Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java @ 179:644fd11ddd9f
Added code to set attribute of a collection item.
artifacts/trunk@1405 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 06 Mar 2011 10:55:37 +0000 |
parents | 535e4ea2ef9b |
children | 38fbbeffe8fe |
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 |
170
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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 |
179
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170 public static final String SQL_COLLECTION_ITEM_SET_ATTRIBUTE = |
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171 SQL.get("collection.item.set.attribute"); |
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172 |
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173 public static final String SQL_COLLECTIONS_TOUCH_BY_GID = |
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174 SQL.get("collections.touch.by,gid"); |
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175 |
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176 /** The singleton.*/ |
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177 protected static Backend instance; |
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178 |
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179 /** |
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180 * The database cleaner. Reference is stored here because |
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181 * the cleaner is woken up if the backend finds an outdated |
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182 * artifact. This artifact should be removed as soon as |
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183 * possible. |
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184 */ |
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185 protected DatabaseCleaner cleaner; |
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186 |
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187 /** |
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188 * To revive an artifact from the bytes coming from the database |
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189 * we need the artifact factory which references the artifact |
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190 * serializer which is able to do the reviving job. |
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191 */ |
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192 protected FactoryLookup factoryLookup; |
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193 |
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194 /** |
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195 * Little helper interface to decouple the ArtifactDatabase |
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196 * from the Backend. A ArtifactDatabase should depend on a |
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197 * Backend but a Backend not from an ArtifactDatabase. |
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198 */ |
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199 public interface FactoryLookup { |
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200 |
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201 /** |
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202 * Returns an ArtifactFactory which is bound to a given name. |
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203 * @param factoryName The name of the artifact factory. |
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204 * @return The ArtifactFactory bound to the factory name or |
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205 * null if not matching factory is found. |
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206 */ |
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207 ArtifactFactory getArtifactFactory(String factoryName); |
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208 |
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209 } // interface FactoryLookup |
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210 |
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211 /** |
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212 * Inner class that brigdes between the persisten form of the |
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213 * artifact and the living one inside the artifact database. |
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214 * After the describe(), feed(), advance() and out() operations |
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215 * of the artifact it must be possible to write to modified artifact |
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216 * back into the database. |
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217 */ |
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218 public final class PersistentArtifact |
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219 extends Id |
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220 { |
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221 private Artifact artifact; |
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222 private ArtifactSerializer serializer; |
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223 private Long ttl; |
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224 |
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225 /** |
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226 * Cronstructor to create a persistent artifact. |
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227 * @param artifact The living artifact. |
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228 * @param serializer The serializer to store the artifact |
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229 * after the operations. |
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230 * @param ttl The time to life of the artifact. |
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231 * @param id The database id of the artifact. |
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232 */ |
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233 public PersistentArtifact( |
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234 Artifact artifact, |
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235 ArtifactSerializer serializer, |
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236 Long ttl, |
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237 int id |
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238 ) { |
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239 super(id); |
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240 this.artifact = artifact; |
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241 this.serializer = serializer; |
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242 this.ttl = ttl; |
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243 } |
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244 |
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245 /** |
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246 * Returns the wrapped living artifact. |
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247 * @return the living artifact. |
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248 */ |
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249 public Artifact getArtifact() { |
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250 return artifact; |
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251 } |
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252 |
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253 /** |
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254 * Returns the serialized which is able to write a |
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255 * modified artifact back into the database. |
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256 * @return The serializer. |
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257 */ |
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258 public ArtifactSerializer getSerializer() { |
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259 return serializer; |
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260 } |
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261 |
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262 /** |
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263 * The time to life of the artifact. |
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264 * @return The time to live. |
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265 */ |
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266 public Long getTTL() { |
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267 return ttl; |
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268 } |
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269 |
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270 /** |
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271 * Stores the living artifact back into the database. |
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272 */ |
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273 public void store() { |
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274 if (logger.isDebugEnabled()) { |
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275 logger.debug("storing artifact id = " + getId()); |
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276 } |
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277 Backend.this.store(this); |
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278 } |
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279 |
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280 /** |
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281 * Only touches the access time of the artifact. |
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282 */ |
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283 public void touch() { |
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284 if (logger.isDebugEnabled()) { |
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285 logger.debug("touching artifact id = " + getId()); |
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286 } |
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287 Backend.this.touch(this); |
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288 } |
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289 } // class ArtifactWithId |
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290 |
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291 /** |
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292 * Default constructor |
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293 */ |
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294 public Backend() { |
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295 } |
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296 |
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297 /** |
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298 * Constructor to create a backend with a link to the database cleaner. |
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299 * @param cleaner The clean which periodically removes outdated |
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300 * artifacts from the database. |
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301 */ |
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302 public Backend(DatabaseCleaner cleaner) { |
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303 this.cleaner = cleaner; |
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304 } |
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305 |
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306 |
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307 /** |
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308 * Returns the singleton of this Backend. |
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309 * |
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310 * @return the backend. |
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311 */ |
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312 public static synchronized Backend getInstance() { |
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313 if (instance == null) { |
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314 instance = new Backend(); |
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315 } |
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316 |
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317 return instance; |
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318 } |
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319 |
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320 /** |
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321 * Sets the factory lookup mechanism to decouple ArtifactDatabase |
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322 * and Backend. |
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323 * @param factoryLookup |
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324 */ |
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325 public void setFactoryLookup(FactoryLookup factoryLookup) { |
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326 this.factoryLookup = factoryLookup; |
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327 } |
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328 |
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329 /** |
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330 * Sets the database cleaner explicitly. |
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331 * @param cleaner The database cleaner |
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332 */ |
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333 public void setCleaner(DatabaseCleaner cleaner) { |
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334 this.cleaner = cleaner; |
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335 } |
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336 |
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337 /** |
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338 * Returns a new unique identifier to external identify |
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339 * the artifact across the system. This implementation |
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340 * uses random UUIDs v4 to achieve this target. |
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341 * @return the new identifier |
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342 */ |
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343 public String newIdentifier() { |
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344 // TODO: check database for collisions. |
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345 return StringUtils.newUUID(); |
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346 } |
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347 |
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348 public boolean isValidIdentifier(String identifier) { |
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349 return StringUtils.checkUUID(identifier); |
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350 } |
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351 |
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352 /** |
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353 * Stores a new artifact into the database. |
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354 * @param artifact The artifact to be stored |
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355 * @param factory The factory which build the artifact |
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356 * @param ttl The initial time to life of the artifact. |
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357 * @return A persistent wrapper around the living |
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358 * artifact to be able to write modification later. |
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359 * @throws Exception Thrown if something went wrong with the |
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360 * storage process. |
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361 */ |
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362 public PersistentArtifact storeInitially( |
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363 Artifact artifact, |
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364 ArtifactFactory factory, |
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365 Long ttl |
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366 ) |
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367 throws Exception |
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368 { |
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369 return new PersistentArtifact( |
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370 artifact, |
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371 factory.getSerializer(), |
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372 ttl, |
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373 insertDatabase(artifact, factory, ttl)); |
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374 } |
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375 |
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376 /** |
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377 * Stores an artifact into database if it does not exist there. |
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378 * If it exists there it is only updated. |
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379 * @param artifact The artifact to store/update. |
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380 * @param factory The factory which created the artifact. |
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381 * @param ttl The initial time to live of the artifact. |
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382 * @return A persistent version of the artifact to be able |
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383 * to store a modification later. |
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384 * @throws Exception Thrown if something went wrong during |
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385 * storing/updating. |
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386 */ |
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387 public PersistentArtifact storeOrReplace( |
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388 Artifact artifact, |
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389 ArtifactFactory factory, |
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390 Long ttl |
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391 ) |
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392 throws Exception |
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393 { |
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394 return new PersistentArtifact( |
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395 artifact, |
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396 factory.getSerializer(), |
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397 ttl, |
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398 storeOrReplaceDatabase(artifact, factory, ttl)); |
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399 } |
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400 |
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401 /** |
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402 * Implementors of this interface are able to process the raw |
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403 * artifact data from the database for loading. |
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404 */ |
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405 public interface ArtifactLoader { |
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406 |
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407 /** |
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408 * Creates a custom object from the raw artifact database data. |
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409 * @param factory The factory that created this artifact. |
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410 * @param ttl The current time to life of the artifact. |
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411 * @param bytes The raw artifact bytes from the database. |
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412 * @param id The database id of the artifact. |
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413 * @return The custom object created by the implementation. |
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414 */ |
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415 Object load(ArtifactFactory factory, Long ttl, byte [] bytes, int id); |
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416 |
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417 } // interface ArtifactLoader |
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418 |
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419 /** |
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420 * Fetches an artifact from the database identified by the |
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421 * given identifier. |
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422 * @param identifer The identifier of the artifact. |
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423 * @return A persistent wrapper around the found artifact |
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424 * to be able to write back a modifaction later or null |
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425 * if no artifact is found for this identifier. |
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426 */ |
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427 public PersistentArtifact getArtifact(String identifer) { |
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428 |
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429 return (PersistentArtifact)loadArtifact( |
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430 identifer, |
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431 new ArtifactLoader() { |
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432 |
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433 public Object load( |
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434 ArtifactFactory factory, |
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435 Long ttl, |
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436 byte [] bytes, |
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437 int id |
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438 ) { |
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439 ArtifactSerializer serializer = factory.getSerializer(); |
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440 |
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441 Artifact artifact = serializer.fromBytes(bytes); |
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442 |
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443 return artifact == null |
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444 ? null |
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445 : new PersistentArtifact(artifact, serializer, ttl, id); |
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446 } |
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447 }); |
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448 } |
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449 |
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450 /** |
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451 * More general loading mechanism for artifacts. The concrete |
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452 * load processing is delegated to the given loader. |
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453 * @param identifer The identifier of the artifact. |
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454 * @param loader The loader which processes the raw database data. |
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455 * @return The object created by the loader. |
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456 */ |
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457 public Object loadArtifact( |
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458 final String identifer, |
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459 final ArtifactLoader loader |
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460 ) { |
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461 if (!isValidIdentifier(identifer)) { |
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462 return null; |
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463 } |
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464 |
174
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465 final Object [] loaded = new Object[1]; |
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466 |
174
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467 SQLExecutor exec = new SQLExecutor() { |
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468 public boolean doIt() throws SQLException { |
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469 prepareStatement(SQL_LOAD_BY_GID); |
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470 stmnt.setString(1, identifer); |
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471 |
174
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472 result = stmnt.executeQuery(); |
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473 |
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474 if (!result.next()) { |
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475 return false; |
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476 } |
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477 |
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478 int id = result.getInt(1); |
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479 long ttlX = result.getLong(3); |
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480 |
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481 Long ttl = result.wasNull() ? null : Long.valueOf(ttlX); |
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482 |
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483 if (ttl != null) { // real time to life |
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484 long last_access = result.getTimestamp(2).getTime(); |
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485 if (last_access + ttlX < System.currentTimeMillis()) { |
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486 artifactOutdated(id); |
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487 return false; |
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488 } |
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489 } |
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490 |
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491 String factoryName = result.getString(4); |
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492 |
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493 if (factoryLookup == null) { |
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494 logger.error("factory lookup == null"); |
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495 return false; |
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496 } |
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497 |
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498 ArtifactFactory factory = factoryLookup |
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499 .getArtifactFactory(factoryName); |
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500 |
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501 if (factory == null) { |
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502 logger.error("factory '" + factoryName + "' not found"); |
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503 return false; |
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504 } |
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505 |
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506 byte [] bytes = result.getBytes(5); |
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507 |
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508 loaded[0] = loader.load(factory, ttl, bytes, id); |
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509 return true; |
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510 } |
174
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511 }; |
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512 |
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513 return exec.runRead() ? loaded[0] : null; |
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514 } |
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515 |
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516 /** |
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517 * Called if the load mechanism found an outdated artifact. |
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518 * It wakes up the database cleaner. |
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519 * @param id The id of the outdated artifact. |
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520 */ |
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521 protected void artifactOutdated(int id) { |
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522 if (logger.isDebugEnabled()) { |
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523 logger.info("artifactOutdated: id = " + id); |
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524 } |
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525 if (cleaner != null) { |
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526 cleaner.wakeup(); |
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527 } |
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528 } |
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529 |
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530 public Artifact reviveArtifact(String factoryName, byte [] bytes) { |
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531 if (factoryLookup == null) { |
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532 logger.error("reviveArtifact: factory lookup == null"); |
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533 return null; |
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534 } |
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535 ArtifactFactory factory = factoryLookup |
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536 .getArtifactFactory(factoryName); |
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537 |
41
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538 if (factory == null) { |
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539 logger.error( |
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540 "reviveArtifact: no factory '" + factoryName + "' found"); |
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541 return null; |
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542 } |
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543 |
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544 ArtifactSerializer serializer = factory.getSerializer(); |
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545 |
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546 return serializer.fromBytes(bytes); |
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547 } |
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548 |
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549 /** |
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550 * Internal method to store/replace an artifact inside the database. |
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551 * If an artifact with the given identifier does not exists it is |
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552 * created else only the content data is updated. |
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553 * @param artifact The artifact to be store/update inside the database. |
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554 * @param factory The factory that created the artifact. |
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555 * @param ttl The initial time to life of the artifact. |
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556 * @return The database id of the stored/updated artifact. |
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557 */ |
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558 protected int storeOrReplaceDatabase( |
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559 final Artifact artifact, |
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560 final ArtifactFactory factory, |
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561 final Long ttl |
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562 ) { |
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563 final String uuid = artifact.identifier(); |
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|
564 |
177
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565 if (!isValidIdentifier(uuid)) { |
80
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|
566 throw new RuntimeException("No valid UUID"); |
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567 } |
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|
568 |
174
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569 final int [] id = new int[1]; |
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570 |
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571 SQLExecutor exec = new SQLExecutor() { |
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572 public boolean doIt() throws SQLException { |
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573 |
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574 prepareStatement(SQL_GET_ID); |
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575 stmnt.setString(1, uuid); |
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576 result = stmnt.executeQuery(); |
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577 |
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578 Integer ID = result.next() |
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579 ? Integer.valueOf(result.getInt(1)) |
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580 : null; |
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581 |
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582 reset(); |
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583 |
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584 if (ID != null) { // already in database |
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585 prepareStatement(SQL_REPLACE); |
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586 |
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587 if (ttl == null) { |
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588 stmnt.setNull(1, Types.BIGINT); |
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589 } |
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590 else { |
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591 stmnt.setLong(1, ttl.longValue()); |
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592 } |
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593 |
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594 stmnt.setString(2, factory.getName()); |
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595 stmnt.setBytes( |
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596 3, |
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597 factory.getSerializer().toBytes(artifact)); |
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598 id[0] = ID.intValue(); |
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599 stmnt.setInt(4, id[0]); |
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600 } |
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601 else { // new artifact |
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602 prepareStatement(SQL_NEXT_ID); |
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603 result = stmnt.executeQuery(); |
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604 |
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605 if (!result.next()) { |
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606 logger.error("No id generated"); |
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607 return false; |
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608 } |
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609 |
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610 reset(); |
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611 |
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612 prepareStatement(SQL_INSERT); |
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613 |
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614 id[0] = result.getInt(1); |
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615 stmnt.setInt(1, id[0]); |
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616 stmnt.setString(2, uuid); |
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617 if (ttl == null) { |
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618 stmnt.setNull(3, Types.BIGINT); |
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619 } |
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620 else { |
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621 stmnt.setLong(3, ttl.longValue()); |
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622 } |
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623 |
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624 stmnt.setString(4, factory.getName()); |
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625 |
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626 stmnt.setBytes( |
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627 5, |
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628 factory.getSerializer().toBytes(artifact)); |
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629 } |
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630 stmnt.execute(); |
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631 conn.commit(); |
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632 return true; |
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633 } |
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634 }; |
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635 |
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636 if (!exec.runWrite()) { |
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637 throw new RuntimeException("failed insert artifact into database"); |
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638 } |
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639 |
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640 return id[0]; |
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641 } |
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642 |
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643 /** |
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644 * Internal method to store an artifact inside the database. |
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645 * @param artifact The artifact to be stored. |
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646 * @param factory The factory which created the artifact. |
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647 * @param ttl The initial time to live of the artifact. |
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648 * @return The database id of the stored artifact. |
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649 */ |
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650 protected int insertDatabase( |
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651 final Artifact artifact, |
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652 final ArtifactFactory factory, |
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653 final Long ttl |
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654 ) { |
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655 final int [] id = new int[1]; |
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656 |
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657 SQLExecutor exec = new SQLExecutor() { |
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658 public boolean doIt() throws SQLException { |
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659 prepareStatement(SQL_NEXT_ID); |
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660 result = stmnt.executeQuery(); |
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661 |
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662 if (!result.next()) { |
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663 logger.error("No id generated"); |
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664 return false; |
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665 } |
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666 |
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667 id[0] = result.getInt(1); |
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668 |
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669 reset(); |
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670 prepareStatement(SQL_INSERT); |
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671 |
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672 String uuid = artifact.identifier(); |
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673 stmnt.setInt(1, id[0]); |
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674 stmnt.setString(2, uuid); |
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675 if (ttl == null) { |
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676 stmnt.setNull(3, Types.BIGINT); |
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677 } |
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678 else { |
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679 stmnt.setLong(3, ttl.longValue()); |
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680 } |
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681 |
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682 stmnt.setString(4, factory.getName()); |
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683 |
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|
684 stmnt.setBytes( |
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685 5, |
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686 factory.getSerializer().toBytes(artifact)); |
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687 |
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688 stmnt.execute(); |
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689 |
174
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690 conn.commit(); |
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691 return true; |
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692 } |
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693 }; |
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694 |
174
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695 if (!exec.runWrite()) { |
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696 throw new RuntimeException("failed insert artifact into database"); |
14
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697 } |
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698 |
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699 return id[0]; |
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700 } |
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701 |
90
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702 /** |
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703 * Touches the access timestamp of a given artifact to prevent |
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704 * that it will be removed from the database by the database cleaner. |
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705 * @param artifact The persistent wrapper around the living artifact. |
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706 */ |
174
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707 public void touch(final PersistentArtifact artifact) { |
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708 new SQLExecutor() { |
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709 public boolean doIt() throws SQLException { |
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710 prepareStatement(SQL_TOUCH); |
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711 stmnt.setInt(1, artifact.getId()); |
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712 stmnt.execute(); |
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713 conn.commit(); |
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714 return true; |
14
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715 } |
174
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716 }.runWrite(); |
14
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|
717 } |
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diff
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|
718 |
90
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|
719 /** |
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720 * Writes modification of an artifact back to the database. |
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721 * @param artifact The persistent wrapper around a living |
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722 * artifact. |
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|
723 */ |
174
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724 public void store(final PersistentArtifact artifact) { |
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Reduce the code repetition and the complexity of the backend.
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725 new SQLExecutor() { |
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726 public boolean doIt() throws SQLException { |
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727 prepareStatement(SQL_UPDATE); |
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728 stmnt.setInt(2, artifact.getId()); |
26
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Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
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|
729 |
174
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730 byte [] bytes = artifact |
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731 .getSerializer() |
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732 .toBytes(artifact.getArtifact()); |
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|
733 |
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734 stmnt.setBytes(1, bytes); |
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735 stmnt.execute(); |
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736 conn.commit(); |
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737 return true; |
26
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|
738 } |
174
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|
739 }.runWrite(); |
14
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|
740 } |
133
2950c6011afa
Fixed typo in keys.
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diff
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|
741 |
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|
742 public User createUser( |
174
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743 final String name, |
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744 final Document role, |
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745 final UserFactory factory, |
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746 final Object context |
133
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|
747 ) { |
174
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748 final User [] user = new User[1]; |
138
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749 |
174
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|
750 SQLExecutor exec = new SQLExecutor() { |
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751 public boolean doIt() throws SQLException { |
138
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752 |
174
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|
753 prepareStatement(SQL_USERS_NEXT_ID); |
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|
754 result = stmnt.executeQuery(); |
138
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755 |
146
967dc552455d
Enable backend to delete users
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|
756 if (!result.next()) { |
174
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|
757 return false; |
138
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|
758 } |
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Call database to create a new user.
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|
759 |
145
c0d025df722d
Enable backend to delete users
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|
760 int id = result.getInt(1); |
138
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|
761 |
174
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|
762 reset(); |
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763 |
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|
764 String identifier = newIdentifier(); |
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765 |
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|
766 prepareStatement(SQL_USERS_INSERT); |
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767 |
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|
768 stmnt.setInt(1, id); |
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|
769 stmnt.setString(2, identifier); |
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|
770 stmnt.setString(3, name); |
138
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|
771 |
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|
772 byte [] roleData = role == null |
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|
773 ? null |
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774 : XMLUtils.toByteArray(role); |
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|
775 |
b90e831d3dfe
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|
776 if (roleData == null) { |
174
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|
777 stmnt.setNull(4, Types.BIGINT); |
138
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|
778 } |
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|
779 else { |
174
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780 stmnt.setBytes(4, roleData); |
138
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781 } |
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|
782 |
174
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783 stmnt.execute(); |
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|
784 conn.commit(); |
138
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|
785 |
174
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|
786 user[0] = factory.createUser( |
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|
787 identifier, name, role, context); |
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788 return true; |
138
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789 } |
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790 }; |
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791 |
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792 return exec.runWrite() ? user[0] : null; |
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793 } |
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794 |
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795 public boolean deleteUser(final String identifier) { |
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796 |
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797 if (!isValidIdentifier(identifier)) { |
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798 return false; |
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799 } |
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800 |
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801 SQLExecutor exec = new SQLExecutor() { |
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802 public boolean doIt() throws SQLException { |
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803 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
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804 |
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805 stmnt.setString(1, identifier); |
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806 result = stmnt.executeQuery(); |
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807 |
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808 if (!result.next()) { // No such user |
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809 return false; |
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810 } |
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811 |
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812 int id = result.getInt(1); |
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813 |
174
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814 reset(); |
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815 |
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816 // outdate the artifacts exclusively used by the user |
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817 |
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818 prepareStatement(SQL_OUTDATE_ARTIFACTS_USER); |
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819 stmnt.setInt(1, id); |
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820 stmnt.setInt(2, id); |
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821 stmnt.execute(); |
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822 |
174
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823 reset(); |
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824 |
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825 // delete the collection items of the user |
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826 |
174
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827 prepareStatement(SQL_DELETE_USER_COLLECTION_ITEMS); |
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828 stmnt.setInt(1, id); |
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829 stmnt.execute(); |
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830 |
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831 reset(); |
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832 |
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833 // delete the collections of the user |
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834 |
174
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835 prepareStatement(SQL_USERS_DELETE_COLLECTIONS); |
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836 stmnt.setInt(1, id); |
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837 stmnt.execute(); |
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838 |
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839 reset(); |
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840 |
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841 // delete the user |
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842 |
174
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843 prepareStatement(SQL_USERS_DELETE_ID); |
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844 stmnt.setInt(1, id); |
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845 stmnt.execute(); |
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846 |
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847 conn.commit(); |
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848 return true; |
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849 } |
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850 }; |
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851 |
174
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852 return exec.runWrite(); |
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853 } |
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854 |
157
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855 public User getUser( |
174
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856 final String identifier, |
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857 final UserFactory factory, |
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858 final Object context |
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859 ) { |
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860 if (!isValidIdentifier(identifier)) { |
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861 logger.debug("Invalid UUID: '" + identifier + "'"); |
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862 return null; |
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863 } |
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864 |
174
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865 final User [] user = new User[1]; |
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866 |
174
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867 SQLExecutor exec = new SQLExecutor() { |
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868 public boolean doIt() throws SQLException { |
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869 prepareStatement(SQL_USERS_SELECT_GID); |
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870 stmnt.setString(1, identifier); |
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871 result = stmnt.executeQuery(); |
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872 if (!result.next()) { // no such user |
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873 return false; |
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874 } |
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875 // omit id |
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876 String name = result.getString(2); |
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877 byte [] roleData = result.getBytes(3); |
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878 |
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879 Document role = XMLUtils.fromByteArray(roleData); |
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880 |
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881 user[0] = factory.createUser( |
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882 identifier, name, role, context); |
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883 return true; |
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884 } |
174
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885 }; |
147
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886 |
174
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887 return exec.runRead() ? user[0] : null; |
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888 } |
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889 |
174
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890 public User [] getUsers( |
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891 final UserFactory factory, |
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892 final Object context |
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893 ) { |
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894 final ArrayList<User> users = new ArrayList<User>(); |
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895 |
174
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896 SQLExecutor exec = new SQLExecutor() { |
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897 public boolean doIt() throws SQLException { |
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898 prepareStatement(SQL_USERS_SELECT_ALL); |
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899 result = stmnt.executeQuery(); |
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900 |
174
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901 while (result.next()) { |
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902 // omit id |
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903 String identifier = result.getString(2); |
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904 String name = result.getString(3); |
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905 byte [] roleData = result.getBytes(4); |
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|
906 |
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|
907 Document role = XMLUtils.fromByteArray(roleData); |
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908 User user = factory.createUser( |
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|
909 identifier, name, role, context); |
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910 users.add(user); |
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911 } |
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|
912 return true; |
148
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|
913 } |
174
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|
914 }; |
148
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|
915 |
174
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|
916 return exec.runRead() |
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|
917 ? users.toArray(new User[users.size()]) |
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918 : null; |
133
2950c6011afa
Fixed typo in keys.
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128
diff
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|
919 } |
156
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|
920 |
159
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|
921 public ArtifactCollection createCollection( |
174
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922 final String ownerIdentifier, |
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923 final String name, |
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924 final ArtifactCollectionFactory factory, |
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925 final Document data, |
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926 final Object context |
159
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|
927 ) { |
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|
928 if (name == null) { |
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|
929 logger.debug("Name is null"); |
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|
930 return null; |
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|
931 } |
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|
932 |
177
77cd37a93fca
Backend: isIdentifierValid more symmetric to new newIndentifier
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diff
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|
933 if (!isValidIdentifier(ownerIdentifier)) { |
159
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|
934 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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|
935 return null; |
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|
936 } |
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|
937 |
174
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|
938 final ArtifactCollection [] collection = |
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939 new ArtifactCollection[1]; |
159
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|
940 |
174
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|
941 SQLExecutor exec = new SQLExecutor() { |
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|
942 public boolean doIt() throws SQLException { |
159
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|
943 // fetch owner id |
174
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|
944 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
159
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|
945 stmnt.setString(1, ownerIdentifier); |
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|
946 result = stmnt.executeQuery(); |
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|
947 |
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|
948 if (!result.next()) { // no such user |
174
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|
949 return false; |
159
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|
950 } |
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|
951 |
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|
952 int ownerId = result.getInt(1); |
174
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|
953 reset(); |
159
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|
954 |
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|
955 // fetch new collection seq number. |
174
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|
956 prepareStatement(SQL_COLLECTIONS_NEXT_ID); |
159
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|
957 result = stmnt.executeQuery(); |
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|
958 |
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|
959 if (!result.next()) { // no identifier generated |
174
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|
960 return false; |
159
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|
961 } |
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|
962 |
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|
963 int id = result.getInt(1); |
174
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|
964 reset(); |
159
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|
965 |
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|
966 String identifier = newIdentifier(); |
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|
967 |
174
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|
968 prepareStatement(SQL_COLLECTIONS_INSERT); |
159
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|
969 |
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|
970 stmnt.setInt(1, id); |
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|
971 stmnt.setString(2, identifier); |
161
e4a1562dfc21
Bugfixed the collection creation in the Backend.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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diff
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|
972 stmnt.setString(3, name); |
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|
973 stmnt.setInt(4, ownerId); |
159
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|
974 |
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|
975 // XXX: A bit odd: we don't have a collection, yet. |
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|
976 Long ttl = factory.timeToLiveUntouched(null, context); |
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|
977 |
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|
978 if (ttl == null) { |
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|
979 stmnt.setNull(5, Types.BIGINT); |
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|
980 } |
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|
981 else { |
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|
982 stmnt.setLong(5, ttl); |
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|
983 } |
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|
984 |
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|
985 stmnt.execute(); |
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|
986 conn.commit(); |
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|
987 |
174
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|
988 reset(); |
170
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|
989 |
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|
990 // fetch creation time from database |
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|
991 // done this way to use the time system |
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|
992 // of the database. |
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|
993 |
174
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|
994 prepareStatement(SQL_COLLECTIONS_CREATION_TIME); |
170
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|
995 stmnt.setInt(1, id); |
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|
996 |
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|
997 result = stmnt.executeQuery(); |
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|
998 |
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|
999 Date creationTime = null; |
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|
1000 |
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|
1001 if (result.next()) { |
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|
1002 Timestamp timestamp = result.getTimestamp(1); |
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|
1003 creationTime = new Date(timestamp.getTime()); |
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|
1004 } |
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|
1005 |
174
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|
1006 collection[0] = factory.createCollection( |
170
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|
1007 identifier, name, creationTime, data, context); |
174
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|
1008 |
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|
1009 return true; |
159
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|
1010 } |
174
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|
1011 }; |
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|
1012 |
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|
1013 return exec.runWrite() ? collection[0]: null; |
156
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1014 } |
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1015 |
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1016 public ArtifactCollection [] listCollections( |
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1017 final String ownerIdentifier, |
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1018 final Document data, |
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1019 final ArtifactCollectionFactory collectionFactory, |
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1020 final UserFactory userFactory, |
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1021 final Object context |
167
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1022 ) { |
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1023 if (ownerIdentifier != null |
177
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1024 && !isValidIdentifier(ownerIdentifier)) { |
167
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1025 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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1026 return null; |
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1027 } |
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1028 |
174
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1029 final ArrayList<ArtifactCollection> collections = |
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1030 new ArrayList<ArtifactCollection>(); |
167
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1031 |
174
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1032 SQLExecutor exec = new SQLExecutor() { |
167
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1033 |
174
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1034 public boolean doIt() throws SQLException { |
167
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1035 |
174
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1036 if (ownerIdentifier != null) { |
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1037 prepareStatement(SQL_COLLECTIONS_SELECT_USER); |
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1038 stmnt.setString(1, ownerIdentifier); |
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1039 } |
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1040 else { |
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1041 prepareStatement(SQL_COLLECTIONS_SELECT_ALL); |
167
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1042 } |
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1043 |
174
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1044 result = stmnt.executeQuery(); |
167
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1045 |
174
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1046 while (result.next()) { |
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1047 String collectionIdentifier = result.getString(1); |
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1048 String collectionName = result.getString(2); |
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1049 Date creationTime = |
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1050 new Date(result.getTimestamp(3).getTime()); |
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1051 String userIdentifier = result.getString(4); |
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1052 |
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1053 ArtifactCollection collection = |
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1054 collectionFactory.createCollection( |
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1055 collectionIdentifier, |
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1056 collectionName, |
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1057 creationTime, |
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1058 data, |
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1059 context); |
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1060 |
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1061 if (userIdentifier != null) { |
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1062 collection.setUser(new LazyBackendUser( |
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|
1063 userIdentifier, userFactory, Backend.this, context)); |
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1064 } |
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1065 |
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1066 collections.add(collection); |
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1067 } |
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1068 return true; |
167
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1069 } |
174
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1070 }; |
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1071 |
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1072 return exec.runRead() |
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1073 ? collections.toArray(new ArtifactCollection[collections.size()]) |
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1074 : null; |
156
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1075 } |
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1076 |
174
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1077 |
175
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1078 public boolean deleteCollection(final String collectionId) { |
177
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1079 if (!isValidIdentifier(collectionId)) { |
175
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1080 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1081 return false; |
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1082 } |
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1083 SQLExecutor exec = new SQLExecutor() { |
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1084 public boolean doIt() throws SQLException { |
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1085 // fetch collection id |
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1086 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1087 stmnt.setString(1, collectionId); |
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1088 result = stmnt.executeQuery(); |
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1089 if (!result.next()) { |
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1090 logger.debug("No such collection: " + collectionId); |
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1091 return false; |
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1092 } |
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1093 int id = result.getInt(1); |
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1094 reset(); |
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1095 |
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1096 // outdate artifacts that are only in this collection |
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1097 prepareStatement(SQL_OUTDATE_ARTIFACTS_COLLECTION); |
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1098 stmnt.setInt(1, id); |
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1099 stmnt.setInt(2, 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 items |
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1104 prepareStatement(SQL_DELETE_COLLECTION_ITEMS); |
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1105 stmnt.setInt(1, id); |
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1106 stmnt.execute(); |
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1107 reset(); |
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1108 |
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1109 // delete the collection |
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1110 prepareStatement(SQL_DELETE_COLLECTION); |
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1111 stmnt.setInt(1, id); |
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1112 stmnt.execute(); |
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1113 conn.commit(); |
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1114 return true; |
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1115 } |
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1116 }; |
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1117 return exec.runWrite(); |
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1118 } |
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1119 |
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1120 public Document getCollectionAttribute( |
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1121 final String collectionId, |
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1122 final String artifactId |
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1123 ) { |
178
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1124 if (!isValidIdentifier(collectionId)) { |
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1125 logger.debug("collection id is not valid: " + collectionId); |
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1126 return null; |
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1127 } |
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1128 if (!isValidIdentifier(artifactId)) { |
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1129 logger.debug("artifact id is not valid: " + artifactId); |
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1130 return null; |
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1131 } |
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1132 |
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1133 final Document [] document = new Document[1]; |
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1134 |
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1135 SQLExecutor exec = new SQLExecutor() { |
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1136 public boolean doIt() throws SQLException { |
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1137 prepareStatement(SQL_COLLECTION_ITEM_GET_ATTRIBUTE); |
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1138 stmnt.setString(1, collectionId); |
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1139 stmnt.setString(2, artifactId); |
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1140 result = stmnt.executeQuery(); |
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1141 if (!result.next()) { |
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1142 logger.debug("No such collection item"); |
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1143 return false; |
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1144 } |
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1145 document[0] = XMLUtils.fromByteArray(result.getBytes(1)); |
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1146 return true; |
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1147 } |
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1148 }; |
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1149 |
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1150 return exec.runRead() ? document[0] : null; |
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1151 } |
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1152 |
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1153 public boolean setCollectionAttribute( |
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1154 final String collectionId, |
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1155 final String artifactId, |
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1156 Document attribute |
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1157 ) { |
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1158 if (!isValidIdentifier(collectionId)) { |
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1159 logger.debug("collection id is not valid: " + collectionId); |
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1160 return false; |
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1161 } |
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1162 if (!isValidIdentifier(artifactId)) { |
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1163 logger.debug("artifact id is not valid: " + artifactId); |
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1164 return false; |
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1165 } |
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1166 |
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1167 final byte [] data = XMLUtils.toByteArray(attribute); |
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1168 |
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1169 return new SQLExecutor() { |
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1170 public boolean doIt() throws SQLException { |
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1171 |
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1172 // set the column in collection items |
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1173 prepareStatement(SQL_COLLECTION_ITEM_SET_ATTRIBUTE); |
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1174 if (data == null) { |
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1175 stmnt.setNull(1, Types.BINARY); |
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1176 } |
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1177 else { |
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1178 stmnt.setBytes(1, data); |
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1179 } |
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1180 stmnt.setString(2, collectionId); |
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1181 stmnt.setString(3, artifactId); |
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1182 stmnt.execute(); |
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1183 reset(); |
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1184 |
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1185 // touch the collection |
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1186 prepareStatement(SQL_COLLECTIONS_TOUCH_BY_GID); |
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1187 stmnt.setString(1, collectionId); |
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1188 stmnt.execute(); |
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1189 |
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1190 conn.commit(); |
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1191 return true; |
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1192 } |
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1193 }.runWrite(); |
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1194 } |
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1195 |
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1196 public boolean addCollectionArtifact( |
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1197 final String collectionId, |
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1198 final String artifactId, |
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1199 final Document attribute |
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1200 ) { |
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1201 if (!isValidIdentifier(collectionId)) { |
176
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1202 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1203 return false; |
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1204 } |
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1205 |
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1206 if (!isValidIdentifier(artifactId)) { |
176
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1207 logger.debug("Invalid artifact id: '" + artifactId + "'"); |
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1208 return false; |
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1209 } |
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1210 |
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1211 SQLExecutor exec = new SQLExecutor() { |
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1212 public boolean doIt() throws SQLException { |
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1213 // fetch artifact id |
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1214 prepareStatement(SQL_GET_ID); |
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1215 stmnt.setString(1, artifactId); |
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1216 result = stmnt.executeQuery(); |
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1217 if (!result.next()) { |
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1218 logger.debug("No such artifact: " + artifactId); |
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1219 return false; |
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1220 } |
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1221 int aid = result.getInt(1); |
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1222 reset(); |
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1223 |
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1224 // fetch collection id |
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1225 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1226 stmnt.setString(1, collectionId); |
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1227 result = stmnt.executeQuery(); |
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1228 if (!result.next()) { |
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1229 logger.debug("No such collection: " + collectionId); |
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1230 } |
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1231 int cid = result.getInt(1); |
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1232 reset(); |
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1233 |
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1234 // check if artifact is already in collection |
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1235 prepareStatement(SQL_COLLECTION_CHECK_ARTIFACT); |
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1236 stmnt.setInt(1, aid); |
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1237 stmnt.setInt(2, cid); |
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1238 result = stmnt.executeQuery(); |
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1239 if (result.next()) { |
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1240 logger.debug("artifact already in collection"); |
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1241 return false; |
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1242 } |
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1243 reset(); |
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1244 |
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1245 // fetch fresh id for new collection item |
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1246 prepareStatement(SQL_COLLECTION_ITEMS_ID_NEXTVAL); |
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1247 result = stmnt.executeQuery(); |
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1248 if (!result.next()) { |
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1249 logger.debug("no collection item id generated"); |
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1250 return false; |
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1251 } |
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1252 int ci_id = result.getInt(1); |
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1253 reset(); |
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1254 |
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1255 // insert new collection item |
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1256 prepareStatement(SQL_COLLECTION_ITEMS_INSERT); |
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1257 stmnt.setInt(1, ci_id); |
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1258 stmnt.setInt(2, cid); |
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1259 stmnt.setInt(3, aid); |
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1260 |
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1261 byte [] data = attribute != null |
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1262 ? XMLUtils.toByteArray(attribute) |
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1263 : null; |
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1264 |
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1265 if (data == null) { |
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1266 stmnt.setNull(4, Types.BINARY); |
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1267 } |
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1268 else { |
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1269 stmnt.setBytes(4, data); |
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1270 } |
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1271 stmnt.execute(); |
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1272 conn.commit(); |
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1273 |
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1274 return true; |
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1275 } |
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1276 }; |
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1277 return exec.runWrite(); |
156
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1278 } |
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1279 |
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1280 public boolean removeCollectionArtifact( |
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1281 String collectionId, |
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1282 String artifactId |
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1283 ) { |
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1284 // TODO: Implement me! |
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1285 return false; |
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1286 } |
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1287 |
157
6e6965873a48
Simplified creation of users.
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1288 public ArtifactCollection [] listCollectionArtifacts(String collectionId) { |
156
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1289 // TODO: Implement me! |
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1290 return null; |
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1291 } |
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1292 |
13
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Added not yet working backend to artifact database.
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1293 } |
79
f69e5b87f05f
Implementation to export artifacts as xml (applied patch from issue208 by SLT).
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1294 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |