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Demo

JwaaServlet.java

package edu.virtualschool.jwaa.xml;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

import edu.virtualschool.jwaa.AccountAbstraction;
import edu.virtualschool.jwaa.Fault;
import edu.virtualschool.jwaa.GenericServlet;
import edu.virtualschool.jwaa.MetaPage;
import edu.virtualschool.jwaa.bean.DemoAccountBean;
import edu.virtualschool.jwaa.dbms.DBPool;

public class JwaaServlet extends GenericServlet
{
  DBPool connectionPool;
  File homeDirectory;
  File rootDirectory;
  String servletUrlPrefix;
  RootDirectory root;
  
  final static Logger logger = Logger.getLogger(JwaaServlet.class.getName());
  
  public JwaaServlet()
  {
    super(new edu.virtualschool.jwaa.MetaPage[] 
    { 
      Controller.meta 
    });
  }
  public void init(ServletConfig config) throws ServletException
  {
    logger.info("Initializing Jwaa/XML servlet");
    super.init(config);
    {
      String s = config.getInitParameter("home.directory");
      if (s == null)
        throw new ServletException("home.directory init parameter missing");
      this.homeDirectory = new File(s);
      if (!homeDirectory.isDirectory())
        throw new ServletException(homeDirectory+" is not a directory");
    }
    {
      File webDir = new File(homeDirectory, "WEB-INF");
      File propertiesDir = new File(webDir, "classes");
      File log4jProperties = new File(propertiesDir, "log4j.properties");
      if (!log4jProperties.exists())
        throw new ServletException (log4jProperties+" not found");
      logger.info("watching log4j properties = "+log4jProperties);
      PropertyConfigurator.configureAndWatch(log4jProperties.toString());
    }
    {
      this.servletUrlPrefix = config.getInitParameter("url.prefix");
      if (servletUrlPrefix == null)
        throw new ServletException ("url.prefix init parameter missing");
      logger.debug("url.prefix is " + servletUrlPrefix);
    }
    {
      String p = config.getInitParameter("root.directory");
      if (p == null)
        throw new ServletException("root.directory init parameter missing");
      rootDirectory = new File(p);
      logger.debug("root.directory is " + rootDirectory);
      if (!rootDirectory.isDirectory())
        throw new ServletException(rootDirectory+" is not a directory");
    }
    logger.debug("initializing root with "+rootDirectory+" and "+servletUrlPrefix);
    root = new RootDirectory(rootDirectory, servletUrlPrefix);
    logger.info("Jwaa/XML servlet initialization OK");
  }
  public final void doFault(
      MetaPage meta,
      HttpServletRequest rq,
      HttpServletResponse rs,
      Throwable e)
  {
    logger.error(e, e);
    try
    {
      PrintWriter pw = rs.getWriter();
      pw.println("<h1 align=\"center\">Whups: "+e.getMessage()+"</h1>");
      pw.println("<pre>");
      e.printStackTrace(pw);
      pw.println("</pre>");
    }
    catch (IOException e2)
    {
      e2.printStackTrace();
    }
  }
  public MetaPage getDefaultPage()
  {
    return Controller.meta;
  }
  public MetaPage getRefusePage()
  {
    return Controller.meta;
  }
  public MetaPage getRootPage()
  {
    return Controller.meta;
  }
  public AccountAbstraction getNullAccount()
  {
    return DemoAccountBean.Null;
  }
  public RootDirectory getRoot()
  {
    return root;
  }
  public Connection checkoutConnection() throws Fault
  {
    return connectionPool.checkout();
  }
  public void checkinConnection(Connection c) throws Fault
  {
    connectionPool.checkin(c);
  }
}