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Re: [xsl] Running out of Memory

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Michael Kay,
Thank you. Works well.
Terry Badger

From: Michael Kay
<mike@xxxxxxxxxxxx>
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
Sent: Wednesday,
August 15, 2012 6:52 PM
Subject: Re: [xsl] Running out of Memory

Many
implementations will keep a document loaded doc() in memory in case 
you read
the same URI again, so they can satisfy the rule that you get 
the identical
document instance both times.

Saxon provides a way of avoiding this using the
saxon:discard-document() 
extension function.

Michael Kay
Saxonica

On
15/08/2012 21:02, Terry Badger wrote:
> I use the attached template to collect
all of the files in a given archieve into a variable $all-chapters and each
time the loop ran it would destory the variable and I would use little memory.
After processing a few 100 archieves I run out of memory. Am I thinging about
this correctly? Is there a more correct way to do this?
> Terry
> Here is the
template:
> <xsl:templatename="main">
>
<xsl:result-documenthref="{concat($protocol , $base-out , '/' , $date ,
'_all-chapters_' , $book , '.txt')}"format="badger-1">
> <!--
==================================================================== -->
>
<!-- use Java to get the list of files - not all version of Saxon will work
-->
> <xsl:variablename="dir"select="file:new(resolve-uri(concat('file:/' ,
$base-in)))"/>
> <xsl:variablename="files"select="file:listFiles($dir)"/>
>
<xsl:for-eachselect="$files">
> <xsl:variablename="uri-to-string">
>
<xsl:value-ofselect="."/>
> </xsl:variable>
>
<xsl:variablename="file-name"select="subsequence(reverse(tokenize($uri-to-str
ing, '\\')), 1, 1)"/>
> <!-- process the selected book or All -->
>
<xsl:variablename="all-chapters">
>
<xsl:variablename="chapter"select="$file-name"/>
>
<xsl:variablename="document"select="doc(concat($jar-protocol , $base-in ,
$file-name , '!' , '/designmap.xml'))"/>
> <xsl:elementname="chapter">
>
<xsl:attributename="name"select="$chapter"/>
>
<xsl:copy-ofselect="$document"/>
> <xsl:elementname="MasterSpreads-all">
>
<xsl:for-eachselect="$document/Document/idPkg:MasterSpread/@src">
>
<xsl:copy-ofselect="doc(concat($jar-protocol , $base-in , $file-name , '!/' ,
.))"/>
> </xsl:for-each>
> </xsl:element>
> <xsl:elementname="Spreads-all">
>
<xsl:for-eachselect="$document/Document/idPkg:Spread/@src">
>
<xsl:copy-ofselect="doc(concat($jar-protocol , $base-in , $file-name , '!/' ,
.))"/>
> </xsl:for-each>
> </xsl:element>
> <xsl:elementname="Stories-all">
>
<xsl:for-eachselect="$document/Document/idPkg:Story/@src">
>
<xsl:copy-ofselect="doc(concat($jar-protocol , $base-in , $file-name , '!/' ,
.))"/>
> </xsl:for-each>
> </xsl:element>
> </xsl:element>
> </xsl:variable>
>
<!-- the work is done here -->
> <!-- <xsl:apply-templates
select="$all-chapters"/>-->
> </xsl:for-each>
> </xsl:result-document>
>
</xsl:template>
>
>
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