java.lang.Object
- org.apache.flink.runtime.jobmaster.slotpool.LocationPreferenceSlotSelectionStrategy

All Implemented Interfaces:

SlotSelectionStrategy
```
public abstract class LocationPreferenceSlotSelectionStrategy
extends Object
implements SlotSelectionStrategy
```
This class implements a SlotSelectionStrategy that is based on location preference hints.

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.flink.runtime.jobmaster.slotpool.SlotSelectionStrategy
  SlotSelectionStrategy.SlotInfoAndLocality

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected abstract double`	`calculateCandidateScore(int localWeigh, int hostLocalWeigh, Supplier<Double> taskExecutorUtilizationSupplier)`
`static LocationPreferenceSlotSelectionStrategy`	`createDefault()`
`static LocationPreferenceSlotSelectionStrategy`	`createEvenlySpreadOut()`
`Optional<SlotSelectionStrategy.SlotInfoAndLocality>`	`selectBestSlotForProfile(FreeSlotTracker freeSlotTracker, SlotProfile slotProfile)`	Selects the best `SlotInfo` w.r.t. a certain selection criterion from the provided list of available slots and considering the given `SlotProfile` that describes the requirements.
`protected abstract Optional<SlotSelectionStrategy.SlotInfoAndLocality>`	`selectWithoutLocationPreference(FreeSlotTracker freeSlotTracker, ResourceProfile resourceProfile)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

selectBestSlotForProfile

public Optional<SlotSelectionStrategy.SlotInfoAndLocality> selectBestSlotForProfile(@Nonnull
                                                                                    FreeSlotTracker freeSlotTracker,
                                                                                    @Nonnull
                                                                                    SlotProfile slotProfile)

Description copied from interface: SlotSelectionStrategy

Selects the best SlotInfo w.r.t. a certain selection criterion from the provided list of available slots and considering the given SlotProfile that describes the requirements.

Specified by:: selectBestSlotForProfile in interface SlotSelectionStrategy
Parameters:: freeSlotTracker - a list of the available slots together with their remaining resources to select from.; slotProfile - a slot profile, describing requirements for the slot selection.
Returns:: the selected slot info with the corresponding locality hint.

selectWithoutLocationPreference

@Nonnull
protected abstract Optional<SlotSelectionStrategy.SlotInfoAndLocality> selectWithoutLocationPreference(@Nonnull
                                                                                                       FreeSlotTracker freeSlotTracker,
                                                                                                       @Nonnull
                                                                                                       ResourceProfile resourceProfile)

calculateCandidateScore

protected abstract double calculateCandidateScore(int localWeigh,
                                                  int hostLocalWeigh,
                                                  Supplier<Double> taskExecutorUtilizationSupplier)

createDefault

public static LocationPreferenceSlotSelectionStrategy createDefault()

createEvenlySpreadOut

public static LocationPreferenceSlotSelectionStrategy createEvenlySpreadOut()

Class LocationPreferenceSlotSelectionStrategy

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.jobmaster.slotpool.SlotSelectionStrategy