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Posted to user@velocity.apache.org by "tlecavel.ml" <tl...@laposte.net> on 2006/05/18 17:08:54 UTC

Batch a template?

Hello,

The process to evaluate a template is quite long and take many
ressources on the CPU. Is it possible to "batch" a template
with a set of different context to save time?

I explain: at this time a have a function that do something like:

  StringBuffer buffer = new StringBuffer();

  Velocity.init();
  VelocityContext context = new VelocityContext(voContext);

  StringWriter w = new StringWriter();

  Velocity.evaluate(context, w,
       getConfig().getProperty("velocity.logFile"),
       template);

  buffer.append(w);
  return buffer;

And this block is called about a hundred of times where only
voContext is modified. Is there a way to evaluate just once
the template and then give Velocity a list of context to treat?

Thanks for your help.

-- Thomas.

Accédez au courrier électronique de La Poste : www.laposte.net ; 
3615 LAPOSTENET (0,34 /mn) ; tél : 08 92 68 13 50 (0,34/mn)




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Re: Batch a template?

Posted by Nathan Bubna <nb...@gmail.com>.

Don't use the evaluate() method.  That's a shortcut method that is
more expensive than the standard methods.  You just need to use
Velocity in the standard way:

http://jakarta.apache.org/velocity/docs/developer-guide.html#The%20Fundamental%20Pattern

Then the template can be parsed and cached for immediate re-use with
different contexts.

On 5/18/06, tlecavel.ml <tl...@laposte.net> wrote:
> Hello,
>
> The process to evaluate a template is quite long and take many
> ressources on the CPU. Is it possible to "batch" a template
> with a set of different context to save time?
>
> I explain: at this time a have a function that do something like:
>
>   StringBuffer buffer = new StringBuffer();
>
>   Velocity.init();
>   VelocityContext context = new VelocityContext(voContext);
>
>   StringWriter w = new StringWriter();
>
>   Velocity.evaluate(context, w,
>        getConfig().getProperty("velocity.logFile"),
>        template);
>
>   buffer.append(w);
>   return buffer;
>
> And this block is called about a hundred of times where only
> voContext is modified. Is there a way to evaluate just once
> the template and then give Velocity a list of context to treat?
>
> Thanks for your help.
>
> -- Thomas.
>
> Accédez au courrier électronique de La Poste : www.laposte.net ;
> 3615 LAPOSTENET (0,34 €/mn) ; tél : 08 92 68 13 50 (0,34€/mn)
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: velocity-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: velocity-user-help@jakarta.apache.org
>
>

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