Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/FactoryBootstrap.java @ 135:a48882c9e096

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Added a convinience method to transform an document into a byte array. artifacts/trunk@1360 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 02 Mar 2011 10:30:27 +0000
parents 147610c43863
children f797093c60bd
rev   line source
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.artifactdatabase;
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10
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11 import de.intevation.artifacts.ArtifactContextFactory;
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12 import de.intevation.artifacts.ArtifactFactory;
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13 import de.intevation.artifacts.ServiceFactory;
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14 import de.intevation.artifacts.UserFactory;
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15
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16 import java.util.ArrayList;
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17
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18 import org.apache.log4j.Logger;
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20 import org.w3c.dom.Document;
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21 import org.w3c.dom.Node;
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22 import org.w3c.dom.NodeList;
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23
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24 /**
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25 * Bootstrap facility for the global context and the artifact factories.
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26 *
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27 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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28 */
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29 public class FactoryBootstrap
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30 {
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31 private static Logger logger = Logger.getLogger(FactoryBootstrap.class);
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33 /**
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34 * XPath to figure out the class name of the context factory from
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35 * the global configuration.
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36 */
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37 public static final String CONTEXT_FACTORY =
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38 "/artifact-database/factories/context-factory/text()";
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39
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40 /**
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41 * The name of the default context factory.
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42 */
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43 public static final String DEFAULT_CONTEXT_FACTORY =
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44 "de.intevation.artifactdatabase.DefaultArtifactContextFactory";
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45
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46 /**
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47 * XPath to figure out the names of the artifact factories from
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48 * the global configuration to be exposed by the artifact database.
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49 */
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50 public static final String ARTIFACT_FACTORIES =
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51 "/artifact-database/factories/artifact-factories/artifact-factory";
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52
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53 /**
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54 * XPath to figure out the names of the service factories from
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55 * the global configuration to build the services offered by the
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56 * artifact database.
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57 */
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58 public static final String SERVICE_FACTORIES =
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59 "/artifact-database/factories/service-factories/service-factory";
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61 /**
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62 * XPath to figure out the class name of the user factory from global
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63 * configuration.
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64 */
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65 public static final String USER_FACTORY =
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66 "/artfifact-database/factories/user-factory";
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67
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68 /**
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69 * The name of the default user factory.
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70 */
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71 public static final String DEFAULT_USER_FACTORY =
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72 "de.intevation.artifactdatabase.DefaultUserFactory";
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73
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74 /**
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75 * XPath to figure out the secret used to sign the artifact exports
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76 * made by the artfifact database server.
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77 */
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78 public static final String EXPORT_SECRET =
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79 "/artifact-database/export-secret/text()";
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81 /**
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82 * Default export signing secret.
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83 * <strong>PLEASE CHANGE THE SECRET VIA THE XPATH EXPORT_SECRET
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84 * IN THE CONFIGURATION.</strong>.
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85 */
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86 public static final String DEFAULT_EXPORT_SECRET =
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87 "!!!CHANGE ME! I'M NO SECRET!!!";
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89 /**
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90 * Reference to the global context build by the global context factory.
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91 */
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92 protected Object context;
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94 /**
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95 * List of the artifact factories to be exposed by the
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96 * artifact database.
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97 */
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98 protected ArtifactFactory [] artifactFactories;
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99
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100 /**
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101 * List of service factories which creates services that are
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102 * exposed by the artifact database.
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103 */
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104 protected ServiceFactory [] serviceFactories;
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106 /**
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107 * The factory that is used to create and list users.
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108 */
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109 protected UserFactory userFactory;
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110
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111 /**
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112 * byte array holding the export signing secret.
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113 */
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114 protected byte [] exportSecret;
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115
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117 /**
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118 * Default constructor
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119 */
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120 public FactoryBootstrap() {
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121 }
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122
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123 void buildContext() {
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124 String className = Config.getStringXPath(
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125 CONTEXT_FACTORY, DEFAULT_CONTEXT_FACTORY);
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126
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127 ArtifactContextFactory factory = null;
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128
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129 try {
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130 Class clazz = Class.forName(className);
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131 factory = (ArtifactContextFactory)clazz.newInstance();
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132 }
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133 catch (ClassNotFoundException cnfe) {
17
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134 logger.error(cnfe.getLocalizedMessage(), cnfe);
5
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135 }
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136 catch (InstantiationException ie) {
17
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137 logger.error(ie.getLocalizedMessage(), ie);
5
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138 }
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139 catch (ClassCastException cce) {
17
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140 logger.error(cce.getLocalizedMessage(), cce);
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141 }
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142 catch (IllegalAccessException iae) {
17
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143 logger.error(iae.getLocalizedMessage(), iae);
5
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144 }
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145
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146 if (factory == null) {
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147 factory = new DefaultArtifactContextFactory();
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148 }
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149
19
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150 logger.info("Using class '" + factory.getClass().getName()
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151 + "' for context creation.");
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152
5
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153 context = factory.createArtifactContext(Config.getConfig());
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154 }
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155
89
d348fe1fd822 More javadoc (fixes small glitches, too).
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156 /**
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157 * Scans the global configuration to load the configured
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158 * artifact factories and sets them up.
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159 */
5
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160 protected void loadArtifactFactories() {
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161
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162 logger.info("loading artifact factories");
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163
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164 ArrayList loadedFactories = new ArrayList();
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165
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166 NodeList nodes = Config.getNodeSetXPath(ARTIFACT_FACTORIES);
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167
10
e8626caac353 * Made Artifact life cycle symmetric: setup/endOfLife.
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168 if (nodes == null) {
17
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169 logger.warn("No factories found");
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170 }
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171
5
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172 Document config = Config.getConfig();
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173
19
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174 for (int i = 0, N = nodes != null ? nodes.getLength() : 0; i < N; ++i) {
71
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175 String className = nodes.item(i).getTextContent().trim();
5
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176
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177 ArtifactFactory factory = null;
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178
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179 try {
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180 Class clazz = Class.forName(className);
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181 factory = (ArtifactFactory)clazz.newInstance();
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182 }
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183 catch (ClassNotFoundException cnfe) {
17
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184 logger.error(cnfe.getLocalizedMessage(), cnfe);
5
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185 }
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186 catch (InstantiationException ie) {
17
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187 logger.error(ie.getLocalizedMessage(), ie);
5
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188 }
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189 catch (ClassCastException cce) {
17
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190 logger.error(cce.getLocalizedMessage(), cce);
5
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191 }
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192 catch (IllegalAccessException iae) {
17
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193 logger.error(iae.getLocalizedMessage(), iae);
5
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194 }
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195
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196 if (factory != null) {
19
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diff changeset
197 factory.setup(config, nodes.item(i));
5
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198 loadedFactories.add(factory);
89
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diff changeset
199 logger.info("Registering '"
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200 + factory.getName() + "' as artifact factory.");
5
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201 }
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202 }
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203
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204 artifactFactories = (ArtifactFactory [])loadedFactories.toArray(
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205 new ArtifactFactory[loadedFactories.size()]);
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206 }
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207
89
d348fe1fd822 More javadoc (fixes small glitches, too).
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diff changeset
208 /**
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diff changeset
209 * Scans the global configuration for the configured service factories
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diff changeset
210 * and sets them up.
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diff changeset
211 */
71
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diff changeset
212 protected void loadServiceFactories() {
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diff changeset
213
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diff changeset
214 logger.info("loading service factories");
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diff changeset
215
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diff changeset
216 ArrayList loadedFactories = new ArrayList();
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diff changeset
217
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diff changeset
218 NodeList nodes = Config.getNodeSetXPath(SERVICE_FACTORIES);
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diff changeset
219
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diff changeset
220 if (nodes == null) {
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diff changeset
221 logger.warn("No factories found");
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diff changeset
222 }
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diff changeset
223
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diff changeset
224 Document config = Config.getConfig();
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diff changeset
225
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diff changeset
226 for (int i = 0, N = nodes != null ? nodes.getLength() : 0; i < N; ++i) {
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diff changeset
227 String className = nodes.item(i).getTextContent().trim();
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diff changeset
228
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diff changeset
229 ServiceFactory factory = null;
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diff changeset
230
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diff changeset
231 try {
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diff changeset
232 Class clazz = Class.forName(className);
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diff changeset
233 factory = (ServiceFactory)clazz.newInstance();
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234 }
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235 catch (ClassNotFoundException cnfe) {
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diff changeset
236 logger.error(cnfe.getLocalizedMessage(), cnfe);
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diff changeset
237 }
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diff changeset
238 catch (InstantiationException ie) {
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diff changeset
239 logger.error(ie.getLocalizedMessage(), ie);
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240 }
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diff changeset
241 catch (ClassCastException cce) {
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diff changeset
242 logger.error(cce.getLocalizedMessage(), cce);
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diff changeset
243 }
c99da6837be0 Load service factories and services during bootstrap.
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diff changeset
244 catch (IllegalAccessException iae) {
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245 logger.error(iae.getLocalizedMessage(), iae);
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246 }
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247
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248 if (factory != null) {
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249 factory.setup(config, nodes.item(i));
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250 loadedFactories.add(factory);
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251 logger.info( "Registering '" + factory.getName()
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252 + "' as service factory.");
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253 }
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254 }
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255
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256 serviceFactories = (ServiceFactory [])loadedFactories.toArray(
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257 new ServiceFactory[loadedFactories.size()]);
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258 }
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259
125
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260
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261 /**
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262 * Scans the global configuration for the configured user factory.
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263 */
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264 protected void loadUserFactory() {
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265 logger.info("loading user factory");
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266
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267 Node factory = Config.getNodeXPath(USER_FACTORY);
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268
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269 String className = Config.getStringXPath(
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270 factory, "text()", DEFAULT_USER_FACTORY);
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271
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272 try {
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273 Class clazz = Class.forName(className);
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274 userFactory = (UserFactory) clazz.newInstance();
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275
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276 userFactory.setup(Config.getConfig(), factory);
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277 }
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278 catch (ClassNotFoundException cnfe) {
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279 logger.error(cnfe.getLocalizedMessage(), cnfe);
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280 }
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281 catch (InstantiationException ie) {
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282 logger.error(ie.getLocalizedMessage(), ie);
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283 }
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284 catch (ClassCastException cce) {
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285 logger.error(cce.getLocalizedMessage(), cce);
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286 }
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287 catch (IllegalAccessException iae) {
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288 logger.error(iae.getLocalizedMessage(), iae);
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289 }
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290 }
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291
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292 /**
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293 * Fetches the export signing secret from the global configuration.
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294 * If none is found if defaults to the DEFAULT_EXORT_SECRET which
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295 * is insecure.
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296 */
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297 protected void setupExportSecret() {
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298 String secret = Config.getStringXPath(EXPORT_SECRET);
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299
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300 if (secret == null) {
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301 logger.warn("NO EXPORT SECRET SET! USING INSECURE DEFAULT!");
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302 secret = DEFAULT_EXPORT_SECRET;
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303 }
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304
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305 exportSecret = StringUtils.getUTF8Bytes(secret);
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306 }
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307
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308 /**
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309 * Loads all the dynamic classes configured by the global configuration.
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310 */
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311 public void boot() {
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312 setupExportSecret();
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313 buildContext();
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314 loadArtifactFactories();
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315 loadServiceFactories();
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316 loadUserFactory();
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317 }
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318
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319 /**
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320 * Returns the list of ready to use artifact factories.
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321 * @return The list of artifact factories.
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322 */
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323 public ArtifactFactory [] getArtifactFactories() {
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324 return artifactFactories;
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325 }
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326
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327 /**
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328 * Returns the ready to use service factories.
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329 * @return The list of service factories.
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330 */
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331 public ServiceFactory [] getServiceFactories() {
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332 return serviceFactories;
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333 }
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334
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335 /**
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336 * Returns the user factory.
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337 *
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338 * @return the user factory.
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339 */
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340 public UserFactory getUserFactory() {
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341 return userFactory;
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342 }
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343
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344 /**
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345 * Returns the global context created by the global context factory.
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346 * @return The global context.
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347 */
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348 public Object getContext() {
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349 return context;
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350 }
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351
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352 /**
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353 * Returns the signing secret to be used when ex- and importing
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354 * artifacts from and into the artifact database.
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355 * @return the byte array containg the signing secret.
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356 */
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357 public byte [] getExportSecret() {
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358 return exportSecret;
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359 }
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360 }
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361 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org