Re: Newbee - How to create a dynamic menu in a Struts Action?

If you're using the same name as the default - you don't need to  
specify the "repository" attribute.  That's only needed if you give the  
repository a different name.

Matt

On Jun 25, 2004, at 8:50 AM, Thomas Bednarz wrote:

>  Matt Raible wrote:
>
> Yes, it looks in all contexts - so if you put it in any of them it   
> should work.  The one from reading menu-config.xml gets put in   
> application, allowing you to customize at the different levels/scopes.
>
>  Matt
>
>
>  Matt,
>
>  Thanks for your help. But it seems not really to work for me! :-(
>  Hmmm, I did the following in my Struts-Action:
>
>           
> session.getServletContext().setAttribute(MenuRepository.MENU_REPOSITORY 
> _KEY, repository);
>  and I also tried
>          session.setAttribute(MenuRepository.MENU_REPOSITORY_KEY,  
> repository);
>
> In the JSP I removed:
>  <%
>       pageContext.setAttribute("repository",   
> (MenuRepository)application.getAttribute(MenuRepository.MENU_REPOSITORY 
>  _KEY));
>       %>
>
>  so there remains simply:
>
>     <menu:useMenuDisplayer name="CoolMenu4" repository="repository">
>          <menu:displayMenu name="WNT"/>
>          <menu:displayMenu name="AD"/>
>          <menu:displayMenu name="Tools"/>
>          <menu:displayMenu name="Info"/>
>          <menu:displayMenu name="Home"/>
>      </menu:useMenuDisplayer>   
>
>  The result is an exception:
>
>  2004-06-25 16:44:34 ApplicationDispatcher[/Echnaton]  
> Servlet.service() for servlet jsp threw exception
> javax.servlet.jsp.JspException: The menu repository could not be found.
>      at  
> net.sf.navigator.taglib.UseMenuDisplayerTag.doStartTag(UseMenuDisplayer 
> Tag.java:148)
>      at  
> org.apache.jsp.Templates.EWCHeader_jsp._jspx_meth_menu_useMenuDisplayer 
> _0(EWCHeader_jsp.java:181)
>      at  
> org.apache.jsp.Templates.EWCHeader_jsp._jspService(EWCHeader_jsp.java: 
> 132)
>      at  
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
>      at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
>      ......
>
>  Any idea what I am missing?
>
>  Tom
>
>
>  On Jun 25, 2004, at 8:05 AM, Thomas Bednarz wrote:
>
>
>   Matt Raible wrote:
>
>  I'd put it into the request.
>   
>  request.setAttribute("repository", repository);
>   
>  Note that you'll have to do this every time you want to view the  
> page  since the repository will disappear once the page is done  
> loading.   You could also put it into the user's session and then it  
> would stay  there for duration of their session - however long you  
> have that set  to.
>   
>  Matt
>
>   Matt,
>
>   I found a different, maybe less elegant solution to that:
>
>   In the Struts-Action I put the stuf f in the application context:
>
>             
> session.getServletContext().setAttribute(MenuRepository.MENU_REPOSITORY 
>  _KEY, repository);
>
>   In the Jsp I take it from the application context:
>
>       <%
>       pageContext.setAttribute("repository",   
> (MenuRepository)application.getAttribute(MenuRepository.MENU_REPOSITORY 
>  _KEY));
>       %>
>   At least this works fine but may not be efficient.
>
>   What I do not understand: (Just for a better understanding how it   
> works behind the scenes)
>
>       <menu:useMenuDisplayer name="CoolMenu4" repository="repository">
>      .........
>       </menu:useMenuDisplayer>   
>
>   Where does it look for the "repository" object? Does it lookup in  
> all  contexts (Page, Request, Session, Application)?
>
>   Cheers
>
>   Tom
>
>  -----Original Message-----
>  From: struts-menu-user-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org   
> [mailto:struts-menu-user-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org] On Behalf Of   
> Thomas Bednarz
>  Sent: Friday, June 25, 2004 2:22 AM
>  To: Struts menu user list
>  Subject: [struts-menu] Newbee - How to create a dynamic menu in a   
> Struts Action?
>
>
>   Hi,
>
>   I usually work with Velocity and not with JSP. However I decided to   
> build my menu with JSP and mix Velocity and JSP. The problem is, that   
> I have no experience with JSP.
>
>   To create a dynamic menu I looked at the database sample. I have  
> the  following question:
>
>  How can I put my menu repository from a Struts Action into a JSP  
> Page  Context ?????
>
>   I have a Struts Action that builds the menu as follows:
>
>       public ActionForward perform(ActionMapping mapping, ActionForm   
> form,
>                                    HttpServletRequest request,   
> HttpServletResponse response)
>       throws IOException, ServletException
>       {
>           ActionForward af = super.perform(mapping, form, request,   
> response);
>           if (af != null)
>               return af;
>           ........
>           buildMenu(session);
>           .....
>           return (new ActionForward("/Templates/Test.jsp"));
>       }
>      
>       protected void buildMenu(HttpSession session)
>       {
>           MenuRepository repository = new MenuRepository();
>           MenuRepository defaultRepository = (MenuRepository)
>             
> session.getServletContext().getAttribute(MenuRepository.MENU_REPOSITORY 
>  _KEY);
>           repository.setDisplayers(defaultRepository.getDisplayers());
>          
>           MenuComponent mc = new MenuComponent();
>           mc.setName("Test Menu 1");
>           String title = "Menu Title";
>           mc.setTitle(title);
>           //mc.setLocation("location");
>           repository.addMenu(mc);
>          
>          // WHERE TO PUT THE REPOSITORY OBJECT (IN WHICH CONTEXT??)
>          // I should do something like   
> JSPPageContext.setAttribute("reporsitory", repository);
>      }
>
>   In the Test.jsp I would like do do something like:
>
>       <menu:useMenuDisplayer name="ListMenu" repository="repository">
>           <menu:displayMenu name="Test_Menu_1"/>
>       </menu:useMenuDisplayer>   
>
>   Many thanks for your help!
>
>   Tom.
>
>
>
>   
>
>
>
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