Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java @ 175:16e6e661e6bf
Added code to delete collections.
artifacts/trunk@1401 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 04 Mar 2011 17:11:40 +0000 |
parents | 25d472a67a9f |
children | a0eff2227588 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2010 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 |
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9 package de.intevation.artifactdatabase; |
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10 |
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11 import de.intevation.artifacts.Artifact; |
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12 import de.intevation.artifacts.ArtifactCollection; |
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13 import de.intevation.artifacts.ArtifactCollectionFactory; |
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14 import de.intevation.artifacts.ArtifactFactory; |
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15 import de.intevation.artifacts.ArtifactSerializer; |
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16 import de.intevation.artifacts.User; |
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17 import de.intevation.artifacts.UserFactory; |
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18 |
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19 import de.intevation.artifacts.common.utils.XMLUtils; |
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20 |
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21 import java.sql.SQLException; |
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22 import java.sql.Timestamp; |
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23 import java.sql.Types; |
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24 |
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25 import java.util.ArrayList; |
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26 import java.util.Date; |
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27 |
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28 import org.apache.log4j.Logger; |
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29 |
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30 import org.w3c.dom.Document; |
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31 |
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32 /** |
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33 * The backend implements the low level layer used to store artifacts |
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34 * in a SQL database. |
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35 * |
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36 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> |
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37 */ |
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38 public class Backend |
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39 implements DatabaseCleaner.ArtifactReviver |
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40 { |
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41 private static Logger logger = Logger.getLogger(Backend.class); |
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42 |
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43 /** |
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44 * The SQL statement to create new artifact id inside the database. |
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45 */ |
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46 public static final String SQL_NEXT_ID = |
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47 SQL.get("artifacts.id.nextval"); |
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48 |
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49 /** |
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50 * The SQL statement to insert an artifact into the database. |
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51 */ |
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52 public static final String SQL_INSERT = |
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53 SQL.get("artifacts.insert"); |
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54 |
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55 /** |
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56 * The SQL statement to update some columns of an existing |
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57 * artifact in the database. |
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58 */ |
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59 public static final String SQL_UPDATE = |
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60 SQL.get("artifacts.update"); |
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61 |
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62 /** |
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63 * The SQL statement to touch the access time of an |
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64 * artifact inside the database. |
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65 */ |
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66 public static final String SQL_TOUCH = |
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67 SQL.get("artifacts.touch"); |
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68 |
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69 /** |
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70 * The SQL statement to load an artifact by a given |
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71 * identifier from the database. |
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72 */ |
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73 public static final String SQL_LOAD_BY_GID = |
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74 SQL.get("artifacts.select.gid"); |
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75 |
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76 /** |
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77 * The SQL statement to get the database id of an artifact |
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78 * identified by the identifier. |
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79 */ |
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80 public static final String SQL_GET_ID = |
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81 SQL.get("artifacts.get.id"); |
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82 |
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83 /** |
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84 * The SQL statement to replace the content of an |
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85 * existing artifact inside the database. |
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86 */ |
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87 public static final String SQL_REPLACE = |
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88 SQL.get("artifacts.replace"); |
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89 |
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90 // USER SQL |
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91 |
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92 public static final String SQL_USERS_NEXT_ID = |
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93 SQL.get("users.id.nextval"); |
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94 |
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95 public static final String SQL_USERS_INSERT = |
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96 SQL.get("users.insert"); |
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97 |
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98 public static final String SQL_USERS_SELECT_ID_BY_GID = |
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99 SQL.get("users.select.id.by.gid"); |
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100 |
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101 public static final String SQL_USERS_SELECT_GID = |
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102 SQL.get("users.select.gid"); |
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103 |
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104 public static final String SQL_USERS_DELETE_ID = |
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105 SQL.get("users.delete.id"); |
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106 |
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107 public static final String SQL_USERS_DELETE_COLLECTIONS = |
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108 SQL.get("users.delete.collections"); |
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109 |
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110 public static final String SQL_USERS_SELECT_ALL = |
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111 SQL.get("users.select.all"); |
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112 |
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113 public static final String SQL_USERS_COLLECTIONS = |
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114 SQL.get("users.collections"); |
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115 |
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116 public static final String SQL_USERS_COLLECTION_IDS = |
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117 SQL.get("users.collection.ids"); |
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118 |
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119 public static final String SQL_USERS_DELETE_ALL_COLLECTIONS = |
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120 SQL.get("users.delete.all.collections"); |
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121 |
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122 public static final String SQL_ARTIFACTS_IN_ONLY_COLLECTION_ONLY = |
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123 SQL.get("artifacts.in.one.collection.only"); |
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124 |
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125 public static final String SQL_OUTDATE_ARTIFACTS_COLLECTION = |
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126 SQL.get("outdate.artifacts.collection"); |
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127 |
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128 public static final String SQL_OUTDATE_ARTIFACTS_USER = |
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129 SQL.get("outdate.artifacts.user"); |
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130 |
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131 public static final String SQL_DELETE_USER_COLLECTION_ITEMS = |
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132 SQL.get("delete.user.collection.items"); |
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133 |
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134 public static final String SQL_COLLECTIONS_NEXT_ID = |
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135 SQL.get("collections.id.nextval"); |
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136 |
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137 public static final String SQL_COLLECTIONS_INSERT = |
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138 SQL.get("collections.insert"); |
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139 |
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140 public static final String SQL_COLLECTIONS_SELECT_USER = |
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141 SQL.get("collections.select.user"); |
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142 |
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143 public static final String SQL_COLLECTIONS_SELECT_ALL = |
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144 SQL.get("collections.select.all"); |
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145 |
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146 public static final String SQL_COLLECTIONS_CREATION_TIME = |
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147 SQL.get("collection.creation.time"); |
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148 |
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149 public static final String SQL_COLLECTIONS_ID_BY_GID = |
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150 SQL.get("collection.creation.time"); |
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151 |
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152 public static final String SQL_DELETE_COLLECTION_ITEMS = |
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153 SQL.get("delete.collection.items"); |
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154 |
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155 public static final String SQL_DELETE_COLLECTION = |
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156 SQL.get("delete.collection"); |
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157 |
128
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158 /** The singleton.*/ |
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159 protected static Backend instance; |
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160 |
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161 /** |
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162 * The database cleaner. Reference is stored here because |
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163 * the cleaner is woken up if the backend finds an outdated |
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164 * artifact. This artifact should be removed as soon as |
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165 * possible. |
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166 */ |
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167 protected DatabaseCleaner cleaner; |
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168 |
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169 /** |
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170 * To revive an artifact from the bytes coming from the database |
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171 * we need the artifact factory which references the artifact |
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172 * serializer which is able to do the reviving job. |
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173 */ |
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174 protected FactoryLookup factoryLookup; |
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175 |
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176 /** |
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177 * Little helper interface to decouple the ArtifactDatabase |
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178 * from the Backend. A ArtifactDatabase should depend on a |
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179 * Backend but a Backend not from an ArtifactDatabase. |
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180 */ |
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181 public interface FactoryLookup { |
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182 |
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183 /** |
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184 * Returns an ArtifactFactory which is bound to a given name. |
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185 * @param factoryName The name of the artifact factory. |
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186 * @return The ArtifactFactory bound to the factory name or |
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187 * null if not matching factory is found. |
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188 */ |
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189 ArtifactFactory getArtifactFactory(String factoryName); |
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190 |
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191 } // interface FactoryLookup |
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192 |
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193 /** |
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194 * Inner class that brigdes between the persisten form of the |
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195 * artifact and the living one inside the artifact database. |
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196 * After the describe(), feed(), advance() and out() operations |
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197 * of the artifact it must be possible to write to modified artifact |
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198 * back into the database. |
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199 */ |
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200 public final class PersistentArtifact |
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201 extends Id |
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202 { |
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203 private Artifact artifact; |
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204 private ArtifactSerializer serializer; |
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205 private Long ttl; |
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206 |
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207 /** |
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208 * Cronstructor to create a persistent artifact. |
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209 * @param artifact The living artifact. |
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210 * @param serializer The serializer to store the artifact |
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211 * after the operations. |
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212 * @param ttl The time to life of the artifact. |
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213 * @param id The database id of the artifact. |
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214 */ |
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215 public PersistentArtifact( |
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216 Artifact artifact, |
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217 ArtifactSerializer serializer, |
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218 Long ttl, |
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219 int id |
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220 ) { |
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221 super(id); |
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222 this.artifact = artifact; |
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223 this.serializer = serializer; |
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224 this.ttl = ttl; |
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225 } |
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226 |
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227 /** |
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228 * Returns the wrapped living artifact. |
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229 * @return the living artifact. |
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230 */ |
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231 public Artifact getArtifact() { |
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232 return artifact; |
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233 } |
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234 |
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235 /** |
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236 * Returns the serialized which is able to write a |
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237 * modified artifact back into the database. |
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238 * @return The serializer. |
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239 */ |
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240 public ArtifactSerializer getSerializer() { |
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241 return serializer; |
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242 } |
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243 |
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244 /** |
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245 * The time to life of the artifact. |
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246 * @return The time to live. |
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247 */ |
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248 public Long getTTL() { |
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249 return ttl; |
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250 } |
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251 |
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252 /** |
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253 * Stores the living artifact back into the database. |
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254 */ |
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255 public void store() { |
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256 if (logger.isDebugEnabled()) { |
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257 logger.debug("storing artifact id = " + getId()); |
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258 } |
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259 Backend.this.store(this); |
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260 } |
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261 |
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262 /** |
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263 * Only touches the access time of the artifact. |
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264 */ |
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265 public void touch() { |
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266 if (logger.isDebugEnabled()) { |
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267 logger.debug("touching artifact id = " + getId()); |
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268 } |
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269 Backend.this.touch(this); |
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270 } |
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271 } // class ArtifactWithId |
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272 |
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273 /** |
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274 * Default constructor |
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275 */ |
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276 public Backend() { |
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277 } |
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278 |
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279 /** |
