Xalan usage questions 2003-03-22 - By Foxy Shadis
Two questions, one specific about XSLT and one generally about Xalan.
First, I have a loop that runs like so:
<xsl:for-each select="$journal_entry">
<xsl:sort select="@(protected)" data-type="number" order="descending"/>
<xsl:if test="position()<=2">
...
</xsl:if>
</xsl:for-each>
I would like to optimise it in a way similar to:
<xsl:for-each select="$journal_entry[position()<=2]">
<xsl:sort select="@(protected)" data-type="number" order="descending"/>
...
</xsl:for-each>
But as I mostly expected, this gave incorrect results. The spec never
touches on doing such a thing. Is there any feasible way of doing this? One
option I've thought of would be to include the sort parameters in with the
position portion, but this seems unweildy and error-prone, duplicating
parameters each time. More importantly, though, does it matter at all, or is
the internal optimization more than capable of handling such cases without
adding extra load?
Next, I'd like to integrate Xalan into my website, running Apache. I'm not
much of a Java programmer now, never having put much into it, though I doubt
it would take much to learn. Instead my thought was to use PHP to call Xalan
(or XSLTC, though it doesn't have a lot of the EXSLT that Xalan does)
whenever a page is requested. In order to reduce unbearable load-times, my
thought was to somehow keep the java runtime and xalan loaded in memory,
ready to fire off another thread as soon as they're called. Or some sort of
plugin, so the PHP just calls a waiting plugin. The site is very
low-traffic, so I'm not really worried about overloading my weak processor
yet, except that initial load and shutdown overhead.
Feel free to tell me I'm being an quixotic Taskmaster. :) I'll probably just
have to figure out what all this servlet business is about. Any advice would
be grand!
Swiftpaw Foxyshadis, wildlife artist
foxyshadis@(protected) | http://foxyshadis.dyndns.org/
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