error implementing menus using tiles

[Sriram Nookala <sr...@mediaone.net>]

I'm trying to create a dynamic menu using the tiles tutorial, but I get the
following error when I display the jsp:

[ServletException in:/topnavbar.jsp] Cannot find bean links in scope page'

What am I doing wrong?

thanks,
sriram

My implementation is as follows:

1. I have a topnvabar.jsp which is similar to the tiles example submenu.jsp:

<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>

<%@ taglib uri="/WEB-INF/tiles.tld" prefix="comp" %>

<%@ page import="java.util.Iterator" %>



<%-- Push component attributes in page context --%>

<comp:importAttribute />

<table>

<logic:present name="title">

<tr>

<th colspan=2>

<div align="left"><strong><bean:write name="title"/></strong></div>

</th>

</tr>

</logic:present>

<%-- Check if selected exist. --%>

<logic:notPresent name="selected" >

<% pageContext.setAttribute( "selected", "" ); %>

</logic:notPresent>

<%-- Prepare the links list to be iterated --%>

<bean:define id="links" name="links" type="java.util.List" scope="page" />

<% Iterator i = links.iterator(); %>

<%-- iterate on items list --%>

<%-- Normally, we should write something like this :

<logic:iterate id="item" name="items" type="java.lang.String" >

But, Struts doesn't declare the TEI class for iterate, and

some web container deal badly with the declared variable.

So, we use what follow instead.

--%>

<logic:iterate id="iterateItem" name="items" >

<bean:define id="item" name="iterateItem" type="java.lang.String"
scope="page" />



<tr>

<td width="10" valign="top" ></td>

<td valign="top" >

<%-- check if selected --%>

<logic:notEqual name="selected" value="<%=item%>">

<% // Compute link value

String link = (String)i.next();

if(link.startsWith("/") )

link = request.getContextPath() + link;

%>

<font size="-1"><a href="<%=link%>"><%=item%></a></font>

</logic:notEqual>

<logic:equal name="selected" value="<%=item%>">

<font size="-1" color="fuchsia"><%=item%></font>

</logic:equal>

</td>

</tr>

</logic:iterate>

</table>



2. I have a tilesDefinitons.xml with the following relevant entries:



<tiles-definitions>
    <definition name="baseDef" path="/TopLevelTemplate.jsp">
      <put name="title" value="" />
      <put name="topnavbar" value="topnavbar.links" />
      <put name="sectionnavbar" value="/sectionnavbar.jsp" />
      <put name="leftnavbar" value="/leftnavbar.jsp" />
      <put name="content" value="" />
      <put name="footer" value="/footer.jsp" />
    </definition>

    <definition name="topnavbar.links" path="/topnavbar.jsp" >
      <put name="selected" value="Home" />
      <putList name="items" >
        <add value="Home" />
        <add value="Campaign" />
        <add value="Segment" />
        <add value="Analyze" />
        <add value="Profile" />
        <add value="Admin" />
      </putList>
      <putList name="links" >
        <add value="home.action" />
        <add value="campaignlist.action?name=home" />
        <add value="home.action" />
        <add value="home.action" />
        <add value="home.action" />
        <add value="home.action" />
      </putList>
    </definition>

    <definition name="home" extends="baseDef">
      <put name="title" value="Campaign Manager Home" />
      <put name="content" value="/HomeContent.jsp" />
    </definition>

</tiles-definitions>





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Re: error implementing menus using tiles

[Cedric Dumoulin <ce...@lifl.fr>]

  Hello,

  Checking quickly your code, I can't find any problems.
  Can you confirm that you have successfully installed and use Tiles
documentation ? Also, what url do you use to access the topnavbar.jsp, or its
parents ?

