| /** |
| * 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.protocol; |
| |
| import org.apache.hadoop.thirdparty.com.google.common.base.Preconditions; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.StorageType; |
| import org.apache.hadoop.hdfs.protocol.Block; |
| |
| /** |
| * Maintains an array of blocks and their corresponding storage IDs. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class BlocksWithLocations { |
| |
| /** |
| * A class to keep track of a block and its locations |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public static class BlockWithLocations { |
| final Block block; |
| final String[] datanodeUuids; |
| final String[] storageIDs; |
| final StorageType[] storageTypes; |
| |
| /** constructor */ |
| public BlockWithLocations(Block block, String[] datanodeUuids, |
| String[] storageIDs, StorageType[] storageTypes) { |
| this.block = block; |
| this.datanodeUuids = datanodeUuids; |
| this.storageIDs = storageIDs; |
| this.storageTypes = storageTypes; |
| } |
| |
| /** get the block */ |
| public Block getBlock() { |
| return block; |
| } |
| |
| /** get the block's datanode locations */ |
| public String[] getDatanodeUuids() { |
| return datanodeUuids; |
| } |
| |
| /** get the block's storage locations */ |
| public String[] getStorageIDs() { |
| return storageIDs; |
| } |
| |
| /** @return the storage types */ |
| public StorageType[] getStorageTypes() { |
| return storageTypes; |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuilder b = new StringBuilder(); |
| b.append(block); |
| if (datanodeUuids.length == 0) { |
| return b.append("[]").toString(); |
| } |
| |
| appendString(0, b.append("[")); |
| for(int i = 1; i < datanodeUuids.length; i++) { |
| appendString(i, b.append(",")); |
| } |
| return b.append("]").toString(); |
| } |
| |
| private StringBuilder appendString(int i, StringBuilder b) { |
| return b.append("[").append(storageTypes[i]).append("]") |
| .append(storageIDs[i]) |
| .append("@").append(datanodeUuids[i]); |
| } |
| } |
| |
| public static class StripedBlockWithLocations extends BlockWithLocations { |
| final byte[] indices; |
| final short dataBlockNum; |
| final int cellSize; |
| |
| public StripedBlockWithLocations(BlockWithLocations blk, byte[] indices, |
| short dataBlockNum, int cellSize) { |
| super(blk.getBlock(), blk.getDatanodeUuids(), blk.getStorageIDs(), |
| blk.getStorageTypes()); |
| Preconditions.checkArgument( |
| blk.getDatanodeUuids().length == indices.length); |
| this.indices = indices; |
| this.dataBlockNum = dataBlockNum; |
| this.cellSize = cellSize; |
| } |
| |
| public byte[] getIndices() { |
| return indices; |
| } |
| |
| public short getDataBlockNum() { |
| return dataBlockNum; |
| } |
| |
| public int getCellSize() { |
| return cellSize; |
| } |
| } |
| |
| private final BlockWithLocations[] blocks; |
| |
| /** Constructor with one parameter */ |
| public BlocksWithLocations(BlockWithLocations[] blocks) { |
| this.blocks = blocks; |
| } |
| |
| /** getter */ |
| public BlockWithLocations[] getBlocks() { |
| return blocks; |
| } |
| } |