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EditSubscriptionAction.javaAPI DocExample4843Tue Jul 27 06:01:18 BST 2004org.apache.struts.webapp.example

EditSubscriptionAction

public final class EditSubscriptionAction extends org.apache.struts.action.Action
Implementation of Action that populates an instance of SubscriptionForm from the currently specified subscription.
version
$Revision: 1.18 $ $Date: 2004/03/14 06:23:44 $

Fields Summary
private Log
log
The Log instance for this application.
Constructors Summary
Methods Summary
public org.apache.struts.action.ActionForwardexecute(org.apache.struts.action.ActionMapping mapping, org.apache.struts.action.ActionForm form, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)


    // --------------------------------------------------------- Public Methods

        // See superclass for Javadoc
      
         
         
         
         
          

        // Extract attributes we will need
        HttpSession session = request.getSession();
        String action = request.getParameter("action");
        if (action == null) {
            action = "Create";
        }
        
        String host = request.getParameter("host");
        if (log.isDebugEnabled()) {
            log.debug("EditSubscriptionAction:  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"));
        }

        // Identify the relevant subscription
        Subscription subscription =
            user.findSubscription(request.getParameter("host"));
            
        if ((subscription == null) && !action.equals("Create")) {
            if (log.isTraceEnabled()) {
                log.trace(
                    " No subscription for user "
                        + user.getUsername()
                        + " and host "
                        + host);
            }
            
            return (mapping.findForward("failure"));
        }
        
        if (subscription != null) {
            session.setAttribute(Constants.SUBSCRIPTION_KEY, subscription);
        }

        SubscriptionForm subform = (SubscriptionForm) form;
        subform.setAction(action);
        if (!action.equals("Create")) {
            if (log.isTraceEnabled()) {
                log.trace(" Populating form from " + subscription);
            }
            
            try {
                PropertyUtils.copyProperties(subform, subscription);
                subform.setAction(action);
                
            } catch (InvocationTargetException e) {
                Throwable t = e.getTargetException();
                if (t == null)
                    t = e;
                log.error("SubscriptionForm.populate", t);
                throw new ServletException("SubscriptionForm.populate", t);
                
            } catch (Throwable t) {
                log.error("SubscriptionForm.populate", t);
                throw new ServletException("SubscriptionForm.populate", t);
            }
        }

        // Forward control to the edit subscription page
        if (log.isTraceEnabled()) {
            log.trace(" Forwarding to 'success' page");
        }
        
        return (mapping.findForward("success"));