org.apache.flink.runtime.resourcemanager.slotmanager.SlotMatchingStrategy Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.runtime.resourcemanager.slotmanager;
import org.apache.flink.runtime.clusterframework.types.ResourceProfile;
import org.apache.flink.runtime.instance.InstanceID;
import java.util.Collection;
import java.util.Optional;
import java.util.function.Function;
/**
* Strategy how to find a matching slot.
*/
public interface SlotMatchingStrategy {
/**
* Finds a matching slot for the requested {@link ResourceProfile} given the
* collection of free slots and the total number of slots per TaskExecutor.
*
* @param requestedProfile to find a matching slot for
* @param freeSlots collection of free slots
* @param numberRegisteredSlotsLookup lookup for the number of registered slots
* @return Returns a matching slots or {@link Optional#empty()} if there is none
*/
Optional findMatchingSlot(
ResourceProfile requestedProfile,
Collection freeSlots,
Function numberRegisteredSlotsLookup);
}