| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.preemption; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.apache.hadoop.yarn.api.records.ContainerId; |
| import org.apache.hadoop.yarn.api.records.Resource; |
| import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer; |
| import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CSQueue; |
| import org.apache.hadoop.yarn.util.resource.Resources; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| public class PreemptionManager { |
| private ReentrantReadWriteLock.ReadLock readLock; |
| private ReentrantReadWriteLock.WriteLock writeLock; |
| private Map<String, PreemptableQueue> entities = new HashMap<>(); |
| |
| public PreemptionManager() { |
| ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
| readLock = lock.readLock(); |
| writeLock = lock.writeLock(); |
| } |
| |
| public void refreshQueues(CSQueue parent, CSQueue current) { |
| try { |
| writeLock.lock(); |
| PreemptableQueue parentEntity = null; |
| if (parent != null) { |
| parentEntity = entities.get(parent.getQueueName()); |
| } |
| |
| if (!entities.containsKey(current.getQueueName())) { |
| entities.put(current.getQueueName(), |
| new PreemptableQueue(parentEntity)); |
| } |
| |
| if (current.getChildQueues() != null) { |
| for (CSQueue child : current.getChildQueues()) { |
| refreshQueues(current, child); |
| } |
| } |
| } |
| finally { |
| writeLock.unlock(); |
| } |
| } |
| |
| public void addKillableContainer(KillableContainer container) { |
| try { |
| writeLock.lock(); |
| PreemptableQueue entity = entities.get(container.getLeafQueueName()); |
| if (null != entity) { |
| entity.addKillableContainer(container); |
| } |
| } |
| finally { |
| writeLock.unlock(); |
| } |
| } |
| |
| public void removeKillableContainer(KillableContainer container) { |
| try { |
| writeLock.lock(); |
| PreemptableQueue entity = entities.get(container.getLeafQueueName()); |
| if (null != entity) { |
| entity.removeKillableContainer(container); |
| } |
| } |
| finally { |
| writeLock.unlock(); |
| } |
| } |
| |
| public void moveKillableContainer(KillableContainer oldContainer, |
| KillableContainer newContainer) { |
| // TODO, will be called when partition of the node changed OR |
| // container moved to different queue |
| } |
| |
| public void updateKillableContainerResource(KillableContainer container, |
| Resource oldResource, Resource newResource) { |
| // TODO, will be called when container's resource changed |
| } |
| |
| @VisibleForTesting |
| public Map<ContainerId, RMContainer> getKillableContainersMap( |
| String queueName, String partition) { |
| try { |
| readLock.lock(); |
| PreemptableQueue entity = entities.get(queueName); |
| if (entity != null) { |
| Map<ContainerId, RMContainer> containers = |
| entity.getKillableContainers().get(partition); |
| if (containers != null) { |
| return containers; |
| } |
| } |
| return Collections.emptyMap(); |
| } |
| finally { |
| readLock.unlock(); |
| } |
| } |
| |
| public Iterator<RMContainer> getKillableContainers(String queueName, |
| String partition) { |
| return getKillableContainersMap(queueName, partition).values().iterator(); |
| } |
| |
| public Resource getKillableResource(String queueName, String partition) { |
| try { |
| readLock.lock(); |
| PreemptableQueue entity = entities.get(queueName); |
| if (entity != null) { |
| Resource res = entity.getTotalKillableResources().get(partition); |
| if (res == null || res.equals(Resources.none())) { |
| return Resources.none(); |
| } |
| return Resources.clone(res); |
| } |
| return Resources.none(); |
| } |
| finally { |
| readLock.unlock(); |
| } |
| } |
| |
| public Map<String, PreemptableQueue> getShallowCopyOfPreemptableQueues() { |
| try { |
| readLock.lock(); |
| Map<String, PreemptableQueue> map = new HashMap<>(); |
| for (Map.Entry<String, PreemptableQueue> entry : entities.entrySet()) { |
| String key = entry.getKey(); |
| PreemptableQueue entity = entry.getValue(); |
| map.put(key, new PreemptableQueue( |
| new HashMap<>(entity.getTotalKillableResources()), |
| new HashMap<>(entity.getKillableContainers()))); |
| } |
| return map; |
| } finally { |
| readLock.unlock(); |
| } |
| } |
| } |