zhuzhurk commented on a change in pull request #13284:
URL: https://github.com/apache/flink/pull/13284#discussion_r483957549
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/ExecutionSlotAllocatorFactory.java
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@@ -19,11 +19,39 @@
package org.apache.flink.runtime.scheduler;
+import org.apache.flink.runtime.clusterframework.types.AllocationID;
+import org.apache.flink.runtime.clusterframework.types.ResourceProfile;
+import org.apache.flink.runtime.jobmanager.scheduler.CoLocationGroupDesc;
+import org.apache.flink.runtime.jobmanager.scheduler.SlotSharingGroup;
+import org.apache.flink.runtime.scheduler.strategy.ExecutionVertexID;
+import org.apache.flink.runtime.scheduler.strategy.SchedulingTopology;
+
+import java.util.Set;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
/**
* Interface for {@link ExecutionSlotAllocator} factories.
*/
+@FunctionalInterface
public interface ExecutionSlotAllocatorFactory {
- ExecutionSlotAllocator createInstance(PreferredLocationsRetriever
preferredLocationsRetriever);
-
+ /**
+ * Instantiates the {@link ExecutionSlotAllocator}.
+ *
+ * @param preferredLocationsRetriever to retrieve preferred locations
for each execution
+ * @param resourceProfileRetriever to retrieve required {@link
ResourceProfile} for each execution
+ * @param priorAllocationIdRetriever to retrieve prior {@link
AllocationID} for each execution
+ * @param topology scheduling topology of the job
+ * @param logicalSlotSharingGroupSupplier to supply all slot sharing
groups in the job
+ * @param coLocationGroupSupplier to supply all co-location groups in
the job
+ * @return The instantiated slot allocator
+ */
+ ExecutionSlotAllocator createInstance(
+ PreferredLocationsRetriever preferredLocationsRetriever,
+ Function<ExecutionVertexID, ResourceProfile>
resourceProfileRetriever,
+ Function<ExecutionVertexID, AllocationID>
priorAllocationIdRetriever,
+ SchedulingTopology topology,
+ Supplier<Set<SlotSharingGroup>> logicalSlotSharingGroupSupplier,
+ Supplier<Set<CoLocationGroupDesc>> coLocationGroupSupplier);
Review comment:
One example is that if a user uses eager scheduling,
`getSlotSharingGroups()` and `getCoLocationGroupDescriptors()` will not be
invoked if we use supplier here because they will not be used.
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