createuserservlet.java

sun公司的petstore,一个J2ee的示例应用程序.

/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * - Redistributions of source code must retain the above copyright
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 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
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 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
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package com.sun.j2ee.blueprints.signon.web;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServlet;

import javax.ejb.CreateException;
import javax.naming.NamingException;
import javax.naming.InitialContext;

// SignOn EJB Imports
import com.sun.j2ee.blueprints.signon.ejb.SignOnLocalHome;
import com.sun.j2ee.blueprints.signon.ejb.SignOnLocal;


public class CreateUserServlet extends HttpServlet {

     public  void doPost(HttpServletRequest request, HttpServletResponse  response)
        throws IOException, ServletException {
        // convert to a http servlet request for now

        // get the user name
        String userName = request.getParameter(SignOnFilter.FORM_USER_NAME);
        // get the password
        String password = request.getParameter(SignOnFilter.FORM_PASSWORD);
        //validate against the registered users
        System.out.println("CreateUserServlet create user: username=" + userName);
        System.out.println("CreateUserServlet create user: password=" + password);
        SignOnLocal signOn = getSignOnEjb();
        try {
             signOn.createUser(userName, password);
            // restore the request attributes and parameters -- maybe later
            // place a true boolean in the session
            String targetURL = (String)request.getSession().getAttribute(SignOnFilter.ORIGINAL_URL);
            // redirect to the original destination
            request.getSession().setAttribute(SignOnFilter.SIGNED_ON_USER, new Boolean(true));
            System.out.println("CreateUserServlet:: create good redirecting to original requested url=" + targetURL );
            response.sendRedirect(targetURL);
        } catch (CreateException ce) {
            System.out.println("CreateUserServlet:: redirecting to user creation error error url"  );
            response.sendRedirect("user_creation_error.jsp");
        }
     }

     private SignOnLocal getSignOnEjb() throws ServletException {
         SignOnLocal signOn = null;
         try {
            InitialContext ic = new InitialContext();
            Object o = ic.lookup("java:comp/env/ejb/SignOn");
            SignOnLocalHome home =(SignOnLocalHome)o;
            signOn = home.create();
         } catch (javax.ejb.CreateException cx) {
             throw new ServletException("Failed to Create SignOn EJB: caught " + cx);
         } catch (javax.naming.NamingException nx) {
             throw new ServletException("Failed to Create SignOn EJB: caught " + nx);
        }
        return signOn;
     }
}