Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java @ 215:a9c8fa38ba03
Added new collection specific sql statements.
artifacts/trunk@1554 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 24 Mar 2011 11:28:26 +0000 |
parents | 33f58a847fc4 |
children | 87a7773030b5 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2010, 2011 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 package de.intevation.artifactdatabase; |
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9 |
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10 import de.intevation.artifacts.Artifact; |
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11 import de.intevation.artifacts.ArtifactCollection; |
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12 import de.intevation.artifacts.ArtifactCollectionFactory; |
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13 import de.intevation.artifacts.ArtifactFactory; |
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14 import de.intevation.artifacts.ArtifactSerializer; |
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15 import de.intevation.artifacts.CollectionItem; |
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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 |
144
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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 |
159
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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 |
175
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149 public static final String SQL_COLLECTIONS_ID_BY_GID = |
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150 SQL.get("collections.id.by.gid"); |
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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.items.id.nextval"); |
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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 = |
180
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174 SQL.get("collections.touch.by.gid"); |
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175 |
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176 public static final String SQL_COLLECTION_ITEM_ID_CID_AID = |
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177 SQL.get("collection.item.id.cid.aid"); |
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178 |
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179 public static final String SQL_COLLECTION_ITEM_OUTDATE_ARTIFACT = |
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180 SQL.get("collection.item.outdate.artifact"); |
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181 |
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182 public static final String SQL_COLLECTION_ITEM_DELETE = |
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183 SQL.get("collection.item.delete"); |
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184 |
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185 public static final String SQL_COLLECTIONS_TOUCH_BY_ID = |
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186 SQL.get("collections.touch.by.id"); |
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187 |
184
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188 public static final String SQL_COLLECTION_ITEMS_LIST_GID = |
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189 SQL.get("collection.items.list.gid"); |
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190 |
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191 /** The singleton.*/ |
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192 protected static Backend instance; |
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193 |
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194 /** |
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195 * The database cleaner. Reference is stored here because |
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196 * the cleaner is woken up if the backend finds an outdated |
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197 * artifact. This artifact should be removed as soon as |
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198 * possible. |
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199 */ |
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200 protected DatabaseCleaner cleaner; |
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201 |
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202 /** |
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203 * To revive an artifact from the bytes coming from the database |
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204 * we need the artifact factory which references the artifact |
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205 * serializer which is able to do the reviving job. |
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206 */ |
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207 protected FactoryLookup factoryLookup; |
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208 |
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209 /** |
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210 * Little helper interface to decouple the ArtifactDatabase |
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211 * from the Backend. A ArtifactDatabase should depend on a |
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212 * Backend but a Backend not from an ArtifactDatabase. |
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213 */ |
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214 public interface FactoryLookup { |
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215 |
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216 /** |
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217 * Returns an ArtifactFactory which is bound to a given name. |
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218 * @param factoryName The name of the artifact factory. |
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219 * @return The ArtifactFactory bound to the factory name or |
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220 * null if not matching factory is found. |
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221 */ |
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222 ArtifactFactory getArtifactFactory(String factoryName); |
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223 |
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224 } // interface FactoryLookup |
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225 |
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226 /** |
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227 * Inner class that brigdes between the persisten form of the |
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228 * artifact and the living one inside the artifact database. |
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229 * After the describe(), feed(), advance() and out() operations |
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230 * of the artifact it must be possible to write to modified artifact |
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231 * back into the database. |
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232 */ |
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233 public final class PersistentArtifact |
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234 extends Id |
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235 { |
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236 private Artifact artifact; |
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237 private ArtifactSerializer serializer; |
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238 private Long ttl; |
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239 |
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240 /** |
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241 * Cronstructor to create a persistent artifact. |
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242 * @param artifact The living artifact. |
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243 * @param serializer The serializer to store the artifact |
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244 * after the operations. |
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245 * @param ttl The time to life of the artifact. |
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246 * @param id The database id of the artifact. |
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247 */ |
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248 public PersistentArtifact( |
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249 Artifact artifact, |
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250 ArtifactSerializer serializer, |
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251 Long ttl, |
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252 int id |
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253 ) { |
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254 super(id); |
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255 this.artifact = artifact; |
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256 this.serializer = serializer; |
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257 this.ttl = ttl; |
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258 } |
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259 |
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260 /** |
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261 * Returns the wrapped living artifact. |
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262 * @return the living artifact. |
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263 */ |
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264 public Artifact getArtifact() { |
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265 return artifact; |
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266 } |
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267 |
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268 /** |
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269 * Returns the serialized which is able to write a |
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270 * modified artifact back into the database. |
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271 * @return The serializer. |
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272 */ |
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273 public ArtifactSerializer getSerializer() { |
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274 return serializer; |
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275 } |
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276 |
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277 /** |
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278 * The time to life of the artifact. |
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279 * @return The time to live. |
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280 */ |
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281 public Long getTTL() { |
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282 return ttl; |
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283 } |
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284 |
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285 /** |
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286 * Stores the living artifact back into the database. |
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287 */ |
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288 public void store() { |
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289 if (logger.isDebugEnabled()) { |
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290 logger.debug("storing artifact id = " + getId()); |
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291 } |
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292 Backend.this.store(this); |
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293 } |
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294 |
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295 /** |
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296 * Only touches the access time of the artifact. |
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297 */ |
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298 public void touch() { |
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299 if (logger.isDebugEnabled()) { |
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300 logger.debug("touching artifact id = " + getId()); |
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301 } |
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302 Backend.this.touch(this); |
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303 } |
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304 } // class ArtifactWithId |
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305 |
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306 /** |
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307 * Default constructor |
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308 */ |
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309 public Backend() { |
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310 } |
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311 |
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312 /** |
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313 * Constructor to create a backend with a link to the database cleaner. |
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314 * @param cleaner The clean which periodically removes outdated |
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315 * artifacts from the database. |
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316 */ |
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317 public Backend(DatabaseCleaner cleaner) { |
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318 this.cleaner = cleaner; |
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319 } |
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320 |
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321 |
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322 /** |
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323 * Returns the singleton of this Backend. |
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324 * |
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325 * @return the backend. |
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326 */ |
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327 public static synchronized Backend getInstance() { |
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328 if (instance == null) { |
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329 instance = new Backend(); |
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330 } |
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331 |
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332 return instance; |
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333 } |
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334 |
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335 /** |
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336 * Sets the factory lookup mechanism to decouple ArtifactDatabase |
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337 * and Backend. |
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338 * @param factoryLookup |
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339 */ |
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340 public void setFactoryLookup(FactoryLookup factoryLookup) { |
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341 this.factoryLookup = factoryLookup; |
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342 } |
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343 |
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344 /** |
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345 * Sets the database cleaner explicitly. |
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346 * @param cleaner The database cleaner |
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347 */ |
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348 public void setCleaner(DatabaseCleaner cleaner) { |
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349 this.cleaner = cleaner; |
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350 } |
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351 |
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352 /** |
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353 * Returns a new unique identifier to external identify |
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354 * the artifact across the system. This implementation |
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355 * uses random UUIDs v4 to achieve this target. |
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356 * @return the new identifier |
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357 */ |
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358 public String newIdentifier() { |
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359 // TODO: check database for collisions. |
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360 return StringUtils.newUUID(); |
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361 } |
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362 |
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363 public boolean isValidIdentifier(String identifier) { |
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364 return StringUtils.checkUUID(identifier); |
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365 } |
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366 |
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367 /** |
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368 * Stores a new artifact into the database. |
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369 * @param artifact The artifact to be stored |
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370 * @param factory The factory which build the artifact |
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371 * @param ttl The initial time to life of the artifact. |
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372 * @return A persistent wrapper around the living |
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373 * artifact to be able to write modification later. |
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374 * @throws Exception Thrown if something went wrong with the |
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375 * storage process. |
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376 */ |
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377 public PersistentArtifact storeInitially( |
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378 Artifact artifact, |
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379 ArtifactFactory factory, |
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380 Long ttl |
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381 ) |
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382 throws Exception |
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383 { |
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384 return new PersistentArtifact( |
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385 artifact, |
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386 factory.getSerializer(), |
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387 ttl, |
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388 insertDatabase(artifact, factory, ttl)); |
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389 } |
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390 |
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391 /** |
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392 * Stores an artifact into database if it does not exist there. |
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393 * If it exists there it is only updated. |
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394 * @param artifact The artifact to store/update. |
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395 * @param factory The factory which created the artifact. |
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396 * @param ttl The initial time to live of the artifact. |
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397 * @return A persistent version of the artifact to be able |
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398 * to store a modification later. |
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399 * @throws Exception Thrown if something went wrong during |
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400 * storing/updating. |
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401 */ |
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402 public PersistentArtifact storeOrReplace( |
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403 Artifact artifact, |
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404 ArtifactFactory factory, |
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405 Long ttl |
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406 ) |
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407 throws Exception |
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408 { |
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409 return new PersistentArtifact( |
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410 artifact, |
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411 factory.getSerializer(), |
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412 ttl, |
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413 storeOrReplaceDatabase(artifact, factory, ttl)); |
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414 } |
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415 |
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416 /** |
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417 * Implementors of this interface are able to process the raw |
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418 * artifact data from the database for loading. |
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419 */ |
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420 public interface ArtifactLoader { |
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421 |
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422 /** |
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423 * Creates a custom object from the raw artifact database data. |
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424 * @param factory The factory that created this artifact. |
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425 * @param ttl The current time to life of the artifact. |
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426 * @param bytes The raw artifact bytes from the database. |
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427 * @param id The database id of the artifact. |
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428 * @return The custom object created by the implementation. |
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429 */ |
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430 Object load(ArtifactFactory factory, Long ttl, byte [] bytes, int id); |
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431 |
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432 } // interface ArtifactLoader |
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433 |
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434 /** |
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435 * Fetches an artifact from the database identified by the |
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436 * given identifier. |
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437 * @param identifer The identifier of the artifact. |
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438 * @return A persistent wrapper around the found artifact |
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439 * to be able to write back a modifaction later or null |
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440 * if no artifact is found for this identifier. |
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441 */ |
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442 public PersistentArtifact getArtifact(String identifer) { |
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443 |
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444 return (PersistentArtifact)loadArtifact( |
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445 identifer, |
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446 new ArtifactLoader() { |
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447 |
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448 public Object load( |
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449 ArtifactFactory factory, |
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450 Long ttl, |
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451 byte [] bytes, |
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452 int id |
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453 ) { |
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454 ArtifactSerializer serializer = factory.getSerializer(); |
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455 |
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456 Artifact artifact = serializer.fromBytes(bytes); |
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457 |
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458 return artifact == null |
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459 ? null |
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460 : new PersistentArtifact(artifact, serializer, ttl, id); |
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461 } |
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462 }); |
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463 } |
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464 |
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465 /** |
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466 * More general loading mechanism for artifacts. The concrete |
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467 * load processing is delegated to the given loader. |
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468 * @param identifer The identifier of the artifact. |
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469 * @param loader The loader which processes the raw database data. |
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470 * @return The object created by the loader. |
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471 */ |
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472 public Object loadArtifact( |
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473 final String identifer, |
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474 final ArtifactLoader loader |
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475 ) { |
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476 if (!isValidIdentifier(identifer)) { |
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477 return null; |
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478 } |
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479 |
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480 final Object [] loaded = new Object[1]; |
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481 |
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482 SQLExecutor exec = new SQLExecutor() { |
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483 public boolean doIt() throws SQLException { |
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484 prepareStatement(SQL_LOAD_BY_GID); |
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485 stmnt.setString(1, identifer); |
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486 |
174
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487 result = stmnt.executeQuery(); |
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488 |
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489 if (!result.next()) { |
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490 return false; |
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491 } |
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492 |
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493 int id = result.getInt(1); |
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494 long ttlX = result.getLong(3); |
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495 |
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496 Long ttl = result.wasNull() ? null : Long.valueOf(ttlX); |
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497 |
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498 if (ttl != null) { // real time to life |
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499 long last_access = result.getTimestamp(2).getTime(); |
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500 if (last_access + ttlX < System.currentTimeMillis()) { |
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501 artifactOutdated(id); |
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502 return false; |
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503 } |
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504 } |
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505 |
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506 String factoryName = result.getString(4); |
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507 |
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508 if (factoryLookup == null) { |
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509 logger.error("factory lookup == null"); |
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510 return false; |
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511 } |
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512 |
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513 ArtifactFactory factory = factoryLookup |
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514 .getArtifactFactory(factoryName); |
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515 |
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516 if (factory == null) { |
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517 logger.error("factory '" + factoryName + "' not found"); |
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518 return false; |
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519 } |
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520 |
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521 byte [] bytes = result.getBytes(5); |
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522 |
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523 loaded[0] = loader.load(factory, ttl, bytes, id); |
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524 return true; |
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525 } |
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526 }; |
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527 |
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528 return exec.runRead() ? loaded[0] : null; |
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529 } |
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530 |
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531 /** |
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532 * Called if the load mechanism found an outdated artifact. |
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533 * It wakes up the database cleaner. |
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534 * @param id The id of the outdated artifact. |
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535 */ |
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536 protected void artifactOutdated(int id) { |
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537 if (logger.isDebugEnabled()) { |
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538 logger.info("artifactOutdated: id = " + id); |
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539 } |
30
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540 if (cleaner != null) { |
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541 cleaner.wakeup(); |
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542 } |
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543 } |
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544 |
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545 public Artifact reviveArtifact(String factoryName, byte [] bytes) { |
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546 if (factoryLookup == null) { |
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547 logger.error("reviveArtifact: factory lookup == null"); |
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548 return null; |
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549 } |
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550 ArtifactFactory factory = factoryLookup |
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551 .getArtifactFactory(factoryName); |
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552 |
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553 if (factory == null) { |
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554 logger.error( |
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555 "reviveArtifact: no factory '" + factoryName + "' found"); |
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556 return null; |
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557 } |
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558 |
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559 ArtifactSerializer serializer = factory.getSerializer(); |
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560 |
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561 return serializer.fromBytes(bytes); |
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562 } |
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563 |
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564 /** |
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565 * Internal method to store/replace an artifact inside the database. |
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566 * If an artifact with the given identifier does not exists it is |
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567 * created else only the content data is updated. |
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568 * @param artifact The artifact to be store/update inside the database. |
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569 * @param factory The factory that created the artifact. |
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570 * @param ttl The initial time to life of the artifact. |
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571 * @return The database id of the stored/updated artifact. |
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572 */ |
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573 protected int storeOrReplaceDatabase( |
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574 final Artifact artifact, |
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575 final ArtifactFactory factory, |
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576 final Long ttl |
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577 ) { |
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578 final String uuid = artifact.identifier(); |
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579 |
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580 if (!isValidIdentifier(uuid)) { |
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581 throw new RuntimeException("No valid UUID"); |
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582 } |
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583 |
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584 final int [] id = new int[1]; |
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585 |
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586 SQLExecutor exec = new SQLExecutor() { |
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587 public boolean doIt() throws SQLException { |
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588 |
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589 prepareStatement(SQL_GET_ID); |
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590 stmnt.setString(1, uuid); |
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591 result = stmnt.executeQuery(); |
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592 |
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593 Integer ID = result.next() |
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594 ? Integer.valueOf(result.getInt(1)) |
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595 : null; |
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596 |
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597 reset(); |
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598 |
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599 if (ID != null) { // already in database |
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600 prepareStatement(SQL_REPLACE); |
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601 |
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602 if (ttl == null) { |
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603 stmnt.setNull(1, Types.BIGINT); |
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604 } |
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605 else { |
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606 stmnt.setLong(1, ttl.longValue()); |
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607 } |
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608 |
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609 stmnt.setString(2, factory.getName()); |
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610 stmnt.setBytes( |
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611 3, |
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612 factory.getSerializer().toBytes(artifact)); |
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613 id[0] = ID.intValue(); |
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614 stmnt.setInt(4, id[0]); |
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615 } |
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616 else { // new artifact |
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617 prepareStatement(SQL_NEXT_ID); |
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618 result = stmnt.executeQuery(); |
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619 |
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620 if (!result.next()) { |
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621 logger.error("No id generated"); |
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622 return false; |
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623 } |
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624 |
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625 reset(); |
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626 |
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627 prepareStatement(SQL_INSERT); |
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628 |
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629 id[0] = result.getInt(1); |
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630 stmnt.setInt(1, id[0]); |
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631 stmnt.setString(2, uuid); |
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632 if (ttl == null) { |
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633 stmnt.setNull(3, Types.BIGINT); |
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634 } |
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635 else { |
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636 stmnt.setLong(3, ttl.longValue()); |
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637 } |
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638 |
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639 stmnt.setString(4, factory.getName()); |
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640 |
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641 stmnt.setBytes( |
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642 5, |
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643 factory.getSerializer().toBytes(artifact)); |
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644 } |
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645 stmnt.execute(); |
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646 conn.commit(); |
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647 return true; |
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648 } |
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649 }; |
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650 |
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651 if (!exec.runWrite()) { |
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652 throw new RuntimeException("failed insert artifact into database"); |
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653 } |
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654 |
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655 return id[0]; |
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656 } |
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657 |
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658 /** |
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659 * Internal method to store an artifact inside the database. |
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660 * @param artifact The artifact to be stored. |
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661 * @param factory The factory which created the artifact. |
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662 * @param ttl The initial time to live of the artifact. |
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663 * @return The database id of the stored artifact. |
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664 */ |
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665 protected int insertDatabase( |
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666 final Artifact artifact, |
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667 final ArtifactFactory factory, |
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668 final Long ttl |
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669 ) { |
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670 final int [] id = new int[1]; |
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671 |
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672 SQLExecutor exec = new SQLExecutor() { |
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673 public boolean doIt() throws SQLException { |
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674 prepareStatement(SQL_NEXT_ID); |
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675 result = stmnt.executeQuery(); |
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676 |
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677 if (!result.next()) { |
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678 logger.error("No id generated"); |
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679 return false; |
80
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680 } |
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681 |
174
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682 id[0] = result.getInt(1); |
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683 |
174
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684 reset(); |
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685 prepareStatement(SQL_INSERT); |
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686 |
174
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687 String uuid = artifact.identifier(); |
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688 stmnt.setInt(1, id[0]); |
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689 stmnt.setString(2, uuid); |
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690 if (ttl == null) { |
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691 stmnt.setNull(3, Types.BIGINT); |
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692 } |
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693 else { |
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694 stmnt.setLong(3, ttl.longValue()); |
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695 } |
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696 |
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697 stmnt.setString(4, factory.getName()); |
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698 |
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|
699 stmnt.setBytes( |
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700 5, |
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701 factory.getSerializer().toBytes(artifact)); |
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702 |
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703 stmnt.execute(); |
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704 |
174
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705 conn.commit(); |
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706 return true; |
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707 } |
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708 }; |
14
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709 |
174
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710 if (!exec.runWrite()) { |
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711 throw new RuntimeException("failed insert artifact into database"); |
14
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712 } |
174
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713 |
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714 return id[0]; |
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715 } |
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716 |
90
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717 /** |
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718 * Touches the access timestamp of a given artifact to prevent |
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719 * that it will be removed from the database by the database cleaner. |
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720 * @param artifact The persistent wrapper around the living artifact. |
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721 */ |
174
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722 public void touch(final PersistentArtifact artifact) { |
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723 new SQLExecutor() { |
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724 public boolean doIt() throws SQLException { |
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725 prepareStatement(SQL_TOUCH); |
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726 stmnt.setInt(1, artifact.getId()); |
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727 stmnt.execute(); |
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728 conn.commit(); |
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729 return true; |
14
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730 } |
174
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731 }.runWrite(); |
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732 } |
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733 |
90
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|
734 /** |
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735 * Writes modification of an artifact back to the database. |
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736 * @param artifact The persistent wrapper around a living |
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737 * artifact. |
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|
738 */ |
174
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739 public void store(final PersistentArtifact artifact) { |
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740 new SQLExecutor() { |
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741 public boolean doIt() throws SQLException { |
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742 prepareStatement(SQL_UPDATE); |
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743 stmnt.setInt(2, artifact.getId()); |
26
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|
744 |
174
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745 byte [] bytes = artifact |
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746 .getSerializer() |
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747 .toBytes(artifact.getArtifact()); |
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748 |
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749 stmnt.setBytes(1, bytes); |
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750 stmnt.execute(); |
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751 conn.commit(); |
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752 return true; |
26
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|
753 } |
174
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754 }.runWrite(); |
14
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|
755 } |
133
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Fixed typo in keys.
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|
756 |
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|
757 public User createUser( |
174
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758 final String name, |
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759 final Document role, |
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760 final UserFactory factory, |
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761 final Object context |
133
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762 ) { |
174
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763 final User [] user = new User[1]; |
138
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764 |
174
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765 SQLExecutor exec = new SQLExecutor() { |
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766 public boolean doIt() throws SQLException { |
138
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767 |
174
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768 prepareStatement(SQL_USERS_NEXT_ID); |
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769 result = stmnt.executeQuery(); |
138
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770 |
146
967dc552455d
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|
771 if (!result.next()) { |
174
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772 return false; |
138
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773 } |
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|
774 |
145
c0d025df722d
Enable backend to delete users
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|
775 int id = result.getInt(1); |
138
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|
776 |
174
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777 reset(); |
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|
778 |
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779 String identifier = newIdentifier(); |
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780 |
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781 prepareStatement(SQL_USERS_INSERT); |
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782 |
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783 stmnt.setInt(1, id); |
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784 stmnt.setString(2, identifier); |
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785 stmnt.setString(3, name); |
138
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786 |
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787 byte [] roleData = role == null |
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788 ? null |
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789 : XMLUtils.toByteArray(role); |
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790 |
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791 if (roleData == null) { |
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792 stmnt.setNull(4, Types.BIGINT); |
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793 } |
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794 else { |
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795 stmnt.setBytes(4, roleData); |
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796 } |
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797 |
174
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798 stmnt.execute(); |
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799 conn.commit(); |
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800 |
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801 user[0] = factory.createUser( |
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802 identifier, name, role, context); |
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803 return true; |
138
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804 } |
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805 }; |
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806 |
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807 return exec.runWrite() ? user[0] : null; |
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808 } |
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809 |
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810 public boolean deleteUser(final String identifier) { |
144
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811 |
177
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812 if (!isValidIdentifier(identifier)) { |
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813 return false; |
147
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814 } |
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815 |
174
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816 SQLExecutor exec = new SQLExecutor() { |
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817 public boolean doIt() throws SQLException { |
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818 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
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819 |
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820 stmnt.setString(1, identifier); |
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821 result = stmnt.executeQuery(); |
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822 |
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823 if (!result.next()) { // No such user |
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824 return false; |
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825 } |
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826 |
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827 int id = result.getInt(1); |
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828 |
174
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829 reset(); |
144
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830 |
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831 // outdate the artifacts exclusively used by the user |
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832 |
174
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833 prepareStatement(SQL_OUTDATE_ARTIFACTS_USER); |
144
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834 stmnt.setInt(1, id); |
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835 stmnt.setInt(2, id); |
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836 stmnt.execute(); |
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837 |
174
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838 reset(); |
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839 |
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840 // delete the collection items of the user |
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841 |
174
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842 prepareStatement(SQL_DELETE_USER_COLLECTION_ITEMS); |
144
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843 stmnt.setInt(1, id); |
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844 stmnt.execute(); |
174
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845 |
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846 reset(); |
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847 |
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848 // delete the collections of the user |
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849 |
174
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850 prepareStatement(SQL_USERS_DELETE_COLLECTIONS); |
144
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851 stmnt.setInt(1, id); |
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852 stmnt.execute(); |
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853 |
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854 reset(); |
144
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|
855 |
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|
856 // delete the user |
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857 |
174
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858 prepareStatement(SQL_USERS_DELETE_ID); |
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859 stmnt.setInt(1, id); |
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860 stmnt.execute(); |
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|
861 |
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862 conn.commit(); |
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863 return true; |
144
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864 } |
174
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865 }; |
154
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866 |
174
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867 return exec.runWrite(); |
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868 } |
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869 |
157
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870 public User getUser( |
174
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871 final String identifier, |
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872 final UserFactory factory, |
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873 final Object context |
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874 ) { |
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875 if (!isValidIdentifier(identifier)) { |
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876 logger.debug("Invalid UUID: '" + identifier + "'"); |
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877 return null; |
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878 } |
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|
879 |
174
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880 final User [] user = new User[1]; |
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881 |
174
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882 SQLExecutor exec = new SQLExecutor() { |
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883 public boolean doIt() throws SQLException { |
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884 prepareStatement(SQL_USERS_SELECT_GID); |
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885 stmnt.setString(1, identifier); |
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886 result = stmnt.executeQuery(); |
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887 if (!result.next()) { // no such user |
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888 return false; |
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889 } |
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890 // omit id |
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891 String name = result.getString(2); |
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892 byte [] roleData = result.getBytes(3); |
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893 |
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894 Document role = XMLUtils.fromByteArray(roleData); |
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895 |
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896 user[0] = factory.createUser( |
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897 identifier, name, role, context); |
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898 return true; |
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899 } |
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|
900 }; |
147
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Added code to load user from database.
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146
diff
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|
901 |
174
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|
902 return exec.runRead() ? user[0] : null; |
133
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Fixed typo in keys.
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diff
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|
903 } |
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diff
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|
904 |
174
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|
905 public User [] getUsers( |
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|
906 final UserFactory factory, |
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|
907 final Object context |
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|
908 ) { |
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|
909 final ArrayList<User> users = new ArrayList<User>(); |
148
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Added code to load all users from database.
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|
910 |
174
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|
911 SQLExecutor exec = new SQLExecutor() { |
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|
912 public boolean doIt() throws SQLException { |
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|
913 prepareStatement(SQL_USERS_SELECT_ALL); |
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|
914 result = stmnt.executeQuery(); |
148
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|
915 |
174
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Reduce the code repetition and the complexity of the backend.
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diff
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|
916 while (result.next()) { |
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Reduce the code repetition and the complexity of the backend.
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|
917 // omit id |
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|
918 String identifier = result.getString(2); |
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|
919 String name = result.getString(3); |
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|
920 byte [] roleData = result.getBytes(4); |
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|
921 |
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diff
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|
922 Document role = XMLUtils.fromByteArray(roleData); |
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|
923 User user = factory.createUser( |
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|
924 identifier, name, role, context); |
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|
925 users.add(user); |
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|
926 } |
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|
927 return true; |
148
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diff
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|
928 } |
174
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|
929 }; |
148
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147
diff
changeset
|
930 |
174
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diff
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|
931 return exec.runRead() |
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|
932 ? users.toArray(new User[users.size()]) |
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|
933 : null; |
133
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Fixed typo in keys.
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128
diff
changeset
|
934 } |
156
a76de72ad6d1
Added stubs for the collection handling in db backend.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
154
diff
changeset
|
935 |
159
db0d20440b92
Added code to create collections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff
changeset
|
936 public ArtifactCollection createCollection( |
174
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|
937 final String ownerIdentifier, |
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|
938 final String name, |
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diff
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|
939 final ArtifactCollectionFactory factory, |
199
face2302387c
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diff
changeset
|
940 final Document attribute, |
174
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diff
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|
941 final Object context |
159
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diff
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|
942 ) { |
db0d20440b92
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diff
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|
943 if (name == null) { |
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diff
changeset
|
944 logger.debug("Name is null"); |
db0d20440b92
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff
changeset
|
945 return null; |
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158
diff
changeset
|
946 } |
db0d20440b92
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
158
diff
changeset
|
947 |
177
77cd37a93fca
Backend: isIdentifierValid more symmetric to new newIndentifier
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
176
diff
changeset
|
948 if (!isValidIdentifier(ownerIdentifier)) { |
159
db0d20440b92
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diff
changeset
|
949 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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158
diff
changeset
|
950 return null; |
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diff
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|
951 } |
db0d20440b92
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
158
diff
changeset
|
952 |
174
25d472a67a9f
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diff
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|
953 final ArtifactCollection [] collection = |
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diff
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|
954 new ArtifactCollection[1]; |
159
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diff
changeset
|
955 |
174
25d472a67a9f
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diff
changeset
|
956 SQLExecutor exec = new SQLExecutor() { |
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diff
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|
957 public boolean doIt() throws SQLException { |
159
db0d20440b92
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diff
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|
958 // fetch owner id |
174
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diff
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|
959 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
159
db0d20440b92
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diff
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|
960 stmnt.setString(1, ownerIdentifier); |
db0d20440b92
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diff
changeset
|
961 result = stmnt.executeQuery(); |
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diff
changeset
|
962 |
db0d20440b92
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diff
changeset
|
963 if (!result.next()) { // no such user |
174
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|
964 return false; |
159
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diff
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|
965 } |
db0d20440b92
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diff
changeset
|
966 |
db0d20440b92
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diff
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|
967 int ownerId = result.getInt(1); |
174
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diff
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|
968 reset(); |
159
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diff
changeset
|
969 |
db0d20440b92
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diff
changeset
|
970 // fetch new collection seq number. |
174
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diff
changeset
|
971 prepareStatement(SQL_COLLECTIONS_NEXT_ID); |
159
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diff
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|
972 result = stmnt.executeQuery(); |
db0d20440b92
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diff
changeset
|
973 |
db0d20440b92
Added code to create collections.
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parents:
158
diff
changeset
|
974 if (!result.next()) { // no identifier generated |
174
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|
975 return false; |
159
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diff
changeset
|
976 } |
db0d20440b92
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
158
diff
changeset
|
977 |
db0d20440b92
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parents:
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diff
changeset
|
978 int id = result.getInt(1); |
174
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diff
changeset
|
979 reset(); |
159
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diff
changeset
|
980 |
db0d20440b92
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diff
changeset
|
981 String identifier = newIdentifier(); |
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diff
changeset
|
982 |
174
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diff
changeset
|
983 prepareStatement(SQL_COLLECTIONS_INSERT); |
159
db0d20440b92
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parents:
158
diff
changeset
|
984 |
db0d20440b92
Added code to create collections.
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parents:
158
diff
changeset
|
985 stmnt.setInt(1, id); |
db0d20440b92
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diff
changeset
|
986 stmnt.setString(2, identifier); |
161
e4a1562dfc21
Bugfixed the collection creation in the Backend.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
159
diff
changeset
|
987 stmnt.setString(3, name); |
e4a1562dfc21
Bugfixed the collection creation in the Backend.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
159
diff
changeset
|
988 stmnt.setInt(4, ownerId); |
159
db0d20440b92
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diff
changeset
|
989 |
db0d20440b92
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diff
changeset
|
990 // XXX: A bit odd: we don't have a collection, yet. |
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|
991 Long ttl = factory.timeToLiveUntouched(null, context); |
db0d20440b92
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diff
changeset
|
992 |
db0d20440b92
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158
diff
changeset
|
993 if (ttl == null) { |
db0d20440b92
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diff
changeset
|
994 stmnt.setNull(5, Types.BIGINT); |
db0d20440b92
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parents:
158
diff
changeset
|
995 } |
db0d20440b92
Added code to create collections.
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parents:
158
diff
changeset
|
996 else { |
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Added code to create collections.
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158
diff
changeset
|
997 stmnt.setLong(5, ttl); |
db0d20440b92
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158
diff
changeset
|
998 } |
db0d20440b92
Added code to create collections.
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parents:
158
diff
changeset
|
999 |
199
face2302387c
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parents:
194
diff
changeset
|
1000 byte [] data = XMLUtils.toByteArray(attribute); |
face2302387c
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194
diff
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|
1001 |
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diff
changeset
|
1002 if (data == null) { |
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diff
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|
1003 stmnt.setNull(6, Types.BINARY); |
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parents:
194
diff
changeset
|
1004 } |
face2302387c
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parents:
194
diff
changeset
|
1005 else { |
face2302387c
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parents:
194
diff
changeset
|
1006 stmnt.setBytes(6, data); |
face2302387c
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parents:
194
diff
changeset
|
1007 } |
face2302387c
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parents:
194
diff
changeset
|
1008 |
159
db0d20440b92
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diff
changeset
|
1009 stmnt.execute(); |
db0d20440b92
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diff
changeset
|
1010 conn.commit(); |
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diff
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|
1011 |
174
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diff
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|
1012 reset(); |
170
ac0f8bd97277
Fix parameter propagation of creation time ond collection names.
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parents:
167
diff
changeset
|
1013 |
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1014 // fetch creation time from database |
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1015 // done this way to use the time system |
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1016 // of the database. |
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1017 |
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1018 prepareStatement(SQL_COLLECTIONS_CREATION_TIME); |
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1019 stmnt.setInt(1, id); |
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1020 |
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1021 result = stmnt.executeQuery(); |
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1022 |
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1023 Date creationTime = null; |
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1024 |
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1025 if (result.next()) { |
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1026 Timestamp timestamp = result.getTimestamp(1); |
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1027 creationTime = new Date(timestamp.getTime()); |
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1028 } |
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1029 |
174
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1030 collection[0] = factory.createCollection( |
199
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1031 identifier, name, creationTime, attribute, context); |
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1032 |
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1033 return true; |
159
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1034 } |
174
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1035 }; |
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1036 |
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1037 return exec.runWrite() ? collection[0]: null; |
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1038 } |
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1039 |
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1040 public ArtifactCollection [] listCollections( |
174
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1041 final String ownerIdentifier, |
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1042 final Document data, |
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1043 final ArtifactCollectionFactory collectionFactory, |
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1044 final UserFactory userFactory, |
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1045 final Object context |
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1046 ) { |
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1047 if (ownerIdentifier != null |
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1048 && !isValidIdentifier(ownerIdentifier)) { |
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1049 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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1050 return null; |
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1051 } |
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1052 |
174
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1053 final ArrayList<ArtifactCollection> collections = |
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1054 new ArrayList<ArtifactCollection>(); |
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1055 |
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1056 SQLExecutor exec = new SQLExecutor() { |
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1057 |
174
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1058 public boolean doIt() throws SQLException { |
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1059 |
174
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1060 if (ownerIdentifier != null) { |
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1061 prepareStatement(SQL_COLLECTIONS_SELECT_USER); |
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1062 stmnt.setString(1, ownerIdentifier); |
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1063 } |
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1064 else { |
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1065 prepareStatement(SQL_COLLECTIONS_SELECT_ALL); |
167
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1066 } |
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1067 |
174
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1068 result = stmnt.executeQuery(); |
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1069 |
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1070 while (result.next()) { |
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1071 String collectionIdentifier = result.getString(1); |
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1072 String collectionName = result.getString(2); |
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1073 Date creationTime = |
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1074 new Date(result.getTimestamp(3).getTime()); |
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1075 String userIdentifier = result.getString(4); |
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1076 |
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1077 ArtifactCollection collection = |
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1078 collectionFactory.createCollection( |
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1079 collectionIdentifier, |
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1080 collectionName, |
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1081 creationTime, |
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1082 data, |
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1083 context); |
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1084 |
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1085 if (userIdentifier != null) { |
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1086 collection.setUser(new LazyBackendUser( |
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1087 userIdentifier, userFactory, Backend.this, context)); |
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1088 } |
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1089 |
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1090 collections.add(collection); |
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1091 } |
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1092 return true; |
167
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1093 } |
174
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1094 }; |
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1095 |
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1096 return exec.runRead() |
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1097 ? collections.toArray(new ArtifactCollection[collections.size()]) |
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1098 : null; |
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1099 } |
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1100 |
174
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1101 |
175
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1102 public boolean deleteCollection(final String collectionId) { |
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1103 if (!isValidIdentifier(collectionId)) { |
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1104 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1105 return false; |
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1106 } |
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1107 SQLExecutor exec = new SQLExecutor() { |
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1108 public boolean doIt() throws SQLException { |
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1109 // fetch collection id |
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1110 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1111 stmnt.setString(1, collectionId); |
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1112 result = stmnt.executeQuery(); |
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1113 if (!result.next()) { |
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1114 logger.debug("No such collection: " + collectionId); |
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1115 return false; |
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1116 } |
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1117 int id = result.getInt(1); |
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1118 reset(); |
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1119 |
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1120 // outdate artifacts that are only in this collection |
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1121 prepareStatement(SQL_OUTDATE_ARTIFACTS_COLLECTION); |
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1122 stmnt.setInt(1, id); |
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1123 stmnt.setInt(2, id); |
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1124 stmnt.execute(); |
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1125 reset(); |
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1126 |
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1127 // delete the collection items |
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1128 prepareStatement(SQL_DELETE_COLLECTION_ITEMS); |
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1129 stmnt.setInt(1, id); |
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1130 stmnt.execute(); |
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1131 reset(); |
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1132 |
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1133 // delete the collection |
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1134 prepareStatement(SQL_DELETE_COLLECTION); |
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1135 stmnt.setInt(1, id); |
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1136 stmnt.execute(); |
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1137 conn.commit(); |
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1138 return true; |
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1139 } |
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1140 }; |
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1141 return exec.runWrite(); |
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1142 } |
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1143 |
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1144 public Document getCollectionAttribute( |
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1145 final String collectionId, |
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1146 final String artifactId |
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1147 ) { |
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1148 if (!isValidIdentifier(collectionId)) { |
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1149 logger.debug("collection id is not valid: " + collectionId); |
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1150 return null; |
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1151 } |
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1152 if (!isValidIdentifier(artifactId)) { |
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1153 logger.debug("artifact id is not valid: " + artifactId); |
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1154 return null; |
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1155 } |
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1156 |
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1157 final Document [] document = new Document[1]; |
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1158 |
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1159 SQLExecutor exec = new SQLExecutor() { |
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1160 public boolean doIt() throws SQLException { |
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1161 prepareStatement(SQL_COLLECTION_ITEM_GET_ATTRIBUTE); |
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1162 stmnt.setString(1, collectionId); |
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1163 stmnt.setString(2, artifactId); |
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1164 result = stmnt.executeQuery(); |
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1165 if (!result.next()) { |
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1166 logger.debug("No such collection item"); |
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1167 return false; |
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1168 } |
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1169 document[0] = XMLUtils.fromByteArray(result.getBytes(1)); |
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1170 return true; |
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1171 } |
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1172 }; |
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1173 |
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1174 return exec.runRead() ? document[0] : null; |
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1175 } |
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1176 |
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1177 public boolean setCollectionAttribute( |
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1178 final String collectionId, |
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1179 final String artifactId, |
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1180 Document attribute |
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1181 ) { |
179
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1182 if (!isValidIdentifier(collectionId)) { |
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1183 logger.debug("collection id is not valid: " + collectionId); |
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1184 return false; |
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1185 } |
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1186 if (!isValidIdentifier(artifactId)) { |
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1187 logger.debug("artifact id is not valid: " + artifactId); |
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1188 return false; |
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1189 } |
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1190 |
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1191 final byte [] data = XMLUtils.toByteArray(attribute); |
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1192 |
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1193 return new SQLExecutor() { |
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1194 public boolean doIt() throws SQLException { |
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1195 |
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1196 // set the column in collection items |
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1197 prepareStatement(SQL_COLLECTION_ITEM_SET_ATTRIBUTE); |
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1198 if (data == null) { |
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1199 stmnt.setNull(1, Types.BINARY); |
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1200 } |
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1201 else { |
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1202 stmnt.setBytes(1, data); |
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|
1203 } |
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1204 stmnt.setString(2, collectionId); |
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1205 stmnt.setString(3, artifactId); |
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1206 stmnt.execute(); |
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1207 reset(); |
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1208 |
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1209 // touch the collection |
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1210 prepareStatement(SQL_COLLECTIONS_TOUCH_BY_GID); |
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1211 stmnt.setString(1, collectionId); |
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1212 stmnt.execute(); |
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1213 |
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1214 conn.commit(); |
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1215 return true; |
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1216 } |
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1217 }.runWrite(); |
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1218 } |
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1219 |
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1220 public boolean addCollectionArtifact( |
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1221 final String collectionId, |
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1222 final String artifactId, |
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1223 final Document attribute |
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1224 ) { |
177
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1225 if (!isValidIdentifier(collectionId)) { |
176
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1226 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1227 return false; |
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1228 } |
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1229 |
177
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1230 if (!isValidIdentifier(artifactId)) { |
176
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1231 logger.debug("Invalid artifact id: '" + artifactId + "'"); |
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1232 return false; |
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1233 } |
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1234 |
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1235 SQLExecutor exec = new SQLExecutor() { |
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1236 public boolean doIt() throws SQLException { |
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1237 // fetch artifact id |
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1238 prepareStatement(SQL_GET_ID); |
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1239 stmnt.setString(1, artifactId); |
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1240 result = stmnt.executeQuery(); |
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1241 if (!result.next()) { |
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1242 logger.debug("No such artifact: " + artifactId); |
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1243 return false; |
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1244 } |
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1245 int aid = result.getInt(1); |
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1246 reset(); |
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1247 |
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1248 // fetch collection id |
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1249 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1250 stmnt.setString(1, collectionId); |
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1251 result = stmnt.executeQuery(); |
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1252 if (!result.next()) { |
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1253 logger.debug("No such collection: " + collectionId); |
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1254 } |
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1255 int cid = result.getInt(1); |
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1256 reset(); |
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1257 |
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1258 // check if artifact is already in collection |
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1259 prepareStatement(SQL_COLLECTION_CHECK_ARTIFACT); |
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1260 stmnt.setInt(1, aid); |
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1261 stmnt.setInt(2, cid); |
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1262 result = stmnt.executeQuery(); |
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1263 if (result.next()) { |
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1264 logger.debug("artifact already in collection"); |
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1265 return false; |
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1266 } |
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1267 reset(); |
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1268 |
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1269 // fetch fresh id for new collection item |
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1270 prepareStatement(SQL_COLLECTION_ITEMS_ID_NEXTVAL); |
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1271 result = stmnt.executeQuery(); |
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1272 if (!result.next()) { |
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1273 logger.debug("no collection item id generated"); |
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1274 return false; |
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1275 } |
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1276 int ci_id = result.getInt(1); |
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1277 reset(); |
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1278 |
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1279 // insert new collection item |
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1280 prepareStatement(SQL_COLLECTION_ITEMS_INSERT); |
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1281 stmnt.setInt(1, ci_id); |
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1282 stmnt.setInt(2, cid); |
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1283 stmnt.setInt(3, aid); |
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1284 |
206
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1285 byte [] data = XMLUtils.toByteArray(attribute); |
176
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1286 |
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1287 if (data == null) { |
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1288 stmnt.setNull(4, Types.BINARY); |
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1289 } |
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1290 else { |
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1291 stmnt.setBytes(4, data); |
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1292 } |
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1293 stmnt.execute(); |
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1294 conn.commit(); |
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1295 |
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1296 return true; |
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1297 } |
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1298 }; |
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1299 return exec.runWrite(); |
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1300 } |
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1301 |
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1302 public boolean removeCollectionArtifact( |
180
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1303 final String collectionId, |
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1304 final String artifactId |
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1305 ) { |
180
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1306 if (!isValidIdentifier(collectionId)) { |
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1307 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1308 return false; |
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1309 } |
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1310 return new SQLExecutor() { |
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1311 public boolean doIt() throws SQLException { |
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1312 |
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1313 // fetch id, collection id and artitfact id |
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1314 prepareStatement(SQL_COLLECTION_ITEM_ID_CID_AID); |
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1315 stmnt.setString(1, collectionId); |
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1316 stmnt.setString(2, artifactId); |
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1317 result = stmnt.executeQuery(); |
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1318 if (!result.next()) { |
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1319 logger.debug("No such collection item"); |
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1320 return false; |
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1321 } |
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1322 int id = result.getInt(1); |
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1323 int cid = result.getInt(2); |
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1324 int aid = result.getInt(3); |
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1325 reset(); |
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1326 |
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1327 // outdate artifact iff it is only in this collection |
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1328 prepareStatement(SQL_COLLECTION_ITEM_OUTDATE_ARTIFACT); |
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1329 stmnt.setInt(1, aid); |
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1330 stmnt.setInt(2, cid); |
194
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1331 stmnt.setInt(3, aid); |
180
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1332 stmnt.execute(); |
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1333 reset(); |
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1334 |
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1335 // delete collection item |
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1336 prepareStatement(SQL_COLLECTION_ITEM_DELETE); |
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1337 stmnt.setInt(1, id); |
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1338 stmnt.execute(); |
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1339 reset(); |
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1340 |
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1341 // touch collection |
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1342 prepareStatement(SQL_COLLECTIONS_TOUCH_BY_ID); |
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1343 stmnt.setInt(1, cid); |
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1344 stmnt.execute(); |
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1345 |
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1346 conn.commit(); |
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1347 return true; |
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1348 } |
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1349 }.runWrite(); |
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1350 } |
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1351 |
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1352 public CollectionItem [] listCollectionArtifacts( |
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1353 final String collectionId |
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1354 ) { |
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1355 if (!isValidIdentifier(collectionId)) { |
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1356 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1357 return null; |
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1358 } |
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1359 |
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1360 final ArrayList<CollectionItem> collectionItems = |
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1361 new ArrayList<CollectionItem>(); |
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1362 |
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1363 SQLExecutor exec = new SQLExecutor() { |
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1364 public boolean doIt() throws SQLException { |
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1365 prepareStatement(SQL_COLLECTION_ITEMS_LIST_GID); |
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1366 stmnt.setString(1, collectionId); |
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1367 result = stmnt.executeQuery(); |
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1368 while (result.next()) { |
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1369 CollectionItem item = new DefaultCollectionItem( |
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1370 result.getString(1), |
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1371 result.getBytes(2)); |
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1372 collectionItems.add(item); |
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1373 } |
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1374 return true; |
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1375 } |
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1376 }; |
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1377 |
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1378 return exec.runRead() |
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1379 ? collectionItems.toArray( |
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1380 new CollectionItem[collectionItems.size()]) |
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1381 : null; |
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1382 } |
13
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1383 } |
79
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1384 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |