Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/FactoryBootstrap.java @ 71:c99da6837be0

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Load service factories and services during bootstrap. artifacts/trunk@598 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 22 Jan 2010 11:27:57 +0000
parents ce488c1d3fc4
children 48d1a9a082c2
rev   line source
5
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1 package de.intevation.artifactdatabase;
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2
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3 import de.intevation.artifacts.ArtifactContextFactory;
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4 import de.intevation.artifacts.ArtifactFactory;
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5 import de.intevation.artifacts.ServiceFactory;
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6
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7 import java.util.ArrayList;
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8
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9 import org.apache.log4j.Logger;
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10
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11 import org.w3c.dom.Document;
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12 import org.w3c.dom.NodeList;
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13 /**
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14 * Bootstrap facility for the global context and the artifact factories.
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15 *
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16 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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17 */
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18 public class FactoryBootstrap
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19 {
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20 private static Logger logger = Logger.getLogger(FactoryBootstrap.class);
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22 public static final String CONTEXT_FACTORY =
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23 "/artifact-database/factories/context-factory/text()";
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24
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25 public static final String DEFAULT_CONTEXT_FACTORY =
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26 "de.intevation.artifactdatabase.DefaultArtifactContextFactory";
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28 public static final String ARTIFACT_FACTORIES =
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29 "/artifact-database/factories/artifact-factories/artifact-factory";
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31 public static final String SERVICE_FACTORIES =
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32 "/artifact-database/factories/service-factories/service-factory";
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34 protected Object context;
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35
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36 protected ArtifactFactory [] artifactFactories;
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38 protected ServiceFactory [] serviceFactories;
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39
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40 public FactoryBootstrap() {
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41 }
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43 void buildContext() {
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44 String className = Config.getStringXPath(
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45 CONTEXT_FACTORY, DEFAULT_CONTEXT_FACTORY);
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47 ArtifactContextFactory factory = null;
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48
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49 try {
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50 Class clazz = Class.forName(className);
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51 factory = (ArtifactContextFactory)clazz.newInstance();
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52 }
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53 catch (ClassNotFoundException cnfe) {
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54 logger.error(cnfe.getLocalizedMessage(), cnfe);
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55 }
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56 catch (InstantiationException ie) {
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57 logger.error(ie.getLocalizedMessage(), ie);
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58 }
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59 catch (ClassCastException cce) {
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60 logger.error(cce.getLocalizedMessage(), cce);
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61 }
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62 catch (IllegalAccessException iae) {
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63 logger.error(iae.getLocalizedMessage(), iae);
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64 }
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66 if (factory == null) {
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67 factory = new DefaultArtifactContextFactory();
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68 }
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70 logger.info("Using class '" + factory.getClass().getName()
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71 + "' for context creation.");
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73 context = factory.createArtifactContext(Config.getConfig());
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74 }
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76 protected void loadArtifactFactories() {
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77
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78 logger.info("loading artifact factories");
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79
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80 ArrayList loadedFactories = new ArrayList();
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82 NodeList nodes = Config.getNodeSetXPath(ARTIFACT_FACTORIES);
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83
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84 if (nodes == null) {
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85 logger.warn("No factories found");
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86 }
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87
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88 Document config = Config.getConfig();
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89
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90 for (int i = 0, N = nodes != null ? nodes.getLength() : 0; i < N; ++i) {
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91 String className = nodes.item(i).getTextContent().trim();
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93 ArtifactFactory factory = null;
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94
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95 try {
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96 Class clazz = Class.forName(className);
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97 factory = (ArtifactFactory)clazz.newInstance();
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98 }
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99 catch (ClassNotFoundException cnfe) {
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100 logger.error(cnfe.getLocalizedMessage(), cnfe);
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101 }
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102 catch (InstantiationException ie) {
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103 logger.error(ie.getLocalizedMessage(), ie);
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104 }
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105 catch (ClassCastException cce) {
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106 logger.error(cce.getLocalizedMessage(), cce);
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107 }
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108 catch (IllegalAccessException iae) {
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109 logger.error(iae.getLocalizedMessage(), iae);
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110 }
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112 if (factory != null) {
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113 factory.setup(config, nodes.item(i));
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114 loadedFactories.add(factory);
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115 logger.info("Registering '" + factory.getName() + "' as artifact factory.");
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116 }
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117 }
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118
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119 artifactFactories = (ArtifactFactory [])loadedFactories.toArray(
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120 new ArtifactFactory[loadedFactories.size()]);
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121 }
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122
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123 protected void loadServiceFactories() {
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124
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125 logger.info("loading service factories");
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126
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127 ArrayList loadedFactories = new ArrayList();
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128
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129 NodeList nodes = Config.getNodeSetXPath(SERVICE_FACTORIES);
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130
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131 if (nodes == null) {
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132 logger.warn("No factories found");
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133 }
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134
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135 Document config = Config.getConfig();
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136
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137 for (int i = 0, N = nodes != null ? nodes.getLength() : 0; i < N; ++i) {
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138 String className = nodes.item(i).getTextContent().trim();
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139
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140 ServiceFactory factory = null;
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141
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142 try {
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143 Class clazz = Class.forName(className);
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144 factory = (ServiceFactory)clazz.newInstance();
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145 }
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146 catch (ClassNotFoundException cnfe) {
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147 logger.error(cnfe.getLocalizedMessage(), cnfe);
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148 }
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149 catch (InstantiationException ie) {
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150 logger.error(ie.getLocalizedMessage(), ie);
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151 }
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152 catch (ClassCastException cce) {
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153 logger.error(cce.getLocalizedMessage(), cce);
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154 }
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155 catch (IllegalAccessException iae) {
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156 logger.error(iae.getLocalizedMessage(), iae);
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157 }
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158
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159 if (factory != null) {
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160 factory.setup(config, nodes.item(i));
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161 loadedFactories.add(factory);
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162 logger.info("Registering '" + factory.getName() + "' as service factory.");
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163 }
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164 }
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165
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166 serviceFactories = (ServiceFactory [])loadedFactories.toArray(
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167 new ServiceFactory[loadedFactories.size()]);
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168 }
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169
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170 public void boot() {
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171 buildContext();
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172 loadArtifactFactories();
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173 loadServiceFactories();
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174 }
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175
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176 public ArtifactFactory [] getArtifactFactories() {
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177 return artifactFactories;
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178 }
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179
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180 public ServiceFactory [] getServiceFactories() {
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181 return serviceFactories;
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182 }
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183
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184 public Object getContext() {
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185 return context;
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186 }
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187 }
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188 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org