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280 * Constructor to create a backend with a link to the database cleaner. |
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281 * @param cleaner The clean which periodically removes outdated |
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282 * artifacts from the database. |
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283 */ |
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284 public Backend(DatabaseCleaner cleaner) { |
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285 this.cleaner = cleaner; |
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286 } |
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287 |
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288 |
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289 /** |
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290 * Returns the singleton of this Backend. |
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291 * |
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292 * @return the backend. |
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293 */ |
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294 public static synchronized Backend getInstance() { |
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295 if (instance == null) { |
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296 instance = new Backend(); |
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297 } |
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298 |
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299 return instance; |
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300 } |
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301 |
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302 /** |
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303 * Sets the factory lookup mechanism to decouple ArtifactDatabase |
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304 * and Backend. |
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305 * @param factoryLookup |
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306 */ |
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307 public void setFactoryLookup(FactoryLookup factoryLookup) { |
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308 this.factoryLookup = factoryLookup; |
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309 } |
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310 |
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311 /** |
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312 * Sets the database cleaner explicitly. |
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313 * @param cleaner The database cleaner |
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314 */ |
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315 public void setCleaner(DatabaseCleaner cleaner) { |
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316 this.cleaner = cleaner; |
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317 } |
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318 |
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319 /** |
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320 * Returns a new unique identifier to external identify |
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321 * the artifact across the system. This implementation |
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322 * uses random UUIDs v4 to achieve this target. |
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323 * @return the new identifier |
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324 */ |
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325 public String newIdentifier() { |
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326 // TODO: check database for collisions. |
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327 return StringUtils.newUUID(); |
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328 } |
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329 |
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330 /** |
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331 * Stores a new artifact into the database. |
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332 * @param artifact The artifact to be stored |
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333 * @param factory The factory which build the artifact |
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334 * @param ttl The initial time to life of the artifact. |
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335 * @return A persistent wrapper around the living |
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336 * artifact to be able to write modification later. |
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337 * @throws Exception Thrown if something went wrong with the |
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338 * storage process. |
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339 */ |
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340 public PersistentArtifact storeInitially( |
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341 Artifact artifact, |
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342 ArtifactFactory factory, |
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343 Long ttl |
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344 ) |
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345 throws Exception |
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346 { |
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347 return new PersistentArtifact( |
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348 artifact, |
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349 factory.getSerializer(), |
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350 ttl, |
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351 insertDatabase(artifact, factory, ttl)); |
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352 } |
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353 |
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354 /** |
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355 * Stores an artifact into database if it does not exist there. |
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356 * If it exists there it is only updated. |
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357 * @param artifact The artifact to store/update. |
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358 * @param factory The factory which created the artifact. |
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359 * @param ttl The initial time to live of the artifact. |
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360 * @return A persistent version of the artifact to be able |
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361 * to store a modification later. |
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362 * @throws Exception Thrown if something went wrong during |
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363 * storing/updating. |
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364 */ |
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365 public PersistentArtifact storeOrReplace( |
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366 Artifact artifact, |
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367 ArtifactFactory factory, |
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368 Long ttl |
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369 ) |
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370 throws Exception |
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371 { |
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372 return new PersistentArtifact( |
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373 artifact, |
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374 factory.getSerializer(), |
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375 ttl, |
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376 storeOrReplaceDatabase(artifact, factory, ttl)); |
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377 } |
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378 |
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379 /** |
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380 * Implementors of this interface are able to process the raw |
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381 * artifact data from the database for loading. |
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382 */ |
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383 public interface ArtifactLoader { |
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384 |
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385 /** |
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386 * Creates a custom object from the raw artifact database data. |
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387 * @param factory The factory that created this artifact. |
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388 * @param ttl The current time to life of the artifact. |
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389 * @param bytes The raw artifact bytes from the database. |
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390 * @param id The database id of the artifact. |
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391 * @return The custom object created by the implementation. |
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392 */ |
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393 Object load(ArtifactFactory factory, Long ttl, byte [] bytes, int id); |
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394 |
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395 } // interface ArtifactLoader |
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396 |
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397 /** |
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398 * Fetches an artifact from the database identified by the |
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399 * given identifier. |
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400 * @param identifer The identifier of the artifact. |
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401 * @return A persistent wrapper around the found artifact |
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402 * to be able to write back a modifaction later or null |
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403 * if no artifact is found for this identifier. |
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404 */ |
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405 public PersistentArtifact getArtifact(String identifer) { |
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406 |
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407 return (PersistentArtifact)loadArtifact( |
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408 identifer, |
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409 new ArtifactLoader() { |
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410 |
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411 public Object load( |
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412 ArtifactFactory factory, |
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413 Long ttl, |
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414 byte [] bytes, |
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415 int id |
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416 ) { |
