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From Mike Spoonauer <mspoona...@tradecard.com>
Subject RE: How can I use XPath in my OSGi bundle?
Date Fri, 02 Dec 2011 17:05:18 GMT

Thanks for the response.  I found that, for JIRA, if you set the following property, you can
access Sun's internal implementations of JAXP classes:

<!-- configure our own logging -->

I tested in code that the above system property was not set until I set it in my plugin's
pom.xml file.

The alternative that I tried was to download and install the Xalan 2.7.1 OSGi bundle and all
of its dependencies into the Felix Web Management console, and to update my plugin's pom.xml
to set Xalan 2.7.1 as a dependency, but it didn't seem to matter.  JAXP always went for the
Xalan 2.7.0 JAR that's within the JIRA Web application's lib folder, even if I explicitly
excluded it from the "atlassian-jira" dependency, and Eclipse's Dependency Hierarchy view
showed that it was excluded.

Have you ever run into anything like that before, where the classloader seems to ignore that
you said to use version Y of a dependency instead of version X?


-----Original Message-----
From: Rob Walker [mailto:robw@ascert.com] 
Sent: Friday, December 02, 2011 8:51 AM
To: users@felix.apache.org
Subject: Re: How can I use XPath in my OSGi bundle?


Not sure I can help there much I'm afraid - we use Felix in an entirely embedded environment,
so I haven't used Web Console much, nor Atlassian.

In theory, I think most properties set in Felix config should end up accessible to Bundles
via BundleContext.getProperty(), but of course you'll need some code to call that to dump
out the values.

-- Rob

On 02/12/2011 3:22 PM, Mike Spoonauer wrote:
> Rob,
> Thanks for the response.  How can I tell what that property has been set to within the
container and is there any way that I can control it?  I am actually attempting to deploy
a plugin I'm developing to a local installation of Atlassian's JIRA product.  If it helps
at all, I do have access to the Felix Web Console.
> Thanks again for your time.
> -Mike
> -----Original Message-----
> From: Rob Walker [mailto:robw@ascert.com]
> Sent: Friday, December 02, 2011 12:48 AM
> To: users@felix.apache.org
> Subject: Re: How can I use XPath in my OSGi bundle?
> Not sure if it's the exact same scenario, but all our configs have:
> org.osgi.framework.bootdelegation = sun.*,com.sun.*
> Xpath works fine
> -- Rob
> On 02/12/2011 5:41 AM, Mike Spoonauer wrote:
>> I am working on a bundle in which I want to use XPath.  I'm using 
>> Java 1.6, so I don't need Xalan or Xerces or anything like that.  The 
>> JDK
>> 1.6 comes with default implementations for all of the major XML APIs.
>> When I attempt, though, to call XPathFactory.newInstance() within my 
>> OSGi bundle, it fails with the following exception stack trace:
>> java.lang.ClassNotFoundException:
>> com.sun.org.apache.xpath.internal.jaxp.XPathFactoryImpl
>> [INFO] [talledLocalContainer]   at
>> org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation
>> (
>> ModuleImpl.java:772)
>> [INFO] [talledLocalContainer]   at
>> org.apache.felix.framework.ModuleImpl.access$200(ModuleImpl.java:73)
>> [INFO] [talledLocalContainer]   at
>> org.apache.felix.framework.ModuleImpl$ModuleClassLoader.loadClass(Mod
>> u
>> leImpl.java:1690)
>> [INFO] [talledLocalContainer]   at
>> java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>> [INFO] [talledLocalContainer]   at
>> org.apache.felix.framework.ModuleImpl.getClassByDelegation(ModuleImpl.
>> java:634)
>> [INFO] [talledLocalContainer]   at
>> org.apache.felix.framework.Felix.loadBundleClass(Felix.java:1594)
>> [INFO] [talledLocalContainer]   at
>> org.apache.felix.framework.BundleImpl.loadClass(BundleImpl.java:887)
>> [INFO] [talledLocalContainer]   at
>> org.springframework.osgi.util.BundleDelegatingClassLoader.findClass(B
>> u
>> ndleDelegatingClassLoader.java:99)
>> What is the appropriate means by which to tell the 
>> BundleDelegatingClassloader to find 
>> com.sun.org.apache.xpath.internal.jaxp.XPathFactoryImpl in rt.jar?
>> Thanks,
>> Mike
>> Michael Spoonauer
>> Enterprise Systems Management Engineer TradeCard, Inc.
>> M: (617) 233-7959 | E: mspoonauer@tradecard.com 
>> <mailto:mspoonauer@tradecard.com>
>> Connect. Transact. Profit.(r)
>> Find out more at www.tradecard.com<http://www.tradecard.com/>
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