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 */
018
019package org.apache.hadoop.conf;
020
021import com.google.common.base.Optional;
022import org.apache.hadoop.classification.InterfaceAudience;
023import org.apache.hadoop.classification.InterfaceStability;
024import org.apache.hadoop.conf.ReconfigurationUtil.PropertyChange;
025
026import java.util.Map;
027
028@InterfaceAudience.Public
029@InterfaceStability.Stable
030public class ReconfigurationTaskStatus {
031  long startTime;
032  long endTime;
033  final Map<ReconfigurationUtil.PropertyChange, Optional<String>> status;
034
035  public ReconfigurationTaskStatus(long startTime, long endTime,
036      Map<ReconfigurationUtil.PropertyChange, Optional<String>> status) {
037    this.startTime = startTime;
038    this.endTime = endTime;
039    this.status = status;
040  }
041
042  /**
043   * Return true if
044   *   - A reconfiguration task has finished or
045   *   - an active reconfiguration task is running
046   */
047  public boolean hasTask() {
048    return startTime > 0;
049  }
050
051  /**
052   * Return true if the latest reconfiguration task has finished and there is
053   * no another active task running.
054   */
055  public boolean stopped() {
056    return endTime > 0;
057  }
058
059  public long getStartTime() {
060    return startTime;
061  }
062
063  public long getEndTime() {
064    return endTime;
065  }
066
067  public final Map<PropertyChange, Optional<String>> getStatus() {
068    return status;
069  }
070}