RE: [xsl] Pre loaded/compiled stylesheets for xsl:include - How t o do it?

["Yates, Danny (ANTS)" <danny.yates@xxxxxxxxxx>]

Hi Jude,

Have you looked at the Apache Xalan XSLTC Translet compiler? You can
pre-compile your stylesheets into Java bytecode. I've not looked at
it in too much detail - I know you can do it programatically using
the JAXP/TrAX API - but I think you can also do it at from the
command line and get a .class file out.

If you decide to do it programatically, you can cache the resulting
Translets in memory. They will be much smaller and faster than the
normal tree-based representation of your stylesheet used by most
processors.

Regards,

Dan.

-- 
Danny Yates
Technical Architect
Abbey National Treasury Services
E-mail: Danny.Yates@xxxxxxxxxx
Phone: +44 20 7612 4017
Fax: +44 20 7612 4342


-----Original Message-----
From: Jude Albert [mailto:judealbert78@xxxxxxxxx]
Sent: 30 August 2002 10:46
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: [xsl] Pre loaded/compiled stylesheets for xsl:include - How to
do it?


Hi

My project has several xsls (around 60) with the
following format

<?xml version="1.0" standalone='no'?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>

<xsl:include href = "user_options.xsl"/>
<xsl:include href = "include.xsl"/>
<xsl:include href = "common.xsl"/>

<xsl:template match="/">
  some xsl code
</xsl:template>

The three include stylesheets mentioned above will be
included in most of the stylesheets.  And they are of
considerable size.  Is there any way by which I can
cache these include stylesheets alone and link the
cached thing to all other stylesheets while
loading/parsing them?  (I'm using XT)  

Here is the reason for the question:
I have moved all the commonly used templates to one of
the three above mentioned include files.  This helps
me in avoiding code duplication and makes my
stylesheets more readable.

But my making several commonly used templates to be
generic, the xsl stylesheet size has grown
considerably and it is beating me with a great
performance bottleneck.  Considerable time is spent in
the stylesheet loading and parsing.  

I tried caching all the stylesheets.  It gave me a
good performance improvement but the memory grows very
huge.  I do not want either it to happen.

So I want to have only those include stylesheets to be
cached and include them when the normal stylesheet is
loaded (on the servlet side).  By doing so, it is not
going to affect memory significantly and at the same
time will reduce the loading/parsing time for other
stylesheets.

Thanks in advance
Jude



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