org.apache.druid.server.coordinator.rules

Class BroadcastDistributionRule

java.lang.Object

org.apache.druid.server.coordinator.rules.BroadcastDistributionRule

All Implemented Interfaces:

Rule

Direct Known Subclasses:

ForeverBroadcastDistributionRule, IntervalBroadcastDistributionRule, PeriodBroadcastDistributionRule

public abstract class BroadcastDistributionRule
extends Object
implements Rule

Constructor Summary

Constructors

Constructor and Description
BroadcastDistributionRule()

Method Summary

Modifier and Type	Method and Description
boolean	canLoadSegments() Return true if this Rule can load segment onto one or more type of Druid node, otherwise return false.
CoordinatorStats	run(DruidCoordinator coordinator, DruidCoordinatorRuntimeParams params, DataSegment segment) DruidCoordinatorRuntimeParams.getUsedSegments() must not be called in Rule's code, because the used segments are not specified for the DruidCoordinatorRuntimeParams passed into Rule's code.
void	updateUnderReplicated(Map<String,it.unimi.dsi.fastutil.objects.Object2LongMap<String>> underReplicatedPerTier, SegmentReplicantLookup segmentReplicantLookup, DataSegment segment) This method should update the with the replication count of the .

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.server.coordinator.rules.Rule

appliesTo, appliesTo, getType

Constructor Detail

BroadcastDistributionRule

public BroadcastDistributionRule()

Method Detail

run

public CoordinatorStats run(DruidCoordinator coordinator,
                            DruidCoordinatorRuntimeParams params,
                            DataSegment segment)

Description copied from interface: Rule

DruidCoordinatorRuntimeParams.getUsedSegments() must not be called in Rule's code, because the used segments are not specified for the DruidCoordinatorRuntimeParams passed into Rule's code. This is because DruidCoordinatorRuntimeParams entangles two slightly different (nonexistent yet) abstractions: "CoordinatorDutyParams" and "RuleParams" which contain params that only CoordinatorDuty objects and Rules need, respectively. For example, ReplicationThrottler needs to belong only to "RuleParams", but not to "CoordinatorDutyParams". The opposite for the collection of used segments and DataSourcesSnapshot. See https://github.com/apache/druid/issues/7228

Specified by:

run in interface Rule

canLoadSegments

public boolean canLoadSegments()

Description copied from interface: Rule

Return true if this Rule can load segment onto one or more type of Druid node, otherwise return false. Any Rule that returns true for this method should implement logic for calculating segment under replicated in Rule.updateUnderReplicated(java.util.Map<java.lang.String, it.unimi.dsi.fastutil.objects.Object2LongMap<java.lang.String>>, org.apache.druid.server.coordinator.SegmentReplicantLookup, org.apache.druid.timeline.DataSegment)

Specified by:

canLoadSegments in interface Rule

updateUnderReplicated

public void updateUnderReplicated(Map<String,it.unimi.dsi.fastutil.objects.Object2LongMap<String>> underReplicatedPerTier,
                                  SegmentReplicantLookup segmentReplicantLookup,
                                  DataSegment segment)

Description copied from interface: Rule

This method should update the with the replication count of the . Rule that returns true for Rule.canLoadSegments() must override this method. Note that is a map of tier -> { dataSource -> underReplicationCount }

Specified by:

updateUnderReplicated in interface Rule