/*
* 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.AllocationID;
import org.apache.flink.runtime.clusterframework.types.ResourceSlot;
import org.apache.flink.runtime.clusterframework.types.SlotID;
import org.apache.flink.runtime.resourcemanager.ResourceManagerServices;
import org.apache.flink.runtime.resourcemanager.SlotRequest;
import java.util.Iterator;
import java.util.Map;
/**
* A slot manager that answers requests with slots without any special logic. The first slot
* in the maps to match a request is chosen.
*/
public class DefaultSlotManager extends SlotManager {
public DefaultSlotManager(ResourceManagerServices rmServices) {
super(rmServices);
}
@Override
protected ResourceSlot chooseSlotToUse(SlotRequest request, Map<SlotID, ResourceSlot> freeSlots) {
final Iterator<ResourceSlot> slotIterator = freeSlots.values().iterator();
if (slotIterator.hasNext()) {
return slotIterator.next();
} else {
return null;
}
}
@Override
protected SlotRequest chooseRequestToFulfill(ResourceSlot offeredSlot, Map<AllocationID, SlotRequest> pendingRequests) {
final Iterator<SlotRequest> requestIterator = pendingRequests.values().iterator();
if (requestIterator.hasNext()) {
return requestIterator.next();
} else {
return null;
}
}
// ------------------------------------------------------------------------
public static class Factory implements SlotManagerFactory {
@Override
public SlotManager create(ResourceManagerServices rmServices) {
return new DefaultSlotManager(rmServices);
}
}
}