Mercurial > hg > digilib-old

annotate servlet3/src/main/java/digilib/servlet/Initialiser.java @ 1158:2ee261676828 default tip

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better out-of-the box experience: * digilib works without config files using sensible defaults * new sample images folder used by default * config files moved to templates
author robcast
date Tue, 19 Feb 2013 17:32:25 +0100
parents b2d97b842612
children
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1 /* Initialiser.java -- initalisation servlet for setup tasks
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2 *
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3 * Digital Image Library servlet components
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4 *
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5 * Copyright (C) 2004 Robert Casties (robcast@mail.berlios.de)
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6 *
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7 * This program is free software; you can redistribute it and/or modify it
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8 * under the terms of the GNU General Public License as published by the Free
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9 * Software Foundation; either version 2 of the License, or (at your option)
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10 * any later version.
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11 *
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12 * Please read license.txt for the full details. A copy of the GPL may be found
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13 * at http://www.gnu.org/copyleft/lgpl.html
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14 *
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15 * You should have received a copy of the GNU General Public License along with
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16 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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17 * Place, Suite 330, Boston, MA 02111-1307 USA
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18 *
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19 * Created on 18.10.2004
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20 */
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21 package digilib.servlet;
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22
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23 import java.io.File;
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24 import java.io.OutputStream;
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25 import java.util.List;
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26
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27 import javax.imageio.ImageIO;
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28 import javax.servlet.ServletContext;
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29 import javax.servlet.ServletContextEvent;
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30 import javax.servlet.ServletContextListener;
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31 import javax.servlet.ServletRequestEvent;
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32 import javax.servlet.ServletRequestListener;
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33 import javax.servlet.annotation.WebListener;
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34
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35 import org.apache.log4j.Logger;
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36 import org.apache.log4j.xml.DOMConfigurator;
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37
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38 import digilib.auth.AuthOps;
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39 import digilib.auth.XMLAuthOps;
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40 import digilib.image.DocuImage;
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41 import digilib.io.AliasingDocuDirCache;
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42 import digilib.io.DocuDirCache;
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43 import digilib.io.FileOps.FileClass;
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44 import digilib.util.DigilibJobCenter;
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45
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46 /**
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47 * Singleton initalisation listener for setup tasks and resources.
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48 *
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49 * @author casties
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50 *
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51 */
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52 @WebListener
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53 public class Initialiser implements ServletContextListener, ServletRequestListener {
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54
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55
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56 /** servlet version */
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57 public static final String version = "0.4";
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58
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59 /** gengeral logger for this class */
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60 private static Logger logger = Logger.getLogger("digilib.init");
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61
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62 /** DocuDirCache instance */
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63 DocuDirCache dirCache;
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64
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65 /** DigilibConfiguration instance */
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66 DigilibServletConfiguration dlConfig;
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67
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68 /** Executor for digilib image jobs (AsyncServletWorker doesn't return anything) */
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69 DigilibJobCenter<DocuImage> imageEx;
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70
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71 /** Executor for PDF jobs */
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72 DigilibJobCenter<OutputStream> pdfEx;
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73
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74 /** Executor for PDF image jobs */
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75 DigilibJobCenter<DocuImage> pdfImageEx;
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76
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77 /**
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78 * Initialisation on first run.
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79 */
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80 public void contextInitialized(ServletContextEvent cte) {
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81 ServletContext context = cte.getServletContext();
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82
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83 System.out.println("***** Digital Image Library Initialiser (version "
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84 + version + ") *****");
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85
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86 // see if there is a Configuration instance
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87 dlConfig = (DigilibServletConfiguration) context.getAttribute("digilib.servlet.configuration");
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88 if (dlConfig == null) {
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89 // create new Configuration
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90 try {
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91 dlConfig = new DigilibServletConfiguration(context);
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92
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93 /*
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94 * further initialization
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95 */
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96
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97 // set up the logger
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98 File logConf = ServletOps.getConfigFile((File) dlConfig
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99 .getValue("log-config-file"), context);
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100 if (logConf.canRead()) {
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101 DOMConfigurator.configure(logConf.getAbsolutePath());
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102 dlConfig.setValue("log-config-file", logConf);
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103 }
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104 // say hello in the log file
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105 logger
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106 .info("***** Digital Image Library Initialiser (version "
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107 + version + ") *****");
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108 // directory cache
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109 String[] bd = (String[]) dlConfig.getValue("basedir-list");
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110 FileClass[] fcs = { FileClass.IMAGE, FileClass.TEXT };
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111 if (dlConfig.getAsBoolean("use-mapping")) {
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112 // with mapping file
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113 File mapConf = ServletOps.getConfigFile((File) dlConfig
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114 .getValue("mapping-file"), context);
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115 dirCache = new AliasingDocuDirCache(bd, fcs, mapConf,
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116 dlConfig);
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117 dlConfig.setValue("mapping-file", mapConf);
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118 } else {
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119 // without mapping
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120 dirCache = new DocuDirCache(bd, fcs, dlConfig);
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121 }
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122 dlConfig.setValue("servlet.dir.cache", dirCache);
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123 // useAuthentication
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124 if (dlConfig.getAsBoolean("use-authorization")) {
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125 // DB version
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126 //authOp = new DBAuthOpsImpl(util);
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127 // XML version
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128 File authConf = ServletOps.getConfigFile((File) dlConfig
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129 .getValue("auth-file"), context);
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130 AuthOps authOp = new XMLAuthOps(authConf);
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131 dlConfig.setValue("servlet.auth.op", authOp);
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132 dlConfig.setValue("auth-file", authConf);
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133 }
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134 // DocuImage class
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135 DocuImage di = DigilibConfiguration.getDocuImageInstance();
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136 dlConfig.setValue("servlet.docuimage.class", di.getClass().getName());
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137 // disk cache for image toolkit
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138 boolean dc = dlConfig.getAsBoolean("img-diskcache-allowed");
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139 // TODO: methods for all toolkits?
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140 ImageIO.setUseCache(dc);
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141 // digilib worker threads
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142 int nt = dlConfig.getAsInt("worker-threads");
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143 int mt = dlConfig.getAsInt("max-waiting-threads");
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144 imageEx = new DigilibJobCenter<DocuImage>(nt, mt, false, "servlet.worker.imageexecutor");
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145 dlConfig.setValue("servlet.worker.imageexecutor", imageEx);
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146 // digilib worker timeout
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147 long to = dlConfig.getAsInt("worker-timeout");
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148 AsyncServletWorker.setTimeout(to);
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149 // PDF worker threads
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150 int pnt = dlConfig.getAsInt("pdf-worker-threads");
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151 int pmt = dlConfig.getAsInt("pdf-max-waiting-threads");
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152 pdfEx = new DigilibJobCenter<OutputStream>(pnt, pmt, false, "servlet.worker.pdfexecutor");
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153 dlConfig.setValue("servlet.worker.pdfexecutor", pdfEx);
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154 // PDF image worker threads
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155 int pint = dlConfig.getAsInt("pdf-image-worker-threads");
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156 int pimt = dlConfig.getAsInt("pdf-image-max-waiting-threads");
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157 pdfImageEx = new DigilibJobCenter<DocuImage>(pint, pimt, false, "servlet.worker.pdfimageexecutor");
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158 dlConfig.setValue("servlet.worker.pdfimageexecutor", pdfImageEx);
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159 // set as the servlets main config
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160 context.setAttribute("digilib.servlet.configuration", dlConfig);
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161
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162 } catch (Exception e) {
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163 logger.error("Error in initialisation: ", e);
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164 }
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165 } else {
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166 // say hello in the log file
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167 logger.info("***** Digital Image Library Initialiser (version "
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168 + version + ") *****");
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169 logger.warn("Already initialised!");
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170 }
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171 }
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172
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173 /** clean up local resources
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174 *
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175 */
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176 public void contextDestroyed(ServletContextEvent arg0) {
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177 logger.info("Initialiser shutting down.");
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178 if (dirCache != null) {
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179 // shut down dirCache?
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180 dirCache = null;
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181 }
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182 if (imageEx != null) {
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183 // shut down image thread pool
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184 List<Runnable> rj = imageEx.shutdownNow();
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185 int nrj = rj.size();
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186 if (nrj > 0) {
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187 logger.error("Still running threads when shutting down image job queue: "+nrj);
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188 }
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189 }
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190 if (pdfEx != null) {
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191 // shut down pdf thread pool
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192 List<Runnable> rj = pdfEx.shutdownNow();
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193 int nrj = rj.size();
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194 if (nrj > 0) {
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195 logger.error("Still running threads when shutting down PDF job queue: "+nrj);
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196 }
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197 }
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198 if (pdfImageEx != null) {
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199 // shut down pdf image thread pool
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200 List<Runnable> rj = pdfImageEx.shutdownNow();
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201 int nrj = rj.size();
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202 if (nrj > 0) {
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203 logger.error("Still running threads when shutting down PDF-image job queue: "+nrj);
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204 }
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205 }
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206 }
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207
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208 @Override
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209 public void requestDestroyed(ServletRequestEvent arg0) {
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210 int i = dlConfig.openRequestCnt.decrementAndGet();
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211 logger.debug("ServletRequest destroyed. (cnt="+i+")");
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212 }
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213
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214 @Override
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215 public void requestInitialized(ServletRequestEvent arg0) {
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216 dlConfig.webappRequestCnt.incrementAndGet();
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217 int i = dlConfig.openRequestCnt.incrementAndGet();
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218 logger.debug("ServletRequest created. (cnt="+i+")");
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219 }
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220
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221 }