| /** |
| * 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.placement; |
| |
| import java.util.List; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock; |
| |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| public class PlacementManager { |
| private static final Log LOG = LogFactory.getLog(PlacementManager.class); |
| |
| List<PlacementRule> rules; |
| ReadLock readLock; |
| WriteLock writeLock; |
| |
| public PlacementManager() { |
| ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
| readLock = lock.readLock(); |
| writeLock = lock.writeLock(); |
| } |
| |
| public void updateRules(List<PlacementRule> rules) { |
| try { |
| writeLock.lock(); |
| this.rules = rules; |
| } finally { |
| writeLock.unlock(); |
| } |
| } |
| |
| public void placeApplication(ApplicationSubmissionContext asc, String user) |
| throws YarnException { |
| try { |
| readLock.lock(); |
| if (null == rules || rules.isEmpty()) { |
| return; |
| } |
| |
| String newQueueName = null; |
| for (PlacementRule rule : rules) { |
| newQueueName = rule.getQueueForApp(asc, user); |
| if (newQueueName != null) { |
| break; |
| } |
| } |
| |
| // Failed to get where to place application |
| if (null == newQueueName && null == asc.getQueue()) { |
| String msg = "Failed to get where to place application=" |
| + asc.getApplicationId(); |
| LOG.error(msg); |
| throw new YarnException(msg); |
| } |
| |
| // Set it to ApplicationSubmissionContext |
| if (!StringUtils.equals(asc.getQueue(), newQueueName)) { |
| LOG.info("Placed application=" + asc.getApplicationId() + " to queue=" |
| + newQueueName + ", original queue=" + asc.getQueue()); |
| asc.setQueue(newQueueName); |
| } |
| } finally { |
| readLock.unlock(); |
| } |
| } |
| |
| @VisibleForTesting |
| public List<PlacementRule> getPlacementRules() { |
| return rules; |
| } |
| } |