[J2] Using FileSystem PAM from web app class loader

[Serge Huber]

Hi,
I'm having some problem using the FileSystemPAM from within a web app 
context (seems to work in the tests, which use the system class loader).

Basically I get the following exception :
java.lang.InternalError: Can't instantiate Preferences factory 
java.lang.ClassNotFoundException: 
org.apache.jetspeed.prefs.impl.PreferencesFactoryImpl

        at java.util.prefs.Preferences.<clinit>(Preferences.java:204)
        at 
org.apache.jetspeed.om.preference.impl.PrefsPreference.createPrefenceNode(PrefsPreference.java:540)
        at 
org.apache.jetspeed.om.preference.impl.PrefsPreference.<init>(PrefsPreference.java:73)
        at 
org.apache.jetspeed.util.descriptor.PortletPreferenceRule.end(PortletPreferenceRule.java:74)
        at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
        at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown 
Source)
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown 
Source)
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown 
Source)
        at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
        at org.apache.commons.digester.Digester.parse(Digester.java:1586)
        at 
org.apache.jetspeed.util.descriptor.PortletApplicationDescriptor.createPortletApplication(PortletApplicationDescriptor.java:146)
        at 
org.apache.jetspeed.util.descriptor.PortletApplicationWar.createPortletApp(PortletApplicationWar.java:213)
        at 
org.apache.jetspeed.tools.pamanager.FileSystemPAM.registerApplication(FileSystemPAM.java:346)
        at 
org.apache.jetspeed.tools.pamanager.FileSystemPAM.sysDeploy(FileSystemPAM.java:297)
        at 
org.apache.jetspeed.tools.pamanager.FileSystemPAM.deploy(FileSystemPAM.java:89)

I looked at the JDK's source and found the following code when loading the 
PreferenceFactory implementation :

            factory = (PreferencesFactory)
               Class.forName(factoryName, false,
                             ClassLoader.getSystemClassLoader()).newInstance();
If this means what I think it does, the preference factory may only be 
loaded from the root class loader, which means that we would need to deploy 
the jetspeed-prefs*.jar into Tomcat's classpath or something.

Is this analysis correct ? If so, how to we get around this ?
Regards,
  Serge Huber.

- -- --- -----=[ shuber2 at jahia dot com ]=---- --- -- -
www.jahia.org : A collaborative source CMS and Portal Server 


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