Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/DefaultArtifactCollectionFactory.java @ 196:171b6200d26d

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Added a describe() action for collections - the implementation in the artifact server is currently just a stub that throws an not implemented exception. artifacts/trunk@1426 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 08 Mar 2011 10:38:14 +0000
parents ac0f8bd97277
children b2115f484edb
rev   line source
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1 /*
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2 * Copyright (c) 2011 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8 package de.intevation.artifactdatabase;
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9
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10 import org.apache.log4j.Logger;
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11
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12 import org.w3c.dom.Document;
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13 import org.w3c.dom.Node;
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14
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15 import de.intevation.artifacts.ArtifactCollection;
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16 import de.intevation.artifacts.ArtifactCollectionFactory;
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17
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18 import java.util.Date;
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19
122
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20
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21 /**
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22 * The default implementation of a ArtifactCollectionFactory.
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23 *
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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25 */
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26 public class DefaultArtifactCollectionFactory
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27 implements ArtifactCollectionFactory
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28 {
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29 /** The logger that is used in this factory.*/
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30 private static Logger logger =
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31 Logger.getLogger(DefaultArtifactCollectionFactory.class);
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32
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33 /** XPath to access the TTL of this artifact.*/
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34 public static final String XPATH_TTL = "@ttl";
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35
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36 /** XPath to access the name of this factory.*/
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37 public static final String XPATH_NAME = "@name";
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38
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39 /** XPath to access the description of this artifact factory.*/
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40 public static final String XPATH_DESCRIPTION = "@description";
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41
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42 /**
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43 * XPath to access the class name of the artifacts to be build
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44 * by this factory.
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45 */
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46 public static final String XPATH_ARTIFACTCOLLECTION = "@artifact-collection";
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47
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48 /**
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49 * Default description of this factory if none is given by the
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50 * configuration.
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51 */
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52 public static final String DEFAULT_DESCRIPTION =
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53 "No description available";
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54
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55 /**
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56 * Class to load if no artifact class is given in the configuration.
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57 */
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58 public static final String DEFAULT_ARTIFACTCOLLECTION =
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59 "de.intevation.artifactdatabase.DefaultArtifact";
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60
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61
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62 /** The name of the factory.*/
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63 protected String name;
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64
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65 /** The description of the factory.*/
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66 protected String description;
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67
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68 /** The class that is used to instantiate new ArtifactCollection.*/
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69 protected Class clazz;
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70
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71 /** The time to live of the artifact collection build by this factory.*/
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72 protected Long ttl;
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73
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74
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75 /**
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76 * The default constructor.
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77 */
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78 public DefaultArtifactCollectionFactory() {
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79 }
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80
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81
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82 /**
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83 * The short name of this factory.
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84 *
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85 * @return the name of this factory.
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86 */
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87 public String getName() {
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88 return name;
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89 }
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90
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91
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92 /**
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93 * Description of this factory.
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94 *
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95 * @return description of the factory.
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96 */
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97 public String getDescription() {
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98 return description;
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99 }
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100
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101
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102 /**
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103 * Returns the time to live of the given artifact.
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104 *
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105 * @param artifact
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106 */
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107 public Long timeToLiveUntouched(
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108 ArtifactCollection collection,
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109 Object context)
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110 {
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111 return ttl;
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112 }
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113
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114
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115 /**
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116 * Create a new artifact of certain type, given a general purpose context and
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117 * an identifier.
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118 * @param context a context from the ArtifactDatabase.
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119 * @param identifier unique identifer for the new artifact
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120 * @param data the data containing more details for the setup of an Artifact.
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121 * @return a new {@linkplain de.intevation.artifacts.ArtifactCollection ArtifactCollection}
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122 */
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123 public ArtifactCollection createCollection(
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124 String identifier,
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125 String name,
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126 Date creationTime,
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127 Document data,
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128 Object context
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129 ) {
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130 try {
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131 ArtifactCollection collection =
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132 (ArtifactCollection) clazz.newInstance();
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133
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134 collection.setup(identifier, name, creationTime, this, context, data);
122
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135
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136 return collection;
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137 }
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138 catch (InstantiationException ie) {
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139 logger.error(ie.getLocalizedMessage(), ie);
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140 }
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141 catch (IllegalAccessException iae) {
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142 logger.error(iae.getLocalizedMessage(), iae);
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143 }
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144 catch (ClassCastException cce) {
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145 logger.error(cce.getLocalizedMessage(), cce);
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146 }
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147
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148 return null;
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149 }
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150
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151 /**
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152 * Setup the factory with a given configuration
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153 * @param config the configuration
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154 * @param factoryNode the ConfigurationNode of this Factory
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155 */
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156 public void setup(Document config, Node factoryNode) {
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157 String ttlString = Config.getStringXPath(factoryNode, XPATH_TTL);
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158 if (ttlString != null) {
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159 try {
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160 ttl = Long.valueOf(ttlString);
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161 }
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162 catch (NumberFormatException nfe) {
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163 logger.warn("'" + ttlString + "' is not an integer.");
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164 }
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165 }
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166
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167 description = Config.getStringXPath(
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168 factoryNode, XPATH_DESCRIPTION, DEFAULT_DESCRIPTION);
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169
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170 name = Config.getStringXPath(factoryNode, XPATH_NAME, toString());
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171
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172 String artifactCollection = Config.getStringXPath(
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173 factoryNode, XPATH_ARTIFACTCOLLECTION, DEFAULT_ARTIFACTCOLLECTION);
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174
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175 try {
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176 clazz = Class.forName(artifactCollection);
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177 }
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178 catch (ClassNotFoundException cnfe) {
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179 logger.error(cnfe.getLocalizedMessage(), cnfe);
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180 }
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181
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182 if (clazz == null) {
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183 clazz = DefaultArtifactCollection.class;
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184 }
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185 }
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186 }
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187 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org