Decide if you want to use an action or a tiles controller.. Or a tiles action..
You can use an action if you return null rather than a forward (well
for a forward) and use the controllor url attribute. But this means
wiring an an action and a tile/ controllorUrl="/myaction.do"
Mark
On Wed, 27 Oct 2004 23:22:03 +0800, PC Leung <[EMAIL PROTECTED]> wrote:
> Error messages display as follows.
>
> [ServletException in:/layout/menu.jsp] null'
> java.lang.ClassCastException at
> org.apache.jsp.layout.menu_jsp._jspService(menu_jsp.java:193) at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
> ...
> ...
>
> after adding a few lines to test in the following class,
>
> public final class MyMenuAction extends TilesAction implements Controller {
> public ActionForward perform( ComponentContext context,
> ActionMapping mapping,
> ActionForm form,
> HttpServletRequest request,
> HttpServletResponse response)
> throws IOException, ServletException {
> perform( context, request, response, getServlet().getServletContext() );
> return null;
> }
> public void perform(ComponentContext context,
> HttpServletRequest request, HttpServletResponse response,
> ServletContext servletContext)
> throws ServletException, IOException {
> List menuItems = (List) context.getAttribute("items"); //
> menuItems.add("customize1");
> // this few lines
> menuItems.add("customize2"); //
> context.putAttribute("items", menuItems); //
> ...
>
> Struts-defs.xml:
> <definition name="erp.menu.home" path="/layout/menu.jsp"
> controllerClass="com.common.tiles.MyMenuAction" >
> <put name="title" value="Tiles" />
> <putList name="items" >
> <item value="customize1" link="/Welcome1.jsp" />
> <item value="customize2" link="/Welcome2.jsp" />
> </putList>
> </definition>
>
> How can I add a few lines of creating a list to test the menu?
>
> Thanks
>
> On Tue, 26 Oct 2004 19:57:49 +0200, Mark Lowe <[EMAIL PROTECTED]> wrote:
> > To do what you want you want a tiles controller, not an action.
> >
> > import org.apache.struts.tiles.ComponentContext;
> > import org.apache.struts.tiles.ControllerSupport;
> > import org.apache.struts.tiles.beans.SimpleMenuItem;
> > import java.util.List;
> > import javax.servlet.ServletContext;
> > import javax.servlet.ServletException;
> > import javax.servlet.http.HttpServletRequest;
> > import javax.servlet.http.HttpServletResponse;
> > import javax.servlet.http.HttpSession;
> >
> > public class GroupController extends ControllerSupport {
> > public void execute(ComponentContext tileContext,
> > HttpServletRequest request, HttpServletResponse response,
> > ServletContext context) throws Exception {
> >
> > List menuItems = (List) context.getAttribute("items");
> >
> > .. add some menu items.
> >
> > context.putAttribute("items", menuItems);
> > }
> > }
> >
> > I;d try and avoid using a tiles controller as exception handling is an
> > arse. Perhaps look at having a BaseAction that adds teh relevant items
> > into the request.
> >
> > public abstract class BaseAction extends Action {
> >
> > protected abstract ActionForward doExecute(ActionMapping mapping,
> > ActionForm form, HttpServletRequest request,
> > HttpServletResponse response) throws Exception;
> >
> > public ActionForward execute(ActionMapping mapping, ActionForm form,
> > HttpServletRequest request, HttpServletResponse response)
> > throws Exception {
> > ..
> > request.setAttribute("items",menuItems); // perhaps application
> > scope
> >
> > return doExecute(mapping, form, request, response);
> > }
> > }
> >
> > Now execute will be run for ever class that subclasses it, and they
> > will have to use the doExecute(), method.. For more details check the
> > xpetstore project out that uses this technique. This approach will
> > allow you to make use of exception handlers.
> >
> > Mark
> >
> >
> >
> >
> > On 26 Oct 2004, at 17:14, PC Leung wrote:
> >
> > > Hello world,
> > >
> > > The following is a fragment of tiles-defs.xml.
> > > where MyMenuAction actually is UserMenuAction in Tiles.
> > >
> > > <definition name="erp.menu.home" path="/layout/menu.jsp"
> > > controllerClass="com.common.tiles.MyMenuAction" >
> > > <put name="title" value="Tiles" />
> > > <putList name="items" >
> > > <item value="customize" link="/Welcome.jsp" />
> > > ^^^^^^^^^^ ^^^^^^^^^^^^^^^
> > > </putList>
> > > </definition>
> > >
> > > Where and how should I put the coding inside MyMenuAction
> > > so that I can add a number of items which behaves as
> > > a list of menu item?
> > >
> > > Thanks
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
