savealiasaction.java

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/*
 * $Header: /home/cvs/jakarta-tomcat-catalina/webapps/admin/WEB-INF/classes/org/apache/webapp/admin/host/SaveAliasAction.java,v 1.1.1.1 2002/07/18 16:48:25 remm Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2002/07/18 16:48:25 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2002 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
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 *    the documentation and/or other materials provided with the
 *    distribution.
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 * 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", "Struts", 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 [e-mail].
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 * 5. Products derived from this software may not be called "Apache"
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package org.apache.webapp.admin.host;

import java.net.URLEncoder;
import java.util.Iterator;
import java.util.Locale;
import java.util.List;
import java.io.IOException;
import javax.management.Attribute;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.QueryExp;
import javax.management.Query;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.JMException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
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>Add Alias</em> and
 * <em>Edit Alias</em> transactions.
 *
 * @author Manveen Kaur
 * @version $Revision: 1.1.1.1 $ $Date: 2002/07/18 16:48:25 $
 */

public final class SaveAliasAction extends Action {


    // ----------------------------------------------------- Instance Variables

    /**
     * Signature for the <code>createStandardAlias</code> operation.
     */
    private String createStandardAliasTypes[] =
    { "java.lang.String",     // host
    };

    /**
     * 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 {
        
        // Acquire the resources that we need
        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);
        }
        
        // Identify the requested action
        AliasForm aform = (AliasForm) form;

        // Perform a "Create Alias" transaction (if requested)
        String operation = "addAlias";
        
        //alias to be added
        Object values[] = new String[1];
        values[0] = aform.getAliasName();

        String hostName = aform.getHostName();

        // validate if this alias already exists.
        List aliasVals = aform.getAliasVals();
        if (aliasVals.contains(values[0])) {
           ActionErrors errors = new ActionErrors();
            errors.add("aliasName",
                       new ActionError("error.aliasName.exists"));
            saveErrors(request, errors);
            return (new ActionForward(mapping.getInput()));
        }
        
        try {
            
            ObjectName hname = new ObjectName(hostName);
            mBServer.invoke(hname, operation, values, createStandardAliasTypes);

        } catch (Throwable t) {
            getServlet().log
            (resources.getMessage(locale, "users.error.invoke",
                                  operation), t);
            response.sendError
                (HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                resources.getMessage(locale, "users.error.invoke",
                                     operation));
            return (null);            
        }
                        
        // Forward to the success reporting page
        session.removeAttribute(mapping.getAttribute());
        return (mapping.findForward("Save Successful"));
        
    }
    
}