/*
* $Id: WelcomeAction.java 54929 2004-10-16 16:38:42Z germuska $
*
* Copyright 2000-2004 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.struts.webapp.example;
import java.util.ArrayList;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.webapp.example.UserDatabase;
import org.apache.struts.util.MessageResources;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
/**
* <p>
* Confirm required resources are available. If a resource is missing,
* forward to "failure". Otherwise, forward to "success", where
* success is usually the "welcome" page.
* </p>
* <p>
* Since "required resources" includes the application MessageResources
* the failure page must not use the standard error or message tags.
* Instead, it display the Strings stored in an ArrayList stored under
* the request attribute "ERROR".
* </p>
*
* @version $Rev: 54929 $ $Date: 2004-10-16 17:38:42 +0100 (Sat, 16 Oct 2004) $
*/
public final class WelcomeAction extends BaseAction {
// --------------------------------------------------------- Public Methods
// See superclass for Javadoc
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
// Setup message array in case there are errors
ArrayList messages = new ArrayList();
// Confirm message resources loaded
MessageResources resources = getResources(request);
if (resources==null) {
messages.add(Constants.ERROR_MESSAGES_NOT_LOADED);
}
// Confirm database loaded
UserDatabase userDatabase = getUserDatabase(request);
if (userDatabase==null) {
messages.add(Constants.ERROR_DATABASE_NOT_LOADED);
}
// If there were errors, forward to our failure page
if (messages.size()>0) {
request.setAttribute(Constants.ERROR_KEY,messages);
return findFailure(mapping);
}
// Forward to our success page
return findSuccess(mapping);
}
}