| /** |
| * 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.policy; |
| |
| import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CSQueue; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * This will be used by |
| * {@link org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue} |
| * to decide allocation ordering of child queues. |
| */ |
| public interface QueueOrderingPolicy { |
| void setQueues(List<CSQueue> queues); |
| |
| /** |
| * Return an iterator over the collection of CSQueues which orders |
| * them for container assignment. |
| * |
| * Please note that, to avoid queue's set updated during sorting / iterating. |
| * Caller need to make sure parent queue's read lock is properly acquired. |
| * |
| * @param partition nodePartition |
| * |
| * @return iterator of queues to allocate |
| */ |
| Iterator<CSQueue> getAssignmentIterator(String partition); |
| |
| /** |
| * Returns configuration name (which will be used to set ordering policy |
| * @return configuration name |
| */ |
| String getConfigName(); |
| } |