001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.mapreduce; 019 020import java.util.HashMap; 021import java.util.Map; 022 023import org.apache.hadoop.classification.InterfaceAudience; 024import org.apache.hadoop.classification.InterfaceStability; 025 026/** 027 * Enum representing queue state 028 */ 029@InterfaceAudience.Public 030@InterfaceStability.Evolving 031public enum QueueState { 032 033 STOPPED("stopped"), RUNNING("running"), UNDEFINED("undefined"); 034 private final String stateName; 035 private static Map<String, QueueState> enumMap = 036 new HashMap<String, QueueState>(); 037 038 static { 039 for (QueueState state : QueueState.values()) { 040 enumMap.put(state.getStateName(), state); 041 } 042 } 043 044 QueueState(String stateName) { 045 this.stateName = stateName; 046 } 047 048 /** 049 * @return the stateName 050 */ 051 public String getStateName() { 052 return stateName; 053 } 054 055 public static QueueState getState(String state) { 056 QueueState qState = enumMap.get(state); 057 if (qState == null) { 058 return UNDEFINED; 059 } 060 return qState; 061 } 062 063 @Override 064 public String toString() { 065 return stateName; 066 } 067 068}