Velocity used like Tiles/Templates

[Dru Nelson <dr...@redwoodsoft.com>]

Hi,

I've been reading about Tiles and the Templates layout
classes that are mentioned with Struts.

I like the idea of having a system that separates
the layout from the content.

For example, using tiles one can do this:

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

<tiles:insert page="/layout.jsp" flush="true">
    <tiles:put name="header" value="/header.jsp"/>
    <tiles:put name="body" value="/aBody.jsp"/>
    <tiles:put name="footer" value="/footer.jsp"/>
</tiles:insert>


I have not used velocity, but can I assume this might
be possible?  You could refer to a page and it would
in turn do several #parse passes based on some
preset variables. Has anyone contemplated this or
implemented anything like this for a large, real
site?

If it was done, what is the performance ( I didn't see any
real performance numbers on the site for velocity ).


Dru Nelson
San Carlos, California



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Re: Velocity used like Tiles/Templates

["Geir Magnusson Jr." <ge...@adeptra.com>]

On Sunday, December 29, 2002, at 05:42 AM, Dru Nelson wrote:

>
> Hi,
>
> I've been reading about Tiles and the Templates layout
> classes that are mentioned with Struts.
>
> I like the idea of having a system that separates
> the layout from the content.
>
> For example, using tiles one can do this:
>
> <%@ taglib uri="/WEB-INF/tiles.tld" prefix="tiles" %>
>
> <tiles:insert page="/layout.jsp" flush="true">
>     <tiles:put name="header" value="/header.jsp"/>
>     <tiles:put name="body" value="/aBody.jsp"/>
>     <tiles:put name="footer" value="/footer.jsp"/>
> </tiles:insert>
>
>
> I have not used velocity, but can I assume this might
> be possible?  You could refer to a page and it would
> in turn do several #parse passes based on some
> preset variables. Has anyone contemplated this or
> implemented anything like this for a large, real
> site?

> If it was done, what is the performance ( I didn't see any
> real performance numbers on the site for velocity ).

This has been old-hat in the Velocity/WebMacro/other arena for years 
now.  You have it exactly right :

<html>
<table>
<tr>
   <td>#parse($header)</td>
</tr>
<tr>
   <td>#parse($body)</td>
</tr>
<tr>
   <td>#parse($footer)</td>
</tr>
</table>
</html>

And there shouldn't be a performance hit for doing it.  Give it a shot.


-- 
Geir Magnusson Jr                                   203-355-2219(w)
Adeptra, Inc.                                       203-247-1713(m)
geirm@adeptra.com


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