Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java @ 177:77cd37a93fca
Backend: isIdentifierValid more symmetric to new newIndentifier
artifacts/trunk@1403 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 06 Mar 2011 10:03:53 +0000 |
parents | a0eff2227588 |
children | 535e4ea2ef9b |
rev | line source |
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1 /* |
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2 * Copyright (c) 2010 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 |
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9 package de.intevation.artifactdatabase; |
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10 |
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11 import de.intevation.artifacts.Artifact; |
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12 import de.intevation.artifacts.ArtifactCollection; |
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13 import de.intevation.artifacts.ArtifactCollectionFactory; |
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14 import de.intevation.artifacts.ArtifactFactory; |
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15 import de.intevation.artifacts.ArtifactSerializer; |
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16 import de.intevation.artifacts.User; |
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17 import de.intevation.artifacts.UserFactory; |
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18 |
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19 import de.intevation.artifacts.common.utils.XMLUtils; |
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20 |
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21 import java.sql.SQLException; |
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22 import java.sql.Timestamp; |
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23 import java.sql.Types; |
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24 |
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25 import java.util.ArrayList; |
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26 import java.util.Date; |
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27 |
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28 import org.apache.log4j.Logger; |
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29 |
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30 import org.w3c.dom.Document; |
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31 |
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32 /** |
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33 * The backend implements the low level layer used to store artifacts |
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34 * in a SQL database. |
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35 * |
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36 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> |
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37 */ |
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38 public class Backend |
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39 implements DatabaseCleaner.ArtifactReviver |
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40 { |
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41 private static Logger logger = Logger.getLogger(Backend.class); |
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42 |
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43 /** |
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44 * The SQL statement to create new artifact id inside the database. |
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45 */ |
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46 public static final String SQL_NEXT_ID = |
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47 SQL.get("artifacts.id.nextval"); |
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48 |
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49 /** |
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50 * The SQL statement to insert an artifact into the database. |
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51 */ |
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52 public static final String SQL_INSERT = |
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53 SQL.get("artifacts.insert"); |
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54 |
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55 /** |
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56 * The SQL statement to update some columns of an existing |
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57 * artifact in the database. |
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58 */ |
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59 public static final String SQL_UPDATE = |
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60 SQL.get("artifacts.update"); |
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61 |
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62 /** |
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63 * The SQL statement to touch the access time of an |
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64 * artifact inside the database. |
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65 */ |
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66 public static final String SQL_TOUCH = |
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67 SQL.get("artifacts.touch"); |
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68 |
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69 /** |
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70 * The SQL statement to load an artifact by a given |
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71 * identifier from the database. |
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72 */ |
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73 public static final String SQL_LOAD_BY_GID = |
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74 SQL.get("artifacts.select.gid"); |
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75 |
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76 /** |
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77 * The SQL statement to get the database id of an artifact |
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78 * identified by the identifier. |
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79 */ |
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80 public static final String SQL_GET_ID = |
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81 SQL.get("artifacts.get.id"); |
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82 |
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83 /** |
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84 * The SQL statement to replace the content of an |
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85 * existing artifact inside the database. |
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86 */ |
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87 public static final String SQL_REPLACE = |
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88 SQL.get("artifacts.replace"); |
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89 |
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90 // USER SQL |
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91 |
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92 public static final String SQL_USERS_NEXT_ID = |
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93 SQL.get("users.id.nextval"); |
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94 |
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95 public static final String SQL_USERS_INSERT = |
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96 SQL.get("users.insert"); |
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97 |
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98 public static final String SQL_USERS_SELECT_ID_BY_GID = |
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99 SQL.get("users.select.id.by.gid"); |
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100 |
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101 public static final String SQL_USERS_SELECT_GID = |
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102 SQL.get("users.select.gid"); |
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103 |
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104 public static final String SQL_USERS_DELETE_ID = |
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105 SQL.get("users.delete.id"); |
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106 |
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107 public static final String SQL_USERS_DELETE_COLLECTIONS = |
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108 SQL.get("users.delete.collections"); |
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109 |
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110 public static final String SQL_USERS_SELECT_ALL = |
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111 SQL.get("users.select.all"); |
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112 |
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113 public static final String SQL_USERS_COLLECTIONS = |
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114 SQL.get("users.collections"); |
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115 |
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116 public static final String SQL_USERS_COLLECTION_IDS = |
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117 SQL.get("users.collection.ids"); |
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118 |
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119 public static final String SQL_USERS_DELETE_ALL_COLLECTIONS = |
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120 SQL.get("users.delete.all.collections"); |
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121 |
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122 public static final String SQL_ARTIFACTS_IN_ONLY_COLLECTION_ONLY = |
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123 SQL.get("artifacts.in.one.collection.only"); |
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124 |
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125 public static final String SQL_OUTDATE_ARTIFACTS_COLLECTION = |
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126 SQL.get("outdate.artifacts.collection"); |
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127 |
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128 public static final String SQL_OUTDATE_ARTIFACTS_USER = |
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129 SQL.get("outdate.artifacts.user"); |
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130 |
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131 public static final String SQL_DELETE_USER_COLLECTION_ITEMS = |
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132 SQL.get("delete.user.collection.items"); |
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133 |
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134 public static final String SQL_COLLECTIONS_NEXT_ID = |
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135 SQL.get("collections.id.nextval"); |
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136 |
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137 public static final String SQL_COLLECTIONS_INSERT = |
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138 SQL.get("collections.insert"); |
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139 |
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140 public static final String SQL_COLLECTIONS_SELECT_USER = |
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141 SQL.get("collections.select.user"); |
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142 |
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143 public static final String SQL_COLLECTIONS_SELECT_ALL = |
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144 SQL.get("collections.select.all"); |
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145 |
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146 public static final String SQL_COLLECTIONS_CREATION_TIME = |
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147 SQL.get("collection.creation.time"); |
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148 |
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149 public static final String SQL_COLLECTIONS_ID_BY_GID = |
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150 SQL.get("collection.creation.time"); |
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151 |
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152 public static final String SQL_DELETE_COLLECTION_ITEMS = |
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153 SQL.get("delete.collection.items"); |
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154 |
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155 public static final String SQL_DELETE_COLLECTION = |
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156 SQL.get("delete.collection"); |
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157 |
176
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158 public static final String SQL_COLLECTION_CHECK_ARTIFACT = |
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159 SQL.get("collection.check.artifact"); |
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160 |
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161 public static final String SQL_COLLECTION_ITEMS_ID_NEXTVAL = |
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162 SQL.get("collection.check.artifact"); |
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163 |
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164 public static final String SQL_COLLECTION_ITEMS_INSERT = |
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165 SQL.get("collection.items.insert"); |
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166 |
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167 /** The singleton.*/ |
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168 protected static Backend instance; |
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169 |
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170 /** |
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171 * The database cleaner. Reference is stored here because |
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172 * the cleaner is woken up if the backend finds an outdated |
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173 * artifact. This artifact should be removed as soon as |
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174 * possible. |
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175 */ |
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176 protected DatabaseCleaner cleaner; |
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177 |
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178 /** |
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179 * To revive an artifact from the bytes coming from the database |
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180 * we need the artifact factory which references the artifact |
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181 * serializer which is able to do the reviving job. |
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182 */ |
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183 protected FactoryLookup factoryLookup; |
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184 |
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185 /** |
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186 * Little helper interface to decouple the ArtifactDatabase |
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187 * from the Backend. A ArtifactDatabase should depend on a |
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188 * Backend but a Backend not from an ArtifactDatabase. |
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189 */ |
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190 public interface FactoryLookup { |
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191 |
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192 /** |
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193 * Returns an ArtifactFactory which is bound to a given name. |
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194 * @param factoryName The name of the artifact factory. |
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195 * @return The ArtifactFactory bound to the factory name or |
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196 * null if not matching factory is found. |
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197 */ |
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198 ArtifactFactory getArtifactFactory(String factoryName); |
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199 |
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200 } // interface FactoryLookup |
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201 |
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202 /** |
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203 * Inner class that brigdes between the persisten form of the |
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204 * artifact and the living one inside the artifact database. |
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205 * After the describe(), feed(), advance() and out() operations |
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206 * of the artifact it must be possible to write to modified artifact |
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207 * back into the database. |
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208 */ |
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209 public final class PersistentArtifact |
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210 extends Id |
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211 { |
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212 private Artifact artifact; |
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213 private ArtifactSerializer serializer; |
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214 private Long ttl; |
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215 |
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216 /** |
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217 * Cronstructor to create a persistent artifact. |
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218 * @param artifact The living artifact. |
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219 * @param serializer The serializer to store the artifact |
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220 * after the operations. |
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221 * @param ttl The time to life of the artifact. |
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222 * @param id The database id of the artifact. |
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223 */ |
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224 public PersistentArtifact( |
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225 Artifact artifact, |
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226 ArtifactSerializer serializer, |
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227 Long ttl, |
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228 int id |
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229 ) { |
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230 super(id); |
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231 this.artifact = artifact; |
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232 this.serializer = serializer; |
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233 this.ttl = ttl; |
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234 } |
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235 |
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236 /** |
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237 * Returns the wrapped living artifact. |
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238 * @return the living artifact. |
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239 */ |
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240 public Artifact getArtifact() { |
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241 return artifact; |
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242 } |
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243 |
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244 /** |
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245 * Returns the serialized which is able to write a |
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246 * modified artifact back into the database. |
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247 * @return The serializer. |
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248 */ |
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249 public ArtifactSerializer getSerializer() { |
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250 return serializer; |
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251 } |
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252 |
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253 /** |
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254 * The time to life of the artifact. |
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255 * @return The time to live. |
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256 */ |
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257 public Long getTTL() { |
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258 return ttl; |
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259 } |
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260 |
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261 /** |
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262 * Stores the living artifact back into the database. |
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263 */ |
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264 public void store() { |
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265 if (logger.isDebugEnabled()) { |
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266 logger.debug("storing artifact id = " + getId()); |
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267 } |
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268 Backend.this.store(this); |
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269 } |
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270 |
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271 /** |
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272 * Only touches the access time of the artifact. |
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273 */ |
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274 public void touch() { |
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275 if (logger.isDebugEnabled()) { |
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276 logger.debug("touching artifact id = " + getId()); |
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277 } |
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278 Backend.this.touch(this); |
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279 } |
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280 } // class ArtifactWithId |
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281 |
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282 /** |
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283 * Default constructor |
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284 */ |
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285 public Backend() { |
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286 } |
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287 |
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288 /** |
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289 * Constructor to create a backend with a link to the database cleaner. |
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290 * @param cleaner The clean which periodically removes outdated |
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291 * artifacts from the database. |
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292 */ |
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293 public Backend(DatabaseCleaner cleaner) { |
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294 this.cleaner = cleaner; |
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295 } |
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296 |
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297 |
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298 /** |
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299 * Returns the singleton of this Backend. |
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300 * |
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301 * @return the backend. |
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302 */ |
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303 public static synchronized Backend getInstance() { |
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304 if (instance == null) { |
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305 instance = new Backend(); |
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306 } |
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307 |
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308 return instance; |
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309 } |
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310 |
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311 /** |
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312 * Sets the factory lookup mechanism to decouple ArtifactDatabase |
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313 * and Backend. |
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314 * @param factoryLookup |
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315 */ |
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316 public void setFactoryLookup(FactoryLookup factoryLookup) { |
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317 this.factoryLookup = factoryLookup; |
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318 } |
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319 |
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320 /** |
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321 * Sets the database cleaner explicitly. |
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322 * @param cleaner The database cleaner |
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323 */ |
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324 public void setCleaner(DatabaseCleaner cleaner) { |
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325 this.cleaner = cleaner; |
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326 } |
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327 |
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328 /** |
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329 * Returns a new unique identifier to external identify |
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330 * the artifact across the system. This implementation |
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331 * uses random UUIDs v4 to achieve this target. |
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332 * @return the new identifier |
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333 */ |
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334 public String newIdentifier() { |
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335 // TODO: check database for collisions. |
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336 return StringUtils.newUUID(); |
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337 } |
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338 |
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339 public boolean isValidIdentifier(String identifier) { |
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340 return StringUtils.checkUUID(identifier); |
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341 } |
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342 |
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343 /** |
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344 * Stores a new artifact into the database. |
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345 * @param artifact The artifact to be stored |
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346 * @param factory The factory which build the artifact |
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347 * @param ttl The initial time to life of the artifact. |
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348 * @return A persistent wrapper around the living |
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349 * artifact to be able to write modification later. |
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350 * @throws Exception Thrown if something went wrong with the |
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351 * storage process. |
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352 */ |
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353 public PersistentArtifact storeInitially( |
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354 Artifact artifact, |
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355 ArtifactFactory factory, |
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356 Long ttl |
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357 ) |
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358 throws Exception |
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359 { |
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360 return new PersistentArtifact( |
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361 artifact, |
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362 factory.getSerializer(), |
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363 ttl, |
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364 insertDatabase(artifact, factory, ttl)); |
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365 } |
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366 |
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367 /** |
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368 * Stores an artifact into database if it does not exist there. |
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369 * If it exists there it is only updated. |
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370 * @param artifact The artifact to store/update. |
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371 * @param factory The factory which created the artifact. |
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372 * @param ttl The initial time to live of the artifact. |
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373 * @return A persistent version of the artifact to be able |
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374 * to store a modification later. |
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375 * @throws Exception Thrown if something went wrong during |
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376 * storing/updating. |
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377 */ |
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378 public PersistentArtifact storeOrReplace( |
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379 Artifact artifact, |
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380 ArtifactFactory factory, |
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381 Long ttl |
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382 ) |
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383 throws Exception |
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384 { |
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385 return new PersistentArtifact( |
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386 artifact, |
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387 factory.getSerializer(), |
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388 ttl, |
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389 storeOrReplaceDatabase(artifact, factory, ttl)); |
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390 } |
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391 |
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392 /** |
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393 * Implementors of this interface are able to process the raw |
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394 * artifact data from the database for loading. |
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395 */ |
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396 public interface ArtifactLoader { |
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397 |
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398 /** |
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399 * Creates a custom object from the raw artifact database data. |
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400 * @param factory The factory that created this artifact. |
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401 * @param ttl The current time to life of the artifact. |
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402 * @param bytes The raw artifact bytes from the database. |
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403 * @param id The database id of the artifact. |
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404 * @return The custom object created by the implementation. |
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405 */ |
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406 Object load(ArtifactFactory factory, Long ttl, byte [] bytes, int id); |
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407 |
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408 } // interface ArtifactLoader |
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409 |
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410 /** |
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411 * Fetches an artifact from the database identified by the |
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412 * given identifier. |
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413 * @param identifer The identifier of the artifact. |
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414 * @return A persistent wrapper around the found artifact |
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415 * to be able to write back a modifaction later or null |
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416 * if no artifact is found for this identifier. |
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417 */ |
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418 public PersistentArtifact getArtifact(String identifer) { |
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419 |
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420 return (PersistentArtifact)loadArtifact( |
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421 identifer, |
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422 new ArtifactLoader() { |
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423 |
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424 public Object load( |
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425 ArtifactFactory factory, |
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426 Long ttl, |
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427 byte [] bytes, |
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428 int id |
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429 ) { |
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430 ArtifactSerializer serializer = factory.getSerializer(); |
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431 |
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432 Artifact artifact = serializer.fromBytes(bytes); |
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433 |
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434 return artifact == null |
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435 ? null |
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436 : new PersistentArtifact(artifact, serializer, ttl, id); |
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437 } |
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438 }); |
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439 } |
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440 |
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441 /** |
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442 * More general loading mechanism for artifacts. The concrete |
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443 * load processing is delegated to the given loader. |
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444 * @param identifer The identifier of the artifact. |
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445 * @param loader The loader which processes the raw database data. |
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446 * @return The object created by the loader. |
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447 */ |
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448 public Object loadArtifact( |
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449 final String identifer, |
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450 final ArtifactLoader loader |
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451 ) { |
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452 if (!isValidIdentifier(identifer)) { |
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453 return null; |
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454 } |
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455 |
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456 final Object [] loaded = new Object[1]; |
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457 |
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458 SQLExecutor exec = new SQLExecutor() { |
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459 public boolean doIt() throws SQLException { |
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460 prepareStatement(SQL_LOAD_BY_GID); |
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461 stmnt.setString(1, identifer); |
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462 |
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463 result = stmnt.executeQuery(); |
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464 |
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465 if (!result.next()) { |
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466 return false; |
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467 } |
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468 |
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469 int id = result.getInt(1); |
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470 long ttlX = result.getLong(3); |
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471 |
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472 Long ttl = result.wasNull() ? null : Long.valueOf(ttlX); |
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473 |
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474 if (ttl != null) { // real time to life |
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475 long last_access = result.getTimestamp(2).getTime(); |
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476 if (last_access + ttlX < System.currentTimeMillis()) { |
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477 artifactOutdated(id); |
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478 return false; |
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479 } |
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480 } |
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481 |
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482 String factoryName = result.getString(4); |
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483 |
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484 if (factoryLookup == null) { |
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485 logger.error("factory lookup == null"); |
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486 return false; |
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487 } |
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488 |
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489 ArtifactFactory factory = factoryLookup |
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490 .getArtifactFactory(factoryName); |
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491 |
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492 if (factory == null) { |
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493 logger.error("factory '" + factoryName + "' not found"); |
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494 return false; |
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495 } |
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496 |
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497 byte [] bytes = result.getBytes(5); |
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498 |
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499 loaded[0] = loader.load(factory, ttl, bytes, id); |
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500 return true; |
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501 } |
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502 }; |
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503 |
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504 return exec.runRead() ? loaded[0] : null; |
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505 } |
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506 |
90
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507 /** |
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508 * Called if the load mechanism found an outdated artifact. |
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509 * It wakes up the database cleaner. |
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510 * @param id The id of the outdated artifact. |
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511 */ |
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512 protected void artifactOutdated(int id) { |
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513 if (logger.isDebugEnabled()) { |
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514 logger.info("artifactOutdated: id = " + id); |
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515 } |
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516 if (cleaner != null) { |
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517 cleaner.wakeup(); |
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518 } |
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519 } |
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520 |
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521 public Artifact reviveArtifact(String factoryName, byte [] bytes) { |
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522 if (factoryLookup == null) { |
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523 logger.error("reviveArtifact: factory lookup == null"); |
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524 return null; |
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525 } |
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526 ArtifactFactory factory = factoryLookup |
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527 .getArtifactFactory(factoryName); |
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528 |
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529 if (factory == null) { |
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530 logger.error( |
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531 "reviveArtifact: no factory '" + factoryName + "' found"); |
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532 return null; |
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533 } |
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534 |
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535 ArtifactSerializer serializer = factory.getSerializer(); |
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536 |
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537 return serializer.fromBytes(bytes); |
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538 } |
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539 |
90
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540 /** |
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541 * Internal method to store/replace an artifact inside the database. |
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542 * If an artifact with the given identifier does not exists it is |
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543 * created else only the content data is updated. |
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544 * @param artifact The artifact to be store/update inside the database. |
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545 * @param factory The factory that created the artifact. |
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546 * @param ttl The initial time to life of the artifact. |
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547 * @return The database id of the stored/updated artifact. |
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548 */ |
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549 protected int storeOrReplaceDatabase( |
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550 final Artifact artifact, |
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551 final ArtifactFactory factory, |
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552 final Long ttl |
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553 ) { |
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554 final String uuid = artifact.identifier(); |
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555 |
177
77cd37a93fca
Backend: isIdentifierValid more symmetric to new newIndentifier
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556 if (!isValidIdentifier(uuid)) { |
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557 throw new RuntimeException("No valid UUID"); |
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558 } |
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559 |
174
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560 final int [] id = new int[1]; |
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561 |
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562 SQLExecutor exec = new SQLExecutor() { |
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563 public boolean doIt() throws SQLException { |
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564 |
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565 prepareStatement(SQL_GET_ID); |
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566 stmnt.setString(1, uuid); |
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567 result = stmnt.executeQuery(); |
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568 |
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569 Integer ID = result.next() |
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570 ? Integer.valueOf(result.getInt(1)) |
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571 : null; |
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572 |
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573 reset(); |
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574 |
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575 if (ID != null) { // already in database |
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576 prepareStatement(SQL_REPLACE); |
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577 |
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578 if (ttl == null) { |
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579 stmnt.setNull(1, Types.BIGINT); |
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580 } |
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581 else { |
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582 stmnt.setLong(1, ttl.longValue()); |
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583 } |
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584 |
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585 stmnt.setString(2, factory.getName()); |
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586 stmnt.setBytes( |
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587 3, |
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588 factory.getSerializer().toBytes(artifact)); |
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589 id[0] = ID.intValue(); |
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590 stmnt.setInt(4, id[0]); |
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591 } |
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592 else { // new artifact |
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593 prepareStatement(SQL_NEXT_ID); |
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594 result = stmnt.executeQuery(); |
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595 |
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596 if (!result.next()) { |
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597 logger.error("No id generated"); |
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598 return false; |
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599 } |
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600 |
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601 reset(); |
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602 |
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603 prepareStatement(SQL_INSERT); |
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604 |
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605 id[0] = result.getInt(1); |
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606 stmnt.setInt(1, id[0]); |
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607 stmnt.setString(2, uuid); |
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608 if (ttl == null) { |
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609 stmnt.setNull(3, Types.BIGINT); |
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610 } |
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611 else { |
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612 stmnt.setLong(3, ttl.longValue()); |
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613 } |
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614 |
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615 stmnt.setString(4, factory.getName()); |
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616 |
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617 stmnt.setBytes( |
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618 5, |
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619 factory.getSerializer().toBytes(artifact)); |
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620 } |
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621 stmnt.execute(); |
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622 conn.commit(); |
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623 return true; |
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624 } |
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625 }; |
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626 |
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627 if (!exec.runWrite()) { |
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628 throw new RuntimeException("failed insert artifact into database"); |
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629 } |
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630 |
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631 return id[0]; |
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632 } |
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633 |
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634 /** |
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635 * Internal method to store an artifact inside the database. |
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636 * @param artifact The artifact to be stored. |
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637 * @param factory The factory which created the artifact. |
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638 * @param ttl The initial time to live of the artifact. |
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639 * @return The database id of the stored artifact. |
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640 */ |
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641 protected int insertDatabase( |
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642 final Artifact artifact, |
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643 final ArtifactFactory factory, |
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644 final Long ttl |
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645 ) { |
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646 final int [] id = new int[1]; |
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647 |
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648 SQLExecutor exec = new SQLExecutor() { |
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649 public boolean doIt() throws SQLException { |
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650 prepareStatement(SQL_NEXT_ID); |
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651 result = stmnt.executeQuery(); |
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652 |
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653 if (!result.next()) { |
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654 logger.error("No id generated"); |
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655 return false; |
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656 } |
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657 |
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658 id[0] = result.getInt(1); |
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659 |
174
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660 reset(); |
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661 prepareStatement(SQL_INSERT); |
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662 |
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663 String uuid = artifact.identifier(); |
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664 stmnt.setInt(1, id[0]); |
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665 stmnt.setString(2, uuid); |
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666 if (ttl == null) { |
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667 stmnt.setNull(3, Types.BIGINT); |
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668 } |
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669 else { |
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670 stmnt.setLong(3, ttl.longValue()); |
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671 } |
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672 |
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673 stmnt.setString(4, factory.getName()); |
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674 |
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675 stmnt.setBytes( |
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676 5, |
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677 factory.getSerializer().toBytes(artifact)); |
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678 |
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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|
679 stmnt.execute(); |
14
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680 |
174
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681 conn.commit(); |
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682 return true; |
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683 } |
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684 }; |
14
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685 |
174
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686 if (!exec.runWrite()) { |
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Reduce the code repetition and the complexity of the backend.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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687 throw new RuntimeException("failed insert artifact into database"); |
14
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688 } |
174
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689 |
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Reduce the code repetition and the complexity of the backend.
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690 return id[0]; |
14
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|
691 } |
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diff
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692 |
90
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More javadoc.
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|
693 /** |
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694 * Touches the access timestamp of a given artifact to prevent |
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More javadoc.
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diff
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695 * that it will be removed from the database by the database cleaner. |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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696 * @param artifact The persistent wrapper around the living artifact. |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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|
697 */ |
174
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698 public void touch(final PersistentArtifact artifact) { |
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699 new SQLExecutor() { |
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700 public boolean doIt() throws SQLException { |
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701 prepareStatement(SQL_TOUCH); |
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702 stmnt.setInt(1, artifact.getId()); |
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703 stmnt.execute(); |
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704 conn.commit(); |
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705 return true; |
14
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706 } |
174
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707 }.runWrite(); |
14
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|
708 } |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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|
709 |
90
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More javadoc.
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diff
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|
710 /** |
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parents:
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711 * Writes modification of an artifact back to the database. |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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712 * @param artifact The persistent wrapper around a living |
68285f7bc476
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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713 * artifact. |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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714 */ |
174
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715 public void store(final PersistentArtifact artifact) { |
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716 new SQLExecutor() { |
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717 public boolean doIt() throws SQLException { |
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718 prepareStatement(SQL_UPDATE); |
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719 stmnt.setInt(2, artifact.getId()); |
26
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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720 |
174
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721 byte [] bytes = artifact |
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722 .getSerializer() |
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723 .toBytes(artifact.getArtifact()); |
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724 |
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725 stmnt.setBytes(1, bytes); |
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726 stmnt.execute(); |
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727 conn.commit(); |
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728 return true; |
26
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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|
729 } |
174
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730 }.runWrite(); |
14
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|
731 } |
133
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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|
732 |
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parents:
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|
733 public User createUser( |
174
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734 final String name, |
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735 final Document role, |
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736 final UserFactory factory, |
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737 final Object context |
133
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parents:
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|
738 ) { |
174
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739 final User [] user = new User[1]; |
138
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740 |
174
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|
741 SQLExecutor exec = new SQLExecutor() { |
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742 public boolean doIt() throws SQLException { |
138
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743 |
174
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|
744 prepareStatement(SQL_USERS_NEXT_ID); |
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745 result = stmnt.executeQuery(); |
138
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746 |
146
967dc552455d
Enable backend to delete users
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|
747 if (!result.next()) { |
174
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|
748 return false; |
138
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|
749 } |
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Call database to create a new user.
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|
750 |
145
c0d025df722d
Enable backend to delete users
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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|
751 int id = result.getInt(1); |
138
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|
752 |
174
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|
753 reset(); |
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754 |
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|
755 String identifier = newIdentifier(); |
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|
756 |
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Reduce the code repetition and the complexity of the backend.
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|
757 prepareStatement(SQL_USERS_INSERT); |
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|
758 |
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|
759 stmnt.setInt(1, id); |
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|
760 stmnt.setString(2, identifier); |
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|
761 stmnt.setString(3, name); |
138
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|
762 |
b90e831d3dfe
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|
763 byte [] roleData = role == null |
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|
764 ? null |
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765 : XMLUtils.toByteArray(role); |
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|
766 |
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|
767 if (roleData == null) { |
174
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|
768 stmnt.setNull(4, Types.BIGINT); |
138
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769 } |
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|
770 else { |
174
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|
771 stmnt.setBytes(4, roleData); |
138
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|
772 } |
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|
773 |
174
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|
774 stmnt.execute(); |
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|
775 conn.commit(); |
138
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|
776 |
174
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|
777 user[0] = factory.createUser( |
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|
778 identifier, name, role, context); |
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|
779 return true; |
138
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|
780 } |
174
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|
781 }; |
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|
782 |
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|
783 return exec.runWrite() ? user[0] : null; |
133
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|
784 } |
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Fixed typo in keys.
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|
785 |
174
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|
786 public boolean deleteUser(final String identifier) { |
144
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|
787 |
177
77cd37a93fca
Backend: isIdentifierValid more symmetric to new newIndentifier
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|
788 if (!isValidIdentifier(identifier)) { |
154
1a72f08ce8d7
Propagate delete user errors correctly.
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|
789 return false; |
147
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790 } |
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791 |
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792 SQLExecutor exec = new SQLExecutor() { |
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793 public boolean doIt() throws SQLException { |
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794 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
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795 |
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796 stmnt.setString(1, identifier); |
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797 result = stmnt.executeQuery(); |
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798 |
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799 if (!result.next()) { // No such user |
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800 return false; |
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801 } |
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802 |
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803 int id = result.getInt(1); |
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804 |
174
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805 reset(); |
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806 |
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807 // outdate the artifacts exclusively used by the user |
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808 |
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809 prepareStatement(SQL_OUTDATE_ARTIFACTS_USER); |
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810 stmnt.setInt(1, id); |
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811 stmnt.setInt(2, id); |
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812 stmnt.execute(); |
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813 |
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814 reset(); |
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815 |
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816 // delete the collection items of the user |
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817 |
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818 prepareStatement(SQL_DELETE_USER_COLLECTION_ITEMS); |
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819 stmnt.setInt(1, id); |
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820 stmnt.execute(); |
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821 |
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822 reset(); |
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823 |
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824 // delete the collections of the user |
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825 |
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826 prepareStatement(SQL_USERS_DELETE_COLLECTIONS); |
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827 stmnt.setInt(1, id); |
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828 stmnt.execute(); |
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829 |
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830 reset(); |
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831 |
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832 // delete the user |
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833 |
174
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834 prepareStatement(SQL_USERS_DELETE_ID); |
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835 stmnt.setInt(1, id); |
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836 stmnt.execute(); |
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837 |
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838 conn.commit(); |
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839 return true; |
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840 } |
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841 }; |
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842 |
174
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843 return exec.runWrite(); |
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844 } |
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845 |
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846 public User getUser( |
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847 final String identifier, |
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848 final UserFactory factory, |
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849 final Object context |
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850 ) { |
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851 if (!isValidIdentifier(identifier)) { |
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852 logger.debug("Invalid UUID: '" + identifier + "'"); |
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853 return null; |
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854 } |
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855 |
174
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856 final User [] user = new User[1]; |
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857 |
174
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858 SQLExecutor exec = new SQLExecutor() { |
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859 public boolean doIt() throws SQLException { |
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860 prepareStatement(SQL_USERS_SELECT_GID); |
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861 stmnt.setString(1, identifier); |
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862 result = stmnt.executeQuery(); |
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863 if (!result.next()) { // no such user |
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864 return false; |
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865 } |
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866 // omit id |
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867 String name = result.getString(2); |
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868 byte [] roleData = result.getBytes(3); |
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869 |
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870 Document role = XMLUtils.fromByteArray(roleData); |
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871 |
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872 user[0] = factory.createUser( |
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873 identifier, name, role, context); |
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874 return true; |
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875 } |
174
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876 }; |
147
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877 |
174
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878 return exec.runRead() ? user[0] : null; |
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879 } |
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880 |
174
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881 public User [] getUsers( |
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882 final UserFactory factory, |
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883 final Object context |
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884 ) { |
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885 final ArrayList<User> users = new ArrayList<User>(); |
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886 |
174
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887 SQLExecutor exec = new SQLExecutor() { |
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888 public boolean doIt() throws SQLException { |
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889 prepareStatement(SQL_USERS_SELECT_ALL); |
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890 result = stmnt.executeQuery(); |
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891 |
174
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892 while (result.next()) { |
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893 // omit id |
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894 String identifier = result.getString(2); |
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895 String name = result.getString(3); |
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896 byte [] roleData = result.getBytes(4); |
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897 |
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898 Document role = XMLUtils.fromByteArray(roleData); |
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899 User user = factory.createUser( |
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900 identifier, name, role, context); |
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901 users.add(user); |
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902 } |
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903 return true; |
148
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|
904 } |
174
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|
905 }; |
148
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|
906 |
174
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|
907 return exec.runRead() |
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908 ? users.toArray(new User[users.size()]) |
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|
909 : null; |
133
2950c6011afa
Fixed typo in keys.
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diff
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|
910 } |
156
a76de72ad6d1
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|
911 |
159
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|
912 public ArtifactCollection createCollection( |
174
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913 final String ownerIdentifier, |
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914 final String name, |
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915 final ArtifactCollectionFactory factory, |
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916 final Document data, |
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|
917 final Object context |
159
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918 ) { |
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|
919 if (name == null) { |
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920 logger.debug("Name is null"); |
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921 return null; |
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|
922 } |
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|
923 |
177
77cd37a93fca
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diff
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924 if (!isValidIdentifier(ownerIdentifier)) { |
159
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925 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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926 return null; |
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|
927 } |
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|
928 |
174
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929 final ArtifactCollection [] collection = |
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930 new ArtifactCollection[1]; |
159
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931 |
174
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932 SQLExecutor exec = new SQLExecutor() { |
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933 public boolean doIt() throws SQLException { |
159
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934 // fetch owner id |
174
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935 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
159
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936 stmnt.setString(1, ownerIdentifier); |
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937 result = stmnt.executeQuery(); |
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938 |
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939 if (!result.next()) { // no such user |
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940 return false; |
159
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|
941 } |
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|
942 |
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943 int ownerId = result.getInt(1); |
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|
944 reset(); |
159
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|
945 |
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|
946 // fetch new collection seq number. |
174
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947 prepareStatement(SQL_COLLECTIONS_NEXT_ID); |
159
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|
948 result = stmnt.executeQuery(); |
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|
949 |
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|
950 if (!result.next()) { // no identifier generated |
174
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|
951 return false; |
159
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|
952 } |
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|
953 |
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|
954 int id = result.getInt(1); |
174
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|
955 reset(); |
159
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|
956 |
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|
957 String identifier = newIdentifier(); |
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|
958 |
174
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959 prepareStatement(SQL_COLLECTIONS_INSERT); |
159
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|
960 |
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|
961 stmnt.setInt(1, id); |
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|
962 stmnt.setString(2, identifier); |
161
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|
963 stmnt.setString(3, name); |
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|
964 stmnt.setInt(4, ownerId); |
159
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|
965 |
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|
966 // XXX: A bit odd: we don't have a collection, yet. |
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967 Long ttl = factory.timeToLiveUntouched(null, context); |
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|
968 |
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|
969 if (ttl == null) { |
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970 stmnt.setNull(5, Types.BIGINT); |
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|
971 } |
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|
972 else { |
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|
973 stmnt.setLong(5, ttl); |
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|
974 } |
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|
975 |
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|
976 stmnt.execute(); |
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|
977 conn.commit(); |
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|
978 |
174
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|
979 reset(); |
170
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|
980 |
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|
981 // fetch creation time from database |
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|
982 // done this way to use the time system |
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|
983 // of the database. |
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|
984 |
174
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|
985 prepareStatement(SQL_COLLECTIONS_CREATION_TIME); |
170
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|
986 stmnt.setInt(1, id); |
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|
987 |
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|
988 result = stmnt.executeQuery(); |
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|
989 |
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|
990 Date creationTime = null; |
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|
991 |
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|
992 if (result.next()) { |
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993 Timestamp timestamp = result.getTimestamp(1); |
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|
994 creationTime = new Date(timestamp.getTime()); |
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|
995 } |
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|
996 |
174
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|
997 collection[0] = factory.createCollection( |
170
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|
998 identifier, name, creationTime, data, context); |
174
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|
999 |
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|
1000 return true; |
159
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|
1001 } |
174
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|
1002 }; |
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1003 |
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1004 return exec.runWrite() ? collection[0]: null; |
156
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|
1005 } |
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|
1006 |
164
268c2972d4a7
Implemented the interface method listCollections() in the artifact database.
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|
1007 public ArtifactCollection [] listCollections( |
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1008 final String ownerIdentifier, |
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1009 final Document data, |
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1010 final ArtifactCollectionFactory collectionFactory, |
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1011 final UserFactory userFactory, |
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1012 final Object context |
167
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|
1013 ) { |
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1014 if (ownerIdentifier != null |
177
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1015 && !isValidIdentifier(ownerIdentifier)) { |
167
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1016 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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1017 return null; |
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1018 } |
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1019 |
174
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1020 final ArrayList<ArtifactCollection> collections = |
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1021 new ArrayList<ArtifactCollection>(); |
167
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1022 |
174
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1023 SQLExecutor exec = new SQLExecutor() { |
167
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1024 |
174
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1025 public boolean doIt() throws SQLException { |
167
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1026 |
174
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1027 if (ownerIdentifier != null) { |
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1028 prepareStatement(SQL_COLLECTIONS_SELECT_USER); |
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1029 stmnt.setString(1, ownerIdentifier); |
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1030 } |
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1031 else { |
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1032 prepareStatement(SQL_COLLECTIONS_SELECT_ALL); |
167
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1033 } |
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1034 |
174
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1035 result = stmnt.executeQuery(); |
167
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1036 |
174
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1037 while (result.next()) { |
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1038 String collectionIdentifier = result.getString(1); |
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1039 String collectionName = result.getString(2); |
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1040 Date creationTime = |
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1041 new Date(result.getTimestamp(3).getTime()); |
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1042 String userIdentifier = result.getString(4); |
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1043 |
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1044 ArtifactCollection collection = |
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1045 collectionFactory.createCollection( |
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1046 collectionIdentifier, |
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1047 collectionName, |
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1048 creationTime, |
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1049 data, |
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1050 context); |
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1051 |
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1052 if (userIdentifier != null) { |
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1053 collection.setUser(new LazyBackendUser( |
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1054 userIdentifier, userFactory, Backend.this, context)); |
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1055 } |
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1056 |
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1057 collections.add(collection); |
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1058 } |
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1059 return true; |
167
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1060 } |
174
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1061 }; |
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1062 |
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1063 return exec.runRead() |
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1064 ? collections.toArray(new ArtifactCollection[collections.size()]) |
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1065 : null; |
156
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1066 } |
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1067 |
174
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1068 |
175
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1069 public boolean deleteCollection(final String collectionId) { |
177
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1070 if (!isValidIdentifier(collectionId)) { |
175
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1071 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1072 return false; |
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1073 } |
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1074 SQLExecutor exec = new SQLExecutor() { |
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1075 public boolean doIt() throws SQLException { |
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1076 // fetch collection id |
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1077 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1078 stmnt.setString(1, collectionId); |
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1079 result = stmnt.executeQuery(); |
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1080 if (!result.next()) { |
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1081 logger.debug("No such collection: " + collectionId); |
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1082 return false; |
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1083 } |
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1084 int id = result.getInt(1); |
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1085 reset(); |
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1086 |
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1087 // outdate artifacts that are only in this collection |
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1088 prepareStatement(SQL_OUTDATE_ARTIFACTS_COLLECTION); |
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1089 stmnt.setInt(1, id); |
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1090 stmnt.setInt(2, id); |
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1091 stmnt.execute(); |
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1092 reset(); |
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1093 |
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1094 // delete the collection items |
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1095 prepareStatement(SQL_DELETE_COLLECTION_ITEMS); |
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1096 stmnt.setInt(1, id); |
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1097 stmnt.execute(); |
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1098 reset(); |
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1099 |
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1100 // delete the collection |
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1101 prepareStatement(SQL_DELETE_COLLECTION); |
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1102 stmnt.setInt(1, id); |
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1103 stmnt.execute(); |
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1104 conn.commit(); |
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1105 return true; |
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1106 } |
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1107 }; |
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1108 return exec.runWrite(); |
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1109 } |
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1110 |
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1111 public Document getCollectionAttribute( |
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1112 String collectionId, |
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1113 String artifactId |
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1114 ) { |
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1115 // TODO: Implement me! |
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1116 return null; |
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1117 } |
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1118 |
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1119 public boolean setCollectionAttribute( |
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1120 String collectionId, |
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1121 String artifactId, |
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1122 Document attribute |
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1123 ) { |
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1124 // TODO: Implement me! |
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1125 return false; |
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1126 } |
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1127 |
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1128 public boolean addCollectionArtifact( |
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1129 final String collectionId, |
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1130 final String artifactId, |
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1131 final Document attribute |
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1132 ) { |
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1133 if (!isValidIdentifier(collectionId)) { |
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1134 logger.debug("Invalid collection id: '" + collectionId + "'"); |
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1135 return false; |
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1136 } |
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1137 |
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1138 if (!isValidIdentifier(artifactId)) { |
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1139 logger.debug("Invalid artifact id: '" + artifactId + "'"); |
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1140 return false; |
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1141 } |
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1142 |
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1143 SQLExecutor exec = new SQLExecutor() { |
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1144 public boolean doIt() throws SQLException { |
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1145 // fetch artifact id |
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1146 prepareStatement(SQL_GET_ID); |
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1147 stmnt.setString(1, artifactId); |
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1148 result = stmnt.executeQuery(); |
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1149 if (!result.next()) { |
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1150 logger.debug("No such artifact: " + artifactId); |
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1151 return false; |
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1152 } |
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1153 int aid = result.getInt(1); |
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1154 reset(); |
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1155 |
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1156 // fetch collection id |
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1157 prepareStatement(SQL_COLLECTIONS_ID_BY_GID); |
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1158 stmnt.setString(1, collectionId); |
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1159 result = stmnt.executeQuery(); |
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1160 if (!result.next()) { |
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1161 logger.debug("No such collection: " + collectionId); |
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1162 } |
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1163 int cid = result.getInt(1); |
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1164 reset(); |
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1165 |
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1166 // check if artifact is already in collection |
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1167 prepareStatement(SQL_COLLECTION_CHECK_ARTIFACT); |
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1168 stmnt.setInt(1, aid); |
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1169 stmnt.setInt(2, cid); |
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1170 result = stmnt.executeQuery(); |
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1171 if (result.next()) { |
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1172 logger.debug("artifact already in collection"); |
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1173 return false; |
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1174 } |
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1175 reset(); |
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1176 |
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1177 // fetch fresh id for new collection item |
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1178 prepareStatement(SQL_COLLECTION_ITEMS_ID_NEXTVAL); |
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1179 result = stmnt.executeQuery(); |
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1180 if (!result.next()) { |
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1181 logger.debug("no collection item id generated"); |
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1182 return false; |
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1183 } |
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1184 int ci_id = result.getInt(1); |
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1185 reset(); |
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1186 |
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1187 // insert new collection item |
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1188 prepareStatement(SQL_COLLECTION_ITEMS_INSERT); |
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1189 stmnt.setInt(1, ci_id); |
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1190 stmnt.setInt(2, cid); |
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1191 stmnt.setInt(3, aid); |
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1192 |
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1193 byte [] data = attribute != null |
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1194 ? XMLUtils.toByteArray(attribute) |
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1195 : null; |
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1196 |
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1197 if (data == null) { |
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1198 stmnt.setNull(4, Types.BINARY); |
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1199 } |
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1200 else { |
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1201 stmnt.setBytes(4, data); |
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1202 } |
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1203 stmnt.execute(); |
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1204 conn.commit(); |
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1205 |
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1206 return true; |
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1207 } |
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1208 }; |
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1209 return exec.runWrite(); |
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1210 } |
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1211 |
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1212 public boolean removeCollectionArtifact( |
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1213 String collectionId, |
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1214 String artifactId |
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1215 ) { |
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1216 // TODO: Implement me! |
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1217 return false; |
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1218 } |
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1219 |
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1220 public ArtifactCollection [] listCollectionArtifacts(String collectionId) { |
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1221 // TODO: Implement me! |
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1222 return null; |
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1223 } |
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1224 |
13
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1225 } |
79
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1226 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |