Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java @ 178:535e4ea2ef9b
Added code to get the attribute of a collection item
artifacts/trunk@1404 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 06 Mar 2011 10:27:16 +0000 |
parents | 77cd37a93fca |
children | 644fd11ddd9f |
rev | line source |
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100
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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 |
167
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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 |
176
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158 public static final String SQL_COLLECTION_CHECK_ARTIFACT = |
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159 SQL.get("collection.check.artifact"); |
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160 |
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161 public static final String SQL_COLLECTION_ITEMS_ID_NEXTVAL = |
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162 SQL.get("collection.check.artifact"); |
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163 |
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164 public static final String SQL_COLLECTION_ITEMS_INSERT = |
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165 SQL.get("collection.items.insert"); |
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166 |
178
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167 public static final String SQL_COLLECTION_ITEM_GET_ATTRIBUTE = |
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168 SQL.get("collection.item.get.attribute"); |
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169 |
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170 /** The singleton.*/ |
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171 protected static Backend instance; |
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172 |
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173 /** |
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174 * The database cleaner. Reference is stored here because |
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175 * the cleaner is woken up if the backend finds an outdated |
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176 * artifact. This artifact should be removed as soon as |
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177 * possible. |
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178 */ |
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179 protected DatabaseCleaner cleaner; |
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180 |
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181 /** |
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182 * To revive an artifact from the bytes coming from the database |
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183 * we need the artifact factory which references the artifact |
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184 * serializer which is able to do the reviving job. |
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185 */ |
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186 protected FactoryLookup factoryLookup; |
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187 |
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188 /** |
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189 * Little helper interface to decouple the ArtifactDatabase |
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190 * from the Backend. A ArtifactDatabase should depend on a |
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191 * Backend but a Backend not from an ArtifactDatabase. |
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192 */ |
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193 public interface FactoryLookup { |
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194 |
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195 /** |
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196 * Returns an ArtifactFactory which is bound to a given name. |
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197 * @param factoryName The name of the artifact factory. |
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198 * @return The ArtifactFactory bound to the factory name or |
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199 * null if not matching factory is found. |
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200 */ |
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201 ArtifactFactory getArtifactFactory(String factoryName); |
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202 |
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203 } // interface FactoryLookup |
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204 |
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205 /** |
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206 * Inner class that brigdes between the persisten form of the |
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207 * artifact and the living one inside the artifact database. |
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208 * After the describe(), feed(), advance() and out() operations |
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209 * of the artifact it must be possible to write to modified artifact |
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210 * back into the database. |
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211 */ |
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212 public final class PersistentArtifact |
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213 extends Id |
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214 { |
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215 private Artifact artifact; |
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216 private ArtifactSerializer serializer; |
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217 private Long ttl; |
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218 |
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219 /** |
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220 * Cronstructor to create a persistent artifact. |
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221 * @param artifact The living artifact. |
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222 * @param serializer The serializer to store the artifact |
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223 * after the operations. |
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224 * @param ttl The time to life of the artifact. |
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225 * @param id The database id of the artifact. |
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226 */ |
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227 public PersistentArtifact( |
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228 Artifact artifact, |
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229 ArtifactSerializer serializer, |
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230 Long ttl, |
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231 int id |
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232 ) { |
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233 super(id); |
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234 this.artifact = artifact; |
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235 this.serializer = serializer; |
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236 this.ttl = ttl; |
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237 } |
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238 |
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239 /** |
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240 * Returns the wrapped living artifact. |
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241 * @return the living artifact. |
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242 */ |
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243 public Artifact getArtifact() { |
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244 return artifact; |
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245 } |
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246 |
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247 /** |
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248 * Returns the serialized which is able to write a |
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249 * modified artifact back into the database. |
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250 * @return The serializer. |
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251 */ |
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252 public ArtifactSerializer getSerializer() { |
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253 return serializer; |
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254 } |
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255 |
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256 /** |
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257 * The time to life of the artifact. |
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258 * @return The time to live. |
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259 */ |
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260 public Long getTTL() { |
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261 return ttl; |
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262 } |
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263 |
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264 /** |
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265 * Stores the living artifact back into the database. |
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266 */ |
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267 public void store() { |
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268 if (logger.isDebugEnabled()) { |
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269 logger.debug("storing artifact id = " + getId()); |
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270 } |
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271 Backend.this.store(this); |
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272 } |
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273 |
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274 /** |
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275 * Only touches the access time of the artifact. |
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276 */ |
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277 public void touch() { |
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278 if (logger.isDebugEnabled()) { |
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279 logger.debug("touching artifact id = " + getId()); |
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280 } |
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281 Backend.this.touch(this); |
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282 } |
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283 } // class ArtifactWithId |
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284 |
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285 /** |
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286 * Default constructor |
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287 */ |
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288 public Backend() { |
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289 } |
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290 |
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291 /** |
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292 * Constructor to create a backend with a link to the database cleaner. |
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293 * @param cleaner The clean which periodically removes outdated |
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294 * artifacts from the database. |
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295 */ |
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296 public Backend(DatabaseCleaner cleaner) { |
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297 this.cleaner = cleaner; |
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298 } |
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299 |
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300 |
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301 /** |
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302 * Returns the singleton of this Backend. |
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303 * |
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304 * @return the backend. |
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305 */ |
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306 public static synchronized Backend getInstance() { |
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307 if (instance == null) { |
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308 instance = new Backend(); |
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309 } |
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310 |
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311 return instance; |
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312 } |
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313 |
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314 /** |
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315 * Sets the factory lookup mechanism to decouple ArtifactDatabase |
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316 * and Backend. |
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317 * @param factoryLookup |
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318 */ |
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319 public void setFactoryLookup(FactoryLookup factoryLookup) { |
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320 this.factoryLookup = factoryLookup; |
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321 } |
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322 |
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323 /** |
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324 * Sets the database cleaner explicitly. |
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325 * @param cleaner The database cleaner |
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326 */ |
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327 public void setCleaner(DatabaseCleaner cleaner) { |
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328 this.cleaner = cleaner; |
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329 } |
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330 |
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331 /** |
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332 * Returns a new unique identifier to external identify |
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333 * the artifact across the system. This implementation |
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334 * uses random UUIDs v4 to achieve this target. |
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335 * @return the new identifier |
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336 */ |
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337 public String newIdentifier() { |
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338 // TODO: check database for collisions. |
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339 return StringUtils.newUUID(); |
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340 } |
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341 |
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342 public boolean isValidIdentifier(String identifier) { |
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343 return StringUtils.checkUUID(identifier); |
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344 } |
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345 |
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346 /** |
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347 * Stores a new artifact into the database. |
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348 * @param artifact The artifact to be stored |
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349 * @param factory The factory which build the artifact |
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350 * @param ttl The initial time to life of the artifact. |
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351 * @return A persistent wrapper around the living |
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352 * artifact to be able to write modification later. |
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353 * @throws Exception Thrown if something went wrong with the |
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354 * storage process. |
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355 */ |
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356 public PersistentArtifact storeInitially( |
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357 Artifact artifact, |
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358 ArtifactFactory factory, |
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359 Long ttl |
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360 ) |
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361 throws Exception |
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362 { |
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363 return new PersistentArtifact( |
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364 artifact, |
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365 factory.getSerializer(), |
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366 ttl, |
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367 insertDatabase(artifact, factory, ttl)); |
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368 } |
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369 |
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370 /** |
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371 * Stores an artifact into database if it does not exist there. |
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372 * If it exists there it is only updated. |
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373 * @param artifact The artifact to store/update. |
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374 * @param factory The factory which created the artifact. |
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375 * @param ttl The initial time to live of the artifact. |
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376 * @return A persistent version of the artifact to be able |
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377 * to store a modification later. |
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378 * @throws Exception Thrown if something went wrong during |
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379 * storing/updating. |
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380 */ |
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381 public PersistentArtifact storeOrReplace( |
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382 Artifact artifact, |
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383 ArtifactFactory factory, |
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384 Long ttl |
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385 ) |
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386 throws Exception |
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387 { |
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388 return new PersistentArtifact( |
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389 artifact, |
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390 factory.getSerializer(), |
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391 ttl, |
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392 storeOrReplaceDatabase(artifact, factory, ttl)); |
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393 } |
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394 |
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395 /** |
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396 * Implementors of this interface are able to process the raw |
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397 * artifact data from the database for loading. |
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398 */ |
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399 public interface ArtifactLoader { |
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400 |
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401 /** |
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402 * Creates a custom object from the raw artifact database data. |
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403 * @param factory The factory that created this artifact. |
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404 * @param ttl The current time to life of the artifact. |
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405 * @param bytes The raw artifact bytes from the database. |
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406 * @param id The database id of the artifact. |
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407 * @return The custom object created by the implementation. |
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408 */ |
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409 Object load(ArtifactFactory factory, Long ttl, byte [] bytes, int id); |
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410 |
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411 } // interface ArtifactLoader |
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412 |
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413 /** |
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414 * Fetches an artifact from the database identified by the |
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415 * given identifier. |
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416 * @param identifer The identifier of the artifact. |
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417 * @return A persistent wrapper around the found artifact |
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418 * to be able to write back a modifaction later or null |
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419 * if no artifact is found for this identifier. |
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420 */ |
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421 public PersistentArtifact getArtifact(String identifer) { |
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422 |
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423 return (PersistentArtifact)loadArtifact( |
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424 identifer, |
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425 new ArtifactLoader() { |
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426 |
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427 public Object load( |
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428 ArtifactFactory factory, |
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429 Long ttl, |
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430 byte [] bytes, |
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431 int id |
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432 ) { |
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433 ArtifactSerializer serializer = factory.getSerializer(); |
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434 |
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435 Artifact artifact = serializer.fromBytes(bytes); |
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436 |
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437 return artifact == null |
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438 ? null |
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439 : new PersistentArtifact(artifact, serializer, ttl, id); |
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440 } |
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441 }); |
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442 } |
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443 |
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444 /** |
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445 * More general loading mechanism for artifacts. The concrete |
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446 * load processing is delegated to the given loader. |
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447 * @param identifer The identifier of the artifact. |
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448 * @param loader The loader which processes the raw database data. |
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449 * @return The object created by the loader. |
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450 */ |
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451 public Object loadArtifact( |
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452 final String identifer, |
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453 final ArtifactLoader loader |
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454 ) { |
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455 if (!isValidIdentifier(identifer)) { |
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456 return null; |
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457 } |
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458 |
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459 final Object [] loaded = new Object[1]; |
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460 |
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461 SQLExecutor exec = new SQLExecutor() { |
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462 public boolean doIt() throws SQLException { |
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463 prepareStatement(SQL_LOAD_BY_GID); |
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464 stmnt.setString(1, identifer); |
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465 |
174
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466 result = stmnt.executeQuery(); |
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467 |
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468 if (!result.next()) { |
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469 return false; |
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470 } |
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471 |
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472 int id = result.getInt(1); |
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473 long ttlX = result.getLong(3); |
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474 |
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475 Long ttl = result.wasNull() ? null : Long.valueOf(ttlX); |
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476 |
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477 if (ttl != null) { // real time to life |
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478 long last_access = result.getTimestamp(2).getTime(); |
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479 if (last_access + ttlX < System.currentTimeMillis()) { |
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480 artifactOutdated(id); |
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481 return false; |
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482 } |
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483 } |
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484 |
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485 String factoryName = result.getString(4); |
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486 |
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487 if (factoryLookup == null) { |
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488 logger.error("factory lookup == null"); |
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489 return false; |
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490 } |
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491 |
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492 ArtifactFactory factory = factoryLookup |
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493 .getArtifactFactory(factoryName); |
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494 |
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495 if (factory == null) { |
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496 logger.error("factory '" + factoryName + "' not found"); |
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497 return false; |
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498 } |
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499 |
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500 byte [] bytes = result.getBytes(5); |
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501 |
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502 loaded[0] = loader.load(factory, ttl, bytes, id); |
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503 return true; |
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504 } |
174
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505 }; |
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506 |
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507 return exec.runRead() ? loaded[0] : null; |
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508 } |
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509 |
90
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510 /** |
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511 * Called if the load mechanism found an outdated artifact. |
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512 * It wakes up the database cleaner. |
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513 * @param id The id of the outdated artifact. |
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514 */ |
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515 protected void artifactOutdated(int id) { |
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516 if (logger.isDebugEnabled()) { |
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517 logger.info("artifactOutdated: id = " + id); |
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518 } |
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519 if (cleaner != null) { |
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520 cleaner.wakeup(); |
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521 } |
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522 } |
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523 |
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524 public Artifact reviveArtifact(String factoryName, byte [] bytes) { |
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525 if (factoryLookup == null) { |
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526 logger.error("reviveArtifact: factory lookup == null"); |
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527 return null; |
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528 } |
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529 ArtifactFactory factory = factoryLookup |
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530 .getArtifactFactory(factoryName); |
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531 |
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532 if (factory == null) { |
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533 logger.error( |
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534 "reviveArtifact: no factory '" + factoryName + "' found"); |
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535 return null; |
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536 } |
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537 |
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538 ArtifactSerializer serializer = factory.getSerializer(); |
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539 |
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540 return serializer.fromBytes(bytes); |
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541 } |
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542 |
90
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543 /** |
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544 * Internal method to store/replace an artifact inside the database. |
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545 * If an artifact with the given identifier does not exists it is |
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546 * created else only the content data is updated. |
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547 * @param artifact The artifact to be store/update inside the database. |
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548 * @param factory The factory that created the artifact. |
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549 * @param ttl The initial time to life of the artifact. |
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550 * @return The database id of the stored/updated artifact. |
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551 */ |
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552 protected int storeOrReplaceDatabase( |
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553 final Artifact artifact, |
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554 final ArtifactFactory factory, |
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555 final Long ttl |
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556 ) { |
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557 final String uuid = artifact.identifier(); |
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558 |
177
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Backend: isIdentifierValid more symmetric to new newIndentifier
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559 if (!isValidIdentifier(uuid)) { |
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560 throw new RuntimeException("No valid UUID"); |
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561 } |
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562 |
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563 final int [] id = new int[1]; |
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564 |
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565 SQLExecutor exec = new SQLExecutor() { |
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566 public boolean doIt() throws SQLException { |
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567 |
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568 prepareStatement(SQL_GET_ID); |
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569 stmnt.setString(1, uuid); |
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570 result = stmnt.executeQuery(); |
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571 |
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572 Integer ID = result.next() |
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573 ? Integer.valueOf(result.getInt(1)) |
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574 : null; |
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575 |
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576 reset(); |
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577 |
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578 if (ID != null) { // already in database |
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579 prepareStatement(SQL_REPLACE); |
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580 |
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581 if (ttl == null) { |
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582 stmnt.setNull(1, Types.BIGINT); |
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583 } |
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584 else { |
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585 stmnt.setLong(1, ttl.longValue()); |
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586 } |
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587 |
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588 stmnt.setString(2, factory.getName()); |
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589 stmnt.setBytes( |
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590 3, |
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591 factory.getSerializer().toBytes(artifact)); |
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592 id[0] = ID.intValue(); |
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593 stmnt.setInt(4, id[0]); |
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594 } |
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595 else { // new artifact |
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596 prepareStatement(SQL_NEXT_ID); |
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597 result = stmnt.executeQuery(); |
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598 |
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599 if (!result.next()) { |
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600 logger.error("No id generated"); |
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601 return false; |
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602 } |
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603 |
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604 reset(); |
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605 |
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606 prepareStatement(SQL_INSERT); |
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607 |
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608 id[0] = result.getInt(1); |
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609 stmnt.setInt(1, id[0]); |
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610 stmnt.setString(2, uuid); |
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611 if (ttl == null) { |
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612 stmnt.setNull(3, Types.BIGINT); |
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613 } |
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614 else { |
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615 stmnt.setLong(3, ttl.longValue()); |
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616 } |
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617 |
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618 stmnt.setString(4, factory.getName()); |
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619 |
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620 stmnt.setBytes( |
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621 5, |
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622 factory.getSerializer().toBytes(artifact)); |
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623 } |
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624 stmnt.execute(); |
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625 conn.commit(); |
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626 return true; |
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627 } |
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628 }; |
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629 |
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630 if (!exec.runWrite()) { |
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631 throw new RuntimeException("failed insert artifact into database"); |
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632 } |
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633 |
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634 return id[0]; |
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635 } |
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636 |
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637 /** |
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638 * Internal method to store an artifact inside the database. |
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639 * @param artifact The artifact to be stored. |
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640 * @param factory The factory which created the artifact. |
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641 * @param ttl The initial time to live of the artifact. |
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642 * @return The database id of the stored artifact. |
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643 */ |
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644 protected int insertDatabase( |
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645 final Artifact artifact, |
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646 final ArtifactFactory factory, |
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647 final Long ttl |
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648 ) { |
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649 final int [] id = new int[1]; |
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650 |
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651 SQLExecutor exec = new SQLExecutor() { |
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652 public boolean doIt() throws SQLException { |
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653 prepareStatement(SQL_NEXT_ID); |
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654 result = stmnt.executeQuery(); |
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655 |
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656 if (!result.next()) { |
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657 logger.error("No id generated"); |
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658 return false; |
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659 } |
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660 |
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661 id[0] = result.getInt(1); |
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662 |
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663 reset(); |
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664 prepareStatement(SQL_INSERT); |
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665 |
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666 String uuid = artifact.identifier(); |
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667 stmnt.setInt(1, id[0]); |
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668 stmnt.setString(2, uuid); |
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669 if (ttl == null) { |
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670 stmnt.setNull(3, Types.BIGINT); |
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671 } |
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672 else { |
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673 stmnt.setLong(3, ttl.longValue()); |
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674 } |
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675 |
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676 stmnt.setString(4, factory.getName()); |
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677 |
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678 stmnt.setBytes( |
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679 5, |
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680 factory.getSerializer().toBytes(artifact)); |
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681 |
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682 stmnt.execute(); |
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683 |
174
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684 conn.commit(); |
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685 return true; |
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686 } |
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687 }; |
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688 |
174
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689 if (!exec.runWrite()) { |
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690 throw new RuntimeException("failed insert artifact into database"); |
14
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691 } |
174
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692 |
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693 return id[0]; |
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694 } |
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695 |
90
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696 /** |
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697 * Touches the access timestamp of a given artifact to prevent |
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698 * that it will be removed from the database by the database cleaner. |
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699 * @param artifact The persistent wrapper around the living artifact. |
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700 */ |
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701 public void touch(final PersistentArtifact artifact) { |
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702 new SQLExecutor() { |
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703 public boolean doIt() throws SQLException { |
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704 prepareStatement(SQL_TOUCH); |
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705 stmnt.setInt(1, artifact.getId()); |
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706 stmnt.execute(); |
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707 conn.commit(); |
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708 return true; |
14
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709 } |
174
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710 }.runWrite(); |
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711 } |
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712 |
90
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|
713 /** |
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714 * Writes modification of an artifact back to the database. |
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715 * @param artifact The persistent wrapper around a living |
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716 * artifact. |
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717 */ |
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718 public void store(final PersistentArtifact artifact) { |
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719 new SQLExecutor() { |
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720 public boolean doIt() throws SQLException { |
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721 prepareStatement(SQL_UPDATE); |
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722 stmnt.setInt(2, artifact.getId()); |
26
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723 |
174
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724 byte [] bytes = artifact |
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725 .getSerializer() |
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726 .toBytes(artifact.getArtifact()); |
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727 |
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728 stmnt.setBytes(1, bytes); |
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729 stmnt.execute(); |
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730 conn.commit(); |
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731 return true; |
26
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732 } |
174
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733 }.runWrite(); |
14
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734 } |
133
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|
735 |
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736 public User createUser( |
174
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737 final String name, |
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738 final Document role, |
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739 final UserFactory factory, |
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740 final Object context |
133
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741 ) { |
174
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742 final User [] user = new User[1]; |
138
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743 |
174
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744 SQLExecutor exec = new SQLExecutor() { |
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745 public boolean doIt() throws SQLException { |
138
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746 |
174
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747 prepareStatement(SQL_USERS_NEXT_ID); |
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748 result = stmnt.executeQuery(); |
138
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749 |
146
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750 if (!result.next()) { |
174
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751 return false; |
138
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752 } |
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|
753 |
145
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Enable backend to delete users
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754 int id = result.getInt(1); |
138
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755 |
174
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756 reset(); |
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757 |
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758 String identifier = newIdentifier(); |
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759 |
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760 prepareStatement(SQL_USERS_INSERT); |
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761 |
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762 stmnt.setInt(1, id); |
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763 stmnt.setString(2, identifier); |
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764 stmnt.setString(3, name); |
138
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765 |
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766 byte [] roleData = role == null |
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767 ? null |
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768 : XMLUtils.toByteArray(role); |
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769 |
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770 if (roleData == null) { |
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771 stmnt.setNull(4, Types.BIGINT); |
138
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772 } |
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773 else { |
174
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774 stmnt.setBytes(4, roleData); |
138
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775 } |
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|
776 |
174
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777 stmnt.execute(); |
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778 conn.commit(); |
138
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|
779 |
174
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780 user[0] = factory.createUser( |
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781 identifier, name, role, context); |
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782 return true; |
138
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783 } |
174
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784 }; |
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785 |
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786 return exec.runWrite() ? user[0] : null; |
133
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|
787 } |
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|
788 |
174
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789 public boolean deleteUser(final String identifier) { |
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790 |
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791 if (!isValidIdentifier(identifier)) { |
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792 return false; |
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793 } |
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794 |
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795 SQLExecutor exec = new SQLExecutor() { |
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796 public boolean doIt() throws SQLException { |
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797 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
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798 |
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799 stmnt.setString(1, identifier); |
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800 result = stmnt.executeQuery(); |
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801 |
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802 if (!result.next()) { // No such user |
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803 return false; |
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804 } |
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805 |
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806 int id = result.getInt(1); |
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807 |
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808 reset(); |
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809 |
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810 // outdate the artifacts exclusively used by the user |
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811 |
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812 prepareStatement(SQL_OUTDATE_ARTIFACTS_USER); |
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813 stmnt.setInt(1, id); |
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814 stmnt.setInt(2, 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 collection items of the user |
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820 |
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821 prepareStatement(SQL_DELETE_USER_COLLECTION_ITEMS); |
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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 reset(); |
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826 |
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827 // delete the collections of the user |
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828 |
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829 prepareStatement(SQL_USERS_DELETE_COLLECTIONS); |
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830 stmnt.setInt(1, id); |
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831 stmnt.execute(); |
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832 |
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833 reset(); |
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834 |
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835 // delete the user |
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836 |
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837 prepareStatement(SQL_USERS_DELETE_ID); |
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838 stmnt.setInt(1, id); |
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839 stmnt.execute(); |
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840 |
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841 conn.commit(); |
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842 return true; |
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843 } |
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844 }; |
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845 |
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846 return exec.runWrite(); |
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847 } |
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848 |
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849 public User getUser( |
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850 final String identifier, |
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851 final UserFactory factory, |
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852 final Object context |
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853 ) { |
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854 if (!isValidIdentifier(identifier)) { |
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855 logger.debug("Invalid UUID: '" + identifier + "'"); |
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856 return null; |
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857 } |
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858 |
174
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859 final User [] user = new User[1]; |
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860 |
174
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861 SQLExecutor exec = new SQLExecutor() { |
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862 public boolean doIt() throws SQLException { |
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863 prepareStatement(SQL_USERS_SELECT_GID); |
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864 stmnt.setString(1, identifier); |
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865 result = stmnt.executeQuery(); |
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866 if (!result.next()) { // no such user |
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867 return false; |
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868 } |
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869 // omit id |
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870 String name = result.getString(2); |
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871 byte [] roleData = result.getBytes(3); |
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872 |
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873 Document role = XMLUtils.fromByteArray(roleData); |
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874 |
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875 user[0] = factory.createUser( |
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876 identifier, name, role, context); |
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877 return true; |
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878 } |
174
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879 }; |
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880 |
174
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881 return exec.runRead() ? user[0] : null; |
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882 } |
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883 |
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884 public User [] getUsers( |
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885 final UserFactory factory, |
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886 final Object context |
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887 ) { |
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888 final ArrayList<User> users = new ArrayList<User>(); |
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889 |
174
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890 SQLExecutor exec = new SQLExecutor() { |
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891 public boolean doIt() throws SQLException { |
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892 prepareStatement(SQL_USERS_SELECT_ALL); |
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893 result = stmnt.executeQuery(); |
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894 |
174
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895 while (result.next()) { |
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896 // omit id |
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897 String identifier = result.getString(2); |
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898 String name = result.getString(3); |
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899 byte [] roleData = result.getBytes(4); |
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900 |
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901 Document role = XMLUtils.fromByteArray(roleData); |
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902 User user = factory.createUser( |
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903 identifier, name, role, context); |
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904 users.add(user); |
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905 } |
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906 return true; |
148
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907 } |
174
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908 }; |
148
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909 |
174
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910 return exec.runRead() |
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911 ? users.toArray(new User[users.size()]) |
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912 : null; |
133
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Fixed typo in keys.
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128
diff
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|
913 } |
156
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|
914 |
159
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915 public ArtifactCollection createCollection( |
174
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916 final String ownerIdentifier, |
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917 final String name, |
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918 final ArtifactCollectionFactory factory, |
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919 final Document data, |
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920 final Object context |
159
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921 ) { |
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922 if (name == null) { |
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923 logger.debug("Name is null"); |
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924 return null; |
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|
925 } |
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|
926 |
177
77cd37a93fca
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927 if (!isValidIdentifier(ownerIdentifier)) { |
159
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928 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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929 return null; |
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|
930 } |
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|
931 |
174
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932 final ArtifactCollection [] collection = |
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933 new ArtifactCollection[1]; |
159
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934 |
174
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935 SQLExecutor exec = new SQLExecutor() { |
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936 public boolean doIt() throws SQLException { |
159
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937 // fetch owner id |
174
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938 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
159
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939 stmnt.setString(1, ownerIdentifier); |
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940 result = stmnt.executeQuery(); |
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941 |
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942 if (!result.next()) { // no such user |
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943 return false; |
159
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944 } |
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|
945 |
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946 int ownerId = result.getInt(1); |
174
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|
947 reset(); |
159
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|
948 |
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|
949 // fetch new collection seq number. |
174
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950 prepareStatement(SQL_COLLECTIONS_NEXT_ID); |
159
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951 result = stmnt.executeQuery(); |
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|
952 |
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953 if (!result.next()) { // no identifier generated |
174
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|
954 return false; |
159
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|
955 } |
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|
956 |
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|
957 int id = result.getInt(1); |
174
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958 reset(); |
159
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|
959 |
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|
960 String identifier = newIdentifier(); |
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|
961 |
174
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|
962 prepareStatement(SQL_COLLECTIONS_INSERT); |
159
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|
963 |
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|
964 stmnt.setInt(1, id); |
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|
965 stmnt.setString(2, identifier); |
161
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|
966 stmnt.setString(3, name); |
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967 stmnt.setInt(4, ownerId); |
159
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|
968 |
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969 // XXX: A bit odd: we don't have a collection, yet. |
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970 Long ttl = factory.timeToLiveUntouched(null, context); |
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|
971 |
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|
972 if (ttl == null) { |
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|
973 stmnt.setNull(5, Types.BIGINT); |
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|
974 } |
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|
975 else { |
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|
976 stmnt.setLong(5, ttl); |
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|
977 } |
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|
978 |
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|
979 stmnt.execute(); |
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|
980 conn.commit(); |
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|
981 |
174
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|
982 reset(); |
170
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|
983 |
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|
984 // fetch creation time from database |
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|
985 // done this way to use the time system |
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|
986 // of the database. |
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|
987 |
174
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|
988 prepareStatement(SQL_COLLECTIONS_CREATION_TIME); |
170
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989 stmnt.setInt(1, id); |
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|
990 |
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|
991 result = stmnt.executeQuery(); |
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|
992 |
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|
993 Date creationTime = null; |
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|
994 |
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|
995 if (result.next()) { |
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996 Timestamp timestamp = result.getTimestamp(1); |
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997 creationTime = new Date(timestamp.getTime()); |
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|
998 } |
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|
999 |
174
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1000 collection[0] = factory.createCollection( |
170
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1001 identifier, name, creationTime, data, context); |
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1002 |
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1003 return true; |
159
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|
1004 } |
174
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1005 }; |
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1006 |
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1007 return exec.runWrite() ? collection[0]: null; |
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1008 } |
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1009 |
164
268c2972d4a7
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|
1010 public ArtifactCollection [] listCollections( |
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1011 final String ownerIdentifier, |
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1012 final Document data, |
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1013 final ArtifactCollectionFactory collectionFactory, |
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1014 final UserFactory userFactory, |
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1015 final Object context |
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1016 ) { |
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1017 if (ownerIdentifier != null |
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1018 && !isValidIdentifier(ownerIdentifier)) { |
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1019 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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1020 return null; |
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1021 } |
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1022 |
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1023 final ArrayList<ArtifactCollection> collections = |
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1024 new ArrayList<ArtifactCollection>(); |
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1025 |
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1026 SQLExecutor exec = new SQLExecutor() { |
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1027 |
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1028 public boolean doIt() throws SQLException { |
167
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1029 |
174
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1030 if (ownerIdentifier != null) { |
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1031 prepareStatement(SQL_COLLECTIONS_SELECT_USER); |
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1032 stmnt.setString(1, ownerIdentifier); |
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1033 } |
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1034 else { |
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1035 prepareStatement(SQL_COLLECTIONS_SELECT_ALL); |
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1036 } |
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1037 |
174
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1038 result = stmnt.executeQuery(); |
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1039 |
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1040 while (result.next()) { |
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1041 String collectionIdentifier = result.getString(1); |
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1042 String collectionName = result.getString(2); |
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1043 Date creationTime = |
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1044 new Date(result.getTimestamp(3).getTime()); |
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1045 String userIdentifier = result.getString(4); |
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1046 |
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1047 ArtifactCollection collection = |
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1048 collectionFactory.createCollection( |
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1049 collectionIdentifier, |
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1050 collectionName, |
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1051 creationTime, |
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1052 data, |
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1053 context); |
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1054 |
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1055 if (userIdentifier != null) { |
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1056 collection.setUser(new LazyBackendUser( |
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1057 userIdentifier, userFactory, Backend.this, context)); |
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1058 } |
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1059 |
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1060 collections.add(collection); |
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1061 } |
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1062 return true; |
167
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1063 } |
174
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1064 }; |
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1065 |
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1066 return exec.runRead() |
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1067 ? collections.toArray(new ArtifactCollection[collections.size()]) |
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1068 : null; |
156
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1069 } |
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1070 |
174
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1071 |
175
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1072 public boolean deleteCollection(final String collectionId) { |
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1073 if (!isValidIdentifier(collectionId)) { |
175
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1074 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1075 return false; |
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1076 } |
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1077 SQLExecutor exec = new SQLExecutor() { |
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1078 public boolean doIt() throws SQLException { |
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1079 // fetch collection id |
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1080 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1081 stmnt.setString(1, collectionId); |
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1082 result = stmnt.executeQuery(); |
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1083 if (!result.next()) { |
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1084 logger.debug("No such collection: " + collectionId); |
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1085 return false; |
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1086 } |
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1087 int id = result.getInt(1); |
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1088 reset(); |
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1089 |
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1090 // outdate artifacts that are only in this collection |
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1091 prepareStatement(SQL_OUTDATE_ARTIFACTS_COLLECTION); |
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1092 stmnt.setInt(1, id); |
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1093 stmnt.setInt(2, id); |
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1094 stmnt.execute(); |
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1095 reset(); |
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1096 |
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1097 // delete the collection items |
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1098 prepareStatement(SQL_DELETE_COLLECTION_ITEMS); |
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1099 stmnt.setInt(1, id); |
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1100 stmnt.execute(); |
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1101 reset(); |
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1102 |
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1103 // delete the collection |
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1104 prepareStatement(SQL_DELETE_COLLECTION); |
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1105 stmnt.setInt(1, id); |
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1106 stmnt.execute(); |
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1107 conn.commit(); |
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1108 return true; |
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1109 } |
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1110 }; |
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1111 return exec.runWrite(); |
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1112 } |
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1113 |
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1114 public Document getCollectionAttribute( |
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1115 final String collectionId, |
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1116 final String artifactId |
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1117 ) { |
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1118 if (!isValidIdentifier(collectionId)) { |
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1119 logger.debug("collection id is not valid: " + collectionId); |
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1120 return null; |
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1121 } |
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1122 if (!isValidIdentifier(artifactId)) { |
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1123 logger.debug("artifact id is not valid: " + artifactId); |
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1124 } |
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1125 |
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1126 final Document [] document = new Document[1]; |
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1127 |
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1128 SQLExecutor exec = new SQLExecutor() { |
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1129 public boolean doIt() throws SQLException { |
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1130 prepareStatement(SQL_COLLECTION_ITEM_GET_ATTRIBUTE); |
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1131 stmnt.setString(1, collectionId); |
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1132 stmnt.setString(2, artifactId); |
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1133 result = stmnt.executeQuery(); |
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1134 if (!result.next()) { |
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1135 logger.debug("No such collection item"); |
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1136 return false; |
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1137 } |
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1138 document[0] = XMLUtils.fromByteArray(result.getBytes(1)); |
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1139 return true; |
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1140 } |
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1141 }; |
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1142 |
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1143 return exec.runRead() ? document[0] : null; |
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1144 } |
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1145 |
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1146 public boolean setCollectionAttribute( |
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1147 String collectionId, |
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1148 String artifactId, |
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1149 Document attribute |
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1150 ) { |
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1151 // TODO: Implement me! |
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1152 return false; |
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1153 } |
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1154 |
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1155 public boolean addCollectionArtifact( |
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1156 final String collectionId, |
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1157 final String artifactId, |
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1158 final Document attribute |
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1159 ) { |
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1160 if (!isValidIdentifier(collectionId)) { |
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1161 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1162 return false; |
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1163 } |
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1164 |
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1165 if (!isValidIdentifier(artifactId)) { |
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1166 logger.debug("Invalid artifact id: '" + artifactId + "'"); |
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1167 return false; |
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1168 } |
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1169 |
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1170 SQLExecutor exec = new SQLExecutor() { |
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1171 public boolean doIt() throws SQLException { |
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1172 // fetch artifact id |
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1173 prepareStatement(SQL_GET_ID); |
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1174 stmnt.setString(1, artifactId); |
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1175 result = stmnt.executeQuery(); |
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1176 if (!result.next()) { |
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1177 logger.debug("No such artifact: " + artifactId); |
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1178 return false; |
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1179 } |
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1180 int aid = result.getInt(1); |
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1181 reset(); |
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1182 |
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1183 // fetch collection id |
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1184 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1185 stmnt.setString(1, collectionId); |
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1186 result = stmnt.executeQuery(); |
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1187 if (!result.next()) { |
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1188 logger.debug("No such collection: " + collectionId); |
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1189 } |
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1190 int cid = result.getInt(1); |
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1191 reset(); |
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1192 |
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1193 // check if artifact is already in collection |
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1194 prepareStatement(SQL_COLLECTION_CHECK_ARTIFACT); |
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1195 stmnt.setInt(1, aid); |
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1196 stmnt.setInt(2, cid); |
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1197 result = stmnt.executeQuery(); |
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1198 if (result.next()) { |
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1199 logger.debug("artifact already in collection"); |
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1200 return false; |
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1201 } |
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1202 reset(); |
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1203 |
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1204 // fetch fresh id for new collection item |
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1205 prepareStatement(SQL_COLLECTION_ITEMS_ID_NEXTVAL); |
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1206 result = stmnt.executeQuery(); |
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1207 if (!result.next()) { |
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1208 logger.debug("no collection item id generated"); |
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1209 return false; |
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1210 } |
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1211 int ci_id = result.getInt(1); |
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1212 reset(); |
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1213 |
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1214 // insert new collection item |
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1215 prepareStatement(SQL_COLLECTION_ITEMS_INSERT); |
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1216 stmnt.setInt(1, ci_id); |
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1217 stmnt.setInt(2, cid); |
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1218 stmnt.setInt(3, aid); |
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1219 |
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1220 byte [] data = attribute != null |
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1221 ? XMLUtils.toByteArray(attribute) |
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1222 : null; |
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1223 |
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1224 if (data == null) { |
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1225 stmnt.setNull(4, Types.BINARY); |
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1226 } |
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1227 else { |
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1228 stmnt.setBytes(4, data); |
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1229 } |
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1230 stmnt.execute(); |
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1231 conn.commit(); |
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1232 |
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1233 return true; |
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1234 } |
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1235 }; |
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1236 return exec.runWrite(); |
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1237 } |
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1238 |
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1239 public boolean removeCollectionArtifact( |
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1240 String collectionId, |
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1241 String artifactId |
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1242 ) { |
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1243 // TODO: Implement me! |
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1244 return false; |
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1245 } |
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1246 |
157
6e6965873a48
Simplified creation of users.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1247 public ArtifactCollection [] listCollectionArtifacts(String collectionId) { |
156
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1248 // TODO: Implement me! |
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Added stubs for the collection handling in db backend.
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1249 return null; |
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1250 } |
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1251 |
13
0d6badf6af42
Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1252 } |
79
f69e5b87f05f
Implementation to export artifacts as xml (applied patch from issue208 by SLT).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1253 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |