Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java @ 174:25d472a67a9f
Reduce the code repetition and the complexity of the backend.
artifacts/trunk@1400 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 04 Mar 2011 16:43:03 +0000 |
parents | ac0f8bd97277 |
children | 16e6e661e6bf |
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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 /** The singleton.*/ |
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150 protected static Backend instance; |
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151 |
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152 /** |
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153 * The database cleaner. Reference is stored here because |
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154 * the cleaner is woken up if the backend finds an outdated |
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155 * artifact. This artifact should be removed as soon as |
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156 * possible. |
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157 */ |
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158 protected DatabaseCleaner cleaner; |
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159 |
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160 /** |
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161 * To revive an artifact from the bytes coming from the database |
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162 * we need the artifact factory which references the artifact |
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163 * serializer which is able to do the reviving job. |
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164 */ |
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165 protected FactoryLookup factoryLookup; |
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166 |
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167 /** |
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168 * Little helper interface to decouple the ArtifactDatabase |
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169 * from the Backend. A ArtifactDatabase should depend on a |
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170 * Backend but a Backend not from an ArtifactDatabase. |
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171 */ |
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172 public interface FactoryLookup { |
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173 |
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174 /** |
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175 * Returns an ArtifactFactory which is bound to a given name. |
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176 * @param factoryName The name of the artifact factory. |
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177 * @return The ArtifactFactory bound to the factory name or |
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178 * null if not matching factory is found. |
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179 */ |
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180 ArtifactFactory getArtifactFactory(String factoryName); |
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181 |
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182 } // interface FactoryLookup |
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183 |
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184 /** |
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185 * Inner class that brigdes between the persisten form of the |
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186 * artifact and the living one inside the artifact database. |
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187 * After the describe(), feed(), advance() and out() operations |
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188 * of the artifact it must be possible to write to modified artifact |
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189 * back into the database. |
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190 */ |
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191 public final class PersistentArtifact |
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192 extends Id |
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193 { |
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194 private Artifact artifact; |
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195 private ArtifactSerializer serializer; |
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196 private Long ttl; |
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197 |
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198 /** |
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199 * Cronstructor to create a persistent artifact. |
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200 * @param artifact The living artifact. |
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201 * @param serializer The serializer to store the artifact |
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202 * after the operations. |
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203 * @param ttl The time to life of the artifact. |
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204 * @param id The database id of the artifact. |
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205 */ |
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206 public PersistentArtifact( |
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207 Artifact artifact, |
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208 ArtifactSerializer serializer, |
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209 Long ttl, |
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210 int id |
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211 ) { |
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212 super(id); |
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213 this.artifact = artifact; |
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214 this.serializer = serializer; |
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215 this.ttl = ttl; |
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216 } |
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217 |
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218 /** |
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219 * Returns the wrapped living artifact. |
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220 * @return the living artifact. |
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221 */ |
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222 public Artifact getArtifact() { |
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223 return artifact; |
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224 } |
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225 |
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226 /** |
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227 * Returns the serialized which is able to write a |
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228 * modified artifact back into the database. |
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229 * @return The serializer. |
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230 */ |
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231 public ArtifactSerializer getSerializer() { |
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232 return serializer; |
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233 } |
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234 |
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235 /** |
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236 * The time to life of the artifact. |
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237 * @return The time to live. |
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238 */ |
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239 public Long getTTL() { |
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240 return ttl; |
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241 } |
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242 |
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243 /** |
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244 * Stores the living artifact back into the database. |
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245 */ |
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246 public void store() { |
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247 if (logger.isDebugEnabled()) { |
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248 logger.debug("storing artifact id = " + getId()); |
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249 } |
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250 Backend.this.store(this); |
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251 } |
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252 |
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253 /** |
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254 * Only touches the access time of the artifact. |
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255 */ |
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256 public void touch() { |
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257 if (logger.isDebugEnabled()) { |
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258 logger.debug("touching artifact id = " + getId()); |
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259 } |
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260 Backend.this.touch(this); |
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261 } |
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262 } // class ArtifactWithId |
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263 |
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264 /** |
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265 * Default constructor |
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266 */ |
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267 public Backend() { |
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268 } |
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269 |
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270 /** |
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271 * Constructor to create a backend with a link to the database cleaner. |
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272 * @param cleaner The clean which periodically removes outdated |
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273 * artifacts from the database. |
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274 */ |
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275 public Backend(DatabaseCleaner cleaner) { |
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276 this.cleaner = cleaner; |
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277 } |
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278 |
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279 |
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280 /** |
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281 * Returns the singleton of this Backend. |
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282 * |
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283 * @return the backend. |
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284 */ |
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285 public static synchronized Backend getInstance() { |
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286 if (instance == null) { |
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287 instance = new Backend(); |
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288 } |
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289 |
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290 return instance; |
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291 } |
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292 |
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293 /** |
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294 * Sets the factory lookup mechanism to decouple ArtifactDatabase |
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295 * and Backend. |
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296 * @param factoryLookup |
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297 */ |
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298 public void setFactoryLookup(FactoryLookup factoryLookup) { |
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299 this.factoryLookup = factoryLookup; |
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300 } |
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301 |
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302 /** |
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303 * Sets the database cleaner explicitly. |
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304 * @param cleaner The database cleaner |
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305 */ |
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306 public void setCleaner(DatabaseCleaner cleaner) { |
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307 this.cleaner = cleaner; |
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308 } |
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309 |
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310 /** |
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311 * Returns a new unique identifier to external identify |
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312 * the artifact across the system. This implementation |
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313 * uses random UUIDs v4 to achieve this target. |
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314 * @return the new identifier |
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315 */ |
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316 public String newIdentifier() { |
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317 // TODO: check database for collisions. |
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318 return StringUtils.newUUID(); |
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319 } |
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320 |
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321 /** |
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322 * Stores a new artifact into the database. |
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323 * @param artifact The artifact to be stored |
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324 * @param factory The factory which build the artifact |
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325 * @param ttl The initial time to life of the artifact. |
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326 * @return A persistent wrapper around the living |
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327 * artifact to be able to write modification later. |
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328 * @throws Exception Thrown if something went wrong with the |
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329 * storage process. |
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330 */ |
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331 public PersistentArtifact storeInitially( |
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332 Artifact artifact, |
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333 ArtifactFactory factory, |
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334 Long ttl |
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335 ) |
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336 throws Exception |
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337 { |
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338 return new PersistentArtifact( |
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339 artifact, |
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340 factory.getSerializer(), |
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341 ttl, |
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342 insertDatabase(artifact, factory, ttl)); |
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343 } |
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344 |
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345 /** |
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346 * Stores an artifact into database if it does not exist there. |
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347 * If it exists there it is only updated. |
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348 * @param artifact The artifact to store/update. |
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349 * @param factory The factory which created the artifact. |
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350 * @param ttl The initial time to live of the artifact. |
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351 * @return A persistent version of the artifact to be able |
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352 * to store a modification later. |
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353 * @throws Exception Thrown if something went wrong during |
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354 * storing/updating. |
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355 */ |
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356 public PersistentArtifact storeOrReplace( |
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357 Artifact artifact, |
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358 ArtifactFactory factory, |
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359 Long ttl |
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360 ) |
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361 throws Exception |
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362 { |
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363 return new PersistentArtifact( |
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364 artifact, |
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365 factory.getSerializer(), |
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366 ttl, |
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367 storeOrReplaceDatabase(artifact, factory, ttl)); |
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368 } |
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369 |
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370 /** |
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371 * Implementors of this interface are able to process the raw |
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372 * artifact data from the database for loading. |
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373 */ |
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374 public interface ArtifactLoader { |
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375 |
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376 /** |
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377 * Creates a custom object from the raw artifact database data. |
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378 * @param factory The factory that created this artifact. |
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379 * @param ttl The current time to life of the artifact. |
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380 * @param bytes The raw artifact bytes from the database. |
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381 * @param id The database id of the artifact. |
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382 * @return The custom object created by the implementation. |
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383 */ |
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384 Object load(ArtifactFactory factory, Long ttl, byte [] bytes, int id); |
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385 |
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386 } // interface ArtifactLoader |
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387 |
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388 /** |
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389 * Fetches an artifact from the database identified by the |
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390 * given identifier. |
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391 * @param identifer The identifier of the artifact. |
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392 * @return A persistent wrapper around the found artifact |
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393 * to be able to write back a modifaction later or null |
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394 * if no artifact is found for this identifier. |
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395 */ |
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396 public PersistentArtifact getArtifact(String identifer) { |
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397 |
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398 return (PersistentArtifact)loadArtifact( |
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399 identifer, |
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400 new ArtifactLoader() { |
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401 |
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402 public Object load( |
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403 ArtifactFactory factory, |
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404 Long ttl, |
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405 byte [] bytes, |
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406 int id |
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407 ) { |
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408 ArtifactSerializer serializer = factory.getSerializer(); |
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409 |
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410 Artifact artifact = serializer.fromBytes(bytes); |
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411 |
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412 return artifact == null |
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413 ? null |
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414 : new PersistentArtifact(artifact, serializer, ttl, id); |
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415 } |
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416 }); |
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417 } |
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418 |
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419 /** |
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420 * More general loading mechanism for artifacts. The concrete |
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421 * load processing is delegated to the given loader. |
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422 * @param identifer The identifier of the artifact. |
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423 * @param loader The loader which processes the raw database data. |
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424 * @return The object created by the loader. |
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425 */ |
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426 public Object loadArtifact( |
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427 final String identifer, |
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428 final ArtifactLoader loader |
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429 ) { |
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430 if (!StringUtils.checkUUID(identifer)) { |
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431 return null; |
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432 } |
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433 |
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434 final Object [] loaded = new Object[1]; |
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435 |
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436 SQLExecutor exec = new SQLExecutor() { |
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437 public boolean doIt() throws SQLException { |
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438 prepareStatement(SQL_LOAD_BY_GID); |
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439 stmnt.setString(1, identifer); |
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440 |
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441 result = stmnt.executeQuery(); |
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442 |
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443 if (!result.next()) { |
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444 return false; |
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445 } |
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446 |
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447 int id = result.getInt(1); |
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448 long ttlX = result.getLong(3); |
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449 |
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450 Long ttl = result.wasNull() ? null : Long.valueOf(ttlX); |
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451 |
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452 if (ttl != null) { // real time to life |
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453 long last_access = result.getTimestamp(2).getTime(); |
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454 if (last_access + ttlX < System.currentTimeMillis()) { |
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455 artifactOutdated(id); |
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456 return false; |
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457 } |
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458 } |
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459 |
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460 String factoryName = result.getString(4); |
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461 |
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462 if (factoryLookup == null) { |
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463 logger.error("factory lookup == null"); |
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464 return false; |
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465 } |
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466 |
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467 ArtifactFactory factory = factoryLookup |
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468 .getArtifactFactory(factoryName); |
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469 |
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470 if (factory == null) { |
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471 logger.error("factory '" + factoryName + "' not found"); |
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472 return false; |
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473 } |
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474 |
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475 byte [] bytes = result.getBytes(5); |
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476 |
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477 loaded[0] = loader.load(factory, ttl, bytes, id); |
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478 return true; |
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479 } |
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480 }; |
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481 |
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482 return exec.runRead() ? loaded[0] : null; |
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483 } |
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484 |
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485 /** |
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486 * Called if the load mechanism found an outdated artifact. |
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487 * It wakes up the database cleaner. |
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488 * @param id The id of the outdated artifact. |
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489 */ |
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490 protected void artifactOutdated(int id) { |
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491 if (logger.isDebugEnabled()) { |
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492 logger.info("artifactOutdated: id = " + id); |
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493 } |
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494 if (cleaner != null) { |
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495 cleaner.wakeup(); |
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496 } |
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497 } |
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498 |
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499 public Artifact reviveArtifact(String factoryName, byte [] bytes) { |
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500 if (factoryLookup == null) { |
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501 logger.error("reviveArtifact: factory lookup == null"); |
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502 return null; |
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503 } |
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504 ArtifactFactory factory = factoryLookup |
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505 .getArtifactFactory(factoryName); |
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506 |
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507 if (factory == null) { |
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508 logger.error( |
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509 "reviveArtifact: no factory '" + factoryName + "' found"); |
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510 return null; |
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511 } |
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512 |
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513 ArtifactSerializer serializer = factory.getSerializer(); |
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514 |
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515 return serializer.fromBytes(bytes); |
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516 } |
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517 |
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518 /** |
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519 * Internal method to store/replace an artifact inside the database. |
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520 * If an artifact with the given identifier does not exists it is |
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521 * created else only the content data is updated. |
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522 * @param artifact The artifact to be store/update inside the database. |
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523 * @param factory The factory that created the artifact. |
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524 * @param ttl The initial time to life of the artifact. |
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525 * @return The database id of the stored/updated artifact. |
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526 */ |
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527 protected int storeOrReplaceDatabase( |
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528 final Artifact artifact, |
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529 final ArtifactFactory factory, |
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530 final Long ttl |
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531 ) { |
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532 final String uuid = artifact.identifier(); |
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533 |
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534 if (!StringUtils.checkUUID(uuid)) { |
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535 throw new RuntimeException("No valid UUID"); |
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536 } |
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537 |
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538 final int [] id = new int[1]; |
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539 |
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540 SQLExecutor exec = new SQLExecutor() { |
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541 public boolean doIt() throws SQLException { |
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542 |
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543 prepareStatement(SQL_GET_ID); |
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544 stmnt.setString(1, uuid); |
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545 result = stmnt.executeQuery(); |
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546 |
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547 Integer ID = result.next() |
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548 ? Integer.valueOf(result.getInt(1)) |
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549 : null; |
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550 |
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551 reset(); |
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552 |
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553 if (ID != null) { // already in database |
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554 prepareStatement(SQL_REPLACE); |
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555 |
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556 if (ttl == null) { |
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557 stmnt.setNull(1, Types.BIGINT); |
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558 } |
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559 else { |
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560 stmnt.setLong(1, ttl.longValue()); |
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561 } |
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562 |
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563 stmnt.setString(2, factory.getName()); |
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564 stmnt.setBytes( |
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565 3, |
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566 factory.getSerializer().toBytes(artifact)); |
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567 id[0] = ID.intValue(); |
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568 stmnt.setInt(4, id[0]); |
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569 } |
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570 else { // new artifact |
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571 prepareStatement(SQL_NEXT_ID); |
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572 result = stmnt.executeQuery(); |
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573 |
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574 if (!result.next()) { |
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575 logger.error("No id generated"); |
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576 return false; |
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577 } |
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578 |
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579 reset(); |
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580 |
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581 prepareStatement(SQL_INSERT); |
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582 |
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583 id[0] = result.getInt(1); |
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584 stmnt.setInt(1, id[0]); |
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585 stmnt.setString(2, uuid); |
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586 if (ttl == null) { |
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587 stmnt.setNull(3, Types.BIGINT); |
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588 } |
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589 else { |
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590 stmnt.setLong(3, ttl.longValue()); |
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591 } |
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592 |
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593 stmnt.setString(4, factory.getName()); |
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594 |
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595 stmnt.setBytes( |
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596 5, |
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597 factory.getSerializer().toBytes(artifact)); |
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598 } |
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599 stmnt.execute(); |
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600 conn.commit(); |
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601 return true; |
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602 } |
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603 }; |
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604 |
174
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605 if (!exec.runWrite()) { |
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606 throw new RuntimeException("failed insert artifact into database"); |
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607 } |
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608 |
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609 return id[0]; |
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610 } |
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611 |
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612 /** |
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613 * Internal method to store an artifact inside the database. |
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614 * @param artifact The artifact to be stored. |
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615 * @param factory The factory which created the artifact. |
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616 * @param ttl The initial time to live of the artifact. |
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617 * @return The database id of the stored artifact. |
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618 */ |
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619 protected int insertDatabase( |
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620 final Artifact artifact, |
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621 final ArtifactFactory factory, |
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622 final Long ttl |
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623 ) { |
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624 final int [] id = new int[1]; |
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625 |
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626 SQLExecutor exec = new SQLExecutor() { |
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627 public boolean doIt() throws SQLException { |
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628 prepareStatement(SQL_NEXT_ID); |
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629 result = stmnt.executeQuery(); |
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630 |
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631 if (!result.next()) { |
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632 logger.error("No id generated"); |
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633 return false; |
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634 } |
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635 |
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636 id[0] = result.getInt(1); |
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637 |
174
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638 reset(); |
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639 prepareStatement(SQL_INSERT); |
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640 |
174
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641 String uuid = artifact.identifier(); |
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642 stmnt.setInt(1, id[0]); |
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643 stmnt.setString(2, uuid); |
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644 if (ttl == null) { |
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645 stmnt.setNull(3, Types.BIGINT); |
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646 } |
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647 else { |
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648 stmnt.setLong(3, ttl.longValue()); |
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649 } |
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650 |
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651 stmnt.setString(4, factory.getName()); |
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652 |
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653 stmnt.setBytes( |
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654 5, |
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655 factory.getSerializer().toBytes(artifact)); |
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656 |
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657 stmnt.execute(); |
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658 |
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659 conn.commit(); |
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660 return true; |
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661 } |
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662 }; |
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663 |
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664 if (!exec.runWrite()) { |
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665 throw new RuntimeException("failed insert artifact into database"); |
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666 } |
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667 |
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668 return id[0]; |
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669 } |
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670 |
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671 /** |
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672 * Touches the access timestamp of a given artifact to prevent |
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673 * that it will be removed from the database by the database cleaner. |
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674 * @param artifact The persistent wrapper around the living artifact. |
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675 */ |
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676 public void touch(final PersistentArtifact artifact) { |
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677 new SQLExecutor() { |
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678 public boolean doIt() throws SQLException { |
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679 prepareStatement(SQL_TOUCH); |
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680 stmnt.setInt(1, artifact.getId()); |
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681 stmnt.execute(); |
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682 conn.commit(); |
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683 return true; |
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684 } |
174
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685 }.runWrite(); |
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686 } |
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687 |
90
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688 /** |
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689 * Writes modification of an artifact back to the database. |
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690 * @param artifact The persistent wrapper around a living |
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691 * artifact. |
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692 */ |
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693 public void store(final PersistentArtifact artifact) { |
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694 new SQLExecutor() { |
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695 public boolean doIt() throws SQLException { |
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696 prepareStatement(SQL_UPDATE); |
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697 stmnt.setInt(2, artifact.getId()); |
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698 |
174
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699 byte [] bytes = artifact |
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700 .getSerializer() |
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701 .toBytes(artifact.getArtifact()); |
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702 |
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703 stmnt.setBytes(1, bytes); |
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704 stmnt.execute(); |
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705 conn.commit(); |
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706 return true; |
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707 } |
174
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708 }.runWrite(); |
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709 } |
133
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710 |
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711 public User createUser( |
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712 final String name, |
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713 final Document role, |
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714 final UserFactory factory, |
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715 final Object context |
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716 ) { |
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717 final User [] user = new User[1]; |
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718 |
174
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719 SQLExecutor exec = new SQLExecutor() { |
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720 public boolean doIt() throws SQLException { |
138
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721 |
174
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722 prepareStatement(SQL_USERS_NEXT_ID); |
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723 result = stmnt.executeQuery(); |
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724 |
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725 if (!result.next()) { |
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726 return false; |
138
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727 } |
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728 |
145
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729 int id = result.getInt(1); |
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730 |
174
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731 reset(); |
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732 |
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733 String identifier = newIdentifier(); |
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734 |
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735 prepareStatement(SQL_USERS_INSERT); |
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736 |
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737 stmnt.setInt(1, id); |
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738 stmnt.setString(2, identifier); |
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739 stmnt.setString(3, name); |
138
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740 |
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741 byte [] roleData = role == null |
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742 ? null |
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743 : XMLUtils.toByteArray(role); |
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744 |
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745 if (roleData == null) { |
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746 stmnt.setNull(4, Types.BIGINT); |
138
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747 } |
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748 else { |
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749 stmnt.setBytes(4, roleData); |
138
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750 } |
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|
751 |
174
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752 stmnt.execute(); |
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753 conn.commit(); |
138
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754 |
174
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755 user[0] = factory.createUser( |
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756 identifier, name, role, context); |
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757 return true; |
138
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758 } |
174
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759 }; |
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760 |
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761 return exec.runWrite() ? user[0] : null; |
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762 } |
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|
763 |
174
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764 public boolean deleteUser(final String identifier) { |
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|
765 |
147
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|
766 if (!StringUtils.checkUUID(identifier)) { |
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767 return false; |
147
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768 } |
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|
769 |
174
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770 SQLExecutor exec = new SQLExecutor() { |
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771 public boolean doIt() throws SQLException { |
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772 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
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|
773 |
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774 stmnt.setString(1, identifier); |
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775 result = stmnt.executeQuery(); |
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|
776 |
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777 if (!result.next()) { // No such user |
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778 return false; |
144
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|
779 } |
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|
780 |
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781 int id = result.getInt(1); |
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782 |
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783 reset(); |
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784 |
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785 // outdate the artifacts exclusively used by the user |
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786 |
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787 prepareStatement(SQL_OUTDATE_ARTIFACTS_USER); |
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788 stmnt.setInt(1, id); |
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|
789 stmnt.setInt(2, id); |
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790 stmnt.execute(); |
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791 |
174
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792 reset(); |
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793 |
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794 // delete the collection items of the user |
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795 |
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796 prepareStatement(SQL_DELETE_USER_COLLECTION_ITEMS); |
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797 stmnt.setInt(1, id); |
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798 stmnt.execute(); |
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799 |
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800 reset(); |
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801 |
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802 // delete the collections of the user |
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803 |
174
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804 prepareStatement(SQL_USERS_DELETE_COLLECTIONS); |
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805 stmnt.setInt(1, id); |
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806 stmnt.execute(); |
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807 |
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808 reset(); |
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|
809 |
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810 // delete the user |
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811 |
174
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812 prepareStatement(SQL_USERS_DELETE_ID); |
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813 stmnt.setInt(1, id); |
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814 stmnt.execute(); |
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815 |
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816 conn.commit(); |
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817 return true; |
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818 } |
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819 }; |
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820 |
174
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821 return exec.runWrite(); |
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822 } |
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823 |
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824 public User getUser( |
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825 final String identifier, |
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826 final UserFactory factory, |
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827 final Object context |
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828 ) { |
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829 if (!StringUtils.checkUUID(identifier)) { |
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830 logger.debug("Invalid UUID: '" + identifier + "'"); |
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831 return null; |
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832 } |
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833 |
174
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834 final User [] user = new User[1]; |
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835 |
174
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836 SQLExecutor exec = new SQLExecutor() { |
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837 public boolean doIt() throws SQLException { |
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838 prepareStatement(SQL_USERS_SELECT_GID); |
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839 stmnt.setString(1, identifier); |
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840 result = stmnt.executeQuery(); |
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841 if (!result.next()) { // no such user |
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842 return false; |
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843 } |
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844 // omit id |
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845 String name = result.getString(2); |
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846 byte [] roleData = result.getBytes(3); |
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847 |
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848 Document role = XMLUtils.fromByteArray(roleData); |
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849 |
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850 user[0] = factory.createUser( |
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851 identifier, name, role, context); |
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852 return true; |
147
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853 } |
174
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854 }; |
147
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855 |
174
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856 return exec.runRead() ? user[0] : null; |
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857 } |
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|
858 |
174
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859 public User [] getUsers( |
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860 final UserFactory factory, |
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861 final Object context |
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862 ) { |
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863 final ArrayList<User> users = new ArrayList<User>(); |
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864 |
174
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865 SQLExecutor exec = new SQLExecutor() { |
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866 public boolean doIt() throws SQLException { |
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867 prepareStatement(SQL_USERS_SELECT_ALL); |
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868 result = stmnt.executeQuery(); |
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869 |
174
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870 while (result.next()) { |
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871 // omit id |
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872 String identifier = result.getString(2); |
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873 String name = result.getString(3); |
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874 byte [] roleData = result.getBytes(4); |
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875 |
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876 Document role = XMLUtils.fromByteArray(roleData); |
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877 User user = factory.createUser( |
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878 identifier, name, role, context); |
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879 users.add(user); |
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880 } |
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881 return true; |
148
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882 } |
174
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883 }; |
148
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|
884 |
174
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885 return exec.runRead() |
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886 ? users.toArray(new User[users.size()]) |
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887 : null; |
133
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|
888 } |
156
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889 |
159
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|
890 public ArtifactCollection createCollection( |
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891 final String ownerIdentifier, |
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892 final String name, |
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893 final ArtifactCollectionFactory factory, |
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894 final Document data, |
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895 final Object context |
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896 ) { |
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|
897 if (name == null) { |
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898 logger.debug("Name is null"); |
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899 return null; |
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|
900 } |
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|
901 |
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902 if (!StringUtils.checkUUID(ownerIdentifier)) { |
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903 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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904 return null; |
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|
905 } |
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|
906 |
174
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907 final ArtifactCollection [] collection = |
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908 new ArtifactCollection[1]; |
159
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909 |
174
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910 SQLExecutor exec = new SQLExecutor() { |
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911 public boolean doIt() throws SQLException { |
159
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912 // fetch owner id |
174
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913 prepareStatement(SQL_USERS_SELECT_ID_BY_GID); |
159
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914 stmnt.setString(1, ownerIdentifier); |
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915 result = stmnt.executeQuery(); |
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916 |
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917 if (!result.next()) { // no such user |
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918 return false; |
159
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|
919 } |
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|
920 |
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921 int ownerId = result.getInt(1); |
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922 reset(); |
159
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923 |
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|
924 // fetch new collection seq number. |
174
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925 prepareStatement(SQL_COLLECTIONS_NEXT_ID); |
159
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926 result = stmnt.executeQuery(); |
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927 |
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928 if (!result.next()) { // no identifier generated |
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929 return false; |
159
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|
930 } |
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|
931 |
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|
932 int id = result.getInt(1); |
174
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933 reset(); |
159
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|
934 |
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|
935 String identifier = newIdentifier(); |
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|
936 |
174
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937 prepareStatement(SQL_COLLECTIONS_INSERT); |
159
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|
938 |
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|
939 stmnt.setInt(1, id); |
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|
940 stmnt.setString(2, identifier); |
161
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|
941 stmnt.setString(3, name); |
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|
942 stmnt.setInt(4, ownerId); |
159
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|
943 |
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|
944 // XXX: A bit odd: we don't have a collection, yet. |
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945 Long ttl = factory.timeToLiveUntouched(null, context); |
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|
946 |
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|
947 if (ttl == null) { |
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948 stmnt.setNull(5, Types.BIGINT); |
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|
949 } |
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|
950 else { |
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|
951 stmnt.setLong(5, ttl); |
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|
952 } |
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|
953 |
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|
954 stmnt.execute(); |
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955 conn.commit(); |
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|
956 |
174
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|
957 reset(); |
170
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958 |
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959 // fetch creation time from database |
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960 // done this way to use the time system |
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961 // of the database. |
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962 |
174
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963 prepareStatement(SQL_COLLECTIONS_CREATION_TIME); |
170
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964 stmnt.setInt(1, id); |
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965 |
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|
966 result = stmnt.executeQuery(); |
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967 |
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|
968 Date creationTime = null; |
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969 |
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|
970 if (result.next()) { |
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971 Timestamp timestamp = result.getTimestamp(1); |
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972 creationTime = new Date(timestamp.getTime()); |
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|
973 } |
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|
974 |
174
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975 collection[0] = factory.createCollection( |
170
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|
976 identifier, name, creationTime, data, context); |
174
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977 |
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|
978 return true; |
159
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|
979 } |
174
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|
980 }; |
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981 |
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|
982 return exec.runWrite() ? collection[0]: null; |
156
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|
983 } |
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|
984 |
164
268c2972d4a7
Implemented the interface method listCollections() in the artifact database.
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|
985 public ArtifactCollection [] listCollections( |
174
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986 final String ownerIdentifier, |
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987 final Document data, |
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988 final ArtifactCollectionFactory collectionFactory, |
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989 final UserFactory userFactory, |
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990 final Object context |
167
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991 ) { |
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|
992 if (ownerIdentifier != null |
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993 && !StringUtils.checkUUID(ownerIdentifier)) { |
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|
994 logger.debug("Invalid owner id: '" + ownerIdentifier + "'"); |
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995 return null; |
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|
996 } |
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|
997 |
174
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998 final ArrayList<ArtifactCollection> collections = |
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999 new ArrayList<ArtifactCollection>(); |
167
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|
1000 |
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1001 SQLExecutor exec = new SQLExecutor() { |
167
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|
1002 |
174
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1003 public boolean doIt() throws SQLException { |
167
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1004 |
174
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1005 if (ownerIdentifier != null) { |
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1006 prepareStatement(SQL_COLLECTIONS_SELECT_USER); |
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1007 stmnt.setString(1, ownerIdentifier); |
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1008 } |
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1009 else { |
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1010 prepareStatement(SQL_COLLECTIONS_SELECT_ALL); |
167
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1011 } |
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1012 |
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1013 result = stmnt.executeQuery(); |
167
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1014 |
174
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1015 while (result.next()) { |
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1016 String collectionIdentifier = result.getString(1); |
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1017 String collectionName = result.getString(2); |
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1018 Date creationTime = |
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1019 new Date(result.getTimestamp(3).getTime()); |
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1020 String userIdentifier = result.getString(4); |
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1021 |
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1022 ArtifactCollection collection = |
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1023 collectionFactory.createCollection( |
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1024 collectionIdentifier, |
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1025 collectionName, |
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1026 creationTime, |
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1027 data, |
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1028 context); |
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1029 |
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1030 if (userIdentifier != null) { |
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1031 collection.setUser(new LazyBackendUser( |
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1032 userIdentifier, userFactory, Backend.this, context)); |
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1033 } |
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1034 |
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1035 collections.add(collection); |
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1036 } |
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1037 return true; |
167
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1038 } |
174
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1039 }; |
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1040 |
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1041 return exec.runRead() |
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1042 ? collections.toArray(new ArtifactCollection[collections.size()]) |
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1043 : null; |
156
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1044 } |
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1045 |
174
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1046 |
156
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1047 public boolean deleteCollection(String collectionId) { |
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1048 // TODO: Implement me! |
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1049 return false; |
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1050 } |
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1051 |
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1052 public Document getCollectionAttribute( |
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1053 String collectionId, |
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1054 String artifactId |
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1055 ) { |
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1056 // TODO: Implement me! |
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1057 return null; |
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1058 } |
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1059 |
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1060 public boolean setCollectionAttribute( |
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1061 String collectionId, |
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1062 String artifactId, |
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1063 Document attribute |
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1064 ) { |
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1065 // TODO: Implement me! |
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1066 return false; |
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1067 } |
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1068 |
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1069 public boolean addCollectionArtifact( |
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1070 String collectionId, |
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1071 String artifactId |
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1072 ) { |
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1073 // TODO: Implement me! |
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1074 return false; |
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1075 } |
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1076 |
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1077 public boolean removeCollectionArtifact( |
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1078 String collectionId, |
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1079 String artifactId |
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1080 ) { |
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1081 // TODO: Implement me! |
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1082 return false; |
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1083 } |
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1084 |
157
6e6965873a48
Simplified creation of users.
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1085 public ArtifactCollection [] listCollectionArtifacts(String collectionId) { |
156
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1086 // TODO: Implement me! |
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1087 return null; |
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1088 } |
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1089 |
13
0d6badf6af42
Added not yet working backend to artifact database.
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diff
changeset
|
1090 } |
79
f69e5b87f05f
Implementation to export artifacts as xml (applied patch from issue208 by SLT).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
47
diff
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|
1091 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |