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From Paul Libbrecht <p...@hoplahup.net>
Subject Re: [Jelly] XML ForEach tag hangs
Date Sat, 30 Apr 2011 14:20:44 GMT
Here's a little script that will tell you the URL of classes of interest:

<j:jelly trim="false" xmlns:j="jelly:core">

  <j:new var="x" className="org.dom4j.tree.DefaultDocument"/>
  class ${x.getClass()} loaded from ${x.getClass().getResource('DefaultDocument.class')}

  <j:new var="x" className="org.xml.sax.helpers.DefaultHandler"/>
  class ${x.getClass()} loaded from ${x.getClass().getResource('DefaultHandler.class')}

</j:jelly>

With some chances, your URLs are of the form file:///xxxxx.jar!a/b/c/d/e.class
If you have a special protocol-handler, it may be harder.

paul


Le 30 avr. 2011 à 15:40, Csaba Győrffy a écrit :

> Hi,
> 
> thank you very much for your responses. I'm already trying to
> determine the version of xml parser without much success yet.
> 
> Csaba
> 
> 2011/4/30 Martin Gainty <mgainty@hotmail.com>:
>> 
>> trying not to point fingers (at least until we have ALL the facts)
>> a similar incident happened on another apache project and an older version of xml-parser
was at fault
>> trying to determine the implemented xml-parser and the version in this case would
*at least* isolate the problem to that parser
>> 
>> thanks paul!
>> Martin
>> ______________________________________________
>> Jogi és Bizalmassági kinyilatkoztatás
>>  Ez az
>> üzenet bizalmas.  Ha nem ön az akinek szánva volt, akkor kérjük, hogy
>> jelentse azt nekünk vissza. Semmiféle továbbítása vagy másolatának
>> készítése nem megengedett.  Ez az üzenet csak ismeret cserét szolgál és
>> semmiféle jogi alkalmazhatósága sincs.  Mivel az electronikus üzenetek
>> könnyen megváltoztathatóak, ezért minket semmi felelöség nem terhelhet
>> ezen üzenet tartalma miatt.
>> 
>> 
>> 
>> 
>> 
>>> Subject: Re: [Jelly] XML ForEach tag hangs
>>> From: paul@hoplahup.net
>>> Date: Sat, 30 Apr 2011 09:44:27 +0200
>>> To: user@commons.apache.org
>>> 
>>> Csaba,
>>> 
>>> As Martin has suggested, the underlying XML parser could be guilty.
>>> I would rather suspect an overly old dom4j or jaxen (that would be in the container's
classpath hence overriding the webapp's).
>>> 
>>> Are you able to find their version?
>>> Otherwise I can dig out a form of jwhich in jelly.
>>> 
>>> paul
>>> 
>>> 
>>> Le 30 avr. 2011 à 03:02, Csaba Győrffy a écrit :
>>> 
>>>> Hello there!
>>>> 
>>>> I'm trying to use the ForEach tag in Jelly's XML tag library. The
>>>> following script works fine in a standard Java console application:
>>>> 
>>>> <x:parse var="doc">
>>>>  <a>
>>>>    <b v="1"/>
>>>>    <b v="2"/>
>>>>    <b v="3"/>
>>>>  </a>
>>>> </x:parse>
>>>> 
>>>> <x:forEach select="$doc/a/b" var="x">
>>>>  ...
>>>> </x:forEach>
>>>> 
>>>> However, if using Jelly on an application server, from inside an EJB
>>>> container (session bean), running the script above hangs, and 100% CPU
>>>> utilisation comes. I realized while debugging that NodeComparator
>>>> class' getDepth method gets into an infinite loop and never returns.
>>>> 
>>>> If I remove two "b" elements from the xml fragment above (so only one
>>>> remains), it works fine. It also works if I change the second part of
>>>> the above script to the following:
>>>> 
>>>> <x:forEach select="$doc/a">
>>>>  <x:forEach select="b">
>>>>    ...
>>>>  </x:forEach>
>>>> </x:forEach>
>>>> 
>>>> Does anyone have any idea why is that happening? Any help is much appreciated.
>>>> 
>>>> Thank you:
>>>> Csaba
>>>> 
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>>>> 
>>> 
>>> 
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>> 
> 
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