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417 ArtifactSerializer serializer = factory.getSerializer(); |
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418 |
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419 Artifact artifact = serializer.fromBytes(bytes); |
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420 |
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421 return artifact == null |
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422 ? null |
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423 : new PersistentArtifact(artifact, serializer, ttl, id); |
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424 } |
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425 }); |
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426 } |
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427 |
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428 /** |
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429 * More general loading mechanism for artifacts. The concrete |
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430 * load processing is delegated to the given loader. |
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431 * @param identifer The identifier of the artifact. |
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432 * @param loader The loader which processes the raw database data. |
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433 * @return The object created by the loader. |
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434 */ |
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435 public Object loadArtifact( |
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436 final String identifer, |
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437 final ArtifactLoader loader |
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438 ) { |
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439 if (!StringUtils.checkUUID(identifer)) { |
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440 return null; |
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441 } |
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442 |
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443 final Object [] loaded = new Object[1]; |
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444 |
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445 SQLExecutor exec = new SQLExecutor() { |
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446 public boolean doIt() throws SQLException { |
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447 prepareStatement(SQL_LOAD_BY_GID); |
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448 stmnt.setString(1, identifer); |
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449 |
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450 result = stmnt.executeQuery(); |
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451 |
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452 if (!result.next()) { |
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453 return false; |
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454 } |
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455 |
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456 int id = result.getInt(1); |
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457 long ttlX = result.getLong(3); |
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458 |
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459 Long ttl = result.wasNull() ? null : Long.valueOf(ttlX); |
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460 |
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461 if (ttl != null) { // real time to life |
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462 long last_access = result.getTimestamp(2).getTime(); |
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463 if (last_access + ttlX < System.currentTimeMillis()) { |
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464 artifactOutdated(id); |
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465 return false; |
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466 } |
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467 } |
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468 |
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469 String factoryName = result.getString(4); |
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470 |
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471 if (factoryLookup == null) { |
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472 logger.error("factory lookup == null"); |
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473 return false; |
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474 } |
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475 |
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476 ArtifactFactory factory = factoryLookup |
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477 .getArtifactFactory(factoryName); |
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478 |
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479 if (factory == null) { |
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480 logger.error("factory '" + factoryName + "' not found"); |
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481 return false; |
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482 } |
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483 |
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484 byte [] bytes = result.getBytes(5); |
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485 |
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486 loaded[0] = loader.load(factory, ttl, bytes, id); |
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487 return true; |
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488 } |
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489 }; |
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490 |
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491 return exec.runRead() ? loaded[0] : null; |
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492 } |
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493 |
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494 /** |
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495 * Called if the load mechanism found an outdated artifact. |
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496 * It wakes up the database cleaner. |
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497 * @param id The id of the outdated artifact. |
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498 */ |
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499 protected void artifactOutdated(int id) { |
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500 if (logger.isDebugEnabled()) { |
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501 logger.info("artifactOutdated: id = " + id); |
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502 } |
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503 if (cleaner != null) { |
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504 cleaner.wakeup(); |
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505 } |
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506 } |
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507 |
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508 public Artifact reviveArtifact(String factoryName, byte [] bytes) { |
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509 if (factoryLookup == null) { |
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510 logger.error("reviveArtifact: factory lookup == null"); |
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511 return null; |
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512 } |
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513 ArtifactFactory factory = factoryLookup |
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514 .getArtifactFactory(factoryName); |
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515 |
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516 if (factory == null) { |
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517 logger.error( |
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518 "reviveArtifact: no factory '" + factoryName + "' found"); |
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519 return null; |
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520 } |
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521 |
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522 ArtifactSerializer serializer = factory.getSerializer(); |
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523 |
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524 return serializer.fromBytes(bytes); |
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525 } |
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526 |
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527 /** |
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528 * Internal method to store/replace an artifact inside the database. |
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529 * If an artifact with the given identifier does not exists it is |
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530 * created else only the content data is updated. |
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531 * @param artifact The artifact to be store/update inside the database. |
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532 * @param factory The factory that created the artifact. |
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533 * @param ttl The initial time to life of the artifact. |
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534 * @return The database id of the stored/updated artifact. |
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535 */ |
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536 protected int storeOrReplaceDatabase( |
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537 final Artifact artifact, |
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538 final ArtifactFactory factory, |
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539 final Long ttl |
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540 ) { |
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541 final String uuid = artifact.identifier(); |
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542 |
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543 if (!StringUtils.checkUUID(uuid)) { |
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544 throw new RuntimeException("No valid UUID"); |
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545 } |
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546 |
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547 final int [] id = new int[1]; |
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548 |
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549 SQLExecutor exec = new SQLExecutor() { |
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550 public boolean doIt() throws SQLException { |
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551 |
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552 prepareStatement(SQL_GET_ID); |
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553 stmnt.setString(1, uuid); |
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554 result = stmnt.executeQuery(); |
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555 |
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556 Integer ID = result.next() |
