| /** |
| * 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.mapred; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.authorize.AccessControlList; |
| import org.apache.hadoop.util.StringUtils; |
| |
| /** |
| * A class for storing the properties of a job queue. |
| */ |
| class Queue { |
| |
| private static final Log LOG = LogFactory.getLog(Queue.class); |
| |
| private String name; |
| private Map<String,AccessControlList> acls; |
| private QueueState state = QueueState.RUNNING; |
| private QueueMetrics queueMetrics; |
| |
| /** |
| * An Object that can be used by schedulers to fill in |
| * arbitrary scheduling information. The toString method |
| * of these objects will be called by the framework to |
| * get a String that can be displayed on UI. |
| */ |
| private Object schedulingInfo; |
| |
| /** |
| * Enum representing queue state |
| */ |
| static enum QueueState { |
| STOPPED("stopped"), RUNNING("running"); |
| |
| private final String stateName; |
| |
| QueueState(String stateName) { |
| this.stateName = stateName; |
| } |
| |
| public String getStateName() { |
| return stateName; |
| } |
| } |
| |
| /** |
| * Create a job queue |
| * @param name name of the queue |
| * @param acls ACLs for the queue |
| * @param state state of the queue |
| */ |
| Queue(String name, Map<String, AccessControlList> acls, QueueState state, |
| QueueMetrics metrics) { |
| this.name = name; |
| this.acls = acls; |
| this.state = state; |
| this.queueMetrics = metrics; |
| } |
| |
| /** |
| * Return the name of the queue |
| * |
| * @return name of the queue |
| */ |
| String getName() { |
| return name; |
| } |
| |
| /** |
| * Set the name of the queue |
| * @param name name of the queue |
| */ |
| void setName(String name) { |
| assert name != null; |
| this.name = name; |
| } |
| |
| /** |
| * Return the ACLs for the queue |
| * |
| * The keys in the map indicate the operations that can be performed, |
| * and the values indicate the list of users/groups who can perform |
| * the operation. |
| * |
| * @return Map containing the operations that can be performed and |
| * who can perform the operations. |
| */ |
| Map<String, AccessControlList> getAcls() { |
| return acls; |
| } |
| |
| /** |
| * Set the ACLs for the queue |
| * @param acls Map containing the operations that can be performed and |
| * who can perform the operations. |
| */ |
| void setAcls(Map<String, AccessControlList> acls) { |
| assert acls != null; |
| this.acls = acls; |
| } |
| |
| /** |
| * Return the state of the queue. |
| * @return state of the queue |
| */ |
| QueueState getState() { |
| return state; |
| } |
| |
| /** |
| * Set the state of the queue. |
| * @param state state of the queue. |
| */ |
| void setState(QueueState state) { |
| assert state != null; |
| this.state = state; |
| } |
| |
| /** |
| * Return the scheduling information for the queue |
| * @return scheduling information for the queue. |
| */ |
| Object getSchedulingInfo() { |
| return schedulingInfo; |
| } |
| |
| /** |
| * Set the scheduling information from the queue. |
| * @param schedulingInfo scheduling information for the queue. |
| */ |
| void setSchedulingInfo(Object schedulingInfo) { |
| this.schedulingInfo = schedulingInfo; |
| } |
| |
| /** |
| * Return the QueueMetrics object for this queue |
| * @return QueueMetrics |
| */ |
| public QueueMetrics getMetrics() { |
| return this.queueMetrics; |
| } |
| } |