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.hdfs.server.blockmanagement;
019
020/**
021 * A immutable object that stores the number of live replicas and
022 * the number of decommissined Replicas.
023 */
024public class NumberReplicas {
025  private int liveReplicas;
026  private int decommissionedReplicas;
027  private int corruptReplicas;
028  private int excessReplicas;
029  private int replicasOnStaleNodes;
030
031  NumberReplicas() {
032    initialize(0, 0, 0, 0, 0);
033  }
034
035  NumberReplicas(int live, int decommissioned, int corrupt, int excess, int stale) {
036    initialize(live, decommissioned, corrupt, excess, stale);
037  }
038
039  void initialize(int live, int decommissioned, int corrupt, int excess, int stale) {
040    liveReplicas = live;
041    decommissionedReplicas = decommissioned;
042    corruptReplicas = corrupt;
043    excessReplicas = excess;
044    replicasOnStaleNodes = stale;
045  }
046
047  public int liveReplicas() {
048    return liveReplicas;
049  }
050  public int decommissionedReplicas() {
051    return decommissionedReplicas;
052  }
053  public int corruptReplicas() {
054    return corruptReplicas;
055  }
056  public int excessReplicas() {
057    return excessReplicas;
058  }
059  
060  /**
061   * @return the number of replicas which are on stale nodes.
062   * This is not mutually exclusive with the other counts -- ie a
063   * replica may count as both "live" and "stale".
064   */
065  public int replicasOnStaleNodes() {
066    return replicasOnStaleNodes;
067  }
068}