/**
 * <copyright> Copyright (c) 2006 by Know-Center, Graz, Austria </copyright>
 * 
 * This software is the confidential and proprietary information of Know-Center,
 * Graz, Austria. You shall not disclose such Confidential Information and shall
 * use it only in accordance with the terms of the license agreement you entered
 * into with Know-Center.
 * 
 * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 * 
 * $Id: PdfASServletContextListener.java,v 1.3 2006/10/31 08:22:04 wprinz Exp $
 */
package at.knowcenter.wag.egov.egiz.web;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.log4j.Logger;

import at.gv.egiz.pdfas.api.commons.Constants;
import at.gv.egiz.pdfas.utils.ConfigUtils;
import at.knowcenter.wag.egov.egiz.cfg.ConfigLogger;
import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;
import at.knowcenter.wag.egov.egiz.exceptions.SettingsException;

/**
 * The ServletContextListener is notified when the webapplication starts up and shuts down.
 * 
 * <p>
 * Maintainance work is performed.
 * </p>
 * 
 * @author wprinz
 */
public class PdfASServletContextListener implements ServletContextListener
{
  /**
   * The logger.
   */
  private static final Logger logger = ConfigLogger.getLogger(PdfASServletContextListener.class);
  
  
  /**
   * The servlet init parameter that may be used to declare the pdf-as configuration folder. The
   * init parameter may be set in web.xml or in META-INF/context.xml resp.
   * conf/Catalina/localhost/pdf-as.xml if deployed.
   */
  private final static String CONFIG_SERVLET_INIT_PARAMETER = "work-dir";

  /**
   * @see javax.servlet.ServletContextListener#contextInitialized(javax.servlet.ServletContextEvent)
   */
  public void contextInitialized(ServletContextEvent sce)
  {
    logger.info("PDF-AS Context init"); //$NON-NLS-1$
    
    String sysPropWorkdir = System.getProperty(Constants.CONFIG_DIR_SYSTEM_PROPERTY);
    String scWorkdir = sce.getServletContext().getInitParameter(CONFIG_SERVLET_INIT_PARAMETER);
    
    String work_dir;

    // search for system property
    if (sysPropWorkdir != null && sysPropWorkdir.length() > 0) {
       work_dir = sysPropWorkdir;
       logger.debug("Work-dir configuration via system property \"" + Constants.CONFIG_DIR_SYSTEM_PROPERTY + "\" = \"" + sysPropWorkdir + "\".");
       
    // search for servlet parameter
    } else if (scWorkdir != null && scWorkdir.length() > 0){
       work_dir = scWorkdir;
       logger.debug("Work-dir configuration via servlet init parameter \"" + CONFIG_SERVLET_INIT_PARAMETER + "\" = \"" + scWorkdir + "\".");
    
    // assume configuration to be located in webapp path
    } else {
       work_dir = sce.getServletContext().getRealPath("/");
       logger.debug("PDF-AS work-dir not explicitely given. Assuming configuration is located in webapp folder \"" + work_dir + "\".");
    }
    
    logger.info("PDF-AS configuration location = \"" + work_dir + "\"");

//    try
//    {
//      logger.info("PDF-AS work directory = " + new File(work_dir).getCanonicalPath()); //$NON-NLS-1$
//      logger.info("PDF-AS base directory = " + new File(base_dir).getCanonicalPath()); //$NON-NLS-1$
//    }
//    catch (IOException e)
//    {
//      e.printStackTrace();
//    }
    
    
    SettingsReader.initializeForWeb(work_dir);
    ConfigUtils.initializeLogger();
    try {
      SettingsReader.getInstance();
   } catch (SettingsException e) {
      logger.error(e.getMessage(), e);
   }

    SettingsReader.clearTemporaryDirectory();
  }

  /**
   * @see javax.servlet.ServletContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
   */
  public void contextDestroyed(ServletContextEvent sce)
  {
    SettingsReader.clearTemporaryDirectory();
    logger.info("PDF-AS Context exit"); //$NON-NLS-1$
  }
}