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}