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annotate servlet3/src/main/java/digilib/servlet/Initialiser.java @ 951:9c699b6cfcca

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preview for ZoomArea. shows distortions when changing aspect ratio.
author robcast
date Tue, 03 Jan 2012 21:44:22 +0100
parents 7bcc6765c209
children b2d97b842612
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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 import java.util.concurrent.atomic.AtomicInteger;
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27
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28 import javax.imageio.ImageIO;
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29 import javax.servlet.ServletContext;
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30 import javax.servlet.ServletContextEvent;
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31 import javax.servlet.ServletContextListener;
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32 import javax.servlet.ServletRequestEvent;
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33 import javax.servlet.ServletRequestListener;
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34 import javax.servlet.annotation.WebListener;
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35
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36 import org.apache.log4j.Logger;
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37 import org.apache.log4j.xml.DOMConfigurator;
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38
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39 import digilib.auth.AuthOps;
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40 import digilib.auth.XMLAuthOps;
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41 import digilib.image.DocuImage;
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42 import digilib.io.AliasingDocuDirCache;
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43 import digilib.io.DocuDirCache;
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44 import digilib.io.FileOps.FileClass;
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45 import digilib.util.DigilibJobCenter;
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46
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47 /**
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48 * Singleton initalisation listener for setup tasks and resources.
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49 *
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50 * @author casties
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51 *
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52 */
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53 @WebListener
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54 public class Initialiser implements ServletContextListener, ServletRequestListener {
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55
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56
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57 /** servlet version */
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58 public static final String version = "0.3";
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59
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60 /** gengeral logger for this class */
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61 private static Logger logger = Logger.getLogger("digilib.init");
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62
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63 /** DocuDirCache instance */
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64 DocuDirCache dirCache;
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65
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66 /** DigilibConfiguration instance */
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67 DigilibServletConfiguration dlConfig;
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68
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69 /** Executor for digilib image jobs (AsyncServletWorker doesn't return anything) */
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70 DigilibJobCenter<DocuImage> imageEx;
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71
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72 /** Executor for PDF jobs */
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73 DigilibJobCenter<OutputStream> pdfEx;
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74
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75 /** Executor for PDF image jobs */
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76 DigilibJobCenter<DocuImage> pdfImageEx;
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77
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78 /**
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79 * Initialisation on first run.
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80 */
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81 public void contextInitialized(ServletContextEvent cte) {
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82 ServletContext context = cte.getServletContext();
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83
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84 System.out.println("***** Digital Image Library Initialiser (version "
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85 + version + ") *****");
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86
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87 // see if there is a Configuration instance
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88 dlConfig = (DigilibServletConfiguration) context.getAttribute("digilib.servlet.configuration");
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89 if (dlConfig == null) {
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90 // create new Configuration
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91 try {
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92 dlConfig = new DigilibServletConfiguration(context);
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93
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94 /*
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95 * further initialization
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96 */
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97
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98 // set up the logger
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99 File logConf = ServletOps.getConfigFile((File) dlConfig
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100 .getValue("log-config-file"), context);
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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 // say hello in the log file
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104 logger
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105 .info("***** Digital Image Library Initialiser (version "
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106 + version + ") *****");
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107 // directory cache
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108 String[] bd = (String[]) dlConfig.getValue("basedir-list");
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109 FileClass[] fcs = { FileClass.IMAGE, FileClass.TEXT };
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110 if (dlConfig.getAsBoolean("use-mapping")) {
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111 // with mapping file
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112 File mapConf = ServletOps.getConfigFile((File) dlConfig
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113 .getValue("mapping-file"), context);
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114 dirCache = new AliasingDocuDirCache(bd, fcs, mapConf,
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115 dlConfig);
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116 dlConfig.setValue("mapping-file", mapConf);
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117 } else {
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118 // without mapping
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119 dirCache = new DocuDirCache(bd, fcs, dlConfig);
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120 }
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121 dlConfig.setValue("servlet.dir.cache", dirCache);
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122 // useAuthentication
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123 if (dlConfig.getAsBoolean("use-authorization")) {
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124 // DB version
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125 //authOp = new DBAuthOpsImpl(util);
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126 // XML version
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127 File authConf = ServletOps.getConfigFile((File) dlConfig
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128 .getValue("auth-file"), context);
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129 AuthOps authOp = new XMLAuthOps(authConf);
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130 dlConfig.setValue("servlet.auth.op", authOp);
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131 dlConfig.setValue("auth-file", authConf);
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132 }
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133 // DocuImage class
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134 DocuImage di = DigilibConfiguration.getDocuImageInstance();
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135 dlConfig.setValue("servlet.docuimage.class", di.getClass().getName());
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136 // disk cache for image toolkit
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137 boolean dc = dlConfig.getAsBoolean("img-diskcache-allowed");
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138 // TODO: methods for all toolkits?
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139 ImageIO.setUseCache(dc);
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140 // digilib worker threads
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141 int nt = dlConfig.getAsInt("worker-threads");
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142 int mt = dlConfig.getAsInt("max-waiting-threads");
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143 imageEx = new DigilibJobCenter<DocuImage>(nt, mt, false, "servlet.worker.imageexecutor");
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144 dlConfig.setValue("servlet.worker.imageexecutor", imageEx);
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145 // digilib worker timeout
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146 long to = dlConfig.getAsInt("worker-timeout");
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147 AsyncServletWorker.setTimeout(to);
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148 // PDF worker threads
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149 int pnt = dlConfig.getAsInt("pdf-worker-threads");
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150 int pmt = dlConfig.getAsInt("pdf-max-waiting-threads");
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151 pdfEx = new DigilibJobCenter<OutputStream>(pnt, pmt, false, "servlet.worker.pdfexecutor");
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152 dlConfig.setValue("servlet.worker.pdfexecutor", pdfEx);
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153 // PDF image worker threads
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154 int pint = dlConfig.getAsInt("pdf-image-worker-threads");
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155 int pimt = dlConfig.getAsInt("pdf-image-max-waiting-threads");
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156 pdfImageEx = new DigilibJobCenter<DocuImage>(pint, pimt, false, "servlet.worker.pdfimageexecutor");
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157 dlConfig.setValue("servlet.worker.pdfimageexecutor", pdfImageEx);
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158 // set as the servlets main config
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159 context.setAttribute("digilib.servlet.configuration", dlConfig);
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160
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161 } catch (Exception e) {
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162 logger.error("Error in initialisation: ", e);
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163 }
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164 } else {
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165 // say hello in the log file
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166 logger.info("***** Digital Image Library Initialiser (version "
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167 + version + ") *****");
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168 logger.warn("Already initialised!");
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169 }
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170 }
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171
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172 /** clean up local resources
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173 *
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174 */
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175 public void contextDestroyed(ServletContextEvent arg0) {
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176 logger.info("Initialiser shutting down.");
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177 if (dirCache != null) {
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178 // shut down dirCache?
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179 dirCache = null;
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180 }
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181 if (imageEx != null) {
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182 // shut down image thread pool
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183 List<Runnable> rj = imageEx.shutdownNow();
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184 int nrj = rj.size();
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185 if (nrj > 0) {
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186 logger.error("Still running threads when shutting down image job queue: "+nrj);
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187 }
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188 }
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189 if (pdfEx != null) {
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190 // shut down pdf thread pool
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191 List<Runnable> rj = pdfEx.shutdownNow();
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192 int nrj = rj.size();
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193 if (nrj > 0) {
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194 logger.error("Still running threads when shutting down PDF job queue: "+nrj);
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195 }
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196 }
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197 if (pdfImageEx != null) {
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198 // shut down pdf image thread pool
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199 List<Runnable> rj = pdfImageEx.shutdownNow();
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200 int nrj = rj.size();
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201 if (nrj > 0) {
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202 logger.error("Still running threads when shutting down PDF-image job queue: "+nrj);
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203 }
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204 }
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205 }
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206
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207 @Override
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208 public void requestDestroyed(ServletRequestEvent arg0) {
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209 int i = dlConfig.openRequestCnt.decrementAndGet();
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210 logger.debug("ServletRequest destroyed. (cnt="+i+")");
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211 }
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212
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213 @Override
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214 public void requestInitialized(ServletRequestEvent arg0) {
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215 dlConfig.webappRequestCnt.incrementAndGet();
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216 int i = dlConfig.openRequestCnt.incrementAndGet();
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217 logger.debug("ServletRequest created. (cnt="+i+")");
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218 }
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219
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220 }