Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/DefaultArtifactFactory.java @ 230:fbd57d2eeaef

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Changed semantics of locked artifact ids. artifacts/trunk@1634 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 31 Mar 2011 14:48:28 +0000
parents b2115f484edb
children a367a0d011af
rev   line source
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.artifactdatabase;
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11 import de.intevation.artifacts.common.utils.Config;
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12
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13 import de.intevation.artifacts.Artifact;
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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
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17 import org.apache.log4j.Logger;
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18
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19 import org.w3c.dom.Document;
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20 import org.w3c.dom.Node;
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21
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22 /**
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23 * Trivial implementation of the ArtifactFactory interface.
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24 * Time to live (ttl), name and description are configured
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25 * via the Node given to #setup(Document, Node) with attributes
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26 * of same name. The class name of the artifacts to be build by this
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27 * factory is configures with the attribute 'artifact'.
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28 *
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29 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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30 */
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31 public class DefaultArtifactFactory
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32 implements ArtifactFactory
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33 {
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34 private static Logger logger =
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35 Logger.getLogger(DefaultArtifactFactory.class);
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36
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37 /**
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38 * XPath to access the TTL of this artifact.
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39 */
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40 public static final String XPATH_TTL = "@ttl";
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41 /**
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42 * XPath to access the name of this factory.
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43 */
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44 public static final String XPATH_NAME = "@name";
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45 /**
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46 * XPath to access the description of this artifact factory.
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47 */
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48 public static final String XPATH_DESCRIPTION = "@description";
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49 /**
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50 * XPath to access the class name of the artifacts to be build
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51 * by this factory.
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52 */
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53 public static final String XPATH_ARTIFACT = "@artifact";
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55 /**
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56 * Default description of this factory if none is given by the
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57 * configuration.
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58 */
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59 public static final String DEFAULT_DESCRIPTION =
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60 "No description available";
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62 /**
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63 * Class to load if no artifact class is given in the configuration.
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64 */
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65 public static final String DEFAULT_ARTIFACT =
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66 "de.intevation.artifactdatabase.DefaultArtifact";
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68 /**
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69 * The Time to live of the artifacts build by this factory.
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70 */
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71 protected Long ttl;
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72
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73 /**
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74 * The name of this factory.
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75 */
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76 protected String name;
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78 /**
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79 * The description of this factory.
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80 */
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81 protected String description;
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83 /**
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84 * The class of the artifacts to be build by this factory.
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85 */
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86 protected Class artifactClass;
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87
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88 /**
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89 * Default constructor.
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90 */
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91 public DefaultArtifactFactory() {
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92 }
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93
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94 public String getName() {
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95 return name;
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96 }
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97
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98 public String getDescription() {
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99 return description;
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100 }
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101
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102 public Artifact createArtifact(
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103 String identifier,
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104 Object context,
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105 Document data
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106 ) {
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107 try {
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108 Artifact artifact =
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109 (Artifact)artifactClass.newInstance();
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110
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111 artifact.setup(identifier, this, context, data);
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112
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113 return artifact;
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114 }
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115 catch (InstantiationException ie) {
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116 logger.error(ie.getLocalizedMessage(), ie);
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117 }
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118 catch (IllegalAccessException iae) {
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119 logger.error(iae.getLocalizedMessage(), iae);
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120 }
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121 catch (ClassCastException cce) {
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122 logger.error(cce.getLocalizedMessage(), cce);
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123 }
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124
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125 return null;
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126 }
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127
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128 public void setup(Document document, Node factoryNode) {
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129
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130 String ttlString = Config.getStringXPath(factoryNode, XPATH_TTL);
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131 if (ttlString != null) {
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132 try {
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133 ttl = Long.valueOf(ttlString);
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134 }
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135 catch (NumberFormatException nfe) {
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136 logger.warn("'" + ttlString + "' is not an integer.");
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137 }
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138 }
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139
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140 description = Config.getStringXPath(
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141 factoryNode, XPATH_DESCRIPTION, DEFAULT_DESCRIPTION);
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142
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143 name = Config.getStringXPath(
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144 factoryNode, XPATH_NAME, toString());
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145
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146 String artifact = Config.getStringXPath(
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147 factoryNode, XPATH_ARTIFACT, DEFAULT_ARTIFACT);
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148
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149 try {
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150 artifactClass = Class.forName(artifact);
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151 }
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152 catch (ClassNotFoundException cnfe) {
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153 logger.error(cnfe.getLocalizedMessage(), cnfe);
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154 }
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155
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156 if (artifactClass == null) {
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157 artifactClass = DefaultArtifact.class;
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158 }
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159 }
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160
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161 public Long timeToLiveUntouched(Artifact artifact, Object context) {
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162 return ttl;
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163 }
41
5e4bc24ea438 Made serilization more flexible. DB update required!!!
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164
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165 public ArtifactSerializer getSerializer() {
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166 return DefaultArtifactSerializer.INSTANCE;
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167 }
10
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168 }
91
730ff077a58c More javadoc, some code formatting.
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169 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org