[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.fs.s3native; |
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| 20 | |
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| 21 | import static org.apache.hadoop.fs.s3native.NativeS3FileSystem.PATH_DELIMITER; |
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| 22 | import java.io.BufferedInputStream; |
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| 23 | import java.io.BufferedOutputStream; |
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| 24 | import java.io.ByteArrayOutputStream; |
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| 25 | import java.io.File; |
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| 26 | import java.io.FileInputStream; |
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| 27 | import java.io.FileOutputStream; |
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| 28 | import java.io.IOException; |
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| 29 | import java.io.InputStream; |
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| 30 | import java.net.URI; |
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| 31 | import java.util.ArrayList; |
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| 32 | import java.util.Iterator; |
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| 33 | import java.util.List; |
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| 34 | import java.util.SortedMap; |
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| 35 | import java.util.SortedSet; |
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| 36 | import java.util.TreeMap; |
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| 37 | import java.util.TreeSet; |
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| 38 | import java.util.Map.Entry; |
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| 39 | |
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| 40 | import org.apache.hadoop.conf.Configuration; |
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| 41 | |
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| 42 | /** |
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| 43 | * <p> |
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| 44 | * A stub implementation of {@link NativeFileSystemStore} for testing |
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| 45 | * {@link NativeS3FileSystem} without actually connecting to S3. |
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| 46 | * </p> |
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| 47 | */ |
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| 48 | class InMemoryNativeFileSystemStore implements NativeFileSystemStore { |
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| 49 | |
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| 50 | private Configuration conf; |
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| 51 | |
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| 52 | private SortedMap<String, FileMetadata> metadataMap = |
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| 53 | new TreeMap<String, FileMetadata>(); |
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| 54 | private SortedMap<String, byte[]> dataMap = new TreeMap<String, byte[]>(); |
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| 55 | |
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| 56 | public void initialize(URI uri, Configuration conf) throws IOException { |
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| 57 | this.conf = conf; |
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| 58 | } |
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| 59 | |
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| 60 | public void storeEmptyFile(String key) throws IOException { |
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| 61 | metadataMap.put(key, new FileMetadata(key, 0, System.currentTimeMillis())); |
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| 62 | dataMap.put(key, new byte[0]); |
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| 63 | } |
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| 64 | |
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| 65 | public void storeFile(String key, File file, byte[] md5Hash) |
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| 66 | throws IOException { |
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| 67 | |
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| 68 | ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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| 69 | byte[] buf = new byte[8192]; |
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| 70 | int numRead; |
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| 71 | BufferedInputStream in = null; |
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| 72 | try { |
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| 73 | in = new BufferedInputStream(new FileInputStream(file)); |
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| 74 | while ((numRead = in.read(buf)) >= 0) { |
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| 75 | out.write(buf, 0, numRead); |
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| 76 | } |
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| 77 | } finally { |
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| 78 | if (in != null) { |
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| 79 | in.close(); |
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| 80 | } |
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| 81 | } |
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| 82 | metadataMap.put(key, |
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| 83 | new FileMetadata(key, file.length(), System.currentTimeMillis())); |
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| 84 | dataMap.put(key, out.toByteArray()); |
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| 85 | } |
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| 86 | |
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| 87 | public InputStream retrieve(String key) throws IOException { |
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| 88 | return retrieve(key, 0); |
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| 89 | } |
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| 90 | |
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| 91 | public InputStream retrieve(String key, long byteRangeStart) |
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| 92 | throws IOException { |
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| 93 | |
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| 94 | byte[] data = dataMap.get(key); |
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| 95 | File file = createTempFile(); |
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| 96 | BufferedOutputStream out = null; |
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| 97 | try { |
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| 98 | out = new BufferedOutputStream(new FileOutputStream(file)); |
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| 99 | out.write(data, (int) byteRangeStart, |
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| 100 | data.length - (int) byteRangeStart); |
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| 101 | } finally { |
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| 102 | if (out != null) { |
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| 103 | out.close(); |
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| 104 | } |
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| 105 | } |
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| 106 | return new FileInputStream(file); |
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| 107 | } |
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| 108 | |
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| 109 | private File createTempFile() throws IOException { |
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| 110 | File dir = new File(conf.get("fs.s3.buffer.dir")); |
