web.xmlでの listener について

<?xml version="1.0" encoding="ISO-8859-1"?>



<!DOCTYPE web-app

    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

    "http://java.sun.com/dtd/web-app_2_3.dtd">



<web-app>

  <display-name>Struts Blank Application</display-name>



	<listener>

  		<listener-class>listeners.TorqueInitServletContextListener</listener-class>

	</listener>



  <!-- Standard Action Servlet Configuration (with debugging) -->

  <servlet>

    <servlet-name>action</servlet-name>

    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>

    <init-param>

      <param-name>config</param-name>

      <param-value>/WEB-INF/struts-config.xml</param-value>

    </init-param>

    <init-param>

      <param-name>debug</param-name>

      <param-value>2</param-value>

    </init-param>

    <init-param>

      <param-name>detail</param-name>

      <param-value>2</param-value>

    </init-param>

    <load-on-startup>2</load-on-startup>

  </servlet>





  <!-- Standard Action Servlet Mapping -->

  <servlet-mapping>

    <servlet-name>action</servlet-name>

    <url-pattern>*.do</url-pattern>

  </servlet-mapping>





  <!-- The Usual Welcome File List -->



  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>





  <!-- Struts Tag Library Descriptors -->

  <taglib>

    <taglib-uri>/tags/struts-bean</taglib-uri>

    <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>

  </taglib>



  <taglib>

    <taglib-uri>/tags/struts-html</taglib-uri>

    <taglib-location>/WEB-INF/struts-html.tld</taglib-location>

  </taglib>



  <taglib>

    <taglib-uri>/tags/struts-logic</taglib-uri>

    <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>

  </taglib>



  <taglib>

    <taglib-uri>/tags/struts-nested</taglib-uri>

    <taglib-location>/WEB-INF/struts-nested.tld</taglib-location>

  </taglib>



  <taglib>

    <taglib-uri>/tags/struts-tiles</taglib-uri>

    <taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>

  </taglib>



</web-app>

package listeners;

import java.io.PrintWriter;
import java.io.StringWriter;

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

import org.apache.torque.Torque;
import org.apache.torque.TorqueException;

public class TorqueInitServletContextListener
	implements ServletContextListener {
	public TorqueInitServletContextListener() {
	}
	/* (non-Javadoc)
	 * @see javax.servlet.ServletContextListener#contextInitialized(javax.servlet.ServletContextEvent)
	 */
	public void contextInitialized(ServletContextEvent event) {
		ServletContext context = event.getServletContext();
		String path = "/WEB-INF/Torque.properties";
		String realPath = context.getRealPath(path);
		try {
			Torque.init(realPath);
		} catch (TorqueException te) {
			try {
				StringWriter str = new StringWriter();
				PrintWriter p = new PrintWriter(str);
				te.printStackTrace(p);
				context.log(str.toString());			
			} catch (Exception e) {
			}
		}
	}

	/* (non-Javadoc)
	 * @see javax.servlet.ServletContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
	 */
	public void contextDestroyed(ServletContextEvent arg0) {
	}

}