| /** |
| * 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; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.yarn.api.records.ApplicationId; |
| import org.apache.hadoop.yarn.api.records.ContainerId; |
| import org.apache.hadoop.yarn.api.records.Priority; |
| import org.apache.hadoop.yarn.api.records.ResourceRequest; |
| import org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType; |
| |
| public class Task { |
| private static final Log LOG = LogFactory.getLog(Task.class); |
| |
| public enum State {PENDING, ALLOCATED, RUNNING, COMPLETE}; |
| |
| final private ApplicationId applicationId; |
| final private int taskId; |
| final private Priority priority; |
| |
| final private Set<String> hosts = new HashSet<String>(); |
| final private Set<String> racks = new HashSet<String>(); |
| |
| private ContainerId containerId; |
| private org.apache.hadoop.yarn.server.resourcemanager.NodeManager nodeManager; |
| |
| private State state; |
| |
| public Task(Application application, Priority priority, String[] hosts) { |
| this.applicationId = application.getApplicationId(); |
| this.priority = priority; |
| |
| taskId = application.getNextTaskId(); |
| state = State.PENDING; |
| |
| // Special case: Don't care about locality |
| if (!(hosts.length == 1 && |
| hosts[0].equals(ResourceRequest.ANY))) { |
| for (String host : hosts) { |
| this.hosts.add(host); |
| this.racks.add(Application.resolve(host)); |
| } |
| } |
| LOG.info("Task " + taskId + " added to application " + this.applicationId + |
| " with " + this.hosts.size() + " hosts, " + racks.size() + " racks"); |
| } |
| |
| public int getTaskId() { |
| return taskId; |
| } |
| |
| public Priority getPriority() { |
| return priority; |
| } |
| |
| public org.apache.hadoop.yarn.server.resourcemanager.NodeManager getNodeManager() { |
| return nodeManager; |
| } |
| |
| public ContainerId getContainerId() { |
| return containerId; |
| } |
| |
| public ApplicationId getApplicationID() { |
| return applicationId; |
| } |
| |
| public String[] getHosts() { |
| return hosts.toArray(new String[hosts.size()]); |
| } |
| |
| public String[] getRacks() { |
| return racks.toArray(new String[racks.size()]); |
| } |
| |
| public boolean canSchedule(NodeType type, String hostName) { |
| if (type == NodeType.NODE_LOCAL) { |
| return hosts.contains(hostName); |
| } else if (type == NodeType.RACK_LOCAL) { |
| return racks.contains(Application.resolve(hostName)); |
| } |
| |
| return true; |
| } |
| |
| public void start(NodeManager nodeManager, ContainerId containerId) { |
| this.nodeManager = nodeManager; |
| this.containerId = containerId; |
| setState(State.RUNNING); |
| } |
| |
| public void stop() { |
| if (getState() != State.RUNNING) { |
| throw new IllegalStateException("Trying to stop a non-running task: " + |
| getTaskId() + " of application " + getApplicationID()); |
| } |
| this.nodeManager = null; |
| this.containerId = null; |
| setState(State.COMPLETE); |
| } |
| |
| public State getState() { |
| return state; |
| } |
| |
| private void setState(State state) { |
| this.state = state; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof Task) { |
| return ((Task)obj).taskId == this.taskId; |
| } |
| return super.equals(obj); |
| } |
| |
| @Override |
| public int hashCode() { |
| return taskId; |
| } |
| } |