Re: Tapestry and PDF

At 09:26 PM 1/28/2003 -0500, Andrus wrote:
>I was wondering if anyone used Tapestry with PDF generation frameworks? 
>SourceForge mailing lists are really "searchable", so I can't tell if this 
>was discussed in the past.
>
>Anyway, just checking what potential problems I might have.
>
>PDF generation is a part of a bigger Cayenne/Tapestry application. We are 
>using iText as PDF generation framework. It seems to be more solid than 
>things like FOP.
>
>Tapestry PDF pages override "beginResponse" to set the right HTTP headers 
>and push the PDF content directly to HttpServletResponse. Unfortunately 
>this brings Tapestry down to simple servlet API. And using iText XML 
>options (with XML generated by Tapestry, and then fed to PDF generator) 
>seem like big performance overhead. Anyone has any experience with such setup?


I figured I'd still try the XML thing... As expected, only the XML -> PDF 
part now takes twice as much time as before (without XML), and I haven't 
included the actual XML rendering in the timing. Also it has to be 
double-buffered now (one bugger for XML, another for PDF to set 
"Content-Length" correctly), so I expect memory issues.

Now I need to make a decision whether the component-based design this gives 
me is worth the trouble. On the positive side, I wrote a cool 
PDFMarkupWriter, working with nested XML writer :-).

Andrus



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