[OT] Xalan and Google App Engine

[Dave Brosius <db...@mebigfatguy.com>]

I realize that this is probably a google app engine (GAE) issue, but i thought i'd float it by you smart folks, as i'm guessing you will have a better guess.


I built a google web app that requires XPath. Unfortunately GAE apparently doesn't have support for xpath, and so i added xalan.jar, serializer.jar etc to my
WEB-INF/lib. When I run, i get an exception with the pertainent parts being:

Caused by: java.lang.RuntimeException: XPathFactory#newInstance() failed to create an XPathFactory for the default object model: http://java.sun.com/jaxp/xpath/dom with the XPathFactoryConfigurationException: javax.xml.xpath.XPathFactoryConfigurationException: No XPathFactory implementation found for the object model: http://java.sun.com/jaxp/xpath/dom
	at javax.xml.xpath.XPathFactory.newInstance(Unknown Source)I tried adding a META-INF/services/javax.xml.xpath.XPathFactory file that referred to org.apache.xpath.jaxp.XPathFactoryImplbut that didn't seem to make a difference.Anyone know how i can get GAE to notice XPath as the provider for XPath?

Re: [OT] Xalan and Google App Engine

[Michael Glavassevich <mr...@ca.ibm.com>]

Perhaps you're hitting this bug [1][2] in the JDK. If so, putting the JAXP
1.3 xml-apis.jar from Xalan (or Xerces) in the endorsed directory should
solve it.

[1] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6202043
[2] http://markmail.org/message/rvlroblxyza3xt3v

Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com
E-mail: mrglavas@apache.org

"Dave Brosius" <db...@mebigfatguy.com> wrote on 04/21/2009 09:49:23 AM:

> I realize that this is probably a google app engine (GAE) issue, but
> i thought i'd float it by you smart folks, as i'm guessing you will
> have a better guess.
>
>
> I built a google web app that requires XPath. Unfortunately GAE
> apparently doesn't have support for xpath, and so i added xalan.jar,
> serializer.jar etc to my
> WEB-INF/lib. When I run, i get an exception with the pertainent parts
being:
>
> Caused by: java.lang.RuntimeException: XPathFactory#newInstance()
> failed to create an XPathFactory for the default object model:
> http://java.sun.com/jaxp/xpath/dom with the
> XPathFactoryConfigurationException:
> javax.xml.xpath.XPathFactoryConfigurationException:
> No XPathFactory implementation found for the object model: http:
> //java.sun.com/jaxp/xpath/dom
>    at javax.xml.xpath.XPathFactory.newInstance(Unknown Source)
>
> I tried adding a META-INF/services/javax.xml.xpath.XPathFactory file
> that referred to org.apache.xpath.jaxp.XPathFactoryImpl
> but that didn't seem to make a difference.
> Anyone know how i can get GAE to notice XPath as the provider for XPath?