/*
 * $Header: /home/cvs/jakarta-tomcat-catalina/webapps/admin/WEB-INF/classes/org/apache/webapp/admin/realm/DeleteRealmsAction.java,v 1.3 2003/03/20 05:40:10 amyroh Exp $
 * $Revision: 1.3 $
 * $Date: 2003/03/20 05:40:10 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions 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.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */


package org.apache.webapp.admin.realm;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Locale;
import java.util.Set;
import java.util.TreeSet;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.ObjectInstance;
import javax.management.modelmbean.ModelMBean;
import javax.servlet.ServletException;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.util.MessageResources;

import org.apache.webapp.admin.ApplicationServlet;
import org.apache.webapp.admin.TomcatTreeBuilder;
import org.apache.webapp.admin.TreeControl;
import org.apache.webapp.admin.TreeControlNode;


/**
 * The <code>Action</code> that completes <em>Delete Realms</em>
 * transactions.
 *
 * @author Manveen Kaur
 * @version $Revision: 1.3 $ $Date: 2003/03/20 05:40:10 $
 */

public class DeleteRealmsAction extends Action {


    /**
     * Signature for the <code>removeRealm</code> operation.
     */
    private String removeRealmTypes[] =
    { "java.lang.String",      // Object name
    };


    /**
     * The MBeanServer we will be interacting with.
     */
    private MBeanServer mBServer = null;
    

    /**
     * The MessageResources we will be retrieving messages from.
     */
    private MessageResources resources = null;


    // --------------------------------------------------------- Public Methods
    
    
    /**
     * Process the specified HTTP request, and create the corresponding HTTP
     * response (or forward to another web component that will create it).
     * Return an <code>ActionForward</code> instance describing where and how
     * control should be forwarded, or <code>null</code> if the response has
     * already been completed.
     *
     * @param mapping The ActionMapping used to select this instance
     * @param actionForm The optional ActionForm bean for this request (if any)
     * @param request The HTTP request we are processing
     * @param response The HTTP response we are creating
     *
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet exception occurs
     */
    public ActionForward perform(ActionMapping mapping,
                                 ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response)
        throws IOException, ServletException {
        
        
        // Look up the components we will be using as needed
        HttpSession session = request.getSession();
        Locale locale = (Locale) session.getAttribute(Action.LOCALE_KEY);
        if (resources == null) {
            resources = getServlet().getResources();
        }

        // Acquire a reference to the MBeanServer containing our MBeans
        try {
            mBServer = ((ApplicationServlet) getServlet()).getServer();
        } catch (Throwable t) {
            throw new ServletException
            ("Cannot acquire MBeanServer reference", t);
        }
        
        // Delete the specified Realms
        String realms[]  = ((RealmsForm) form).getRealms();
        String values[] = new String[1];
        String operation = "removeRealm";
        try {

            // Look up our tree control data structure
            TreeControl control = (TreeControl)
                session.getAttribute("treeControlTest");

            // Remove the specified realms
            for (int i = 0; i < realms.length; i++) {
                values[0] = realms[i];
                if (control != null) {
                    control.selectNode(null);
                    TreeControlNode node = control.findNode(realms[i]);
                    String domain = node.getDomain();
                    ObjectName fname = 
                        TomcatTreeBuilder.getMBeanFactory();
                    mBServer.invoke(fname, operation,
                                values, removeRealmTypes);
                    if (node != null) {
                        node.remove();
                    } else {
                        getServlet().log("Missing TreeControlNode for " +
                                         realms[i]);
                    }
                } else {
                    getServlet().log("Missing TreeControl attribute");
                }
            }

        } catch (Exception e) {

            getServlet().log
                (resources.getMessage(locale, "users.error.invoke",
                                      operation), e);
            response.sendError
                (HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                 resources.getMessage(locale, "users.error.invoke",
                                      operation));
            return (null);

        }

        // Report successful completion of this transaction
        return (mapping.findForward("Save Successful"));

    }
    
}
