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 | |
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23 | import java.io.BufferedInputStream; |
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24 | import java.io.ByteArrayInputStream; |
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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.IOException; |
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28 | import java.io.InputStream; |
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29 | import java.net.URI; |
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30 | |
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31 | import org.apache.hadoop.conf.Configuration; |
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32 | import org.apache.hadoop.fs.s3.S3Credentials; |
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33 | import org.apache.hadoop.fs.s3.S3Exception; |
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34 | import org.jets3t.service.S3ObjectsChunk; |
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35 | import org.jets3t.service.S3Service; |
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36 | import org.jets3t.service.S3ServiceException; |
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37 | import org.jets3t.service.impl.rest.httpclient.RestS3Service; |
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38 | import org.jets3t.service.model.S3Bucket; |
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39 | import org.jets3t.service.model.S3Object; |
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40 | import org.jets3t.service.security.AWSCredentials; |
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41 | |
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42 | class Jets3tNativeFileSystemStore implements NativeFileSystemStore { |
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43 | |
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44 | private S3Service s3Service; |
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45 | private S3Bucket bucket; |
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46 | |
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47 | public void initialize(URI uri, Configuration conf) throws IOException { |
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48 | S3Credentials s3Credentials = new S3Credentials(); |
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49 | s3Credentials.initialize(uri, conf); |
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50 | try { |
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51 | AWSCredentials awsCredentials = |
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52 | new AWSCredentials(s3Credentials.getAccessKey(), |
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53 | s3Credentials.getSecretAccessKey()); |
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54 | this.s3Service = new RestS3Service(awsCredentials); |
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55 | } catch (S3ServiceException e) { |
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56 | if (e.getCause() instanceof IOException) { |
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57 | throw (IOException) e.getCause(); |
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58 | } |
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59 | throw new S3Exception(e); |
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60 | } |
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61 | bucket = new S3Bucket(uri.getHost()); |
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62 | } |
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63 | |
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64 | public void storeFile(String key, File file, byte[] md5Hash) |
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65 | throws IOException { |
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66 | |
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67 | BufferedInputStream in = null; |
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68 | try { |
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69 | in = new BufferedInputStream(new FileInputStream(file)); |
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70 | S3Object object = new S3Object(key); |
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71 | object.setDataInputStream(in); |
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72 | object.setContentType("binary/octet-stream"); |
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73 | object.setContentLength(file.length()); |
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74 | if (md5Hash != null) { |
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75 | object.setMd5Hash(md5Hash); |
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76 | } |
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77 | s3Service.putObject(bucket, object); |
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78 | } catch (S3ServiceException e) { |
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79 | if (e.getCause() instanceof IOException) { |
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80 | throw (IOException) e.getCause(); |
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81 | } |
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82 | throw new S3Exception(e); |
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83 | } finally { |
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84 | if (in != null) { |
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85 | try { |
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86 | in.close(); |
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87 | } catch (IOException e) { |
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88 | // ignore |
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89 | } |
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90 | } |
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91 | } |
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92 | } |
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93 | |
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94 | public void storeEmptyFile(String key) throws IOException { |
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95 | try { |
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96 | S3Object object = new S3Object(key); |
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97 | object.setDataInputStream(new ByteArrayInputStream(new byte[0])); |
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98 | object.setContentType("binary/octet-stream"); |
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99 | object.setContentLength(0); |
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100 | s3Service.putObject(bucket, object); |
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101 | } catch (S3ServiceException e) { |
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102 | if (e.getCause() instanceof IOException) { |
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103 | throw (IOException) e.getCause(); |
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104 | } |
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105 | throw new S3Exception(e); |
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106 | } |
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107 | } |
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108 | |
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109 | public FileMetadata retrieveMetadata(String key) throws IOException { |
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110 | try { |
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111 | S3Object object = s3Service.getObjectDetails(bucket, key); |
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112 | return new FileMetadata(key, object.getContentLength(), |
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113 | object.getLastModifiedDate().getTime()); |
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114 | } catch (S3ServiceException e) { |
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115 | // Following is brittle. Is there a better way? |
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116 | if (e.getMessage().contains("ResponseCode=404")) { |
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117 | return null; |
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118 | } |
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119 | if (e.getCause() instanceof IOException) { |
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120 | throw (IOException) e.getCause(); |
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121 | } |
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122 | throw new S3Exception(e); |
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123 | } |
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124 | } |
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125 | |
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126 | public InputStream retrieve(String key) throws IOException { |
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127 | try { |
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128 | S3Object object = s3Service.getObject(bucket, key); |
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129 | return object.getDataInputStream(); |
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130 | } catch (S3ServiceException e) { |
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131 | if ("NoSuchKey".equals(e.getS3ErrorCode())) { |
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132 | return null; |
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133 | } |
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134 | if (e.getCause() instanceof IOException) { |
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135 | throw (IOException) e.getCause(); |
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136 | } |
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137 | throw new S3Exception(e); |
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138 | } |
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139 | } |
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140 | |
