addguestbookaction.java

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/*
 * @author                        : Neelesh
 * @Version                       : 1.0
 *
 * Development Environment        : Oracle9i JDeveloper
 * Name of the File               : AddGuestbookAction.java
 * Creation/Modification History  :
 *
 * Neelesh   04-Apr-2003      Created
 *
 */
package oracle.otnsamples.vsm.actions.mall;


//Servlet and IO API
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import oracle.otnsamples.util.MessageCache;
import oracle.otnsamples.util.ServiceLocator;
import oracle.otnsamples.vsm.actions.forms.GuestbookForm;
import oracle.otnsamples.vsm.services.MallNavigation;
import oracle.otnsamples.vsm.services.MallNavigationHome;
import oracle.otnsamples.vsm.services.ServiceException;
import oracle.otnsamples.vsm.services.data.Guestbook;

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;


/**
 * The action class adds an entry to the guestbook.
 *
 * @author Neelesh
 * @version 1.0
 */
 public class AddGuestbookAction extends HomePageAction {
  /**
   * This is the action called from the Struts framework to add an entry to the
   * guestbook.
   *
   * @param <b>mapping</b> The ActionMapping used to select this instance.
   * @param <b>form</b> The optional ActionForm bean for this request.
   * @param <b>request</b> The HTTP Request we are processing.
   * @param <b>response</b> The HTTP Response we are processing.
   *
   * @return <b>ActionForward</b> The  control forward information
   *
   * @throws <b>IOException</b>
   * @throws <b>ServletException</b>
   */
  public ActionForward execute(
                               ActionMapping mapping, ActionForm form,
                               HttpServletRequest request,
                               HttpServletResponse response)
                               throws IOException, ServletException {

    MallNavigationHome navigationHome =
      (MallNavigationHome) ServiceLocator.getLocator().getService("MallNavigation");
    MallNavigation navigation = null;

    try {
      navigation = navigationHome.create();
      
      GuestbookForm guestbookForm = (GuestbookForm) form;
      String langID               = getLocale(request).getLanguage();
      // create a value object for guestbook entry
      Guestbook guestbookEntry    =
        new Guestbook(
                      null, guestbookForm.getUserName(),
                      guestbookForm.getEmail(), guestbookForm.getRating(),
                      guestbookForm.getComments(), null, langID);
      // add the entry to the application                      
      navigation.addGuestbookEntry(guestbookEntry);
      // Save  the key for success message in the session
      request.getSession().setAttribute("messageKey","message.guestbookadd");
    } catch(ServiceException ex) {
      // handle errors
      servlet.log("GuestbookError", ex);
      ActionErrors errors = new ActionErrors();
      errors.add(
                 "GuestbookError",
                 new ActionError(
                                 "error.guestbookaction",
                                 MessageCache.getMessage(
                                                         ex.getMessageCode(),
                                                         getLocale(request))));
      saveErrors(request, errors);

      return mapping.findForward("failure");

    } catch(Exception ex) {
      //log errors
      servlet.log("GuestbookError", ex);
      // save error message
      ActionErrors errors = new ActionErrors();
      errors.add("HomePageError", new ActionError("error.guestbookaction"));
      saveErrors(request, errors);
      // forward to error page
      return mapping.findForward("failure");

    } finally {
      // remove SLSB instance
      if(navigation != null) {
        try {
          navigation.remove();
        } catch(Exception ex) {
        }
      }
    }
    // since the control comes to main page, data needed by that page
    // is provided in the exexute method of HomePageAction
    super.execute(mapping, form, request, response);

    return mapping.findForward("success");
  }
}