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| 111 | if (!dir.exists() && !dir.mkdirs()) { |
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| 112 | throw new IOException("Cannot create S3 buffer directory: " + dir); |
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| 113 | } |
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| 114 | File result = File.createTempFile("test-", ".tmp", dir); |
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| 115 | result.deleteOnExit(); |
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| 116 | return result; |
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| 117 | } |
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| 118 | |
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| 119 | public FileMetadata retrieveMetadata(String key) throws IOException { |
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| 120 | return metadataMap.get(key); |
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| 121 | } |
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| 122 | |
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| 123 | public PartialListing list(String prefix, int maxListingLength) |
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| 124 | throws IOException { |
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| 125 | return list(prefix, maxListingLength, null); |
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| 126 | } |
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| 127 | |
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| 128 | public PartialListing list(String prefix, int maxListingLength, |
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| 129 | String priorLastKey) throws IOException { |
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| 130 | |
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| 131 | return list(prefix, PATH_DELIMITER, maxListingLength, priorLastKey); |
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| 132 | } |
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| 133 | |
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| 134 | public PartialListing listAll(String prefix, int maxListingLength, |
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| 135 | String priorLastKey) throws IOException { |
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| 136 | |
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| 137 | return list(prefix, null, maxListingLength, priorLastKey); |
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| 138 | } |
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| 139 | |
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| 140 | private PartialListing list(String prefix, String delimiter, |
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| 141 | int maxListingLength, String priorLastKey) throws IOException { |
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| 142 | |
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| 143 | if (prefix.length() > 0 && !prefix.endsWith(PATH_DELIMITER)) { |
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| 144 | prefix += PATH_DELIMITER; |
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| 145 | } |
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| 146 | |
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| 147 | List<FileMetadata> metadata = new ArrayList<FileMetadata>(); |
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| 148 | SortedSet<String> commonPrefixes = new TreeSet<String>(); |
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| 149 | for (String key : dataMap.keySet()) { |
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| 150 | if (key.startsWith(prefix)) { |
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| 151 | if (delimiter == null) { |
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| 152 | metadata.add(retrieveMetadata(key)); |
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| 153 | } else { |
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| 154 | int delimIndex = key.indexOf(delimiter, prefix.length()); |
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| 155 | if (delimIndex == -1) { |
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| 156 | metadata.add(retrieveMetadata(key)); |
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| 157 | } else { |
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| 158 | String commonPrefix = key.substring(0, delimIndex); |
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| 159 | commonPrefixes.add(commonPrefix); |
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| 160 | } |
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| 161 | } |
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| 162 | } |
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| 163 | if (metadata.size() + commonPrefixes.size() == maxListingLength) { |
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| 164 | new PartialListing(key, metadata.toArray(new FileMetadata[0]), |
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| 165 | commonPrefixes.toArray(new String[0])); |
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| 166 | } |
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| 167 | } |
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| 168 | return new PartialListing(null, metadata.toArray(new FileMetadata[0]), |
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| 169 | commonPrefixes.toArray(new String[0])); |
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| 170 | } |
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| 171 | |
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| 172 | public void delete(String key) throws IOException { |
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| 173 | metadataMap.remove(key); |
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| 174 | dataMap.remove(key); |
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| 175 | } |
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| 176 | |
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| 177 | public void rename(String srcKey, String dstKey) throws IOException { |
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| 178 | metadataMap.put(dstKey, metadataMap.remove(srcKey)); |
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| 179 | dataMap.put(dstKey, dataMap.remove(srcKey)); |
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| 180 | } |
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| 181 | |
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| 182 | public void purge(String prefix) throws IOException { |
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| 183 | Iterator<Entry<String, FileMetadata>> i = |
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| 184 | metadataMap.entrySet().iterator(); |
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| 185 | while (i.hasNext()) { |
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| 186 | Entry<String, FileMetadata> entry = i.next(); |
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| 187 | if (entry.getKey().startsWith(prefix)) { |
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| 188 | dataMap.remove(entry.getKey()); |
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| 189 | i.remove(); |
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| 190 | } |
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| 191 | } |
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| 192 | } |
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| 193 | |
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| 194 | public void dump() throws IOException { |
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| 195 | System.out.println(metadataMap.values()); |
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| 196 | System.out.println(dataMap.keySet()); |
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| 197 | } |
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| 198 | } |
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