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141 | public InputStream retrieve(String key, long byteRangeStart) |
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142 | throws IOException { |
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143 | try { |
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144 | S3Object object = s3Service.getObject(bucket, key, null, null, null, |
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145 | null, byteRangeStart, null); |
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146 | return object.getDataInputStream(); |
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147 | } catch (S3ServiceException e) { |
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148 | if ("NoSuchKey".equals(e.getS3ErrorCode())) { |
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149 | return null; |
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150 | } |
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151 | if (e.getCause() instanceof IOException) { |
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152 | throw (IOException) e.getCause(); |
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153 | } |
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154 | throw new S3Exception(e); |
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155 | } |
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156 | } |
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157 | |
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158 | public PartialListing list(String prefix, int maxListingLength) |
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159 | throws IOException { |
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160 | return list(prefix, maxListingLength, null); |
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161 | } |
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162 | |
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163 | public PartialListing list(String prefix, int maxListingLength, |
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164 | String priorLastKey) throws IOException { |
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165 | |
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166 | return list(prefix, PATH_DELIMITER, maxListingLength, priorLastKey); |
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167 | } |
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168 | |
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169 | public PartialListing listAll(String prefix, int maxListingLength, |
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170 | String priorLastKey) throws IOException { |
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171 | |
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172 | return list(prefix, null, maxListingLength, priorLastKey); |
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173 | } |
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174 | |
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175 | private PartialListing list(String prefix, String delimiter, |
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176 | int maxListingLength, String priorLastKey) throws IOException { |
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177 | try { |
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178 | if (prefix.length() > 0 && !prefix.endsWith(PATH_DELIMITER)) { |
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179 | prefix += PATH_DELIMITER; |
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180 | } |
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181 | S3ObjectsChunk chunk = s3Service.listObjectsChunked(bucket.getName(), |
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182 | prefix, delimiter, maxListingLength, priorLastKey); |
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183 | |
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184 | FileMetadata[] fileMetadata = |
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185 | new FileMetadata[chunk.getObjects().length]; |
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186 | for (int i = 0; i < fileMetadata.length; i++) { |
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187 | S3Object object = chunk.getObjects()[i]; |
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188 | fileMetadata[i] = new FileMetadata(object.getKey(), |
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189 | object.getContentLength(), object.getLastModifiedDate().getTime()); |
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190 | } |
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191 | return new PartialListing(chunk.getPriorLastKey(), fileMetadata, |
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192 | chunk.getCommonPrefixes()); |
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193 | } catch (S3ServiceException e) { |
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194 | if (e.getCause() instanceof IOException) { |
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195 | throw (IOException) e.getCause(); |
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196 | } |
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197 | throw new S3Exception(e); |
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198 | } |
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199 | } |
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200 | |
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201 | public void delete(String key) throws IOException { |
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202 | try { |
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203 | s3Service.deleteObject(bucket, key); |
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204 | } catch (S3ServiceException e) { |
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205 | if (e.getCause() instanceof IOException) { |
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206 | throw (IOException) e.getCause(); |
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207 | } |
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208 | throw new S3Exception(e); |
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209 | } |
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210 | } |
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211 | |
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212 | public void rename(String srcKey, String dstKey) throws IOException { |
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213 | try { |
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214 | s3Service.moveObject(bucket.getName(), srcKey, bucket.getName(), |
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215 | new S3Object(dstKey), false); |
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216 | } catch (S3ServiceException e) { |
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217 | if (e.getCause() instanceof IOException) { |
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218 | throw (IOException) e.getCause(); |
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219 | } |
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220 | throw new S3Exception(e); |
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221 | } |
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222 | } |
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223 | |
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224 | public void purge(String prefix) throws IOException { |
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225 | try { |
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226 | S3Object[] objects = s3Service.listObjects(bucket, prefix, null); |
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227 | for (int i = 0; i < objects.length; i++) { |
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228 | s3Service.deleteObject(bucket, objects[i].getKey()); |
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229 | } |
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230 | } catch (S3ServiceException e) { |
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231 | if (e.getCause() instanceof IOException) { |
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232 | throw (IOException) e.getCause(); |
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233 | } |
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234 | throw new S3Exception(e); |
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235 | } |
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236 | } |
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237 | |
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238 | public void dump() throws IOException { |
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239 | StringBuilder sb = new StringBuilder("S3 Native Filesystem, "); |
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240 | sb.append(bucket.getName()).append("\n"); |
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241 | try { |
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242 | S3Object[] objects = s3Service.listObjects(bucket); |
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243 | for (int i = 0; i < objects.length; i++) { |
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244 | sb.append(objects[i].getKey()).append("\n"); |
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245 | } |
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246 | } catch (S3ServiceException e) { |
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247 | if (e.getCause() instanceof IOException) { |
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248 | throw (IOException) e.getCause(); |
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249 | } |
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250 | throw new S3Exception(e); |
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251 | } |
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252 | System.out.println(sb); |
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253 | } |
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254 | |
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255 | } |
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