Java Mailing List Archive

http://www.junlu.com/

Home » Home (12/2007) » JDOM User »

RE: [jdom-interest] XSLTransformer.transform method - thread safe?

Michael Kay

2007-11-15



The JDOM XSLTransformer class is really just a wrapper for a JAXP Templates
object, so it ought to be thread-safe. Bugs are always possible, but they
need evidence!

Note that when you do a Saxon transformation using this mechanism, it copies
the input from a JDOM tree to a Saxon tree. It's also possible to do a
transformation using Saxon that operates on the JDOM tree without copying,
by creating a net.sf.saxon.jdom.DocumentWrapper and supplying that as the
Source object. (However, this won't always perform better - it depends what
the transformation is actually doing).

There's only been one multithreading bug detected in Saxon over the last
year [1], and that only affects XQuery.

Michael Kay
http://www.saxonica.com/

[1]
http://sourceforge.net/tracker/index.php?func=detail&aid=1673048&group_id=29
872&atid=397617


> -----Original Message-----
> From: jdom-interest-bounces@(protected)
> [mailto:jdom-interest-bounces@(protected)
> Clint.Redwood@(protected)
> Sent: 15 November 2007 10:04
> To: jdom-interest@(protected)
> Subject: [jdom-interest] XSLTransformer.transform method -
> thread safe?
>
> Hi,
>
> I've just had an XSL transform go VERY weird, and I think it
> may be that two threads tried to use the same XSLTransformer
> object at the same time.
> The result seemed to be that it returned the untransformed data.
>
> I'm using the Saxon 8.9 XSLT2.0 Engine, and also there are
> some SAXON-SQL queries in the XSLT in question.
>
> The Javadoc states that the XSLTransformer is thread safe,
> but I'm not sure if I've either found an issue with this, or
> if there's something not threadsafe in the Saxon implementation.
>
> Any suggestions as to how I could confirm this would be
> appreaciated as I've not done much in the way of
> multi-threaded debugging.
>
> Yours,
>
> Clint Redwood
> Senior Solutions Architect - Boots Account Xansa, a Steria
> company t 0115 9595730 (Ext) 725730 (Int) e
> clint.redwood@(protected)
> http://www.xansa.com
>
>
> Whilst this email has been checked for all known viruses,
> recipients should undertake their own virus checking as Xansa
> will not accept any liability whatsoever.
>
> This email and any files transmitted with it are confidential
> and protected by client privilege. It is solely for the use
> of the intended recipient.
> Please delete it and notify the sender if you have received
> it in error. Unauthorised use is prohibited.
>
> Any opinions expressed in this email are those of the
> individual and not necessarily the organisation.
>    Xansa, Registered Office: 420 Thames Valley Park Drive,
>    Thames Valley Park, Reading, RG6 1PU, UK.
>    Registered in England No.1000954.
>    t +44 (0)8702 416181
>    w www.xansa.com
> _______________________________________________
> To control your jdom-interest membership:
> http://www.jdom.org/mailman/options/jdom-interest/youraddr@(protected)
> rhost.com

_______________________________________________
To control your jdom-interest membership:
http://www.jdom.org/mailman/options/jdom-interest/youraddr@(protected)
©2008 junlu.com - Jax Systems, LLC, U.S.A.