org.apache.flink.runtime.jobmaster.slotpool

Class LocationPreferenceSchedulingStrategy

java.lang.Object

org.apache.flink.runtime.jobmaster.slotpool.LocationPreferenceSchedulingStrategy

All Implemented Interfaces:

SchedulingStrategy

Direct Known Subclasses:

PreviousAllocationSchedulingStrategy

public class LocationPreferenceSchedulingStrategy
extends Object
implements SchedulingStrategy

Default SchedulingStrategy which tries to match a slot with its location preferences.

Method Summary

Modifier and Type	Method and Description
<IN,OUT> OUT	findMatchWithLocality(SlotProfile slotProfile, java.util.stream.Stream<IN> candidates, java.util.function.Function<IN,SlotContext> contextExtractor, java.util.function.Predicate<IN> additionalRequirementsFilter, java.util.function.BiFunction<IN,Locality,OUT> resultProducer) This method takes the candidate slots, extracts slot contexts from them, filters them by the profile requirements and potentially by additional requirements, and produces a result from a match.
static LocationPreferenceSchedulingStrategy	getInstance()

Methods inherited from class java.lang.Object

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

Method Detail

findMatchWithLocality

@Nullable
public <IN,OUT> OUT findMatchWithLocality(@Nonnull
                                                    SlotProfile slotProfile,
                                                    @Nonnull
                                                    java.util.stream.Stream<IN> candidates,
                                                    @Nonnull
                                                    java.util.function.Function<IN,SlotContext> contextExtractor,
                                                    @Nonnull
                                                    java.util.function.Predicate<IN> additionalRequirementsFilter,
                                                    @Nonnull
                                                    java.util.function.BiFunction<IN,Locality,OUT> resultProducer)

Description copied from interface: SchedulingStrategy

This method takes the candidate slots, extracts slot contexts from them, filters them by the profile requirements and potentially by additional requirements, and produces a result from a match.

Specified by:

findMatchWithLocality in interface SchedulingStrategy

Type Parameters:

IN - type of the objects against we match the profile.

OUT - type of the produced output from a matching object.

Parameters:

slotProfile - slotProfile for which to find a matching slot

candidates - stream of candidates to match against.

contextExtractor - function to extract the SlotContext from the candidates.

additionalRequirementsFilter - predicate to specify additional requirements for each candidate.

resultProducer - function to produce a result from a matching candidate input.

Returns:

the result produced by resultProducer if a matching candidate was found or null otherwise.

getInstance

public static LocationPreferenceSchedulingStrategy getInstance()