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557 ? Integer.valueOf(result.getInt(1)) |
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558 : null; |
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559 |
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560 reset(); |
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561 |
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562 if (ID != null) { // already in database |
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563 prepareStatement(SQL_REPLACE); |
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564 |
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565 if (ttl == null) { |
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566 stmnt.setNull(1, Types.BIGINT); |
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567 } |
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568 else { |
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569 stmnt.setLong(1, ttl.longValue()); |
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570 } |
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571 |
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572 stmnt.setString(2, factory.getName()); |
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573 stmnt.setBytes( |
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574 3, |
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575 factory.getSerializer().toBytes(artifact)); |
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576 id[0] = ID.intValue(); |
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577 stmnt.setInt(4, id[0]); |
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578 } |
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579 else { // new artifact |
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580 prepareStatement(SQL_NEXT_ID); |
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581 result = stmnt.executeQuery(); |
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582 |
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583 if (!result.next()) { |
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584 logger.error("No id generated"); |
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585 return false; |
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586 } |
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587 |
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588 reset(); |
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589 |
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590 prepareStatement(SQL_INSERT); |
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591 |
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592 id[0] = result.getInt(1); |
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593 stmnt.setInt(1, id[0]); |
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594 stmnt.setString(2, uuid); |
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595 if (ttl == null) { |
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596 stmnt.setNull(3, Types.BIGINT); |
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597 } |
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598 else { |
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599 stmnt.setLong(3, ttl.longValue()); |
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600 } |
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601 |
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602 stmnt.setString(4, factory.getName()); |
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603 |
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604 stmnt.setBytes( |
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605 5, |
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606 factory.getSerializer().toBytes(artifact)); |
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607 } |
174
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608 stmnt.execute(); |
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609 conn.commit(); |
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610 return true; |
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611 } |
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612 }; |
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613 |
174
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614 if (!exec.runWrite()) { |
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615 throw new RuntimeException("failed insert artifact into database"); |
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616 } |
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617 |
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618 return id[0]; |
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619 } |
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620 |
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621 /** |
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622 * Internal method to store an artifact inside the database. |
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623 * @param artifact The artifact to be stored. |
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624 * @param factory The factory which created the artifact. |
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625 * @param ttl The initial time to live of the artifact. |
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626 * @return The database id of the stored artifact. |
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627 */ |
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628 protected int insertDatabase( |
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629 final Artifact artifact, |
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630 final ArtifactFactory factory, |
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631 final Long ttl |
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632 ) { |
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633 final int [] id = new int[1]; |
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634 |
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635 SQLExecutor exec = new SQLExecutor() { |
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636 public boolean doIt() throws SQLException { |
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637 prepareStatement(SQL_NEXT_ID); |
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638 result = stmnt.executeQuery(); |
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639 |
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640 if (!result.next()) { |
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641 logger.error("No id generated"); |
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642 return false; |
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643 } |
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644 |
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645 id[0] = result.getInt(1); |
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646 |
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647 reset(); |
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648 prepareStatement(SQL_INSERT); |
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649 |
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650 String uuid = artifact.identifier(); |
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651 stmnt.setInt(1, id[0]); |
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652 stmnt.setString(2, uuid); |
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653 if (ttl == null) { |
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654 stmnt.setNull(3, Types.BIGINT); |
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655 } |
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656 else { |
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657 stmnt.setLong(3, ttl.longValue()); |
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658 } |
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659 |
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660 stmnt.setString(4, factory.getName()); |
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661 |
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662 stmnt.setBytes( |
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663 5, |
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664 factory.getSerializer().toBytes(artifact)); |
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665 |
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666 stmnt.execute(); |
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667 |
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668 conn.commit(); |
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669 return true; |
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670 } |
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671 }; |
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672 |
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673 if (!exec.runWrite()) { |
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674 throw new RuntimeException("failed insert artifact into database"); |
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675 } |
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676 |
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677 return id[0]; |
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678 } |
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679 |
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680 /** |
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681 * Touches the access timestamp of a given artifact to prevent |
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682 * that it will be removed from the database by the database cleaner. |
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683 * @param artifact The persistent wrapper around the living artifact. |
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684 */ |
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685 public void touch(final PersistentArtifact artifact) { |
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686 new SQLExecutor() { |
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687 public boolean doIt() throws SQLException { |
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688 prepareStatement(SQL_TOUCH); |
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689 stmnt.setInt(1, artifact.getId()); |
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690 stmnt.execute(); |
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691 conn.commit(); |
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692 return true; |
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693 } |
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694 }.runWrite(); |
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695 } |
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696 |
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697 /** |
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698 * Writes modification of an artifact back to the database. |
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699 * @param artifact The persistent wrapper around a living |
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700 * artifact. |
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701 */ |
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702 public void store(final PersistentArtifact artifact) { |
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703 new SQLExecutor() { |
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704 public boolean doIt() throws SQLException { |
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705 prepareStatement(SQL_UPDATE); |
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706 stmnt.setInt(2, artifact.getId()); |
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707 |
174
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708 byte [] bytes = artifact |
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709 .getSerializer() |
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710 .toBytes(artifact.getArtifact()); |
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711 |
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712 stmnt.setBytes(1, bytes); |
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713 stmnt.execute(); |
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714 conn.commit(); |
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715 return true; |
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716 } |
174
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717 }.runWrite(); |
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718 } |
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719 |
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720 public User createUser( |
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721 final String name, |
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722 final Document role, |
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723 final UserFactory factory, |
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724 final Object context |
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725 ) { |
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726 final User [] user = new User[1]; |
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727 |
174
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728 SQLExecutor exec = new SQLExecutor() { |
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729 public boolean doIt() throws SQLException { |
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730 |
174
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731 prepareStatement(SQL_USERS_NEXT_ID); |
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732 result = stmnt.executeQuery(); |
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733 |
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734 if (!result.next()) { |
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735 return false; |
138
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736 } |
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737 |
145
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738 int id = result.getInt(1); |
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739 |
174
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740 reset(); |
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741 |
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742 String identifier = newIdentifier(); |
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743 |
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744 prepareStatement(SQL_USERS_INSERT); |
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745 |
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746 stmnt.setInt(1, id); |
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747 stmnt.setString(2, identifier); |
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748 stmnt.setString(3, name); |
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749 |
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750 byte [] roleData = role == null |
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751 ? null |
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752 : XMLUtils.toByteArray(role); |
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753 |
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754 if (roleData == null) { |
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755 stmnt.setNull(4, Types.BIGINT); |
138
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756 } |
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757 else { |
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758 stmnt.setBytes(4, roleData); |
138
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759 } |
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760 |
174
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761 stmnt.execute(); |
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762 conn.commit(); |
138
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763 |
174
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764 user[0] = factory.createUser( |
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765 identifier, name, role, context); |
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766 return true; |
138
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767 } |
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768 }; |
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769 |
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770 return exec.runWrite() ? user[0] : null; |
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771 } |
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|
772 |
174
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773 public boolean deleteUser(final String identifier) { |
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774 |
147
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775 if (!StringUtils.checkUUID(identifier)) { |
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776 return false; |
147
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777 } |
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|
778 |
174
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779 SQLExecutor exec = new SQLExecutor() { |
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780 public boolean doIt() throws SQLException { |
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781 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
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782 |
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783 stmnt.setString(1, identifier); |
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784 result = stmnt.executeQuery(); |
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785 |
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786 if (!result.next()) { // No such user |
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787 return false; |
144
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788 } |
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|
789 |
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790 int id = result.getInt(1); |
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791 |
174
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792 reset(); |
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793 |
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794 // outdate the artifacts exclusively used by the user |
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795 |
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796 prepareStatement(SQL_OUTDATE_ARTIFACTS_USER); |
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797 stmnt.setInt(1, id); |
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798 stmnt.setInt(2, id); |
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799 stmnt.execute(); |
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800 |
174
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801 reset(); |
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802 |
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803 // delete the collection items of the user |
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804 |
174
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805 prepareStatement(SQL_DELETE_USER_COLLECTION_ITEMS); |
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806 stmnt.setInt(1, id); |
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807 stmnt.execute(); |
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808 |
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809 reset(); |
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810 |
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811 // delete the collections of the user |
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812 |
174
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813 prepareStatement(SQL_USERS_DELETE_COLLECTIONS); |
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814 stmnt.setInt(1, id); |
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815 stmnt.execute(); |
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816 |
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817 reset(); |
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818 |
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819 // delete the user |
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820 |
174
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821 prepareStatement(SQL_USERS_DELETE_ID); |
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822 stmnt.setInt(1, id); |
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823 stmnt.execute(); |
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824 |
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825 conn.commit(); |
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826 return true; |
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827 } |
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828 }; |
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829 |
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830 return exec.runWrite(); |
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831 } |
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832 |
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833 public User getUser( |
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834 final String identifier, |
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835 final UserFactory factory, |
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836 final Object context |
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837 ) { |
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838 if (!StringUtils.checkUUID(identifier)) { |
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839 logger.debug("Invalid UUID: '" + identifier + "'"); |
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840 return null; |
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841 } |
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842 |
174
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843 final User [] user = new User[1]; |
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844 |
174
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845 SQLExecutor exec = new SQLExecutor() { |
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846 public boolean doIt() throws SQLException { |
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847 prepareStatement(SQL_USERS_SELECT_GID); |
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848 stmnt.setString(1, identifier); |
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849 result = stmnt.executeQuery(); |
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850 if (!result.next()) { // no such user |
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851 return false; |
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852 } |
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853 // omit id |
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854 String name = result.getString(2); |
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855 byte [] roleData = result.getBytes(3); |
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856 |
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857 Document role = XMLUtils.fromByteArray(roleData); |
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858 |
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859 user[0] = factory.createUser( |
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860 identifier, name, role, context); |
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861 return true; |
147
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862 } |
174
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863 }; |
147
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864 |
174
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865 return exec.runRead() ? user[0] : null; |
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|
866 } |
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|
867 |
174
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868 public User [] getUsers( |
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869 final UserFactory factory, |
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870 final Object context |
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871 ) { |
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872 final ArrayList<User> users = new ArrayList<User>(); |
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873 |
174
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874 SQLExecutor exec = new SQLExecutor() { |
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875 public boolean doIt() throws SQLException { |
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876 prepareStatement(SQL_USERS_SELECT_ALL); |
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877 result = stmnt.executeQuery(); |
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878 |
174
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879 while (result.next()) { |
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880 // omit id |
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881 String identifier = result.getString(2); |
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882 String name = result.getString(3); |
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883 byte [] roleData = result.getBytes(4); |
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884 |
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885 Document role = XMLUtils.fromByteArray(roleData); |
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886 User user = factory.createUser( |
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887 identifier, name, role, context); |
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888 users.add(user); |
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889 } |
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890 return true; |
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891 } |
174
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892 }; |
148
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893 |
174
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894 return exec.runRead() |
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895 ? users.toArray(new User[users.size()]) |
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896 : null; |
133
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897 } |
156
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898 |
159
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|
899 public ArtifactCollection createCollection( |
174
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900 final String ownerIdentifier, |
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901 final String name, |
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902 final ArtifactCollectionFactory factory, |
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903 final Document data, |
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904 final Object context |
159
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905 ) { |
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906 if (name == null) { |
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907 logger.debug("Name is null"); |
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908 return null; |
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|
909 } |
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|
910 |
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|
911 if (!StringUtils.checkUUID(ownerIdentifier)) { |
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|
912 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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913 return null; |
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|
914 } |
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|
915 |
174
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916 final ArtifactCollection [] collection = |
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917 new ArtifactCollection[1]; |
159
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918 |
174
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919 SQLExecutor exec = new SQLExecutor() { |
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920 public boolean doIt() throws SQLException { |
159
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921 // fetch owner id |
174
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922 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
159
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923 stmnt.setString(1, ownerIdentifier); |
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924 result = stmnt.executeQuery(); |
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925 |
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926 if (!result.next()) { // no such user |
174
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927 return false; |
159
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|
928 } |
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|
929 |
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930 int ownerId = result.getInt(1); |
174
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931 reset(); |
159
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|
932 |
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|
933 // fetch new collection seq number. |
174
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|
934 prepareStatement(SQL_COLLECTIONS_NEXT_ID); |
159
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|
935 result = stmnt.executeQuery(); |
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|
936 |
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|
937 if (!result.next()) { // no identifier generated |
174
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|
938 return false; |
159
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|
939 } |
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|
940 |
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|
941 int id = result.getInt(1); |
174
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|
942 reset(); |
159
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|
943 |
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|
944 String identifier = newIdentifier(); |
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|
945 |
174
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|
946 prepareStatement(SQL_COLLECTIONS_INSERT); |
159
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|
947 |
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|
948 stmnt.setInt(1, id); |
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|
949 stmnt.setString(2, identifier); |
161
e4a1562dfc21
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diff
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|
950 stmnt.setString(3, name); |
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|
951 stmnt.setInt(4, ownerId); |
159
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|
952 |
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|
953 // XXX: A bit odd: we don't have a collection, yet. |
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954 Long ttl = factory.timeToLiveUntouched(null, context); |
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|
955 |
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|
956 if (ttl == null) { |
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|
957 stmnt.setNull(5, Types.BIGINT); |
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|
958 } |
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|
959 else { |
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|
960 stmnt.setLong(5, ttl); |
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|
961 } |
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|
962 |
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|
963 stmnt.execute(); |
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|
964 conn.commit(); |
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|
965 |
174
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|
966 reset(); |
170
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|
967 |
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|
968 // fetch creation time from database |
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|
969 // done this way to use the time system |
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|
970 // of the database. |
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|
971 |
174
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|
972 prepareStatement(SQL_COLLECTIONS_CREATION_TIME); |
170
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|
973 stmnt.setInt(1, id); |
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|
974 |
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|
975 result = stmnt.executeQuery(); |
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|
976 |
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|
977 Date creationTime = null; |
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|
978 |
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|
979 if (result.next()) { |
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|
980 Timestamp timestamp = result.getTimestamp(1); |
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|
981 creationTime = new Date(timestamp.getTime()); |
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|
982 } |
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|
983 |
174
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|
984 collection[0] = factory.createCollection( |
170
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|
985 identifier, name, creationTime, data, context); |
174
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|
986 |
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|
987 return true; |
159
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|
988 } |
174
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|
989 }; |
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990 |
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|
991 return exec.runWrite() ? collection[0]: null; |
156
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|
992 } |
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|
993 |
164
268c2972d4a7
Implemented the interface method listCollections() in the artifact database.
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|
994 public ArtifactCollection [] listCollections( |
174
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995 final String ownerIdentifier, |
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996 final Document data, |
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997 final ArtifactCollectionFactory collectionFactory, |
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998 final UserFactory userFactory, |
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999 final Object context |
167
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|
1000 ) { |
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1001 if (ownerIdentifier != null |
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1002 && !StringUtils.checkUUID(ownerIdentifier)) { |
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|
1003 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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1004 return null; |
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1005 } |
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|
1006 |
174
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1007 final ArrayList<ArtifactCollection> collections = |
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1008 new ArrayList<ArtifactCollection>(); |
167
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1009 |
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1010 SQLExecutor exec = new SQLExecutor() { |
167
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1011 |
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1012 public boolean doIt() throws SQLException { |
167
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1013 |
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1014 if (ownerIdentifier != null) { |
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1015 prepareStatement(SQL_COLLECTIONS_SELECT_USER); |
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1016 stmnt.setString(1, ownerIdentifier); |
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1017 } |
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1018 else { |
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1019 prepareStatement(SQL_COLLECTIONS_SELECT_ALL); |
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1020 } |
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1021 |
174
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1022 result = stmnt.executeQuery(); |
167
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1023 |
174
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1024 while (result.next()) { |
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1025 String collectionIdentifier = result.getString(1); |
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1026 String collectionName = result.getString(2); |
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1027 Date creationTime = |
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1028 new Date(result.getTimestamp(3).getTime()); |
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1029 String userIdentifier = result.getString(4); |
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1030 |
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1031 ArtifactCollection collection = |
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1032 collectionFactory.createCollection( |
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1033 collectionIdentifier, |
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1034 collectionName, |
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1035 creationTime, |
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1036 data, |
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1037 context); |
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1038 |
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1039 if (userIdentifier != null) { |
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1040 collection.setUser(new LazyBackendUser( |
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1041 userIdentifier, userFactory, Backend.this, context)); |
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1042 } |
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1043 |
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1044 collections.add(collection); |
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1045 } |
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1046 return true; |
167
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1047 } |
174
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1048 }; |
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1049 |
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1050 return exec.runRead() |
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1051 ? collections.toArray(new ArtifactCollection[collections.size()]) |
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1052 : null; |
156
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1053 } |
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1054 |
174
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1055 |
175
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1056 public boolean deleteCollection(final String collectionId) { |
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1057 if (!StringUtils.checkUUID(collectionId)) { |
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1058 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1059 return false; |
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1060 } |
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1061 SQLExecutor exec = new SQLExecutor() { |
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1062 public boolean doIt() throws SQLException { |
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1063 // fetch collection id |
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1064 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1065 stmnt.setString(1, collectionId); |
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1066 result = stmnt.executeQuery(); |
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1067 if (!result.next()) { |
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1068 logger.debug("No such collection: " + collectionId); |
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1069 return false; |
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1070 } |
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1071 int id = result.getInt(1); |
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1072 reset(); |
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1073 |
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1074 // outdate artifacts that are only in this collection |
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1075 prepareStatement(SQL_OUTDATE_ARTIFACTS_COLLECTION); |
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1076 stmnt.setInt(1, id); |
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1077 stmnt.setInt(2, id); |
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1078 stmnt.execute(); |
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1079 reset(); |
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1080 |
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1081 // delete the collection items |
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1082 prepareStatement(SQL_DELETE_COLLECTION_ITEMS); |
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1083 stmnt.setInt(1, id); |
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1084 stmnt.execute(); |
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1085 reset(); |
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1086 |
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1087 // delete the collection |
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1088 prepareStatement(SQL_DELETE_COLLECTION); |
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1089 stmnt.setInt(1, id); |
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1090 stmnt.execute(); |
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1091 conn.commit(); |
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1092 return true; |
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1093 } |
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1094 }; |
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1095 return exec.runWrite(); |
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1096 } |
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1097 |
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1098 public Document getCollectionAttribute( |
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1099 String collectionId, |
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1100 String artifactId |
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1101 ) { |
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1102 // TODO: Implement me! |
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1103 return null; |
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1104 } |
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1105 |
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1106 public boolean setCollectionAttribute( |
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1107 String collectionId, |
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1108 String artifactId, |
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1109 Document attribute |
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1110 ) { |
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1111 // TODO: Implement me! |
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1112 return false; |
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1113 } |
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1114 |
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1115 public boolean addCollectionArtifact( |
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1116 String collectionId, |
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1117 String artifactId |
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1118 ) { |
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1119 // TODO: Implement me! |
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1120 return false; |
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1121 } |
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1122 |
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1123 public boolean removeCollectionArtifact( |
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1124 String collectionId, |
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1125 String artifactId |
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1126 ) { |
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1127 // TODO: Implement me! |
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Added stubs for the collection handling in db backend.
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1128 return false; |
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Added stubs for the collection handling in db backend.
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parents:
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1129 } |
a76de72ad6d1
Added stubs for the collection handling in db backend.
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1130 |
157
6e6965873a48
Simplified creation of users.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1131 public ArtifactCollection [] listCollectionArtifacts(String collectionId) { |
156
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Added stubs for the collection handling in db backend.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1132 // TODO: Implement me! |
a76de72ad6d1
Added stubs for the collection handling in db backend.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1133 return null; |
a76de72ad6d1
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parents:
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1134 } |
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Added stubs for the collection handling in db backend.
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1135 |
13
0d6badf6af42
Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1136 } |
79
f69e5b87f05f
Implementation to export artifacts as xml (applied patch from issue208 by SLT).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1137 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |