[120] | 1 | /** |
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| 2 | * |
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| 3 | * Licensed under the Apache License, Version 2.0 |
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| 4 | * (the "License"); you may not use this file except in compliance with |
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| 5 | * the License. You may obtain a copy of the License at |
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| 6 | * |
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| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 8 | * |
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| 9 | * Unless required by applicable law or agreed to in writing, software |
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| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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| 12 | * implied. See the License for the specific language governing |
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| 13 | * permissions and limitations under the License. |
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| 14 | * |
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| 15 | * @author: Sriram Rao (Kosmix Corp.) |
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| 16 | * |
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| 17 | * Provide the implementation of KFS which turn into calls to KfsAccess. |
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| 18 | */ |
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| 19 | |
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| 20 | package org.apache.hadoop.fs.kfs; |
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| 21 | |
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| 22 | import java.io.*; |
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| 23 | |
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| 24 | import org.apache.hadoop.fs.FSDataInputStream; |
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| 25 | import org.apache.hadoop.fs.FSDataOutputStream; |
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| 26 | import org.apache.hadoop.fs.FileSystem; |
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| 27 | import org.apache.hadoop.fs.FileStatus; |
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| 28 | import org.apache.hadoop.fs.Path; |
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| 29 | |
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| 30 | import org.kosmix.kosmosfs.access.KfsAccess; |
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| 31 | import org.kosmix.kosmosfs.access.KfsFileAttr; |
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| 32 | |
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| 33 | class KFSImpl implements IFSImpl { |
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| 34 | private KfsAccess kfsAccess = null; |
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| 35 | private FileSystem.Statistics statistics; |
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| 36 | |
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| 37 | @Deprecated |
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| 38 | public KFSImpl(String metaServerHost, int metaServerPort |
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| 39 | ) throws IOException { |
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| 40 | this(metaServerHost, metaServerPort, null); |
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| 41 | } |
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| 42 | |
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| 43 | public KFSImpl(String metaServerHost, int metaServerPort, |
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| 44 | FileSystem.Statistics stats) throws IOException { |
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| 45 | kfsAccess = new KfsAccess(metaServerHost, metaServerPort); |
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| 46 | statistics = stats; |
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| 47 | } |
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| 48 | |
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| 49 | public boolean exists(String path) throws IOException { |
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| 50 | return kfsAccess.kfs_exists(path); |
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| 51 | } |
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| 52 | |
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| 53 | public boolean isDirectory(String path) throws IOException { |
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| 54 | return kfsAccess.kfs_isDirectory(path); |
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| 55 | } |
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| 56 | |
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| 57 | public boolean isFile(String path) throws IOException { |
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| 58 | return kfsAccess.kfs_isFile(path); |
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| 59 | } |
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| 60 | |
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| 61 | public String[] readdir(String path) throws IOException { |
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| 62 | return kfsAccess.kfs_readdir(path); |
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| 63 | } |
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| 64 | |
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| 65 | public FileStatus[] readdirplus(Path path) throws IOException { |
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| 66 | String srep = path.toUri().getPath(); |
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| 67 | KfsFileAttr[] fattr = kfsAccess.kfs_readdirplus(srep); |
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| 68 | if (fattr == null) |
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| 69 | return null; |
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| 70 | int numEntries = 0; |
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| 71 | for (int i = 0; i < fattr.length; i++) { |
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| 72 | if ((fattr[i].filename.compareTo(".") == 0) || (fattr[i].filename.compareTo("..") == 0)) |
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| 73 | continue; |
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| 74 | numEntries++; |
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| 75 | } |
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| 76 | FileStatus[] fstatus = new FileStatus[numEntries]; |
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| 77 | int j = 0; |
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| 78 | for (int i = 0; i < fattr.length; i++) { |
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| 79 | if ((fattr[i].filename.compareTo(".") == 0) || (fattr[i].filename.compareTo("..") == 0)) |
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| 80 | continue; |
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| 81 | Path fn = new Path(path, fattr[i].filename); |
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| 82 | |
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| 83 | if (fattr[i].isDirectory) |
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| 84 | fstatus[j] = new FileStatus(0, true, 1, 0, fattr[i].modificationTime, fn); |
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| 85 | else |
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| 86 | fstatus[j] = new FileStatus(fattr[i].filesize, fattr[i].isDirectory, |
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| 87 | fattr[i].replication, |
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| 88 | (long) |
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| 89 | (1 << 26), |
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| 90 | fattr[i].modificationTime, |
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| 91 | fn); |
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| 92 | |
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| 93 | j++; |
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| 94 | } |
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| 95 | return fstatus; |
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| 96 | } |
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| 97 | |
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| 98 | |
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| 99 | public int mkdirs(String path) throws IOException { |
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| 100 | return kfsAccess.kfs_mkdirs(path); |
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| 101 | } |
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| 102 | |
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| 103 | public int rename(String source, String dest) throws IOException { |
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| 104 | return kfsAccess.kfs_rename(source, dest); |
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| 105 | } |
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| 106 | |
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| 107 | public int rmdir(String path) throws IOException { |
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| 108 | return kfsAccess.kfs_rmdir(path); |
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| 109 | } |
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| 110 | |
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| 111 | public int remove(String path) throws IOException { |
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| 112 | return kfsAccess.kfs_remove(path); |
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| 113 | } |
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| 114 | |
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| 115 | public long filesize(String path) throws IOException { |
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| 116 | return kfsAccess.kfs_filesize(path); |
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| 117 | } |
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| 118 | |
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| 119 | public short getReplication(String path) throws IOException { |
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| 120 | return kfsAccess.kfs_getReplication(path); |
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| 121 | } |
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| 122 | |
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| 123 | public short setReplication(String path, short replication) throws IOException { |
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| 124 | return kfsAccess.kfs_setReplication(path, replication); |
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| 125 | } |
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| 126 | |
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| 127 | public String[][] getDataLocation(String path, long start, long len) throws IOException { |
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| 128 | return kfsAccess.kfs_getDataLocation(path, start, len); |
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| 129 | } |
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| 130 | |
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| 131 | public long getModificationTime(String path) throws IOException { |
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| 132 | return kfsAccess.kfs_getModificationTime(path); |
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| 133 | } |
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| 134 | |
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| 135 | public FSDataOutputStream create(String path, short replication, int bufferSize) throws IOException { |
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| 136 | return new FSDataOutputStream(new KFSOutputStream(kfsAccess, path, replication), |
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| 137 | statistics); |
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| 138 | } |
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| 139 | |
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| 140 | public FSDataInputStream open(String path, int bufferSize) throws IOException { |
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| 141 | return new FSDataInputStream(new KFSInputStream(kfsAccess, path, |
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| 142 | statistics)); |
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| 143 | } |
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| 144 | } |
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