/*
* $Header: /home/cvspublic/jakarta-struts/src/example/org/apache/struts/webapp/example/SaveSubscriptionAction.java,v 1.19 2004/03/14 06:23:44 sraeburn Exp $
* $Revision: 1.19 $
* $Date: 2004/03/14 06:23:44 $
*
* Copyright 1999-2004 The 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.lang.reflect.InvocationTargetException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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;
/**
* Implementation of <strong>Action</strong> that validates and creates or
* updates the mail subscription entered by the user.
*
* @version $Revision: 1.19 $ $Date: 2004/03/14 06:23:44 $
*/
public final class SaveSubscriptionAction extends BaseAction {
// ----------------------------------------------------- Instance Variables
/**
* The <code>Log</code> instance for this application.
*/
private Log log = LogFactory.getLog("org.apache.struts.webapp.Example");
// --------------------------------------------------------- Public Methods
// See superclass for Javadoc
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
// Extract attributes and parameters we will need
MessageResources messages = getResources(request);
HttpSession session = request.getSession();
SubscriptionForm subform = (SubscriptionForm) form;
String action = subform.getAction();
if (action == null) {
action = "?";
}
if (log.isDebugEnabled()) {
log.debug("SaveSubscriptionAction: Processing " + action + " action");
}
// Is there a currently logged on user?
User user = (User) session.getAttribute(Constants.USER_KEY);
if (user == null) {
if (log.isTraceEnabled()) {
log.trace(" User is not logged on in session " + session.getId());
}
return (mapping.findForward("logon"));
}
// Was this transaction cancelled?
if (isCancelled(request)) {
if (log.isTraceEnabled()) {
log.trace(" Transaction '" + action + "' was cancelled");
}
session.removeAttribute(Constants.SUBSCRIPTION_KEY);
return (mapping.findForward("success"));
}
// Is there a related Subscription object?
Subscription subscription =
(Subscription) session.getAttribute(Constants.SUBSCRIPTION_KEY);
if ("Create".equals(action)) {
subscription = user.createSubscription(request.getParameter("host"));
}
if (subscription == null) {
if (log.isTraceEnabled()) {
log.trace(
" Missing subscription for user '" + user.getUsername() + "'");
}
response.sendError(
HttpServletResponse.SC_BAD_REQUEST,
messages.getMessage("error.noSubscription"));
return (null);
}
// Was this transaction a Delete?
if (action.equals("Delete")) {
if (log.isTraceEnabled()) {
log.trace(
" Deleting mail server '"
+ subscription.getHost()
+ "' for user '"
+ user.getUsername()
+ "'");
}
user.removeSubscription(subscription);
session.removeAttribute(Constants.SUBSCRIPTION_KEY);
try {
UserDatabase database =
(UserDatabase) servlet.getServletContext().getAttribute(
Constants.DATABASE_KEY);
database.save();
} catch (Exception e) {
log.error("Database save", e);
}
return (mapping.findForward("success"));
}
// All required validations were done by the form itself
// Update the persistent subscription information
if (log.isTraceEnabled()) {
log.trace(" Populating database from form bean");
}
try {
PropertyUtils.copyProperties(subscription, subform);
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t == null)
t = e;
log.error("Subscription.populate", t);
throw new ServletException("Subscription.populate", t);
} catch (Throwable t) {
log.error("Subscription.populate", t);
throw new ServletException("Subscription.populate", t);
}
try {
UserDatabase database =
(UserDatabase) servlet.getServletContext().getAttribute(
Constants.DATABASE_KEY);
database.save();
} catch (Exception e) {
log.error("Database save", e);
}
// Remove the obsolete form bean and current subscription
if (mapping.getAttribute() != null) {
if ("request".equals(mapping.getScope()))
request.removeAttribute(mapping.getAttribute());
else
session.removeAttribute(mapping.getAttribute());
}
session.removeAttribute(Constants.SUBSCRIPTION_KEY);
// Forward control to the specified success URI
if (log.isTraceEnabled()) {
log.trace(" Forwarding to success page");
}
return (mapping.findForward("success"));
}
}
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