[120] | 1 | /** |
---|
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
---|
| 3 | * or more contributor license agreements. See the NOTICE file |
---|
| 4 | * distributed with this work for additional information |
---|
| 5 | * regarding copyright ownership. The ASF licenses this file |
---|
| 6 | * to you under the Apache License, Version 2.0 (the |
---|
| 7 | * "License"); you may not use this file except in compliance |
---|
| 8 | * with the License. You may obtain a copy of the License at |
---|
| 9 | * |
---|
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
---|
| 11 | * |
---|
| 12 | * Unless required by applicable law or agreed to in writing, software |
---|
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
---|
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
| 15 | * See the License for the specific language governing permissions and |
---|
| 16 | * limitations under the License. |
---|
| 17 | */ |
---|
| 18 | |
---|
| 19 | package org.apache.hadoop.fs; |
---|
| 20 | |
---|
| 21 | import java.io.*; |
---|
| 22 | import java.net.URI; |
---|
| 23 | import java.util.*; |
---|
| 24 | |
---|
| 25 | /**************************************************************** |
---|
| 26 | * Implement the FileSystem API for the checksumed local filesystem. |
---|
| 27 | * |
---|
| 28 | *****************************************************************/ |
---|
| 29 | public class LocalFileSystem extends ChecksumFileSystem { |
---|
| 30 | static final URI NAME = URI.create("file:///"); |
---|
| 31 | static private Random rand = new Random(); |
---|
| 32 | FileSystem rfs; |
---|
| 33 | |
---|
| 34 | public LocalFileSystem() { |
---|
| 35 | this(new RawLocalFileSystem()); |
---|
| 36 | } |
---|
| 37 | |
---|
| 38 | public FileSystem getRaw() { |
---|
| 39 | return rfs; |
---|
| 40 | } |
---|
| 41 | |
---|
| 42 | public LocalFileSystem(FileSystem rawLocalFileSystem) { |
---|
| 43 | super(rawLocalFileSystem); |
---|
| 44 | rfs = rawLocalFileSystem; |
---|
| 45 | } |
---|
| 46 | |
---|
| 47 | /** Convert a path to a File. */ |
---|
| 48 | public File pathToFile(Path path) { |
---|
| 49 | return ((RawLocalFileSystem)fs).pathToFile(path); |
---|
| 50 | } |
---|
| 51 | |
---|
| 52 | @Override |
---|
| 53 | public void copyFromLocalFile(boolean delSrc, Path src, Path dst) |
---|
| 54 | throws IOException { |
---|
| 55 | FileUtil.copy(this, src, this, dst, delSrc, getConf()); |
---|
| 56 | } |
---|
| 57 | |
---|
| 58 | @Override |
---|
| 59 | public void copyToLocalFile(boolean delSrc, Path src, Path dst) |
---|
| 60 | throws IOException { |
---|
| 61 | FileUtil.copy(this, src, this, dst, delSrc, getConf()); |
---|
| 62 | } |
---|
| 63 | |
---|
| 64 | /** |
---|
| 65 | * Moves files to a bad file directory on the same device, so that their |
---|
| 66 | * storage will not be reused. |
---|
| 67 | */ |
---|
| 68 | public boolean reportChecksumFailure(Path p, FSDataInputStream in, |
---|
| 69 | long inPos, |
---|
| 70 | FSDataInputStream sums, long sumsPos) { |
---|
| 71 | try { |
---|
| 72 | // canonicalize f |
---|
| 73 | File f = ((RawLocalFileSystem)fs).pathToFile(p).getCanonicalFile(); |
---|
| 74 | |
---|
| 75 | // find highest writable parent dir of f on the same device |
---|
| 76 | String device = new DF(f, getConf()).getMount(); |
---|
| 77 | File parent = f.getParentFile(); |
---|
| 78 | File dir = null; |
---|
| 79 | while (parent!=null && parent.canWrite() && parent.toString().startsWith(device)) { |
---|
| 80 | dir = parent; |
---|
| 81 | parent = parent.getParentFile(); |
---|
| 82 | } |
---|
| 83 | |
---|
| 84 | if (dir==null) { |
---|
| 85 | throw new IOException( |
---|
| 86 | "not able to find the highest writable parent dir"); |
---|
| 87 | } |
---|
| 88 | |
---|
| 89 | // move the file there |
---|
| 90 | File badDir = new File(dir, "bad_files"); |
---|
| 91 | if (!badDir.mkdirs()) { |
---|
| 92 | if (!badDir.isDirectory()) { |
---|
| 93 | throw new IOException("Mkdirs failed to create " + badDir.toString()); |
---|
| 94 | } |
---|
| 95 | } |
---|
| 96 | String suffix = "." + rand.nextInt(); |
---|
| 97 | File badFile = new File(badDir, f.getName()+suffix); |
---|
| 98 | LOG.warn("Moving bad file " + f + " to " + badFile); |
---|
| 99 | in.close(); // close it first |
---|
| 100 | f.renameTo(badFile); // rename it |
---|
| 101 | |
---|
| 102 | // move checksum file too |
---|
| 103 | File checkFile = ((RawLocalFileSystem)fs).pathToFile(getChecksumFile(p)); |
---|
| 104 | checkFile.renameTo(new File(badDir, checkFile.getName()+suffix)); |
---|
| 105 | |
---|
| 106 | } catch (IOException e) { |
---|
| 107 | LOG.warn("Error moving bad file " + p + ": " + e); |
---|
| 108 | } |
---|
| 109 | return false; |
---|
| 110 | } |
---|
| 111 | } |
---|