| /** |
| * 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.hadoop.yarn.server.resourcemanager.scheduler.capacity; |
| |
| import java.util.Comparator; |
| |
| import org.apache.hadoop.yarn.server.resourcemanager.nodelabels.RMNodeLabelsManager; |
| |
| public class PartitionedQueueComparator implements Comparator<CSQueue> { |
| private String partitionToLookAt = null; |
| |
| public void setPartitionToLookAt(String partitionToLookAt) { |
| this.partitionToLookAt = partitionToLookAt; |
| } |
| |
| |
| @Override |
| public int compare(CSQueue q1, CSQueue q2) { |
| /* |
| * 1. Check accessible to given partition, if one queue accessible and |
| * the other not, accessible queue goes first. |
| */ |
| boolean q1Accessible = |
| q1.getAccessibleNodeLabels().contains(partitionToLookAt) |
| || q1.getAccessibleNodeLabels().contains(RMNodeLabelsManager.ANY); |
| boolean q2Accessible = |
| q2.getAccessibleNodeLabels().contains(partitionToLookAt) |
| || q2.getAccessibleNodeLabels().contains(RMNodeLabelsManager.ANY); |
| if (q1Accessible && !q2Accessible) { |
| return -1; |
| } else if (!q1Accessible && q2Accessible) { |
| return 1; |
| } |
| |
| /* |
| * |
| * 2. When two queue has same accessibility, check who will go first: |
| * Now we simply compare their used resource on the partition to lookAt |
| */ |
| float used1 = q1.getQueueCapacities().getUsedCapacity(partitionToLookAt); |
| float used2 = q2.getQueueCapacities().getUsedCapacity(partitionToLookAt); |
| if (Math.abs(used1 - used2) < 1e-6) { |
| // When used capacity is same, compare their guaranteed-capacity |
| float cap1 = q1.getQueueCapacities().getCapacity(partitionToLookAt); |
| float cap2 = q2.getQueueCapacities().getCapacity(partitionToLookAt); |
| |
| // when cap1 == cap2, we will compare queue's name |
| if (Math.abs(cap1 - cap2) < 1e-6) { |
| return q1.getQueueName().compareTo(q2.getQueueName()); |
| } |
| return Float.compare(cap2, cap1); |
| } |
| |
| return Float.compare(used1, used2); |
| } |
| } |