(s) for this conditional.
private Set<RegionInfo>	getRegionsFromIndex(int index, int[][] regionsPerIndex)
(package private) abstract RegionPlanConditional.ValidationLevel	getValidationLevel()	Returns a RegionPlanConditional.ValidationLevel that is appropriate for this conditional.
(package private) boolean	isViolating(RegionPlan regionPlan)	Check if the conditional is violated by the given region plan.
(package private) boolean	isViolatingHost(RegionPlan regionPlan, Set<RegionInfo> destinationRegions)
(package private) boolean	isViolatingRack(RegionPlan regionPlan, Set<RegionInfo> destinationRegions)
(package private) abstract boolean	isViolatingServer(RegionPlan regionPlan, Set<RegionInfo> destinationRegions)
(package private) void	setClusterState(BalancerClusterState cluster)

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

cluster

private BalancerClusterState cluster

Constructor Details

RegionPlanConditional

RegionPlanConditional(org.apache.hadoop.conf.Configuration conf,
 BalancerClusterState cluster)

Method Details

setClusterState

void setClusterState(BalancerClusterState cluster)

getValidationLevel

abstract RegionPlanConditional.ValidationLevel getValidationLevel()

Returns a RegionPlanConditional.ValidationLevel that is appropriate for this conditional.

Returns:

the validation level

getCandidateGenerators

abstract List<RegionPlanConditionalCandidateGenerator> getCandidateGenerators()

Get the candidate generator(s) for this conditional. This can be useful to provide the balancer with hints that will appease your conditional. Your conditionals will be triggered in order.

Returns:

the candidate generator for this conditional

isViolating

boolean isViolating(RegionPlan regionPlan)

Check if the conditional is violated by the given region plan.

Parameters:

regionPlan - the region plan to check

Returns:

true if the conditional is violated

isViolatingServer

abstract boolean isViolatingServer(RegionPlan regionPlan,
 Set<RegionInfo> destinationRegions)

isViolatingHost

boolean isViolatingHost(RegionPlan regionPlan,
 Set<RegionInfo> destinationRegions)

isViolatingRack

boolean isViolatingRack(RegionPlan regionPlan,
 Set<RegionInfo> destinationRegions)

getRegionsFromIndex

private Set<RegionInfo> getRegionsFromIndex(int index,
 int[][] regionsPerIndex)