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 package org.apache.hadoop.fs;
019
020 import java.io.IOException;
021
022 import org.apache.hadoop.classification.InterfaceAudience;
023 import org.apache.hadoop.classification.InterfaceStability;
024
025 /**
026 * Wrapper for {@link BlockLocation} that also adds {@link VolumeId} volume
027 * location information for each replica.
028 */
029 @InterfaceStability.Unstable
030 @InterfaceAudience.Public
031 public class BlockStorageLocation extends BlockLocation {
032
033 private final VolumeId[] volumeIds;
034
035 public BlockStorageLocation(BlockLocation loc, VolumeId[] volumeIds)
036 throws IOException {
037 // Initialize with data from passed in BlockLocation
038 super(loc.getNames(), loc.getHosts(), loc.getTopologyPaths(), loc
039 .getOffset(), loc.getLength(), loc.isCorrupt());
040 this.volumeIds = volumeIds;
041 }
042
043 /**
044 * Gets the list of {@link VolumeId} corresponding to the block's replicas.
045 *
046 * @return volumeIds list of VolumeId for the block's replicas
047 */
048 public VolumeId[] getVolumeIds() {
049 return volumeIds;
050 }
051 }