| /** |
| * 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.hdfs.server.datanode; |
| |
| import java.io.File; |
| |
| import org.apache.hadoop.hdfs.protocol.Block; |
| import org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState; |
| import org.apache.hadoop.hdfs.server.datanode.FSDataset.FSVolume; |
| |
| /** |
| * This class represents a replica that is waiting to be recovered. |
| * After a datanode restart, any replica in "rbw" directory is loaded |
| * as a replica waiting to be recovered. |
| * A replica waiting to be recovered does not provision read nor |
| * participates in any pipeline recovery. It will become outdated if its |
| * client continues to write or be recovered as a result of |
| * lease recovery. |
| */ |
| class ReplicaWaitingToBeRecovered extends ReplicaInfo { |
| private boolean unlinked; // copy-on-write done for block |
| |
| /** |
| * Constructor |
| * @param blockId block id |
| * @param len replica length |
| * @param genStamp replica generation stamp |
| * @param vol volume where replica is located |
| * @param dir directory path where block and meta files are located |
| */ |
| ReplicaWaitingToBeRecovered(long blockId, long len, long genStamp, |
| FSVolume vol, File dir) { |
| super(blockId, len, genStamp, vol, dir); |
| } |
| |
| /** |
| * Constructor |
| * @param block a block |
| * @param vol volume where replica is located |
| * @param dir directory path where block and meta files are located |
| */ |
| ReplicaWaitingToBeRecovered(Block block, FSVolume vol, File dir) { |
| super(block, vol, dir); |
| } |
| |
| /** |
| * Copy constructor. |
| * @param from |
| */ |
| ReplicaWaitingToBeRecovered(ReplicaWaitingToBeRecovered from) { |
| super(from); |
| this.unlinked = from.isUnlinked(); |
| } |
| |
| @Override //ReplicaInfo |
| public ReplicaState getState() { |
| return ReplicaState.RWR; |
| } |
| |
| @Override //ReplicaInfo |
| boolean isUnlinked() { |
| return unlinked; |
| } |
| |
| @Override //ReplicaInfo |
| void setUnlinked() { |
| unlinked = true; |
| } |
| |
| @Override //ReplicaInfo |
| public long getVisibleLength() { |
| return -1; //no bytes are visible |
| } |
| |
| @Override |
| public long getBytesOnDisk() { |
| return getNumBytes(); |
| } |
| |
| @Override // Object |
| public boolean equals(Object o) { |
| return super.equals(o); |
| } |
| |
| @Override // Object |
| public int hashCode() { |
| return super.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() |
| + "\n unlinked=" + unlinked; |
| } |
| } |