savecontextaction.java

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/*
 * $Header: /home/cvs/jakarta-tomcat-catalina/webapps/admin/WEB-INF/classes/org/apache/webapp/admin/context/SaveContextAction.java,v 1.11 2003/05/27 23:11:25 amyroh Exp $
 * $Revision: 1.11 $
 * $Date: 2003/05/27 23:11:25 $
 *
 * ====================================================================
 *
 * 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.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    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", "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].
 *
 * 5. Products derived from this software may not be called "Apache"
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 * SUCH DAMAGE.
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 * 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/>.
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package org.apache.webapp.admin.context;


import java.net.URLEncoder;
import java.util.Iterator;
import java.util.Locale;
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.commons.modeler.Registry;
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 Context</em> and
 * <em>Edit Context</em> transactions.
 *
 * @author Manveen Kaur
 * @version $Revision: 1.11 $ $Date: 2003/05/27 23:11:25 $
 */

public final class SaveContextAction extends Action {


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

    /**
     * Signature for the <code>createStandardContext</code> operation.
     */
    private String createStandardContextTypes[] =
    { "java.lang.String",     // parent
      "java.lang.String",     // path
      "java.lang.String",     // docBase
    };

   /**
     * Signature for the <code>createStandardLoader</code> operation.
     */
    private String createStandardLoaderTypes[] =
    { "java.lang.String",     // parent
    };

   /**
     * Signature for the <code>createStandardManager</code> operation.
     */
    private String createStandardManagerTypes[] =
    { "java.lang.String",     // parent
    };

    /**
     * Signature for the <code>removeContext</code> operation.
     */
    private String removeContextTypes[] =
    { "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 {
        
        // 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
        ContextForm cform = (ContextForm) form;
        String adminAction = cform.getAdminAction();
        String cObjectName = cform.getObjectName();
        String lObjectName = cform.getLoaderObjectName();
        String mObjectName = cform.getManagerObjectName();
        if ((cform.getPath() == null) || (cform.getPath().length()<1)) {
            cform.setPath("/");
        }
       
        // Perform a "Create Context" transaction (if requested)
        if ("Create".equals(adminAction)) {

            String operation = null;
            Object values[] = null;
            
            try {                
                // get the parent host name
                String parentName = cform.getParentObjectName();
                ObjectName honame = new ObjectName(parentName);
                
                // Ensure that the requested context name is unique
                ObjectName oname = 
                        new ObjectName(honame.getDomain() + 
                                    ":j2eeType=WebModule,name=//" +
                                    honame.getKeyProperty("host") + 
                                    cform.getPath() +
                                    // FIXME set J2EEApplication and J2EEServer
                                    ",J2EEApplication=none,J2EEServer=none");                   
                
                if (mBServer.isRegistered(oname)) {
                    ActionErrors errors = new ActionErrors();
                    errors.add("contextName",
                               new ActionError("error.contextName.exists"));
                    saveErrors(request, errors);
                    return (new ActionForward(mapping.getInput()));
                }
                
                // Look up our MBeanFactory MBean
                ObjectName fname = 
                    TomcatTreeBuilder.getMBeanFactory();

                // Create a new StandardContext object
                values = new Object[3];
                values[0] = parentName;
                values[1] = cform.getPath();
                values[2] = cform.getDocBase();
                
                operation = "createStandardContext";
                cObjectName = (String)
                    mBServer.invoke(fname, operation,
                                    values, createStandardContextTypes);
                // Create a new Loader object
                values = new String[1];
                // parent of loader is the newly created context
                values[0] = cObjectName.toString();
                operation = "createWebappLoader";
                lObjectName = (String)
                    mBServer.invoke(fname, operation,
                                    values, createStandardLoaderTypes);                
                
                // Create a new StandardManager object
                values = new String[1];
                // parent of manager is the newly created Context
                values[0] = cObjectName.toString();
                operation = "createStandardManager";
                mObjectName = (String)
                    mBServer.invoke(fname, operation,
                                    values, createStandardManagerTypes);
                                                                       
                if (mObjectName==null) {
                    operation = "removeLoader";
                    values[0] = lObjectName;
                    mBServer.invoke(fname, operation, values, 
                        removeContextTypes);
                    operation = "removeContext";
                    values[0] = cObjectName;
                    mBServer.invoke(fname, operation, values, 
                        removeContextTypes);
                    Registry.getRegistry().unregisterComponent(new ObjectName(cObjectName));
                    request.setAttribute("warning", "error.context.directory");
                    return (mapping.findForward("Save Unsuccessful"));
                }
                
                // Add the new Context to our tree control node
                addToTreeControlNode(oname, cObjectName, parentName, 
                                    resources, session);                     

            } 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);

            }

        }