  Cedric

Sriram Nookala wrote:

> I'm trying to create a dynamic menu using the tiles tutorial, but I get the
> following error when I display the jsp:
>
> [ServletException in:/topnavbar.jsp] Cannot find bean links in scope page'
>
> What am I doing wrong?
>
> thanks,
> sriram
>
> My implementation is as follows:
>
> 1. I have a topnvabar.jsp which is similar to the tiles example submenu.jsp:
>
> <%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
>
> <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
>
> <%@ taglib uri="/WEB-INF/tiles.tld" prefix="comp" %>
>
> <%@ page import="java.util.Iterator" %>
>
> <%-- Push component attributes in page context --%>
>
> <comp:importAttribute />
>
> <table>
>
> <logic:present name="title">
>
> <tr>
>
> <th colspan=2>
>
> <div align="left"><strong><bean:write name="title"/></strong></div>
>
> </th>
>
> </tr>
>
> </logic:present>
>
> <%-- Check if selected exist. --%>
>
> <logic:notPresent name="selected" >
>
> <% pageContext.setAttribute( "selected", "" ); %>
>
> </logic:notPresent>
>
> <%-- Prepare the links list to be iterated --%>
>
> <bean:define id="links" name="links" type="java.util.List" scope="page" />
>
> <% Iterator i = links.iterator(); %>
>
> <%-- iterate on items list --%>
>
> <%-- Normally, we should write something like this :
>
> <logic:iterate id="item" name="items" type="java.lang.String" >
>
> But, Struts doesn't declare the TEI class for iterate, and
>
> some web container deal badly with the declared variable.
>
> So, we use what follow instead.
>
> --%>
>
> <logic:iterate id="iterateItem" name="items" >
>
> <bean:define id="item" name="iterateItem" type="java.lang.String"
> scope="page" />
>
> <tr>
>
> <td width="10" valign="top" ></td>
>
> <td valign="top" >
>
> <%-- check if selected --%>
>
> <logic:notEqual name="selected" value="<%=item%>">
>
> <% // Compute link value
>
> String link = (String)i.next();
>
> if(link.startsWith("/") )
>
> link = request.getContextPath() + link;
>
> %>
>
> <font size="-1"><a href="<%=link%>"><%=item%></a></font>
>
> </logic:notEqual>
>
> <logic:equal name="selected" value="<%=item%>">
>
> <font size="-1" color="fuchsia"><%=item%></font>
>
> </logic:equal>
>
> </td>
>
> </tr>
>
> </logic:iterate>
>
> </table>
>
> 2. I have a tilesDefinitons.xml with the following relevant entries:
>
> <tiles-definitions>
>     <definition name="baseDef" path="/TopLevelTemplate.jsp">
>       <put name="title" value="" />
>       <put name="topnavbar" value="topnavbar.links" />
>       <put name="sectionnavbar" value="/sectionnavbar.jsp" />
>       <put name="leftnavbar" value="/leftnavbar.jsp" />
>       <put name="content" value="" />
>       <put name="footer" value="/footer.jsp" />
>     </definition>
>
>     <definition name="topnavbar.links" path="/topnavbar.jsp" >
>       <put name="selected" value="Home" />
>       <putList name="items" >
>         <add value="Home" />
>         <add value="Campaign" />
>         <add value="Segment" />
>         <add value="Analyze" />
>         <add value="Profile" />
>         <add value="Admin" />
>       </putList>
>       <putList name="links" >
>         <add value="home.action" />
>         <add value="campaignlist.action?name=home" />
>         <add value="home.action" />
>         <add value="home.action" />
>         <add value="home.action" />
>         <add value="home.action" />
>       </putList>
>     </definition>
>
>     <definition name="home" extends="baseDef">
>       <put name="title" value="Campaign Manager Home" />
>       <put name="content" value="/HomeContent.jsp" />
>     </definition>
>
> </tiles-definitions>
>
> --
> To unsubscribe, e-mail:   <ma...@jakarta.apache.org>
> For additional commands, e-mail: <ma...@jakarta.apache.org>


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