org.apache.druid.server.coordinator.duty

Interface CoordinatorDuty

All Known Subinterfaces:

CoordinatorCustomDuty

All Known Implementing Classes:

BalanceSegments, CompactSegments, EmitClusterStatsAndMetrics, KillAuditLog, KillCompactionConfig, KillDatasourceMetadata, KillRules, KillStalePendingSegments, KillSupervisors, KillSupervisorsCustomDuty, KillUnusedSegments, LogUsedSegments, MarkAsUnusedOvershadowedSegments, RunRules, UnloadUnusedSegments

public interface CoordinatorDuty

Method Summary

Modifier and Type	Method and Description
DruidCoordinatorRuntimeParams	run(DruidCoordinatorRuntimeParams params) Implementations of this method run various activities performed by the coordinator.

Method Detail

run

@Nullable
DruidCoordinatorRuntimeParams run(DruidCoordinatorRuntimeParams params)

Implementations of this method run various activities performed by the coordinator. Input params can be used and modified. The returned DruidCoordinatorRuntimeParams is passed to the next duty.

Returns:

same as input or a modified value to be used by next duty. Null return values will prevent subsequent CoordinatorDuty objects (see the order in the lists passed into the constructor of DruidCoordinator.DutiesRunnable) from running until the next cycle.